[PATCH] log: add log.excludeDecoration config option

[PATCH] log: add log.excludeDecoration config option

[Derrick Stolee via GitGitGadget]

From: Derrick Stolee <dstolee@microsoft.com>

In 'git log', the --decorate-refs-exclude option appends a pattern
to a string_list. This list is used to prevent showing some refs
in the decoration output, or even by --simplify-by-decoration.

Users may want to use their refs space to store utility refs that
should not appear in the decoration output. For example, Scalar [1]
runs a background fetch but places the "new" refs inside the
refs/scalar/hidden/<remote>/* refspace instead of refs/<remote>/*
to avoid updating remote refs when the user is not looking. However,
these "hidden" refs appear during regular 'git log' queries.

A similar idea to use "hidden" refs is under consideration for core
Git [2].

Add the 'log.excludeDecoration' config option so users can exclude
some refs from decorations by default instead of needing to use
--decorate-refs-exclude manually. The config value is multi-valued
much like the command-line option.

There are several tests in t4202-log.sh that test the
--decorate-refs-(include|exclude) options, so these are extended.
Since the expected output is already stored as a file, simply add
new calls that replace a "--decorate-refs-exclude" option with an
in-line config setting.

[1] https://github.com/microsoft/scalar
[2] https://lore.kernel.org/git/77b1da5d3063a2404cd750adfe3bb8be9b6c497d.1585946894.git.gitgitgadget@gmail.com/

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
---
    log: add log.excludeDecoration config option
    
    This was something hinted at in the "fetch" step of the background
    maintenance RFC. Should be a relatively minor addition to our config
    options.
    
    We definitely want this feature for microsoft/git (we would set
    log.excludeDecoration=refs/scalar/* in all Scalar repos), but we will
    wait for feedback from the community.
    
    Thanks, -Stolee

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-610%2Fderrickstolee%2Flog-exclude-decoration-v1
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-610/derrickstolee/log-exclude-decoration-v1
Pull-Request: https://github.com/gitgitgadget/git/pull/610

 Documentation/config/log.txt |  5 +++++
 builtin/log.c                | 14 ++++++++++++++
 t/t4202-log.sh               | 22 ++++++++++++++++++++++
 3 files changed, 41 insertions(+)

diff --git a/Documentation/config/log.txt b/Documentation/config/log.txt
index e9e1e397f3f..1a158324f79 100644
--- a/Documentation/config/log.txt
+++ b/Documentation/config/log.txt
@@ -18,6 +18,11 @@ log.decorate::
 	names are shown. This is the same as the `--decorate` option
 	of the `git log`.
 
+log.excludeDecoration::
+	Exclude the specified patterns from the log decorations. This multi-
+	valued config option is the same as the `--decorate-refs-exclude`
+	option of `git log`.
+
 log.follow::
 	If `true`, `git log` will act as if the `--follow` option was used when
 	a single <path> is given.  This has the same limitations as `--follow`,
diff --git a/builtin/log.c b/builtin/log.c
index 83a4a6188e2..d7d1d5b7143 100644
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -236,7 +236,21 @@ static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
 	}
 
 	if (decoration_style) {
+		const struct string_list *config_exclude =
+			repo_config_get_value_multi(the_repository,
+						    "log.excludeDecoration");
+
+		if (config_exclude) {
+			struct string_list_item *item;
+			for (item = config_exclude->items;
+			     item && item < config_exclude->items + config_exclude->nr;
+			     item++)
+				string_list_append(&decorate_refs_exclude,
+						item->string);
+		}
+
 		rev->show_decorations = 1;
+
 		load_ref_decorations(&decoration_filter, decoration_style);
 	}
 
diff --git a/t/t4202-log.sh b/t/t4202-log.sh
index 0f766ba65f5..b5de449e510 100755
--- a/t/t4202-log.sh
+++ b/t/t4202-log.sh
@@ -787,6 +787,9 @@ test_expect_success 'decorate-refs-exclude with glob' '
 	EOF
 	git log -n6 --decorate=short --pretty="tformat:%f%d" \
 		--decorate-refs-exclude="heads/octopus*" >actual &&
+	test_cmp expect.decorate actual &&
+	git -c log.excludeDecoration="heads/octopus*" log \
+		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
 	test_cmp expect.decorate actual
 '
 
@@ -801,6 +804,9 @@ test_expect_success 'decorate-refs-exclude without globs' '
 	EOF
 	git log -n6 --decorate=short --pretty="tformat:%f%d" \
 		--decorate-refs-exclude="tags/reach" >actual &&
+	test_cmp expect.decorate actual &&
+	git -c log.excludeDecoration="tags/reach" log \
+		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
 	test_cmp expect.decorate actual
 '
 
@@ -816,6 +822,14 @@ test_expect_success 'multiple decorate-refs-exclude' '
 	git log -n6 --decorate=short --pretty="tformat:%f%d" \
 		--decorate-refs-exclude="heads/octopus*" \
 		--decorate-refs-exclude="tags/reach" >actual &&
+	test_cmp expect.decorate actual &&
+	git -c log.excludeDecoration="heads/octopus*" \
+		-c log.excludeDecoration="tags/reach" log \
+		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
+	test_cmp expect.decorate actual &&
+	git -c log.excludeDecoration="heads/octopus*" log \
+		--decorate-refs-exclude="tags/reach" \
+		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
 	test_cmp expect.decorate actual
 '
 
@@ -831,6 +845,10 @@ test_expect_success 'decorate-refs and decorate-refs-exclude' '
 	git log -n6 --decorate=short --pretty="tformat:%f%d" \
 		--decorate-refs="heads/*" \
 		--decorate-refs-exclude="heads/oc*" >actual &&
+	test_cmp expect.decorate actual &&
+	git -c log.excludeDecoration="heads/oc*" log \
+		--decorate-refs="heads/*" \
+		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
 	test_cmp expect.decorate actual
 '
 
@@ -846,6 +864,10 @@ test_expect_success 'decorate-refs-exclude and simplify-by-decoration' '
 	git log -n6 --decorate=short --pretty="tformat:%f%d" \
 		--decorate-refs-exclude="*octopus*" \
 		--simplify-by-decoration >actual &&
+	test_cmp expect.decorate actual &&
+	git -c log.excludeDecoration="*octopus*" log \
+		-n6 --decorate=short --pretty="tformat:%f%d" \
+		--simplify-by-decoration >actual &&
 	test_cmp expect.decorate actual
 '
 

base-commit: 274b9cc25322d9ee79aa8e6d4e86f0ffe5ced925
-- 
gitgitgadget

Re: [PATCH] log: add log.excludeDecoration config option

[Taylor Blau]

Hi Stolee,

On Mon, Apr 13, 2020 at 03:28:39PM +0000, Derrick Stolee via GitGitGadget wrote:
> From: Derrick Stolee <dstolee@microsoft.com>
>
> In 'git log', the --decorate-refs-exclude option appends a pattern
> to a string_list. This list is used to prevent showing some refs
> in the decoration output, or even by --simplify-by-decoration.
>
> Users may want to use their refs space to store utility refs that
> should not appear in the decoration output. For example, Scalar [1]
> runs a background fetch but places the "new" refs inside the
> refs/scalar/hidden/<remote>/* refspace instead of refs/<remote>/*
> to avoid updating remote refs when the user is not looking. However,
> these "hidden" refs appear during regular 'git log' queries.
>
> A similar idea to use "hidden" refs is under consideration for core
> Git [2].
>
> Add the 'log.excludeDecoration' config option so users can exclude
> some refs from decorations by default instead of needing to use
> --decorate-refs-exclude manually. The config value is multi-valued
> much like the command-line option.
>
> There are several tests in t4202-log.sh that test the
> --decorate-refs-(include|exclude) options, so these are extended.
> Since the expected output is already stored as a file, simply add
> new calls that replace a "--decorate-refs-exclude" option with an
> in-line config setting.
>
> [1] https://github.com/microsoft/scalar
> [2] https://lore.kernel.org/git/77b1da5d3063a2404cd750adfe3bb8be9b6c497d.1585946894.git.gitgitgadget@gmail.com/
>
> Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
> ---
>     log: add log.excludeDecoration config option
>
>     This was something hinted at in the "fetch" step of the background
>     maintenance RFC. Should be a relatively minor addition to our config
>     options.
>
>     We definitely want this feature for microsoft/git (we would set
>     log.excludeDecoration=refs/scalar/* in all Scalar repos), but we will
>     wait for feedback from the community.
>
>     Thanks, -Stolee
>
> Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-610%2Fderrickstolee%2Flog-exclude-decoration-v1
> Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-610/derrickstolee/log-exclude-decoration-v1
> Pull-Request: https://github.com/gitgitgadget/git/pull/610
>
>  Documentation/config/log.txt |  5 +++++
>  builtin/log.c                | 14 ++++++++++++++
>  t/t4202-log.sh               | 22 ++++++++++++++++++++++
>  3 files changed, 41 insertions(+)
>
> diff --git a/Documentation/config/log.txt b/Documentation/config/log.txt
> index e9e1e397f3f..1a158324f79 100644
> --- a/Documentation/config/log.txt
> +++ b/Documentation/config/log.txt
> @@ -18,6 +18,11 @@ log.decorate::
>  	names are shown. This is the same as the `--decorate` option
>  	of the `git log`.
>
> +log.excludeDecoration::
> +	Exclude the specified patterns from the log decorations. This multi-
> +	valued config option is the same as the `--decorate-refs-exclude`
> +	option of `git log`.
> +

Thanks for this documentation update. Do you think that it would be
worth updating the entry for '--decorate-refs-exclude', too? I figure
that it would be good, since scripters who look at 'git log's man page
before 'git config's would have a trail to follow in case they want a
persistent '--decorate-refs-exclude' option.

>  log.follow::
>  	If `true`, `git log` will act as if the `--follow` option was used when
>  	a single <path> is given.  This has the same limitations as `--follow`,
> diff --git a/builtin/log.c b/builtin/log.c
> index 83a4a6188e2..d7d1d5b7143 100644
> --- a/builtin/log.c
> +++ b/builtin/log.c
> @@ -236,7 +236,21 @@ static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
>  	}
>
>  	if (decoration_style) {
> +		const struct string_list *config_exclude =
> +			repo_config_get_value_multi(the_repository,
> +						    "log.excludeDecoration");
> +
> +		if (config_exclude) {
> +			struct string_list_item *item;
> +			for (item = config_exclude->items;
> +			     item && item < config_exclude->items + config_exclude->nr;
> +			     item++)

Any reason not to use the 'for_each_string_list_item' macro in
'string-list.h' for this?

> +				string_list_append(&decorate_refs_exclude,
> +						item->string);
> +		}
> +

On my first read, I thought that there might be some value in using a
hash set here, since I (incorrectly) thought that only literal reference
names were added here, in which case we'd benefit from a constant time
lookup.

But, since we store patterns here, it's not helpful for us to have a
constant time lookup, since we don't have anything to look up in the
first place! I guess you could expand out all of these patterns ahead of
time, but I don't think that this is universally a good thing to do. We
may have a pattern like 'refs/heads/*', but we're only doing a 'git log'
over a part of history that doesn't have many/any refs pointing at it,
in which case expanding ahead of time was a bad thing to do.

Of course, 'string_list_append' is going to potentially introduce
duplicate patterns, but I don't think that should be a huge problem,
since 'ref_filter_match' stops as soon as it finds an exclude/include. I
guess you could use 'string_list_insert', but it makes insertions more
expensive without a clear benefit.

>  		rev->show_decorations = 1;
> +
>  		load_ref_decorations(&decoration_filter, decoration_style);
>  	}
>
> diff --git a/t/t4202-log.sh b/t/t4202-log.sh
> index 0f766ba65f5..b5de449e510 100755
> --- a/t/t4202-log.sh
> +++ b/t/t4202-log.sh
> @@ -787,6 +787,9 @@ test_expect_success 'decorate-refs-exclude with glob' '
>  	EOF
>  	git log -n6 --decorate=short --pretty="tformat:%f%d" \
>  		--decorate-refs-exclude="heads/octopus*" >actual &&
> +	test_cmp expect.decorate actual &&
> +	git -c log.excludeDecoration="heads/octopus*" log \
> +		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
>  	test_cmp expect.decorate actual
>  '
>
> @@ -801,6 +804,9 @@ test_expect_success 'decorate-refs-exclude without globs' '
>  	EOF
>  	git log -n6 --decorate=short --pretty="tformat:%f%d" \
>  		--decorate-refs-exclude="tags/reach" >actual &&
> +	test_cmp expect.decorate actual &&
> +	git -c log.excludeDecoration="tags/reach" log \
> +		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
>  	test_cmp expect.decorate actual
>  '
>
> @@ -816,6 +822,14 @@ test_expect_success 'multiple decorate-refs-exclude' '
>  	git log -n6 --decorate=short --pretty="tformat:%f%d" \
>  		--decorate-refs-exclude="heads/octopus*" \
>  		--decorate-refs-exclude="tags/reach" >actual &&
> +	test_cmp expect.decorate actual &&
> +	git -c log.excludeDecoration="heads/octopus*" \
> +		-c log.excludeDecoration="tags/reach" log \
> +		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
> +	test_cmp expect.decorate actual &&
> +	git -c log.excludeDecoration="heads/octopus*" log \
> +		--decorate-refs-exclude="tags/reach" \
> +		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
>  	test_cmp expect.decorate actual
>  '
>
> @@ -831,6 +845,10 @@ test_expect_success 'decorate-refs and decorate-refs-exclude' '
>  	git log -n6 --decorate=short --pretty="tformat:%f%d" \
>  		--decorate-refs="heads/*" \
>  		--decorate-refs-exclude="heads/oc*" >actual &&
> +	test_cmp expect.decorate actual &&
> +	git -c log.excludeDecoration="heads/oc*" log \
> +		--decorate-refs="heads/*" \
> +		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
>  	test_cmp expect.decorate actual
>  '
>
> @@ -846,6 +864,10 @@ test_expect_success 'decorate-refs-exclude and simplify-by-decoration' '
>  	git log -n6 --decorate=short --pretty="tformat:%f%d" \
>  		--decorate-refs-exclude="*octopus*" \
>  		--simplify-by-decoration >actual &&
> +	test_cmp expect.decorate actual &&
> +	git -c log.excludeDecoration="*octopus*" log \
> +		-n6 --decorate=short --pretty="tformat:%f%d" \
> +		--simplify-by-decoration >actual &&
>  	test_cmp expect.decorate actual
>  '
>

Thanks for the tests, they look good. I like your strategy of repeating
the test with and without the new config settings.

>
> base-commit: 274b9cc25322d9ee79aa8e6d4e86f0ffe5ced925
> --
> gitgitgadget

Thanks,
Taylor

Re: [PATCH] log: add log.excludeDecoration config option

[Derrick Stolee]

On 4/13/2020 11:49 AM, Taylor Blau wrote:
> Hi Stolee,
> 
> On Mon, Apr 13, 2020 at 03:28:39PM +0000, Derrick Stolee via GitGitGadget wrote:
>> From: Derrick Stolee <dstolee@microsoft.com>
>>
>> In 'git log', the --decorate-refs-exclude option appends a pattern
>> to a string_list. This list is used to prevent showing some refs
>> in the decoration output, or even by --simplify-by-decoration.
>>
>> Users may want to use their refs space to store utility refs that
>> should not appear in the decoration output. For example, Scalar [1]
>> runs a background fetch but places the "new" refs inside the
>> refs/scalar/hidden/<remote>/* refspace instead of refs/<remote>/*
>> to avoid updating remote refs when the user is not looking. However,
>> these "hidden" refs appear during regular 'git log' queries.
>>
>> A similar idea to use "hidden" refs is under consideration for core
>> Git [2].
>>
>> Add the 'log.excludeDecoration' config option so users can exclude
>> some refs from decorations by default instead of needing to use
>> --decorate-refs-exclude manually. The config value is multi-valued
>> much like the command-line option.
>>
>> There are several tests in t4202-log.sh that test the
>> --decorate-refs-(include|exclude) options, so these are extended.
>> Since the expected output is already stored as a file, simply add
>> new calls that replace a "--decorate-refs-exclude" option with an
>> in-line config setting.
>>
>> [1] https://github.com/microsoft/scalar
>> [2] https://lore.kernel.org/git/77b1da5d3063a2404cd750adfe3bb8be9b6c497d.1585946894.git.gitgitgadget@gmail.com/
>>
>> Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
>> ---
>>     log: add log.excludeDecoration config option
>>
>>     This was something hinted at in the "fetch" step of the background
>>     maintenance RFC. Should be a relatively minor addition to our config
>>     options.
>>
>>     We definitely want this feature for microsoft/git (we would set
>>     log.excludeDecoration=refs/scalar/* in all Scalar repos), but we will
>>     wait for feedback from the community.
>>
>>     Thanks, -Stolee
>>
>> Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-610%2Fderrickstolee%2Flog-exclude-decoration-v1
>> Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-610/derrickstolee/log-exclude-decoration-v1
>> Pull-Request: https://github.com/gitgitgadget/git/pull/610
>>
>>  Documentation/config/log.txt |  5 +++++
>>  builtin/log.c                | 14 ++++++++++++++
>>  t/t4202-log.sh               | 22 ++++++++++++++++++++++
>>  3 files changed, 41 insertions(+)
>>
>> diff --git a/Documentation/config/log.txt b/Documentation/config/log.txt
>> index e9e1e397f3f..1a158324f79 100644
>> --- a/Documentation/config/log.txt
>> +++ b/Documentation/config/log.txt
>> @@ -18,6 +18,11 @@ log.decorate::
>>  	names are shown. This is the same as the `--decorate` option
>>  	of the `git log`.
>>
>> +log.excludeDecoration::
>> +	Exclude the specified patterns from the log decorations. This multi-
>> +	valued config option is the same as the `--decorate-refs-exclude`
>> +	option of `git log`.
>> +
> 
> Thanks for this documentation update. Do you think that it would be
> worth updating the entry for '--decorate-refs-exclude', too? I figure
> that it would be good, since scripters who look at 'git log's man page
> before 'git config's would have a trail to follow in case they want a
> persistent '--decorate-refs-exclude' option.

That seems like a good way to help users.

>>  log.follow::
>>  	If `true`, `git log` will act as if the `--follow` option was used when
>>  	a single <path> is given.  This has the same limitations as `--follow`,
>> diff --git a/builtin/log.c b/builtin/log.c
>> index 83a4a6188e2..d7d1d5b7143 100644
>> --- a/builtin/log.c
>> +++ b/builtin/log.c
>> @@ -236,7 +236,21 @@ static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
>>  	}
>>
>>  	if (decoration_style) {
>> +		const struct string_list *config_exclude =
>> +			repo_config_get_value_multi(the_repository,
>> +						    "log.excludeDecoration");
>> +
>> +		if (config_exclude) {
>> +			struct string_list_item *item;
>> +			for (item = config_exclude->items;
>> +			     item && item < config_exclude->items + config_exclude->nr;
>> +			     item++)
> 
> Any reason not to use the 'for_each_string_list_item' macro in
> 'string-list.h' for this?

The reason is I forgot about it.

Thanks,
-Stolee

Re: [PATCH] log: add log.excludeDecoration config option

[Taylor Blau]

On Tue, Apr 14, 2020 at 11:10:33AM -0400, Derrick Stolee wrote:
> >>  log.follow::
> >>  	If `true`, `git log` will act as if the `--follow` option was used when
> >>  	a single <path> is given.  This has the same limitations as `--follow`,
> >> diff --git a/builtin/log.c b/builtin/log.c
> >> index 83a4a6188e2..d7d1d5b7143 100644
> >> --- a/builtin/log.c
> >> +++ b/builtin/log.c
> >> @@ -236,7 +236,21 @@ static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
> >>  	}
> >>
> >>  	if (decoration_style) {
> >> +		const struct string_list *config_exclude =
> >> +			repo_config_get_value_multi(the_repository,
> >> +						    "log.excludeDecoration");
> >> +
> >> +		if (config_exclude) {
> >> +			struct string_list_item *item;
> >> +			for (item = config_exclude->items;
> >> +			     item && item < config_exclude->items + config_exclude->nr;
> >> +			     item++)
> >
> > Any reason not to use the 'for_each_string_list_item' macro in
> > 'string-list.h' for this?
>
> The reason is I forgot about it.

Heh, in fairness I forgot about it, too :). I thought that this code
looked familiar, but it was only luck that I had 'string-list.h' open at
the time I was reading this.

I don't think that it really matters much each way, but if you're
already re-rolling...

> Thanks,
> -Stolee

Thanks,
Taylor

Re: [PATCH] log: add log.excludeDecoration config option

[Derrick Stolee]

On 4/14/2020 11:45 AM, Taylor Blau wrote:
> On Tue, Apr 14, 2020 at 11:10:33AM -0400, Derrick Stolee wrote:
>>>>  log.follow::
>>>>  	If `true`, `git log` will act as if the `--follow` option was used when
>>>>  	a single <path> is given.  This has the same limitations as `--follow`,
>>>> diff --git a/builtin/log.c b/builtin/log.c
>>>> index 83a4a6188e2..d7d1d5b7143 100644
>>>> --- a/builtin/log.c
>>>> +++ b/builtin/log.c
>>>> @@ -236,7 +236,21 @@ static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
>>>>  	}
>>>>
>>>>  	if (decoration_style) {
>>>> +		const struct string_list *config_exclude =
>>>> +			repo_config_get_value_multi(the_repository,
>>>> +						    "log.excludeDecoration");
>>>> +
>>>> +		if (config_exclude) {
>>>> +			struct string_list_item *item;
>>>> +			for (item = config_exclude->items;
>>>> +			     item && item < config_exclude->items + config_exclude->nr;
>>>> +			     item++)
>>>
>>> Any reason not to use the 'for_each_string_list_item' macro in
>>> 'string-list.h' for this?
>>
>> The reason is I forgot about it.
> 
> Heh, in fairness I forgot about it, too :). I thought that this code
> looked familiar, but it was only luck that I had 'string-list.h' open at
> the time I was reading this.
> 
> I don't think that it really matters much each way, but if you're
> already re-rolling...

This is probably worth a re-roll on its own. I'll give the patch
some extra time to simmer before pushing a v2, though.

-Stolee

Re: [PATCH] log: add log.excludeDecoration config option

[Junio C Hamano]

"Derrick Stolee via GitGitGadget" <gitgitgadget@gmail.com> writes:

>  	if (decoration_style) {
> +		const struct string_list *config_exclude =
> +			repo_config_get_value_multi(the_repository,
> +						    "log.excludeDecoration");
> +
> +		if (config_exclude) {
> +			struct string_list_item *item;
> +			for (item = config_exclude->items;
> +			     item && item < config_exclude->items + config_exclude->nr;
> +			     item++)
> +				string_list_append(&decorate_refs_exclude,
> +						item->string);
> +		}
> +
>  		rev->show_decorations = 1;
> +
>  		load_ref_decorations(&decoration_filter, decoration_style);
>  	}

A few random thoughts.  Unlike my other usual reviews, please do not
take "should we do X" as a suggestion (these are purely me wondering
and nothing more at this point):

 * Given that we have command line options to specify what patterns
   to include as well as to exclude, it feels somewhat asymmetric to
   have only the configuration to exclude.  Should we also have a
   configuration for including?

 * The new code only adds to decorate_refs_exclude, which has the
   patterns that were given with the "--decorate-refs-exclude"
   command line option.  As refs.c:ref_filter_match() rejects
   anything that match an exclude pattern first before looking at
   the include patterns, there is no way to countermand what is
   configured to be excluded with the configuration from the command
   line, even with --decorate-refs" option.  Should we have a new
   command line option to "clear" the exclude list read from the
   configuration?  And if we add configuration for including for
   symmetry, should that be cleared as well?

 * As this is a multi-valued configuration, there probably are cases
   where you have configured three patterns, and for this single
   invocation you would want to override only one of them.  It might
   not be usable if the only way to override were to "clear" with a
   new option and then add two that you want from the command line.

What if we had (configured) exclusion for X, Y and Z, and then
allowed the command line to say "include Y", that would result in
the combination to specify exclusion of X and Z only?  Can we get
away by not having "include these" configuration at all, perhaps,
because "if there is no inclusion pattern, anything that does not
match exclusion patterns is included" is how the matcher works?

I guess the last one, despite what I said upfront, is the beginning
of my suggestion.  If we take the quoted change as-is, and then
before load_ref_decorations() uses the decoration_filter, perhaps we
can see for each pattern in the "exclude" list, if there is the same
entry in the "include" list, and remove it from both lists.  That
way, when the users wonder why their "git log" does not use certain
refs to decorate (let's say, you configured "refs/heads/*" in the
exclusion list), they can countermand by giving "--decorate-refs"
from the command line, perhaps?  It is still unclear to me how well
such a scheme works, e.g. how should patterns "refs/tags/*" and
"refs/tags/*-rc*" interact when they are given as configs and
options to include/exclude in various permutations, though.

Thanks.

Re: [PATCH] log: add log.excludeDecoration config option

[Derrick Stolee]

On 4/14/2020 1:19 PM, Junio C Hamano wrote:
> "Derrick Stolee via GitGitGadget" <gitgitgadget@gmail.com> writes:
> 
>>  	if (decoration_style) {
>> +		const struct string_list *config_exclude =
>> +			repo_config_get_value_multi(the_repository,
>> +						    "log.excludeDecoration");
>> +
>> +		if (config_exclude) {
>> +			struct string_list_item *item;
>> +			for (item = config_exclude->items;
>> +			     item && item < config_exclude->items + config_exclude->nr;
>> +			     item++)
>> +				string_list_append(&decorate_refs_exclude,
>> +						item->string);
>> +		}
>> +
>>  		rev->show_decorations = 1;
>> +
>>  		load_ref_decorations(&decoration_filter, decoration_style);
>>  	}
> 
> A few random thoughts.  Unlike my other usual reviews, please do not
> take "should we do X" as a suggestion (these are purely me wondering
> and nothing more at this point):
> 
>  * Given that we have command line options to specify what patterns
>    to include as well as to exclude, it feels somewhat asymmetric to
>    have only the configuration to exclude.  Should we also have a
>    configuration for including?

I left the other side out for simplicity and because I didn't know
the use case. It seems all refs are included by default.

>  * The new code only adds to decorate_refs_exclude, which has the
>    patterns that were given with the "--decorate-refs-exclude"
>    command line option.  As refs.c:ref_filter_match() rejects
>    anything that match an exclude pattern first before looking at
>    the include patterns, there is no way to countermand what is
>    configured to be excluded with the configuration from the command
>    line, even with --decorate-refs" option.  Should we have a new
>    command line option to "clear" the exclude list read from the
>    configuration?  And if we add configuration for including for
>    symmetry, should that be cleared as well?
>
>  * As this is a multi-valued configuration, there probably are cases
>    where you have configured three patterns, and for this single
>    invocation you would want to override only one of them.  It might
>    not be usable if the only way to override were to "clear" with a
>    new option and then add two that you want from the command line.
> 
> What if we had (configured) exclusion for X, Y and Z, and then
> allowed the command line to say "include Y", that would result in
> the combination to specify exclusion of X and Z only?  Can we get
> away by not having "include these" configuration at all, perhaps,
> because "if there is no inclusion pattern, anything that does not
> match exclusion patterns is included" is how the matcher works?

This is a very good point. We should be able to use command-line
options to override configured values. Something like this should
show decorations for refs/hidden/origin/master:

  git -c log.excludeDecoration=refs/hidden/* log --decorate-refs=refs/hidden/*

But, the current patch does not.
 
> I guess the last one, despite what I said upfront, is the beginning
> of my suggestion.  If we take the quoted change as-is, and then
> before load_ref_decorations() uses the decoration_filter, perhaps we
> can see for each pattern in the "exclude" list, if there is the same
> entry in the "include" list, and remove it from both lists.  That
> way, when the users wonder why their "git log" does not use certain
> refs to decorate (let's say, you configured "refs/heads/*" in the
> exclusion list), they can countermand by giving "--decorate-refs"
> from the command line, perhaps?  It is still unclear to me how well
> such a scheme works, e.g. how should patterns "refs/tags/*" and
> "refs/tags/*-rc*" interact when they are given as configs and
> options to include/exclude in various permutations, though.

My next version will allow this "overwrite" of configured values.
It seems like an important use case that I had missed.

Without getting into the code immediately, I predict the change
will be to include a second pass of "configured patterns" after
the command-line patterns. If the explicit command-line patterns
have already included the ref, then the configured exclude
patterns should not be tested.
 
Thanks!
-Stolee

Re: [PATCH] log: add log.excludeDecoration config option

[Junio C Hamano]

Derrick Stolee <stolee@gmail.com> writes:

>>  * Given that we have command line options to specify what patterns
>>    to include as well as to exclude, it feels somewhat asymmetric to
>>    have only the configuration to exclude.  Should we also have a
>>    configuration for including?
>
> I left the other side out for simplicity and because I didn't know
> the use case. It seems all refs are included by default.

It is a bit more subtle than that.  

Once you have an inclusion pattern, nothing is included by default.
Only the ones that match an inclusion pattern would be considered.
When there is no inclusion pattern, we behave as if there is a
match-all inclusion pattern.

Re: [PATCH] log: add log.excludeDecoration config option

[Derrick Stolee]

On 4/14/2020 2:10 PM, Junio C Hamano wrote:
> Derrick Stolee <stolee@gmail.com> writes:
> 
>>>  * Given that we have command line options to specify what patterns
>>>    to include as well as to exclude, it feels somewhat asymmetric to
>>>    have only the configuration to exclude.  Should we also have a
>>>    configuration for including?
>>
>> I left the other side out for simplicity and because I didn't know
>> the use case. It seems all refs are included by default.
> 
> It is a bit more subtle than that.  
> 
> Once you have an inclusion pattern, nothing is included by default.
> Only the ones that match an inclusion pattern would be considered.
> When there is no inclusion pattern, we behave as if there is a
> match-all inclusion pattern.

I did a quick check to verify how things currently work with
this diff:

diff --git a/t/t4202-log.sh b/t/t4202-log.sh
index b5de449e51..e9c9e59461 100755
--- a/t/t4202-log.sh
+++ b/t/t4202-log.sh
@@ -742,8 +742,24 @@ test_expect_success 'decorate-refs with glob' '
        octopus-a (octopus-a)
        reach
        EOF
+       cat >expect.no-decorate <<-\EOF &&
+       Merge-tag-reach
+       Merge-tags-octopus-a-and-octopus-b
+       seventh
+       octopus-b
+       octopus-a
+       reach
+       EOF
        git log -n6 --decorate=short --pretty="tformat:%f%d" \
                --decorate-refs="heads/octopus*" >actual &&
+       test_cmp expect.decorate actual &&
+       git log -n6 --decorate=short --pretty="tformat:%f%d" \
+               --decorate-refs-exclude="heads/octopus*" \
+               --decorate-refs="heads/octopus*" >actual &&
+       test_cmp expect.no-decorate actual &&
+       git -c log.excludeDecoration="heads/octopus*" log \
+               -n6 --decorate=short --pretty="tformat:%f%d" \
+               --decorate-refs="heads/octopus*" >actual &&
        test_cmp expect.decorate actual
 '

This test fails at the last test_cmp with the current
patch.

Note that if we have both --decorate-refs-exclude=X and
--decorate-refs=X, then the exclusion wins. This means that
we will need to split the "configured" exclusions from the
"command-line" exclusions and give them different priority.

But, I believe that if we can get this test to pass, then
we will have the correct inclusion/exclusion logic. I will
get started on this right now.

Thanks,
-Stolee

[PATCH v2] log: add log.excludeDecoration config option

[Derrick Stolee via GitGitGadget]

From: Derrick Stolee <dstolee@microsoft.com>

In 'git log', the --decorate-refs-exclude option appends a pattern
to a string_list. This list is used to prevent showing some refs
in the decoration output, or even by --simplify-by-decoration.

Users may want to use their refs space to store utility refs that
should not appear in the decoration output. For example, Scalar [1]
runs a background fetch but places the "new" refs inside the
refs/scalar/hidden/<remote>/* refspace instead of refs/<remote>/*
to avoid updating remote refs when the user is not looking. However,
these "hidden" refs appear during regular 'git log' queries.

A similar idea to use "hidden" refs is under consideration for core
Git [2].

Add the 'log.excludeDecoration' config option so users can exclude
some refs from decorations by default instead of needing to use
--decorate-refs-exclude manually. The config value is multi-valued
much like the command-line option. The documentation is careful to
point out that the config value can be overridden by the
--decorate-refs option, even though --decorate-refs-exclude would
always "win" over --decorate-refs.

Since the 'log.excludeDecoration' takes lower precedence to
--decorate-refs, and --decorate-refs-exclude takes higher
precedence, the struct decoration_filter needed another field.
This led also to new logic in load_ref_decorations() and
ref_filter_match().

There are several tests in t4202-log.sh that test the
--decorate-refs-(include|exclude) options, so these are extended.
Since the expected output is already stored as a file, most tests
could simply replace a "--decorate-refs-exclude" option with an
in-line config setting. Other tests involve the precedence of
the config option compared to command-line options and needed more
modification.

[1] https://github.com/microsoft/scalar
[2] https://lore.kernel.org/git/77b1da5d3063a2404cd750adfe3bb8be9b6c497d.1585946894.git.gitgitgadget@gmail.com/

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
---
    log: add log.excludeDecoration config option
    
    This was something hinted at in the "fetch" step of the background
    maintenance RFC. Should be a relatively minor addition to our config
    options.
    
    We definitely want this feature for microsoft/git (we would set
    log.excludeDecoration=refs/scalar/* in all Scalar repos), but we will
    wait for feedback from the community.
    
    Updates in v2:
    
     * Use for_each_string_list_item()
       
       
     * Update the matching logic to allow --decorate-refs to override the
       config option.
       
       
    
    Thanks, -Stolee

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-610%2Fderrickstolee%2Flog-exclude-decoration-v2
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-610/derrickstolee/log-exclude-decoration-v2
Pull-Request: https://github.com/gitgitgadget/git/pull/610

Range-diff vs v1:

 1:  6aa81243c1f ! 1:  cbdaef4a8e1 log: add log.excludeDecoration config option
     @@ Commit message
          Add the 'log.excludeDecoration' config option so users can exclude
          some refs from decorations by default instead of needing to use
          --decorate-refs-exclude manually. The config value is multi-valued
     -    much like the command-line option.
     +    much like the command-line option. The documentation is careful to
     +    point out that the config value can be overridden by the
     +    --decorate-refs option, even though --decorate-refs-exclude would
     +    always "win" over --decorate-refs.
     +
     +    Since the 'log.excludeDecoration' takes lower precedence to
     +    --decorate-refs, and --decorate-refs-exclude takes higher
     +    precedence, the struct decoration_filter needed another field.
     +    This led also to new logic in load_ref_decorations() and
     +    ref_filter_match().
      
          There are several tests in t4202-log.sh that test the
          --decorate-refs-(include|exclude) options, so these are extended.
     -    Since the expected output is already stored as a file, simply add
     -    new calls that replace a "--decorate-refs-exclude" option with an
     -    in-line config setting.
     +    Since the expected output is already stored as a file, most tests
     +    could simply replace a "--decorate-refs-exclude" option with an
     +    in-line config setting. Other tests involve the precedence of
     +    the config option compared to command-line options and needed more
     +    modification.
      
          [1] https://github.com/microsoft/scalar
          [2] https://lore.kernel.org/git/77b1da5d3063a2404cd750adfe3bb8be9b6c497d.1585946894.git.gitgitgadget@gmail.com/
     @@ Documentation/config/log.txt: log.decorate::
       	If `true`, `git log` will act as if the `--follow` option was used when
       	a single <path> is given.  This has the same limitations as `--follow`,
      
     + ## Documentation/git-log.txt ##
     +@@ Documentation/git-log.txt: OPTIONS
     + 	If no `--decorate-refs` is given, pretend as if all refs were
     + 	included.  For each candidate, do not use it for decoration if it
     + 	matches any patterns given to `--decorate-refs-exclude` or if it
     +-	doesn't match any of the patterns given to `--decorate-refs`.
     ++	doesn't match any of the patterns given to `--decorate-refs`. The
     ++	`log.excludeDecoration` config option allows excluding refs from
     ++	the decorations, but an explicit `--decorate-refs` pattern will
     ++	override a match in `log.excludeDecoration`.
     + 
     + --source::
     + 	Print out the ref name given on the command line by which each
     +
       ## builtin/log.c ##
     +@@ builtin/log.c: static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
     + 	int quiet = 0, source = 0, mailmap;
     + 	static struct line_opt_callback_data line_cb = {NULL, NULL, STRING_LIST_INIT_DUP};
     + 	static struct string_list decorate_refs_exclude = STRING_LIST_INIT_NODUP;
     ++	static struct string_list decorate_refs_exclude_config = STRING_LIST_INIT_NODUP;
     + 	static struct string_list decorate_refs_include = STRING_LIST_INIT_NODUP;
     + 	struct decoration_filter decoration_filter = {&decorate_refs_include,
     +-						      &decorate_refs_exclude};
     ++						      &decorate_refs_exclude,
     ++						      &decorate_refs_exclude_config};
     + 	static struct revision_sources revision_sources;
     + 
     + 	const struct option builtin_log_options[] = {
      @@ builtin/log.c: static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
       	}
       
     @@ builtin/log.c: static void cmd_log_init_finish(int argc, const char **argv, cons
      +
      +		if (config_exclude) {
      +			struct string_list_item *item;
     -+			for (item = config_exclude->items;
     -+			     item && item < config_exclude->items + config_exclude->nr;
     -+			     item++)
     -+				string_list_append(&decorate_refs_exclude,
     -+						item->string);
     ++			for_each_string_list_item(item, config_exclude)
     ++				string_list_append(&decorate_refs_exclude_config,
     ++						   item->string);
      +		}
      +
       		rev->show_decorations = 1;
     @@ builtin/log.c: static void cmd_log_init_finish(int argc, const char **argv, cons
       	}
       
      
     + ## log-tree.c ##
     +@@ log-tree.c: static int add_ref_decoration(const char *refname, const struct object_id *oid,
     + 
     + 	if (filter && !ref_filter_match(refname,
     + 			      filter->include_ref_pattern,
     +-			      filter->exclude_ref_pattern))
     ++			      filter->exclude_ref_pattern,
     ++			      filter->exclude_ref_config_pattern))
     + 		return 0;
     + 
     + 	if (starts_with(refname, git_replace_ref_base)) {
     +@@ log-tree.c: void load_ref_decorations(struct decoration_filter *filter, int flags)
     + 			for_each_string_list_item(item, filter->include_ref_pattern) {
     + 				normalize_glob_ref(item, NULL, item->string);
     + 			}
     ++			for_each_string_list_item(item, filter->exclude_ref_config_pattern) {
     ++				normalize_glob_ref(item, NULL, item->string);
     ++			}
     + 		}
     + 		decoration_loaded = 1;
     + 		decoration_flags = flags;
     +
     + ## log-tree.h ##
     +@@ log-tree.h: struct log_info {
     + };
     + 
     + struct decoration_filter {
     +-	struct string_list *include_ref_pattern, *exclude_ref_pattern;
     ++	struct string_list *include_ref_pattern;
     ++	struct string_list *exclude_ref_pattern;
     ++	struct string_list *exclude_ref_config_pattern;
     + };
     + 
     + int parse_decorate_color_config(const char *var, const char *slot_name, const char *value);
     +
     + ## refs.c ##
     +@@ refs.c: static int match_ref_pattern(const char *refname,
     + 
     + int ref_filter_match(const char *refname,
     + 		     const struct string_list *include_patterns,
     +-		     const struct string_list *exclude_patterns)
     ++		     const struct string_list *exclude_patterns,
     ++		     const struct string_list *exclude_patterns_config)
     + {
     + 	struct string_list_item *item;
     ++	int found = 0;
     + 
     + 	if (exclude_patterns && exclude_patterns->nr) {
     + 		for_each_string_list_item(item, exclude_patterns) {
     +@@ refs.c: int ref_filter_match(const char *refname,
     + 	}
     + 
     + 	if (include_patterns && include_patterns->nr) {
     +-		int found = 0;
     + 		for_each_string_list_item(item, include_patterns) {
     + 			if (match_ref_pattern(refname, item)) {
     + 				found = 1;
     +@@ refs.c: int ref_filter_match(const char *refname,
     + 		if (!found)
     + 			return 0;
     + 	}
     ++
     ++	if (!found &&
     ++	    exclude_patterns_config &&
     ++	    exclude_patterns_config->nr) {
     ++		for_each_string_list_item(item, exclude_patterns_config) {
     ++			if (match_ref_pattern(refname, item))
     ++				return 0;
     ++		}
     ++	}
     ++
     + 	return 1;
     + }
     + 
     +
     + ## refs.h ##
     +@@ refs.h: void normalize_glob_ref(struct string_list_item *item, const char *prefix,
     + 			const char *pattern);
     + 
     + /*
     +- * Returns 0 if refname matches any of the exclude_patterns, or if it doesn't
     +- * match any of the include_patterns. Returns 1 otherwise.
     ++ * Returns 0 if the refname matches any of the exclude_patterns.
     ++ *
     ++ * Returns 0 if include_patterns is non-empty but refname does not match
     ++ * any of those patterns.
     ++ *
     ++ * Returns 0 if refname matches a pattern in exclude_patterns_config but
     ++ * does not match any pattern in inclue_patterns.
     ++ *
     ++ * Otherwise, returns 1.
     +  *
     +- * If pattern list is NULL or empty, matching against that list is skipped.
     +  * This has the effect of matching everything by default, unless the user
     +  * specifies rules otherwise.
     +  */
     + int ref_filter_match(const char *refname,
     + 		     const struct string_list *include_patterns,
     +-		     const struct string_list *exclude_patterns);
     ++		     const struct string_list *exclude_patterns,
     ++		     const struct string_list *exclude_patterns_config);
     + 
     + static inline const char *has_glob_specials(const char *pattern)
     + {
     +
       ## t/t4202-log.sh ##
     +@@ t/t4202-log.sh: test_expect_success 'decorate-refs with glob' '
     + 	octopus-a (octopus-a)
     + 	reach
     + 	EOF
     ++	cat >expect.no-decorate <<-\EOF &&
     ++	Merge-tag-reach
     ++	Merge-tags-octopus-a-and-octopus-b
     ++	seventh
     ++	octopus-b
     ++	octopus-a
     ++	reach
     ++	EOF
     ++	git log -n6 --decorate=short --pretty="tformat:%f%d" \
     ++		--decorate-refs="heads/octopus*" >actual &&
     ++	test_cmp expect.decorate actual &&
     + 	git log -n6 --decorate=short --pretty="tformat:%f%d" \
     ++		--decorate-refs-exclude="heads/octopus*" \
     ++		--decorate-refs="heads/octopus*" >actual &&
     ++	test_cmp expect.no-decorate actual &&
     ++	git -c log.excludeDecoration="heads/octopus*" log \
     ++		-n6 --decorate=short --pretty="tformat:%f%d" \
     + 		--decorate-refs="heads/octopus*" >actual &&
     + 	test_cmp expect.decorate actual
     + '
      @@ t/t4202-log.sh: test_expect_success 'decorate-refs-exclude with glob' '
       	EOF
       	git log -n6 --decorate=short --pretty="tformat:%f%d" \
     @@ t/t4202-log.sh: test_expect_success 'multiple decorate-refs-exclude' '
       	test_cmp expect.decorate actual
       '
       
     + test_expect_success 'decorate-refs and decorate-refs-exclude' '
     +-	cat >expect.decorate <<-\EOF &&
     ++	cat >expect.no-decorate <<-\EOF &&
     + 	Merge-tag-reach (master)
     + 	Merge-tags-octopus-a-and-octopus-b
     + 	seventh
      @@ t/t4202-log.sh: test_expect_success 'decorate-refs and decorate-refs-exclude' '
       	git log -n6 --decorate=short --pretty="tformat:%f%d" \
       		--decorate-refs="heads/*" \
       		--decorate-refs-exclude="heads/oc*" >actual &&
     -+	test_cmp expect.decorate actual &&
     ++	test_cmp expect.no-decorate actual
     ++'
     ++
     ++test_expect_success 'deocrate-refs and log.excludeDecoration' '
     ++	cat >expect.decorate <<-\EOF &&
     ++	Merge-tag-reach (master)
     ++	Merge-tags-octopus-a-and-octopus-b
     ++	seventh
     ++	octopus-b (octopus-b)
     ++	octopus-a (octopus-a)
     ++	reach (reach)
     ++	EOF
      +	git -c log.excludeDecoration="heads/oc*" log \
      +		--decorate-refs="heads/*" \
      +		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&


 Documentation/config/log.txt |  5 ++++
 Documentation/git-log.txt    |  5 +++-
 builtin/log.c                | 16 ++++++++++-
 log-tree.c                   |  6 ++++-
 log-tree.h                   |  4 ++-
 refs.c                       | 15 +++++++++--
 refs.h                       | 15 ++++++++---
 t/t4202-log.sh               | 51 +++++++++++++++++++++++++++++++++++-
 8 files changed, 106 insertions(+), 11 deletions(-)

diff --git a/Documentation/config/log.txt b/Documentation/config/log.txt
index e9e1e397f3f..1a158324f79 100644
--- a/Documentation/config/log.txt
+++ b/Documentation/config/log.txt
@@ -18,6 +18,11 @@ log.decorate::
 	names are shown. This is the same as the `--decorate` option
 	of the `git log`.
 
+log.excludeDecoration::
+	Exclude the specified patterns from the log decorations. This multi-
+	valued config option is the same as the `--decorate-refs-exclude`
+	option of `git log`.
+
 log.follow::
 	If `true`, `git log` will act as if the `--follow` option was used when
 	a single <path> is given.  This has the same limitations as `--follow`,
diff --git a/Documentation/git-log.txt b/Documentation/git-log.txt
index bed09bb09e5..17592234ba4 100644
--- a/Documentation/git-log.txt
+++ b/Documentation/git-log.txt
@@ -43,7 +43,10 @@ OPTIONS
 	If no `--decorate-refs` is given, pretend as if all refs were
 	included.  For each candidate, do not use it for decoration if it
 	matches any patterns given to `--decorate-refs-exclude` or if it
-	doesn't match any of the patterns given to `--decorate-refs`.
+	doesn't match any of the patterns given to `--decorate-refs`. The
+	`log.excludeDecoration` config option allows excluding refs from
+	the decorations, but an explicit `--decorate-refs` pattern will
+	override a match in `log.excludeDecoration`.
 
 --source::
 	Print out the ref name given on the command line by which each
diff --git a/builtin/log.c b/builtin/log.c
index 83a4a6188e2..72192710dcd 100644
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -164,9 +164,11 @@ static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
 	int quiet = 0, source = 0, mailmap;
 	static struct line_opt_callback_data line_cb = {NULL, NULL, STRING_LIST_INIT_DUP};
 	static struct string_list decorate_refs_exclude = STRING_LIST_INIT_NODUP;
+	static struct string_list decorate_refs_exclude_config = STRING_LIST_INIT_NODUP;
 	static struct string_list decorate_refs_include = STRING_LIST_INIT_NODUP;
 	struct decoration_filter decoration_filter = {&decorate_refs_include,
-						      &decorate_refs_exclude};
+						      &decorate_refs_exclude,
+						      &decorate_refs_exclude_config};
 	static struct revision_sources revision_sources;
 
 	const struct option builtin_log_options[] = {
@@ -236,7 +238,19 @@ static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
 	}
 
 	if (decoration_style) {
+		const struct string_list *config_exclude =
+			repo_config_get_value_multi(the_repository,
+						    "log.excludeDecoration");
+
+		if (config_exclude) {
+			struct string_list_item *item;
+			for_each_string_list_item(item, config_exclude)
+				string_list_append(&decorate_refs_exclude_config,
+						   item->string);
+		}
+
 		rev->show_decorations = 1;
+
 		load_ref_decorations(&decoration_filter, decoration_style);
 	}
 
diff --git a/log-tree.c b/log-tree.c
index 52127427ffe..bd8d4c07bb8 100644
--- a/log-tree.c
+++ b/log-tree.c
@@ -90,7 +90,8 @@ static int add_ref_decoration(const char *refname, const struct object_id *oid,
 
 	if (filter && !ref_filter_match(refname,
 			      filter->include_ref_pattern,
-			      filter->exclude_ref_pattern))
+			      filter->exclude_ref_pattern,
+			      filter->exclude_ref_config_pattern))
 		return 0;
 
 	if (starts_with(refname, git_replace_ref_base)) {
@@ -155,6 +156,9 @@ void load_ref_decorations(struct decoration_filter *filter, int flags)
 			for_each_string_list_item(item, filter->include_ref_pattern) {
 				normalize_glob_ref(item, NULL, item->string);
 			}
+			for_each_string_list_item(item, filter->exclude_ref_config_pattern) {
+				normalize_glob_ref(item, NULL, item->string);
+			}
 		}
 		decoration_loaded = 1;
 		decoration_flags = flags;
diff --git a/log-tree.h b/log-tree.h
index e6686280746..8fa79289ec6 100644
--- a/log-tree.h
+++ b/log-tree.h
@@ -8,7 +8,9 @@ struct log_info {
 };
 
 struct decoration_filter {
-	struct string_list *include_ref_pattern, *exclude_ref_pattern;
+	struct string_list *include_ref_pattern;
+	struct string_list *exclude_ref_pattern;
+	struct string_list *exclude_ref_config_pattern;
 };
 
 int parse_decorate_color_config(const char *var, const char *slot_name, const char *value);
diff --git a/refs.c b/refs.c
index 1ab0bb54d3d..63d8b569333 100644
--- a/refs.c
+++ b/refs.c
@@ -339,9 +339,11 @@ static int match_ref_pattern(const char *refname,
 
 int ref_filter_match(const char *refname,
 		     const struct string_list *include_patterns,
-		     const struct string_list *exclude_patterns)
+		     const struct string_list *exclude_patterns,
+		     const struct string_list *exclude_patterns_config)
 {
 	struct string_list_item *item;
+	int found = 0;
 
 	if (exclude_patterns && exclude_patterns->nr) {
 		for_each_string_list_item(item, exclude_patterns) {
@@ -351,7 +353,6 @@ int ref_filter_match(const char *refname,
 	}
 
 	if (include_patterns && include_patterns->nr) {
-		int found = 0;
 		for_each_string_list_item(item, include_patterns) {
 			if (match_ref_pattern(refname, item)) {
 				found = 1;
@@ -362,6 +363,16 @@ int ref_filter_match(const char *refname,
 		if (!found)
 			return 0;
 	}
+
+	if (!found &&
+	    exclude_patterns_config &&
+	    exclude_patterns_config->nr) {
+		for_each_string_list_item(item, exclude_patterns_config) {
+			if (match_ref_pattern(refname, item))
+				return 0;
+		}
+	}
+
 	return 1;
 }
 
diff --git a/refs.h b/refs.h
index 545029c6d80..7cec33303d7 100644
--- a/refs.h
+++ b/refs.h
@@ -362,16 +362,23 @@ void normalize_glob_ref(struct string_list_item *item, const char *prefix,
 			const char *pattern);
 
 /*
- * Returns 0 if refname matches any of the exclude_patterns, or if it doesn't
- * match any of the include_patterns. Returns 1 otherwise.
+ * Returns 0 if the refname matches any of the exclude_patterns.
+ *
+ * Returns 0 if include_patterns is non-empty but refname does not match
+ * any of those patterns.
+ *
+ * Returns 0 if refname matches a pattern in exclude_patterns_config but
+ * does not match any pattern in inclue_patterns.
+ *
+ * Otherwise, returns 1.
  *
- * If pattern list is NULL or empty, matching against that list is skipped.
  * This has the effect of matching everything by default, unless the user
  * specifies rules otherwise.
  */
 int ref_filter_match(const char *refname,
 		     const struct string_list *include_patterns,
-		     const struct string_list *exclude_patterns);
+		     const struct string_list *exclude_patterns,
+		     const struct string_list *exclude_patterns_config);
 
 static inline const char *has_glob_specials(const char *pattern)
 {
diff --git a/t/t4202-log.sh b/t/t4202-log.sh
index 0f766ba65f5..78f9ade6870 100755
--- a/t/t4202-log.sh
+++ b/t/t4202-log.sh
@@ -742,7 +742,23 @@ test_expect_success 'decorate-refs with glob' '
 	octopus-a (octopus-a)
 	reach
 	EOF
+	cat >expect.no-decorate <<-\EOF &&
+	Merge-tag-reach
+	Merge-tags-octopus-a-and-octopus-b
+	seventh
+	octopus-b
+	octopus-a
+	reach
+	EOF
+	git log -n6 --decorate=short --pretty="tformat:%f%d" \
+		--decorate-refs="heads/octopus*" >actual &&
+	test_cmp expect.decorate actual &&
 	git log -n6 --decorate=short --pretty="tformat:%f%d" \
+		--decorate-refs-exclude="heads/octopus*" \
+		--decorate-refs="heads/octopus*" >actual &&
+	test_cmp expect.no-decorate actual &&
+	git -c log.excludeDecoration="heads/octopus*" log \
+		-n6 --decorate=short --pretty="tformat:%f%d" \
 		--decorate-refs="heads/octopus*" >actual &&
 	test_cmp expect.decorate actual
 '
@@ -787,6 +803,9 @@ test_expect_success 'decorate-refs-exclude with glob' '
 	EOF
 	git log -n6 --decorate=short --pretty="tformat:%f%d" \
 		--decorate-refs-exclude="heads/octopus*" >actual &&
+	test_cmp expect.decorate actual &&
+	git -c log.excludeDecoration="heads/octopus*" log \
+		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
 	test_cmp expect.decorate actual
 '
 
@@ -801,6 +820,9 @@ test_expect_success 'decorate-refs-exclude without globs' '
 	EOF
 	git log -n6 --decorate=short --pretty="tformat:%f%d" \
 		--decorate-refs-exclude="tags/reach" >actual &&
+	test_cmp expect.decorate actual &&
+	git -c log.excludeDecoration="tags/reach" log \
+		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
 	test_cmp expect.decorate actual
 '
 
@@ -816,11 +838,19 @@ test_expect_success 'multiple decorate-refs-exclude' '
 	git log -n6 --decorate=short --pretty="tformat:%f%d" \
 		--decorate-refs-exclude="heads/octopus*" \
 		--decorate-refs-exclude="tags/reach" >actual &&
+	test_cmp expect.decorate actual &&
+	git -c log.excludeDecoration="heads/octopus*" \
+		-c log.excludeDecoration="tags/reach" log \
+		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
+	test_cmp expect.decorate actual &&
+	git -c log.excludeDecoration="heads/octopus*" log \
+		--decorate-refs-exclude="tags/reach" \
+		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
 	test_cmp expect.decorate actual
 '
 
 test_expect_success 'decorate-refs and decorate-refs-exclude' '
-	cat >expect.decorate <<-\EOF &&
+	cat >expect.no-decorate <<-\EOF &&
 	Merge-tag-reach (master)
 	Merge-tags-octopus-a-and-octopus-b
 	seventh
@@ -831,6 +861,21 @@ test_expect_success 'decorate-refs and decorate-refs-exclude' '
 	git log -n6 --decorate=short --pretty="tformat:%f%d" \
 		--decorate-refs="heads/*" \
 		--decorate-refs-exclude="heads/oc*" >actual &&
+	test_cmp expect.no-decorate actual
+'
+
+test_expect_success 'deocrate-refs and log.excludeDecoration' '
+	cat >expect.decorate <<-\EOF &&
+	Merge-tag-reach (master)
+	Merge-tags-octopus-a-and-octopus-b
+	seventh
+	octopus-b (octopus-b)
+	octopus-a (octopus-a)
+	reach (reach)
+	EOF
+	git -c log.excludeDecoration="heads/oc*" log \
+		--decorate-refs="heads/*" \
+		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
 	test_cmp expect.decorate actual
 '
 
@@ -846,6 +891,10 @@ test_expect_success 'decorate-refs-exclude and simplify-by-decoration' '
 	git log -n6 --decorate=short --pretty="tformat:%f%d" \
 		--decorate-refs-exclude="*octopus*" \
 		--simplify-by-decoration >actual &&
+	test_cmp expect.decorate actual &&
+	git -c log.excludeDecoration="*octopus*" log \
+		-n6 --decorate=short --pretty="tformat:%f%d" \
+		--simplify-by-decoration >actual &&
 	test_cmp expect.decorate actual
 '
 

base-commit: 274b9cc25322d9ee79aa8e6d4e86f0ffe5ced925
-- 
gitgitgadget

Re: [PATCH v2] log: add log.excludeDecoration config option

[Taylor Blau]

Hi Stolee,

On Wed, Apr 15, 2020 at 03:44:22PM +0000, Derrick Stolee via GitGitGadget wrote:
> From: Derrick Stolee <dstolee@microsoft.com>
>
> In 'git log', the --decorate-refs-exclude option appends a pattern
> to a string_list. This list is used to prevent showing some refs
> in the decoration output, or even by --simplify-by-decoration.
>
> Users may want to use their refs space to store utility refs that
> should not appear in the decoration output. For example, Scalar [1]
> runs a background fetch but places the "new" refs inside the
> refs/scalar/hidden/<remote>/* refspace instead of refs/<remote>/*
> to avoid updating remote refs when the user is not looking. However,
> these "hidden" refs appear during regular 'git log' queries.
>
> A similar idea to use "hidden" refs is under consideration for core
> Git [2].
>
> Add the 'log.excludeDecoration' config option so users can exclude
> some refs from decorations by default instead of needing to use
> --decorate-refs-exclude manually. The config value is multi-valued
> much like the command-line option. The documentation is careful to
> point out that the config value can be overridden by the
> --decorate-refs option, even though --decorate-refs-exclude would
> always "win" over --decorate-refs.
>
> Since the 'log.excludeDecoration' takes lower precedence to
> --decorate-refs, and --decorate-refs-exclude takes higher
> precedence, the struct decoration_filter needed another field.
> This led also to new logic in load_ref_decorations() and
> ref_filter_match().
>
> There are several tests in t4202-log.sh that test the
> --decorate-refs-(include|exclude) options, so these are extended.
> Since the expected output is already stored as a file, most tests
> could simply replace a "--decorate-refs-exclude" option with an
> in-line config setting. Other tests involve the precedence of
> the config option compared to command-line options and needed more
> modification.
>
> [1] https://github.com/microsoft/scalar
> [2] https://lore.kernel.org/git/77b1da5d3063a2404cd750adfe3bb8be9b6c497d.1585946894.git.gitgitgadget@gmail.com/
>
> Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
> ---
>     log: add log.excludeDecoration config option
>
>     This was something hinted at in the "fetch" step of the background
>     maintenance RFC. Should be a relatively minor addition to our config
>     options.
>
>     We definitely want this feature for microsoft/git (we would set
>     log.excludeDecoration=refs/scalar/* in all Scalar repos), but we will
>     wait for feedback from the community.
>
>     Updates in v2:
>
>      * Use for_each_string_list_item()
>
>
>      * Update the matching logic to allow --decorate-refs to override the
>        config option.
>
>
>
>     Thanks, -Stolee

Thanks for a v2, Stolee.

> Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-610%2Fderrickstolee%2Flog-exclude-decoration-v2
> Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-610/derrickstolee/log-exclude-decoration-v2
> Pull-Request: https://github.com/gitgitgadget/git/pull/610
>
> [ snip range-diff ... ]
>
>  Documentation/config/log.txt |  5 ++++
>  Documentation/git-log.txt    |  5 +++-
>  builtin/log.c                | 16 ++++++++++-
>  log-tree.c                   |  6 ++++-
>  log-tree.h                   |  4 ++-
>  refs.c                       | 15 +++++++++--
>  refs.h                       | 15 ++++++++---
>  t/t4202-log.sh               | 51 +++++++++++++++++++++++++++++++++++-
>  8 files changed, 106 insertions(+), 11 deletions(-)
>
> diff --git a/Documentation/config/log.txt b/Documentation/config/log.txt
> index e9e1e397f3f..1a158324f79 100644
> --- a/Documentation/config/log.txt
> +++ b/Documentation/config/log.txt
> @@ -18,6 +18,11 @@ log.decorate::
>  	names are shown. This is the same as the `--decorate` option
>  	of the `git log`.
>
> +log.excludeDecoration::
> +	Exclude the specified patterns from the log decorations. This multi-
> +	valued config option is the same as the `--decorate-refs-exclude`
> +	option of `git log`.
> +

Good, I'm glad that you didn't change this from v1, since I figure the
interaction with 'git log' should be explained in 'git log's man page,
not this one. Nice.

>  log.follow::
>  	If `true`, `git log` will act as if the `--follow` option was used when
>  	a single <path> is given.  This has the same limitations as `--follow`,
> diff --git a/Documentation/git-log.txt b/Documentation/git-log.txt
> index bed09bb09e5..17592234ba4 100644
> --- a/Documentation/git-log.txt
> +++ b/Documentation/git-log.txt
> @@ -43,7 +43,10 @@ OPTIONS
>  	If no `--decorate-refs` is given, pretend as if all refs were
>  	included.  For each candidate, do not use it for decoration if it
>  	matches any patterns given to `--decorate-refs-exclude` or if it
> -	doesn't match any of the patterns given to `--decorate-refs`.
> +	doesn't match any of the patterns given to `--decorate-refs`. The
> +	`log.excludeDecoration` config option allows excluding refs from
> +	the decorations, but an explicit `--decorate-refs` pattern will
> +	override a match in `log.excludeDecoration`.
>
>  --source::
>  	Print out the ref name given on the command line by which each
> diff --git a/builtin/log.c b/builtin/log.c
> index 83a4a6188e2..72192710dcd 100644
> --- a/builtin/log.c
> +++ b/builtin/log.c
> @@ -164,9 +164,11 @@ static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
>  	int quiet = 0, source = 0, mailmap;
>  	static struct line_opt_callback_data line_cb = {NULL, NULL, STRING_LIST_INIT_DUP};
>  	static struct string_list decorate_refs_exclude = STRING_LIST_INIT_NODUP;
> +	static struct string_list decorate_refs_exclude_config = STRING_LIST_INIT_NODUP;
>  	static struct string_list decorate_refs_include = STRING_LIST_INIT_NODUP;
>  	struct decoration_filter decoration_filter = {&decorate_refs_include,
> -						      &decorate_refs_exclude};
> +						      &decorate_refs_exclude,
> +						      &decorate_refs_exclude_config};
>  	static struct revision_sources revision_sources;
>
>  	const struct option builtin_log_options[] = {
> @@ -236,7 +238,19 @@ static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
>  	}
>
>  	if (decoration_style) {
> +		const struct string_list *config_exclude =
> +			repo_config_get_value_multi(the_repository,
> +						    "log.excludeDecoration");
> +
> +		if (config_exclude) {
> +			struct string_list_item *item;
> +			for_each_string_list_item(item, config_exclude)
> +				string_list_append(&decorate_refs_exclude_config,
> +						   item->string);
> +		}
> +
>  		rev->show_decorations = 1;
> +
>  		load_ref_decorations(&decoration_filter, decoration_style);
>  	}
>
> diff --git a/log-tree.c b/log-tree.c
> index 52127427ffe..bd8d4c07bb8 100644
> --- a/log-tree.c
> +++ b/log-tree.c
> @@ -90,7 +90,8 @@ static int add_ref_decoration(const char *refname, const struct object_id *oid,
>
>  	if (filter && !ref_filter_match(refname,
>  			      filter->include_ref_pattern,
> -			      filter->exclude_ref_pattern))
> +			      filter->exclude_ref_pattern,
> +			      filter->exclude_ref_config_pattern))
>  		return 0;
>
>  	if (starts_with(refname, git_replace_ref_base)) {
> @@ -155,6 +156,9 @@ void load_ref_decorations(struct decoration_filter *filter, int flags)
>  			for_each_string_list_item(item, filter->include_ref_pattern) {
>  				normalize_glob_ref(item, NULL, item->string);
>  			}
> +			for_each_string_list_item(item, filter->exclude_ref_config_pattern) {
> +				normalize_glob_ref(item, NULL, item->string);
> +			}
>  		}
>  		decoration_loaded = 1;
>  		decoration_flags = flags;
> diff --git a/log-tree.h b/log-tree.h
> index e6686280746..8fa79289ec6 100644
> --- a/log-tree.h
> +++ b/log-tree.h
> @@ -8,7 +8,9 @@ struct log_info {
>  };
>
>  struct decoration_filter {
> -	struct string_list *include_ref_pattern, *exclude_ref_pattern;
> +	struct string_list *include_ref_pattern;
> +	struct string_list *exclude_ref_pattern;
> +	struct string_list *exclude_ref_config_pattern;
>  };
>
>  int parse_decorate_color_config(const char *var, const char *slot_name, const char *value);
> diff --git a/refs.c b/refs.c
> index 1ab0bb54d3d..63d8b569333 100644
> --- a/refs.c
> +++ b/refs.c
> @@ -339,9 +339,11 @@ static int match_ref_pattern(const char *refname,
>
>  int ref_filter_match(const char *refname,
>  		     const struct string_list *include_patterns,
> -		     const struct string_list *exclude_patterns)
> +		     const struct string_list *exclude_patterns,
> +		     const struct string_list *exclude_patterns_config)
>  {
>  	struct string_list_item *item;
> +	int found = 0;
>
>  	if (exclude_patterns && exclude_patterns->nr) {
>  		for_each_string_list_item(item, exclude_patterns) {
> @@ -351,7 +353,6 @@ int ref_filter_match(const char *refname,
>  	}
>
>  	if (include_patterns && include_patterns->nr) {
> -		int found = 0;
>  		for_each_string_list_item(item, include_patterns) {
>  			if (match_ref_pattern(refname, item)) {
>  				found = 1;
> @@ -362,6 +363,16 @@ int ref_filter_match(const char *refname,
>  		if (!found)
>  			return 0;
>  	}
> +
> +	if (!found &&
> +	    exclude_patterns_config &&
> +	    exclude_patterns_config->nr) {
> +		for_each_string_list_item(item, exclude_patterns_config) {
> +			if (match_ref_pattern(refname, item))
> +				return 0;
> +		}
> +	}
> +
>  	return 1;
>  }
>
> diff --git a/refs.h b/refs.h
> index 545029c6d80..7cec33303d7 100644
> --- a/refs.h
> +++ b/refs.h
> @@ -362,16 +362,23 @@ void normalize_glob_ref(struct string_list_item *item, const char *prefix,
>  			const char *pattern);
>
>  /*
> - * Returns 0 if refname matches any of the exclude_patterns, or if it doesn't
> - * match any of the include_patterns. Returns 1 otherwise.
> + * Returns 0 if the refname matches any of the exclude_patterns.
> + *
> + * Returns 0 if include_patterns is non-empty but refname does not match
> + * any of those patterns.
> + *
> + * Returns 0 if refname matches a pattern in exclude_patterns_config but
> + * does not match any pattern in inclue_patterns.
> + *
> + * Otherwise, returns 1.
>   *
> - * If pattern list is NULL or empty, matching against that list is skipped.
>   * This has the effect of matching everything by default, unless the user
>   * specifies rules otherwise.
>   */
>  int ref_filter_match(const char *refname,
>  		     const struct string_list *include_patterns,
> -		     const struct string_list *exclude_patterns);
> +		     const struct string_list *exclude_patterns,
> +		     const struct string_list *exclude_patterns_config);
>
>  static inline const char *has_glob_specials(const char *pattern)
>  {
> diff --git a/t/t4202-log.sh b/t/t4202-log.sh
> index 0f766ba65f5..78f9ade6870 100755
> --- a/t/t4202-log.sh
> +++ b/t/t4202-log.sh
> @@ -742,7 +742,23 @@ test_expect_success 'decorate-refs with glob' '
>  	octopus-a (octopus-a)
>  	reach
>  	EOF
> +	cat >expect.no-decorate <<-\EOF &&
> +	Merge-tag-reach
> +	Merge-tags-octopus-a-and-octopus-b
> +	seventh
> +	octopus-b
> +	octopus-a
> +	reach
> +	EOF
> +	git log -n6 --decorate=short --pretty="tformat:%f%d" \
> +		--decorate-refs="heads/octopus*" >actual &&
> +	test_cmp expect.decorate actual &&
>  	git log -n6 --decorate=short --pretty="tformat:%f%d" \
> +		--decorate-refs-exclude="heads/octopus*" \
> +		--decorate-refs="heads/octopus*" >actual &&
> +	test_cmp expect.no-decorate actual &&
> +	git -c log.excludeDecoration="heads/octopus*" log \
> +		-n6 --decorate=short --pretty="tformat:%f%d" \
>  		--decorate-refs="heads/octopus*" >actual &&
>  	test_cmp expect.decorate actual
>  '
> @@ -787,6 +803,9 @@ test_expect_success 'decorate-refs-exclude with glob' '
>  	EOF
>  	git log -n6 --decorate=short --pretty="tformat:%f%d" \
>  		--decorate-refs-exclude="heads/octopus*" >actual &&
> +	test_cmp expect.decorate actual &&
> +	git -c log.excludeDecoration="heads/octopus*" log \
> +		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
>  	test_cmp expect.decorate actual
>  '
>
> @@ -801,6 +820,9 @@ test_expect_success 'decorate-refs-exclude without globs' '
>  	EOF
>  	git log -n6 --decorate=short --pretty="tformat:%f%d" \
>  		--decorate-refs-exclude="tags/reach" >actual &&
> +	test_cmp expect.decorate actual &&
> +	git -c log.excludeDecoration="tags/reach" log \
> +		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
>  	test_cmp expect.decorate actual
>  '
>
> @@ -816,11 +838,19 @@ test_expect_success 'multiple decorate-refs-exclude' '
>  	git log -n6 --decorate=short --pretty="tformat:%f%d" \
>  		--decorate-refs-exclude="heads/octopus*" \
>  		--decorate-refs-exclude="tags/reach" >actual &&
> +	test_cmp expect.decorate actual &&
> +	git -c log.excludeDecoration="heads/octopus*" \
> +		-c log.excludeDecoration="tags/reach" log \
> +		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
> +	test_cmp expect.decorate actual &&
> +	git -c log.excludeDecoration="heads/octopus*" log \
> +		--decorate-refs-exclude="tags/reach" \
> +		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
>  	test_cmp expect.decorate actual
>  '
>
>  test_expect_success 'decorate-refs and decorate-refs-exclude' '
> -	cat >expect.decorate <<-\EOF &&
> +	cat >expect.no-decorate <<-\EOF &&
>  	Merge-tag-reach (master)
>  	Merge-tags-octopus-a-and-octopus-b
>  	seventh
> @@ -831,6 +861,21 @@ test_expect_success 'decorate-refs and decorate-refs-exclude' '
>  	git log -n6 --decorate=short --pretty="tformat:%f%d" \
>  		--decorate-refs="heads/*" \
>  		--decorate-refs-exclude="heads/oc*" >actual &&
> +	test_cmp expect.no-decorate actual
> +'
> +
> +test_expect_success 'deocrate-refs and log.excludeDecoration' '
> +	cat >expect.decorate <<-\EOF &&
> +	Merge-tag-reach (master)
> +	Merge-tags-octopus-a-and-octopus-b
> +	seventh
> +	octopus-b (octopus-b)
> +	octopus-a (octopus-a)
> +	reach (reach)
> +	EOF
> +	git -c log.excludeDecoration="heads/oc*" log \
> +		--decorate-refs="heads/*" \
> +		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
>  	test_cmp expect.decorate actual
>  '
>
> @@ -846,6 +891,10 @@ test_expect_success 'decorate-refs-exclude and simplify-by-decoration' '
>  	git log -n6 --decorate=short --pretty="tformat:%f%d" \
>  		--decorate-refs-exclude="*octopus*" \
>  		--simplify-by-decoration >actual &&
> +	test_cmp expect.decorate actual &&
> +	git -c log.excludeDecoration="*octopus*" log \
> +		-n6 --decorate=short --pretty="tformat:%f%d" \
> +		--simplify-by-decoration >actual &&
>  	test_cmp expect.decorate actual
>  '
>
>
> base-commit: 274b9cc25322d9ee79aa8e6d4e86f0ffe5ced925
> --

This looks good to me, thanks.

  Reviewed-by: Taylor Blau <me@ttaylorr.com>

Thanks,
Taylor

Re: [PATCH v2] log: add log.excludeDecoration config option

[Junio C Hamano]

"Derrick Stolee via GitGitGadget" <gitgitgadget@gmail.com> writes:

> Add the 'log.excludeDecoration' config option so users can exclude
> some refs from decorations by default instead of needing to use
> --decorate-refs-exclude manually. The config value is multi-valued
> much like the command-line option. The documentation is careful to
> point out that the config value can be overridden by the
> --decorate-refs option, even though --decorate-refs-exclude would
> always "win" over --decorate-refs.
>
> Since the 'log.excludeDecoration' takes lower precedence to
> --decorate-refs, and --decorate-refs-exclude takes higher
> precedence, the struct decoration_filter needed another field.
> This led also to new logic in load_ref_decorations() and
> ref_filter_match().

All of the above makes sense to me.

> diff --git a/Documentation/config/log.txt b/Documentation/config/log.txt
> index e9e1e397f3f..1a158324f79 100644
> --- a/Documentation/config/log.txt
> +++ b/Documentation/config/log.txt
> @@ -18,6 +18,11 @@ log.decorate::
>  	names are shown. This is the same as the `--decorate` option
>  	of the `git log`.
>  
> +log.excludeDecoration::
> +	Exclude the specified patterns from the log decorations. This multi-
> +	valued config option is the same as the `--decorate-refs-exclude`
> +	option of `git log`.

Can the config still be "the same as" that option, though, with the
new "unlike --decorate-refs-exclude that always wins, config is at
the lowest precedence" rule?

> diff --git a/Documentation/git-log.txt b/Documentation/git-log.txt
> index bed09bb09e5..17592234ba4 100644
> --- a/Documentation/git-log.txt
> +++ b/Documentation/git-log.txt
> @@ -43,7 +43,10 @@ OPTIONS
>  	If no `--decorate-refs` is given, pretend as if all refs were
>  	included.  For each candidate, do not use it for decoration if it
>  	matches any patterns given to `--decorate-refs-exclude` or if it
> -	doesn't match any of the patterns given to `--decorate-refs`.
> +	doesn't match any of the patterns given to `--decorate-refs`. The
> +	`log.excludeDecoration` config option allows excluding refs from
> +	the decorations, but an explicit `--decorate-refs` pattern will
> +	override a match in `log.excludeDecoration`.

This description does make sense.

> diff --git a/log-tree.c b/log-tree.c
> index 52127427ffe..bd8d4c07bb8 100644
> --- a/log-tree.c
> +++ b/log-tree.c
> @@ -90,7 +90,8 @@ static int add_ref_decoration(const char *refname, const struct object_id *oid,
>  
>  	if (filter && !ref_filter_match(refname,
>  			      filter->include_ref_pattern,
> -			      filter->exclude_ref_pattern))
> +			      filter->exclude_ref_pattern,
> +			      filter->exclude_ref_config_pattern))
>  		return 0;

As there is only one caller of the ref_filter_match() helper, I
wonder if we want to

 (1) move the helper to log-tree.c, make it static and remove its
     definition from refs.h, and optionally rename it so that it is
     clear that this is not part of the "ref_filter" API that drives
     "for-each-ref" and friends;

 (2) instead of adding yet another pattern to the parameter list,
     make the helper take the whole "filter" instance as a single
     parameter.

as a clean-up.

> diff --git a/refs.c b/refs.c
> index 1ab0bb54d3d..63d8b569333 100644
> --- a/refs.c
> +++ b/refs.c
> @@ -339,9 +339,11 @@ static int match_ref_pattern(const char *refname,
>  
>  int ref_filter_match(const char *refname,
>  		     const struct string_list *include_patterns,
> -		     const struct string_list *exclude_patterns)
> +		     const struct string_list *exclude_patterns,
> +		     const struct string_list *exclude_patterns_config)
>  {
>  	struct string_list_item *item;
> +	int found = 0;
>  
>  	if (exclude_patterns && exclude_patterns->nr) {
>  		for_each_string_list_item(item, exclude_patterns) {
> @@ -351,7 +353,6 @@ int ref_filter_match(const char *refname,
>  	}
>  
>  	if (include_patterns && include_patterns->nr) {
> -		int found = 0;
>  		for_each_string_list_item(item, include_patterns) {
>  			if (match_ref_pattern(refname, item)) {
>  				found = 1;
> @@ -362,6 +363,16 @@ int ref_filter_match(const char *refname,
>  		if (!found)
>  			return 0;
>  	}
> +
> +	if (!found &&
> +	    exclude_patterns_config &&
> +	    exclude_patterns_config->nr) {
> +		for_each_string_list_item(item, exclude_patterns_config) {
> +			if (match_ref_pattern(refname, item))
> +				return 0;
> +		}
> +	}

Hmph.  Do we still need "found" here?  If there are include patterns
given explicitly from the command line, a ref MUST match one of them
in order to be included, and a ref that matches one of them will be
included no matter that exclude config says.

So shouldn't the updated logic for the include patterns part be more
like

	if (include_patterns is not empty) {
		for_each_string_list_item(item, include_patterns) {
			if (matches)
				return 1; /* matches */
		}
		return 0; /* did not match */
	}

Then the new code to deal with "config", which will come after the
"include" thing, will only have to deal with the case where there is
no include patterns given from the command line.  And when the
control reaches there, we need to do exactly the same thing as we do
to the commad line excludes, i.e. see if any of the config patterns
match, and say "reject" if we find a match.

And after the loop for the exclude config fails to "return 0" early,
we will hit the "return 1" at the end.

Had I butchered the logic somehow?

>  /*
> + * Returns 0 if the refname matches any of the exclude_patterns.
> + *
> + * Returns 0 if include_patterns is non-empty but refname does not match
> + * any of those patterns.
> + *
> + * Returns 0 if refname matches a pattern in exclude_patterns_config but
> + * does not match any pattern in inclue_patterns.
> + *
> + * Otherwise, returns 1.
>   *
>   * This has the effect of matching everything by default, unless the user
>   * specifies rules otherwise.
>   */

The above is not wrong per-se, but feels somewhat roundabout way to
define what it does, from the viewpoint of somebody who may want to
call or understand it.  "What matches one of the exclude patterns is
excluded.  If the include patterns is empty, what did not match
exclude patterns is included unless it matches one of the exclude
configs.  But if the include patterns is not empty, what did not
match exclude patterns is included only if it matches one of the
include patterns."
>  int ref_filter_match(const char *refname,
>  		     const struct string_list *include_patterns,
> -		     const struct string_list *exclude_patterns);
> +		     const struct string_list *exclude_patterns,
> +		     const struct string_list *exclude_patterns_config);
>  
>  static inline const char *has_glob_specials(const char *pattern)
>  {
> diff --git a/t/t4202-log.sh b/t/t4202-log.sh
> index 0f766ba65f5..78f9ade6870 100755
> --- a/t/t4202-log.sh
> +++ b/t/t4202-log.sh
> @@ -742,7 +742,23 @@ test_expect_success 'decorate-refs with glob' '
>  	octopus-a (octopus-a)
>  	reach
>  	EOF
> +	cat >expect.no-decorate <<-\EOF &&
> +	Merge-tag-reach
> +	Merge-tags-octopus-a-and-octopus-b
> +	seventh
> +	octopus-b
> +	octopus-a
> +	reach
> +	EOF
> +	git log -n6 --decorate=short --pretty="tformat:%f%d" \
> +		--decorate-refs="heads/octopus*" >actual &&
> +	test_cmp expect.decorate actual &&
>  	git log -n6 --decorate=short --pretty="tformat:%f%d" \
> +		--decorate-refs-exclude="heads/octopus*" \
> +		--decorate-refs="heads/octopus*" >actual &&
> +	test_cmp expect.no-decorate actual &&
> +	git -c log.excludeDecoration="heads/octopus*" log \
> +		-n6 --decorate=short --pretty="tformat:%f%d" \
>  		--decorate-refs="heads/octopus*" >actual &&
>  	test_cmp expect.decorate actual
>  '
> @@ -787,6 +803,9 @@ test_expect_success 'decorate-refs-exclude with glob' '
>  	EOF
>  	git log -n6 --decorate=short --pretty="tformat:%f%d" \
>  		--decorate-refs-exclude="heads/octopus*" >actual &&
> +	test_cmp expect.decorate actual &&
> +	git -c log.excludeDecoration="heads/octopus*" log \
> +		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
>  	test_cmp expect.decorate actual
>  '
>  
> @@ -801,6 +820,9 @@ test_expect_success 'decorate-refs-exclude without globs' '
>  	EOF
>  	git log -n6 --decorate=short --pretty="tformat:%f%d" \
>  		--decorate-refs-exclude="tags/reach" >actual &&
> +	test_cmp expect.decorate actual &&
> +	git -c log.excludeDecoration="tags/reach" log \
> +		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
>  	test_cmp expect.decorate actual
>  '
>  
> @@ -816,11 +838,19 @@ test_expect_success 'multiple decorate-refs-exclude' '
>  	git log -n6 --decorate=short --pretty="tformat:%f%d" \
>  		--decorate-refs-exclude="heads/octopus*" \
>  		--decorate-refs-exclude="tags/reach" >actual &&
> +	test_cmp expect.decorate actual &&
> +	git -c log.excludeDecoration="heads/octopus*" \
> +		-c log.excludeDecoration="tags/reach" log \
> +		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
> +	test_cmp expect.decorate actual &&
> +	git -c log.excludeDecoration="heads/octopus*" log \
> +		--decorate-refs-exclude="tags/reach" \
> +		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
>  	test_cmp expect.decorate actual
>  '
>  
>  test_expect_success 'decorate-refs and decorate-refs-exclude' '
> -	cat >expect.decorate <<-\EOF &&
> +	cat >expect.no-decorate <<-\EOF &&
>  	Merge-tag-reach (master)
>  	Merge-tags-octopus-a-and-octopus-b
>  	seventh
> @@ -831,6 +861,21 @@ test_expect_success 'decorate-refs and decorate-refs-exclude' '
>  	git log -n6 --decorate=short --pretty="tformat:%f%d" \
>  		--decorate-refs="heads/*" \
>  		--decorate-refs-exclude="heads/oc*" >actual &&
> +	test_cmp expect.no-decorate actual
> +'
> +
> +test_expect_success 'deocrate-refs and log.excludeDecoration' '
> +	cat >expect.decorate <<-\EOF &&
> +	Merge-tag-reach (master)
> +	Merge-tags-octopus-a-and-octopus-b
> +	seventh
> +	octopus-b (octopus-b)
> +	octopus-a (octopus-a)
> +	reach (reach)
> +	EOF
> +	git -c log.excludeDecoration="heads/oc*" log \
> +		--decorate-refs="heads/*" \
> +		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
>  	test_cmp expect.decorate actual
>  '
>  
> @@ -846,6 +891,10 @@ test_expect_success 'decorate-refs-exclude and simplify-by-decoration' '
>  	git log -n6 --decorate=short --pretty="tformat:%f%d" \
>  		--decorate-refs-exclude="*octopus*" \
>  		--simplify-by-decoration >actual &&
> +	test_cmp expect.decorate actual &&
> +	git -c log.excludeDecoration="*octopus*" log \
> +		-n6 --decorate=short --pretty="tformat:%f%d" \
> +		--simplify-by-decoration >actual &&
>  	test_cmp expect.decorate actual
>  '
>  
>
> base-commit: 274b9cc25322d9ee79aa8e6d4e86f0ffe5ced925

Re: [PATCH v2] log: add log.excludeDecoration config option

[Junio C Hamano]

Junio C Hamano <gitster@pobox.com> writes:

> Hmph.  Do we still need "found" here?  If there are include patterns
> given explicitly from the command line, a ref MUST match one of them
> in order to be included, and a ref that matches one of them will be
> included no matter that exclude config says.
>
> So shouldn't the updated logic for the include patterns part be more
> like ...

I still think that the two clean-ups I mentioned are both worth
doing, but without them, but with the simplification of the code 
I suggested, the resulting helper becomes like this, which I think
is quite easy to understand.  It seems to pass t4202, which you
updated, too.



int ref_filter_match(const char *refname,
		     const struct string_list *include_patterns,
		     const struct string_list *exclude_patterns,
		     const struct string_list *exclude_patterns_config)
{
	struct string_list_item *item;

	if (exclude_patterns && exclude_patterns->nr) {
		for_each_string_list_item(item, exclude_patterns) {
			if (match_ref_pattern(refname, item))
				return 0;
		}
	}

	if (include_patterns && include_patterns->nr) {
		for_each_string_list_item(item, include_patterns) {
			if (match_ref_pattern(refname, item)) {
				return 1;
			}
		}
		return 0;
	}

	if (exclude_patterns_config && exclude_patterns_config->nr) {
		for_each_string_list_item(item, exclude_patterns_config) {
			if (match_ref_pattern(refname, item))
				return 0;
		}
	}

	return 1;
}

Re: [PATCH v2] log: add log.excludeDecoration config option

[Derrick Stolee]

On 4/15/2020 1:29 PM, Junio C Hamano wrote:
> Junio C Hamano <gitster@pobox.com> writes:
> 
>> Hmph.  Do we still need "found" here?  If there are include patterns
>> given explicitly from the command line, a ref MUST match one of them
>> in order to be included, and a ref that matches one of them will be
>> included no matter that exclude config says.
>>
>> So shouldn't the updated logic for the include patterns part be more
>> like ...
> 
> I still think that the two clean-ups I mentioned are both worth
> doing, but without them, but with the simplification of the code 
> I suggested, the resulting helper becomes like this, which I think
> is quite easy to understand.  It seems to pass t4202, which you
> updated, too.
> 
> 
> 
> int ref_filter_match(const char *refname,
> 		     const struct string_list *include_patterns,
> 		     const struct string_list *exclude_patterns,
> 		     const struct string_list *exclude_patterns_config)
> {
> 	struct string_list_item *item;
> 
> 	if (exclude_patterns && exclude_patterns->nr) {
> 		for_each_string_list_item(item, exclude_patterns) {
> 			if (match_ref_pattern(refname, item))
> 				return 0;
> 		}
> 	}
> 
> 	if (include_patterns && include_patterns->nr) {
> 		for_each_string_list_item(item, include_patterns) {
> 			if (match_ref_pattern(refname, item)) {
> 				return 1;
> 			}
> 		}
> 		return 0;
> 	}
> 
> 	if (exclude_patterns_config && exclude_patterns_config->nr) {
> 		for_each_string_list_item(item, exclude_patterns_config) {
> 			if (match_ref_pattern(refname, item))
> 				return 0;
> 		}
> 	}
> 
> 	return 1;
> }

This reorganization of the code is much cleaner, and it can
guide cleaning up the documentation comment in the header file.

I see you included it in a SQUASH??? commit, which I will squash
into my branch for v3.

Thanks,
-Stolee

Re: [PATCH v2] log: add log.excludeDecoration config option

[Derrick Stolee]

On 4/15/2020 1:24 PM, Junio C Hamano wrote:
> "Derrick Stolee via GitGitGadget" <gitgitgadget@gmail.com> writes:
> 
>> Add the 'log.excludeDecoration' config option so users can exclude
>> some refs from decorations by default instead of needing to use
>> --decorate-refs-exclude manually. The config value is multi-valued
>> much like the command-line option. The documentation is careful to
>> point out that the config value can be overridden by the
>> --decorate-refs option, even though --decorate-refs-exclude would
>> always "win" over --decorate-refs.
>>
>> Since the 'log.excludeDecoration' takes lower precedence to
>> --decorate-refs, and --decorate-refs-exclude takes higher
>> precedence, the struct decoration_filter needed another field.
>> This led also to new logic in load_ref_decorations() and
>> ref_filter_match().
> 
> All of the above makes sense to me.
> 
>> diff --git a/Documentation/config/log.txt b/Documentation/config/log.txt
>> index e9e1e397f3f..1a158324f79 100644
>> --- a/Documentation/config/log.txt
>> +++ b/Documentation/config/log.txt
>> @@ -18,6 +18,11 @@ log.decorate::
>>  	names are shown. This is the same as the `--decorate` option
>>  	of the `git log`.
>>  
>> +log.excludeDecoration::
>> +	Exclude the specified patterns from the log decorations. This multi-
>> +	valued config option is the same as the `--decorate-refs-exclude`
>> +	option of `git log`.
> 
> Can the config still be "the same as" that option, though, with the
> new "unlike --decorate-refs-exclude that always wins, config is at
> the lowest precedence" rule?

I thought I had updated this to make that clearer, but it looks like
I missed it when staging.

What I had meant to write was this:

log.excludeDecoration::
	Exclude the specified patterns from the log decorations. This is
	similar to the `--decorate-refs-exclude` command-line option, but
	the config option can be overridden by the `--decorate-refs`
	option.

>> diff --git a/log-tree.c b/log-tree.c
>> index 52127427ffe..bd8d4c07bb8 100644
>> --- a/log-tree.c
>> +++ b/log-tree.c
>> @@ -90,7 +90,8 @@ static int add_ref_decoration(const char *refname, const struct object_id *oid,
>>  
>>  	if (filter && !ref_filter_match(refname,
>>  			      filter->include_ref_pattern,
>> -			      filter->exclude_ref_pattern))
>> +			      filter->exclude_ref_pattern,
>> +			      filter->exclude_ref_config_pattern))
>>  		return 0;
> 
> As there is only one caller of the ref_filter_match() helper, I
> wonder if we want to
> 
>  (1) move the helper to log-tree.c, make it static and remove its
>      definition from refs.h, and optionally rename it so that it is
>      clear that this is not part of the "ref_filter" API that drives
>      "for-each-ref" and friends;
> 
>  (2) instead of adding yet another pattern to the parameter list,
>      make the helper take the whole "filter" instance as a single
>      parameter.
> 
> as a clean-up.

This is a good idea. I was thinking the code was "smelly" when I had
to jump through so many hoops to get it working. I'll add a refactor
patch in front of this one.

>> diff --git a/refs.c b/refs.c
>> index 1ab0bb54d3d..63d8b569333 100644
>> --- a/refs.c
>> +++ b/refs.c
>> @@ -339,9 +339,11 @@ static int match_ref_pattern(const char *refname,
>>  
>>  int ref_filter_match(const char *refname,
>>  		     const struct string_list *include_patterns,
>> -		     const struct string_list *exclude_patterns)
>> +		     const struct string_list *exclude_patterns,
>> +		     const struct string_list *exclude_patterns_config)
>>  {
>>  	struct string_list_item *item;
>> +	int found = 0;
>>  
>>  	if (exclude_patterns && exclude_patterns->nr) {
>>  		for_each_string_list_item(item, exclude_patterns) {
>> @@ -351,7 +353,6 @@ int ref_filter_match(const char *refname,
>>  	}
>>  
>>  	if (include_patterns && include_patterns->nr) {
>> -		int found = 0;
>>  		for_each_string_list_item(item, include_patterns) {
>>  			if (match_ref_pattern(refname, item)) {
>>  				found = 1;
>> @@ -362,6 +363,16 @@ int ref_filter_match(const char *refname,
>>  		if (!found)
>>  			return 0;
>>  	}
>> +
>> +	if (!found &&
>> +	    exclude_patterns_config &&
>> +	    exclude_patterns_config->nr) {
>> +		for_each_string_list_item(item, exclude_patterns_config) {
>> +			if (match_ref_pattern(refname, item))
>> +				return 0;
>> +		}
>> +	}
> 
> Hmph.  Do we still need "found" here? ...

You included an excellent update in another response, which I have
squashed locally.

>>  /*
>> + * Returns 0 if the refname matches any of the exclude_patterns.
>> + *
>> + * Returns 0 if include_patterns is non-empty but refname does not match
>> + * any of those patterns.
>> + *
>> + * Returns 0 if refname matches a pattern in exclude_patterns_config but
>> + * does not match any pattern in inclue_patterns.
>> + *
>> + * Otherwise, returns 1.
>>   *
>>   * This has the effect of matching everything by default, unless the user
>>   * specifies rules otherwise.
>>   */
> 
> The above is not wrong per-se, but feels somewhat roundabout way to
> define what it does, from the viewpoint of somebody who may want to
> call or understand it.  "What matches one of the exclude patterns is
> excluded.  If the include patterns is empty, what did not match
> exclude patterns is included unless it matches one of the exclude
> configs.  But if the include patterns is not empty, what did not
> match exclude patterns is included only if it matches one of the
> include patterns."

Your new logic for the method makes this a bit simpler to write:

/*
 * Returns 0 if the refname matches any of the exclude_patterns.
 *
 * Otherwise, returns 1 if the refname matches any of the include_patterns.
 *
 * Otherwise, returns 0 if include_patterns is non-empty.
 *
 * Otherwise, returns 0 if the refname matches any of the patterns
 * in exclude_patterns_config.
 *
 * Finally, if none of the above apply, return 1.
 */

However, if I pull this method into a static helper method, then
the documentation is unnecessary.

Thanks for the careful review!

-Stolee

[PATCH v3 0/2] log: add log.excludeDecoration config option

[Derrick Stolee via GitGitGadget]

This was something hinted at in the "fetch" step of the background
maintenance RFC. Should be a relatively minor addition to our config
options.

We definitely want this feature for microsoft/git (we would set
log.excludeDecoration=refs/scalar/* in all Scalar repos), but we will wait
for feedback from the community.

Updates in v2:

 * Use for_each_string_list_item()
   
   
 * Update the matching logic to allow --decorate-refs to override the config
   option.
   
   

Updates in v3:

 * Moved and refactored the ref_filter_match() in a preparation patch.
   
   
 * Used Junio's new logic in ref_filter_match()
   
   
 * Updated the config documentation to be more clear.
   
   

Thanks, -Stolee

Derrick Stolee (2):
  log-tree: make ref_filter_match() a helper method
  log: add log.excludeDecoration config option

 Documentation/config/log.txt |  6 ++++
 Documentation/git-log.txt    |  5 +++-
 builtin/log.c                | 16 +++++++++-
 log-tree.c                   | 58 ++++++++++++++++++++++++++++++++++--
 log-tree.h                   |  4 ++-
 refs.c                       | 44 ---------------------------
 refs.h                       | 12 --------
 t/t4202-log.sh               | 51 ++++++++++++++++++++++++++++++-
 8 files changed, 133 insertions(+), 63 deletions(-)


base-commit: 274b9cc25322d9ee79aa8e6d4e86f0ffe5ced925
Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-610%2Fderrickstolee%2Flog-exclude-decoration-v3
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-610/derrickstolee/log-exclude-decoration-v3
Pull-Request: https://github.com/gitgitgadget/git/pull/610

Range-diff vs v2:

 -:  ----------- > 1:  6840f8801e4 log-tree: make ref_filter_match() a helper method
 1:  cbdaef4a8e1 ! 2:  96c865e9214 log: add log.excludeDecoration config option
     @@ Commit message
          [1] https://github.com/microsoft/scalar
          [2] https://lore.kernel.org/git/77b1da5d3063a2404cd750adfe3bb8be9b6c497d.1585946894.git.gitgitgadget@gmail.com/
      
     +    Helped-by: Junio C Hamano <gister@pobox.com>
          Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
      
       ## Documentation/config/log.txt ##
     @@ Documentation/config/log.txt: log.decorate::
       	of the `git log`.
       
      +log.excludeDecoration::
     -+	Exclude the specified patterns from the log decorations. This multi-
     -+	valued config option is the same as the `--decorate-refs-exclude`
     -+	option of `git log`.
     ++	Exclude the specified patterns from the log decorations. This is
     ++	similar to the `--decorate-refs-exclude` command-line option, but
     ++	the config option can be overridden by the `--decorate-refs`
     ++	option.
      +
       log.follow::
       	If `true`, `git log` will act as if the `--follow` option was used when
     @@ builtin/log.c: static void cmd_log_init_finish(int argc, const char **argv, cons
       
      
       ## log-tree.c ##
     -@@ log-tree.c: static int add_ref_decoration(const char *refname, const struct object_id *oid,
     +@@ log-tree.c: static int ref_filter_match(const char *refname,
     + 	struct string_list_item *item;
     + 	const struct string_list *exclude_patterns = filter->exclude_ref_pattern;
     + 	const struct string_list *include_patterns = filter->include_ref_pattern;
     ++	const struct string_list *exclude_patterns_config =
     ++				filter->exclude_ref_config_pattern;
     + 
     + 	if (exclude_patterns && exclude_patterns->nr) {
     + 		for_each_string_list_item(item, exclude_patterns) {
     +@@ log-tree.c: static int ref_filter_match(const char *refname,
     + 	}
     + 
     + 	if (include_patterns && include_patterns->nr) {
     +-		int found = 0;
     + 		for_each_string_list_item(item, include_patterns) {
     + 			if (match_ref_pattern(refname, item)) {
     +-				found = 1;
     +-				break;
     ++				return 1;
     + 			}
     + 		}
     ++		return 0;
     ++	}
       
     - 	if (filter && !ref_filter_match(refname,
     - 			      filter->include_ref_pattern,
     --			      filter->exclude_ref_pattern))
     -+			      filter->exclude_ref_pattern,
     -+			      filter->exclude_ref_config_pattern))
     - 		return 0;
     +-		if (!found)
     +-			return 0;
     ++	if (exclude_patterns_config && exclude_patterns_config->nr) {
     ++		for_each_string_list_item(item, exclude_patterns_config) {
     ++			if (match_ref_pattern(refname, item))
     ++				return 0;
     ++		}
     + 	}
     ++
     + 	return 1;
     + }
       
     - 	if (starts_with(refname, git_replace_ref_base)) {
      @@ log-tree.c: void load_ref_decorations(struct decoration_filter *filter, int flags)
       			for_each_string_list_item(item, filter->include_ref_pattern) {
       				normalize_glob_ref(item, NULL, item->string);
     @@ log-tree.h: struct log_info {
       
       int parse_decorate_color_config(const char *var, const char *slot_name, const char *value);
      
     - ## refs.c ##
     -@@ refs.c: static int match_ref_pattern(const char *refname,
     - 
     - int ref_filter_match(const char *refname,
     - 		     const struct string_list *include_patterns,
     --		     const struct string_list *exclude_patterns)
     -+		     const struct string_list *exclude_patterns,
     -+		     const struct string_list *exclude_patterns_config)
     - {
     - 	struct string_list_item *item;
     -+	int found = 0;
     - 
     - 	if (exclude_patterns && exclude_patterns->nr) {
     - 		for_each_string_list_item(item, exclude_patterns) {
     -@@ refs.c: int ref_filter_match(const char *refname,
     - 	}
     - 
     - 	if (include_patterns && include_patterns->nr) {
     --		int found = 0;
     - 		for_each_string_list_item(item, include_patterns) {
     - 			if (match_ref_pattern(refname, item)) {
     - 				found = 1;
     -@@ refs.c: int ref_filter_match(const char *refname,
     - 		if (!found)
     - 			return 0;
     - 	}
     -+
     -+	if (!found &&
     -+	    exclude_patterns_config &&
     -+	    exclude_patterns_config->nr) {
     -+		for_each_string_list_item(item, exclude_patterns_config) {
     -+			if (match_ref_pattern(refname, item))
     -+				return 0;
     -+		}
     -+	}
     -+
     - 	return 1;
     - }
     - 
     -
     - ## refs.h ##
     -@@ refs.h: void normalize_glob_ref(struct string_list_item *item, const char *prefix,
     - 			const char *pattern);
     - 
     - /*
     -- * Returns 0 if refname matches any of the exclude_patterns, or if it doesn't
     -- * match any of the include_patterns. Returns 1 otherwise.
     -+ * Returns 0 if the refname matches any of the exclude_patterns.
     -+ *
     -+ * Returns 0 if include_patterns is non-empty but refname does not match
     -+ * any of those patterns.
     -+ *
     -+ * Returns 0 if refname matches a pattern in exclude_patterns_config but
     -+ * does not match any pattern in inclue_patterns.
     -+ *
     -+ * Otherwise, returns 1.
     -  *
     -- * If pattern list is NULL or empty, matching against that list is skipped.
     -  * This has the effect of matching everything by default, unless the user
     -  * specifies rules otherwise.
     -  */
     - int ref_filter_match(const char *refname,
     - 		     const struct string_list *include_patterns,
     --		     const struct string_list *exclude_patterns);
     -+		     const struct string_list *exclude_patterns,
     -+		     const struct string_list *exclude_patterns_config);
     - 
     - static inline const char *has_glob_specials(const char *pattern)
     - {
     -
       ## t/t4202-log.sh ##
      @@ t/t4202-log.sh: test_expect_success 'decorate-refs with glob' '
       	octopus-a (octopus-a)

-- 
gitgitgadget

[PATCH v3 1/2] log-tree: make ref_filter_match() a helper method

[Derrick Stolee via GitGitGadget]

From: Derrick Stolee <dstolee@microsoft.com>

The ref_filter_match() method is defined in refs.h and implemented
in refs.c, but is only used by add_ref_decoration() in log-tree.c.
Move it into that file as a static helper method. The
match_ref_pattern() comes along for the ride.

While moving the code, also make a slight adjustment to have
ref_filter_match() take a struct decoration_filter pointer instead
of multiple string lists. This is non-functional, but will make a
later change be much cleaner.

The diff is easier to parse when using the --color-moved option.

Reported-by: Junio C Hamano <gister@pobox.com>
Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
---
 log-tree.c | 49 ++++++++++++++++++++++++++++++++++++++++++++++---
 refs.c     | 44 --------------------------------------------
 refs.h     | 12 ------------
 3 files changed, 46 insertions(+), 59 deletions(-)

diff --git a/log-tree.c b/log-tree.c
index 52127427ffe..ab6d29a746b 100644
--- a/log-tree.c
+++ b/log-tree.c
@@ -81,6 +81,51 @@ const struct name_decoration *get_name_decoration(const struct object *obj)
 	return lookup_decoration(&name_decoration, obj);
 }
 
+static int match_ref_pattern(const char *refname,
+			     const struct string_list_item *item)
+{
+	int matched = 0;
+	if (item->util == NULL) {
+		if (!wildmatch(item->string, refname, 0))
+			matched = 1;
+	} else {
+		const char *rest;
+		if (skip_prefix(refname, item->string, &rest) &&
+		    (!*rest || *rest == '/'))
+			matched = 1;
+	}
+	return matched;
+}
+
+static int ref_filter_match(const char *refname,
+			    const struct decoration_filter *filter)
+{
+	struct string_list_item *item;
+	const struct string_list *exclude_patterns = filter->exclude_ref_pattern;
+	const struct string_list *include_patterns = filter->include_ref_pattern;
+
+	if (exclude_patterns && exclude_patterns->nr) {
+		for_each_string_list_item(item, exclude_patterns) {
+			if (match_ref_pattern(refname, item))
+				return 0;
+		}
+	}
+
+	if (include_patterns && include_patterns->nr) {
+		int found = 0;
+		for_each_string_list_item(item, include_patterns) {
+			if (match_ref_pattern(refname, item)) {
+				found = 1;
+				break;
+			}
+		}
+
+		if (!found)
+			return 0;
+	}
+	return 1;
+}
+
 static int add_ref_decoration(const char *refname, const struct object_id *oid,
 			      int flags, void *cb_data)
 {
@@ -88,9 +133,7 @@ static int add_ref_decoration(const char *refname, const struct object_id *oid,
 	enum decoration_type type = DECORATION_NONE;
 	struct decoration_filter *filter = (struct decoration_filter *)cb_data;
 
-	if (filter && !ref_filter_match(refname,
-			      filter->include_ref_pattern,
-			      filter->exclude_ref_pattern))
+	if (filter && !ref_filter_match(refname, filter))
 		return 0;
 
 	if (starts_with(refname, git_replace_ref_base)) {
diff --git a/refs.c b/refs.c
index 1ab0bb54d3d..28c91d603c2 100644
--- a/refs.c
+++ b/refs.c
@@ -321,50 +321,6 @@ int ref_exists(const char *refname)
 	return refs_ref_exists(get_main_ref_store(the_repository), refname);
 }
 
-static int match_ref_pattern(const char *refname,
-			     const struct string_list_item *item)
-{
-	int matched = 0;
-	if (item->util == NULL) {
-		if (!wildmatch(item->string, refname, 0))
-			matched = 1;
-	} else {
-		const char *rest;
-		if (skip_prefix(refname, item->string, &rest) &&
-		    (!*rest || *rest == '/'))
-			matched = 1;
-	}
-	return matched;
-}
-
-int ref_filter_match(const char *refname,
-		     const struct string_list *include_patterns,
-		     const struct string_list *exclude_patterns)
-{
-	struct string_list_item *item;
-
-	if (exclude_patterns && exclude_patterns->nr) {
-		for_each_string_list_item(item, exclude_patterns) {
-			if (match_ref_pattern(refname, item))
-				return 0;
-		}
-	}
-
-	if (include_patterns && include_patterns->nr) {
-		int found = 0;
-		for_each_string_list_item(item, include_patterns) {
-			if (match_ref_pattern(refname, item)) {
-				found = 1;
-				break;
-			}
-		}
-
-		if (!found)
-			return 0;
-	}
-	return 1;
-}
-
 static int filter_refs(const char *refname, const struct object_id *oid,
 			   int flags, void *data)
 {
diff --git a/refs.h b/refs.h
index 545029c6d80..a92d2c74c83 100644
--- a/refs.h
+++ b/refs.h
@@ -361,18 +361,6 @@ int for_each_rawref(each_ref_fn fn, void *cb_data);
 void normalize_glob_ref(struct string_list_item *item, const char *prefix,
 			const char *pattern);
 
-/*
- * Returns 0 if refname matches any of the exclude_patterns, or if it doesn't
- * match any of the include_patterns. Returns 1 otherwise.
- *
- * If pattern list is NULL or empty, matching against that list is skipped.
- * This has the effect of matching everything by default, unless the user
- * specifies rules otherwise.
- */
-int ref_filter_match(const char *refname,
-		     const struct string_list *include_patterns,
-		     const struct string_list *exclude_patterns);
-
 static inline const char *has_glob_specials(const char *pattern)
 {
 	return strpbrk(pattern, "?*[");
-- 
gitgitgadget

[PATCH v3 2/2] log: add log.excludeDecoration config option

[Derrick Stolee via GitGitGadget]

From: Derrick Stolee <dstolee@microsoft.com>

In 'git log', the --decorate-refs-exclude option appends a pattern
to a string_list. This list is used to prevent showing some refs
in the decoration output, or even by --simplify-by-decoration.

Users may want to use their refs space to store utility refs that
should not appear in the decoration output. For example, Scalar [1]
runs a background fetch but places the "new" refs inside the
refs/scalar/hidden/<remote>/* refspace instead of refs/<remote>/*
to avoid updating remote refs when the user is not looking. However,
these "hidden" refs appear during regular 'git log' queries.

A similar idea to use "hidden" refs is under consideration for core
Git [2].

Add the 'log.excludeDecoration' config option so users can exclude
some refs from decorations by default instead of needing to use
--decorate-refs-exclude manually. The config value is multi-valued
much like the command-line option. The documentation is careful to
point out that the config value can be overridden by the
--decorate-refs option, even though --decorate-refs-exclude would
always "win" over --decorate-refs.

Since the 'log.excludeDecoration' takes lower precedence to
--decorate-refs, and --decorate-refs-exclude takes higher
precedence, the struct decoration_filter needed another field.
This led also to new logic in load_ref_decorations() and
ref_filter_match().

There are several tests in t4202-log.sh that test the
--decorate-refs-(include|exclude) options, so these are extended.
Since the expected output is already stored as a file, most tests
could simply replace a "--decorate-refs-exclude" option with an
in-line config setting. Other tests involve the precedence of
the config option compared to command-line options and needed more
modification.

[1] https://github.com/microsoft/scalar
[2] https://lore.kernel.org/git/77b1da5d3063a2404cd750adfe3bb8be9b6c497d.1585946894.git.gitgitgadget@gmail.com/

Helped-by: Junio C Hamano <gister@pobox.com>
Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
---
 Documentation/config/log.txt |  6 +++++
 Documentation/git-log.txt    |  5 +++-
 builtin/log.c                | 16 ++++++++++-
 log-tree.c                   | 19 ++++++++++----
 log-tree.h                   |  4 ++-
 t/t4202-log.sh               | 51 +++++++++++++++++++++++++++++++++++-
 6 files changed, 92 insertions(+), 9 deletions(-)

diff --git a/Documentation/config/log.txt b/Documentation/config/log.txt
index e9e1e397f3f..208d5fdcaa6 100644
--- a/Documentation/config/log.txt
+++ b/Documentation/config/log.txt
@@ -18,6 +18,12 @@ log.decorate::
 	names are shown. This is the same as the `--decorate` option
 	of the `git log`.
 
+log.excludeDecoration::
+	Exclude the specified patterns from the log decorations. This is
+	similar to the `--decorate-refs-exclude` command-line option, but
+	the config option can be overridden by the `--decorate-refs`
+	option.
+
 log.follow::
 	If `true`, `git log` will act as if the `--follow` option was used when
 	a single <path> is given.  This has the same limitations as `--follow`,
diff --git a/Documentation/git-log.txt b/Documentation/git-log.txt
index bed09bb09e5..17592234ba4 100644
--- a/Documentation/git-log.txt
+++ b/Documentation/git-log.txt
@@ -43,7 +43,10 @@ OPTIONS
 	If no `--decorate-refs` is given, pretend as if all refs were
 	included.  For each candidate, do not use it for decoration if it
 	matches any patterns given to `--decorate-refs-exclude` or if it
-	doesn't match any of the patterns given to `--decorate-refs`.
+	doesn't match any of the patterns given to `--decorate-refs`. The
+	`log.excludeDecoration` config option allows excluding refs from
+	the decorations, but an explicit `--decorate-refs` pattern will
+	override a match in `log.excludeDecoration`.
 
 --source::
 	Print out the ref name given on the command line by which each
diff --git a/builtin/log.c b/builtin/log.c
index 83a4a6188e2..72192710dcd 100644
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -164,9 +164,11 @@ static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
 	int quiet = 0, source = 0, mailmap;
 	static struct line_opt_callback_data line_cb = {NULL, NULL, STRING_LIST_INIT_DUP};
 	static struct string_list decorate_refs_exclude = STRING_LIST_INIT_NODUP;
+	static struct string_list decorate_refs_exclude_config = STRING_LIST_INIT_NODUP;
 	static struct string_list decorate_refs_include = STRING_LIST_INIT_NODUP;
 	struct decoration_filter decoration_filter = {&decorate_refs_include,
-						      &decorate_refs_exclude};
+						      &decorate_refs_exclude,
+						      &decorate_refs_exclude_config};
 	static struct revision_sources revision_sources;
 
 	const struct option builtin_log_options[] = {
@@ -236,7 +238,19 @@ static void cmd_log_init_finish(int argc, const char **argv, const char *prefix,
 	}
 
 	if (decoration_style) {
+		const struct string_list *config_exclude =
+			repo_config_get_value_multi(the_repository,
+						    "log.excludeDecoration");
+
+		if (config_exclude) {
+			struct string_list_item *item;
+			for_each_string_list_item(item, config_exclude)
+				string_list_append(&decorate_refs_exclude_config,
+						   item->string);
+		}
+
 		rev->show_decorations = 1;
+
 		load_ref_decorations(&decoration_filter, decoration_style);
 	}
 
diff --git a/log-tree.c b/log-tree.c
index ab6d29a746b..fd3fd3316a1 100644
--- a/log-tree.c
+++ b/log-tree.c
@@ -103,6 +103,8 @@ static int ref_filter_match(const char *refname,
 	struct string_list_item *item;
 	const struct string_list *exclude_patterns = filter->exclude_ref_pattern;
 	const struct string_list *include_patterns = filter->include_ref_pattern;
+	const struct string_list *exclude_patterns_config =
+				filter->exclude_ref_config_pattern;
 
 	if (exclude_patterns && exclude_patterns->nr) {
 		for_each_string_list_item(item, exclude_patterns) {
@@ -112,17 +114,21 @@ static int ref_filter_match(const char *refname,
 	}
 
 	if (include_patterns && include_patterns->nr) {
-		int found = 0;
 		for_each_string_list_item(item, include_patterns) {
 			if (match_ref_pattern(refname, item)) {
-				found = 1;
-				break;
+				return 1;
 			}
 		}
+		return 0;
+	}
 
-		if (!found)
-			return 0;
+	if (exclude_patterns_config && exclude_patterns_config->nr) {
+		for_each_string_list_item(item, exclude_patterns_config) {
+			if (match_ref_pattern(refname, item))
+				return 0;
+		}
 	}
+
 	return 1;
 }
 
@@ -198,6 +204,9 @@ void load_ref_decorations(struct decoration_filter *filter, int flags)
 			for_each_string_list_item(item, filter->include_ref_pattern) {
 				normalize_glob_ref(item, NULL, item->string);
 			}
+			for_each_string_list_item(item, filter->exclude_ref_config_pattern) {
+				normalize_glob_ref(item, NULL, item->string);
+			}
 		}
 		decoration_loaded = 1;
 		decoration_flags = flags;
diff --git a/log-tree.h b/log-tree.h
index e6686280746..8fa79289ec6 100644
--- a/log-tree.h
+++ b/log-tree.h
@@ -8,7 +8,9 @@ struct log_info {
 };
 
 struct decoration_filter {
-	struct string_list *include_ref_pattern, *exclude_ref_pattern;
+	struct string_list *include_ref_pattern;
+	struct string_list *exclude_ref_pattern;
+	struct string_list *exclude_ref_config_pattern;
 };
 
 int parse_decorate_color_config(const char *var, const char *slot_name, const char *value);
diff --git a/t/t4202-log.sh b/t/t4202-log.sh
index 0f766ba65f5..78f9ade6870 100755
--- a/t/t4202-log.sh
+++ b/t/t4202-log.sh
@@ -742,7 +742,23 @@ test_expect_success 'decorate-refs with glob' '
 	octopus-a (octopus-a)
 	reach
 	EOF
+	cat >expect.no-decorate <<-\EOF &&
+	Merge-tag-reach
+	Merge-tags-octopus-a-and-octopus-b
+	seventh
+	octopus-b
+	octopus-a
+	reach
+	EOF
+	git log -n6 --decorate=short --pretty="tformat:%f%d" \
+		--decorate-refs="heads/octopus*" >actual &&
+	test_cmp expect.decorate actual &&
 	git log -n6 --decorate=short --pretty="tformat:%f%d" \
+		--decorate-refs-exclude="heads/octopus*" \
+		--decorate-refs="heads/octopus*" >actual &&
+	test_cmp expect.no-decorate actual &&
+	git -c log.excludeDecoration="heads/octopus*" log \
+		-n6 --decorate=short --pretty="tformat:%f%d" \
 		--decorate-refs="heads/octopus*" >actual &&
 	test_cmp expect.decorate actual
 '
@@ -787,6 +803,9 @@ test_expect_success 'decorate-refs-exclude with glob' '
 	EOF
 	git log -n6 --decorate=short --pretty="tformat:%f%d" \
 		--decorate-refs-exclude="heads/octopus*" >actual &&
+	test_cmp expect.decorate actual &&
+	git -c log.excludeDecoration="heads/octopus*" log \
+		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
 	test_cmp expect.decorate actual
 '
 
@@ -801,6 +820,9 @@ test_expect_success 'decorate-refs-exclude without globs' '
 	EOF
 	git log -n6 --decorate=short --pretty="tformat:%f%d" \
 		--decorate-refs-exclude="tags/reach" >actual &&
+	test_cmp expect.decorate actual &&
+	git -c log.excludeDecoration="tags/reach" log \
+		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
 	test_cmp expect.decorate actual
 '
 
@@ -816,11 +838,19 @@ test_expect_success 'multiple decorate-refs-exclude' '
 	git log -n6 --decorate=short --pretty="tformat:%f%d" \
 		--decorate-refs-exclude="heads/octopus*" \
 		--decorate-refs-exclude="tags/reach" >actual &&
+	test_cmp expect.decorate actual &&
+	git -c log.excludeDecoration="heads/octopus*" \
+		-c log.excludeDecoration="tags/reach" log \
+		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
+	test_cmp expect.decorate actual &&
+	git -c log.excludeDecoration="heads/octopus*" log \
+		--decorate-refs-exclude="tags/reach" \
+		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
 	test_cmp expect.decorate actual
 '
 
 test_expect_success 'decorate-refs and decorate-refs-exclude' '
-	cat >expect.decorate <<-\EOF &&
+	cat >expect.no-decorate <<-\EOF &&
 	Merge-tag-reach (master)
 	Merge-tags-octopus-a-and-octopus-b
 	seventh
@@ -831,6 +861,21 @@ test_expect_success 'decorate-refs and decorate-refs-exclude' '
 	git log -n6 --decorate=short --pretty="tformat:%f%d" \
 		--decorate-refs="heads/*" \
 		--decorate-refs-exclude="heads/oc*" >actual &&
+	test_cmp expect.no-decorate actual
+'
+
+test_expect_success 'deocrate-refs and log.excludeDecoration' '
+	cat >expect.decorate <<-\EOF &&
+	Merge-tag-reach (master)
+	Merge-tags-octopus-a-and-octopus-b
+	seventh
+	octopus-b (octopus-b)
+	octopus-a (octopus-a)
+	reach (reach)
+	EOF
+	git -c log.excludeDecoration="heads/oc*" log \
+		--decorate-refs="heads/*" \
+		-n6 --decorate=short --pretty="tformat:%f%d" >actual &&
 	test_cmp expect.decorate actual
 '
 
@@ -846,6 +891,10 @@ test_expect_success 'decorate-refs-exclude and simplify-by-decoration' '
 	git log -n6 --decorate=short --pretty="tformat:%f%d" \
 		--decorate-refs-exclude="*octopus*" \
 		--simplify-by-decoration >actual &&
+	test_cmp expect.decorate actual &&
+	git -c log.excludeDecoration="*octopus*" log \
+		-n6 --decorate=short --pretty="tformat:%f%d" \
+		--simplify-by-decoration >actual &&
 	test_cmp expect.decorate actual
 '
 
-- 
gitgitgadget

Re: [PATCH v3 2/2] log: add log.excludeDecoration config option

[Junio C Hamano]

"Derrick Stolee via GitGitGadget" <gitgitgadget@gmail.com> writes:

> diff --git a/log-tree.c b/log-tree.c
> index ab6d29a746b..fd3fd3316a1 100644
> --- a/log-tree.c
> +++ b/log-tree.c
> @@ -103,6 +103,8 @@ static int ref_filter_match(const char *refname,
>  	struct string_list_item *item;
>  	const struct string_list *exclude_patterns = filter->exclude_ref_pattern;
>  	const struct string_list *include_patterns = filter->include_ref_pattern;
> +	const struct string_list *exclude_patterns_config =
> +				filter->exclude_ref_config_pattern;
>  
>  	if (exclude_patterns && exclude_patterns->nr) {
>  		for_each_string_list_item(item, exclude_patterns) {
> @@ -112,17 +114,21 @@ static int ref_filter_match(const char *refname,
>  	}
>  
>  	if (include_patterns && include_patterns->nr) {
> -		int found = 0;
>  		for_each_string_list_item(item, include_patterns) {
>  			if (match_ref_pattern(refname, item)) {
> -				found = 1;
> -				break;
> +				return 1;
>  			}

Micronit.  

Let's mimick the early return in the loop above (for command line
excludes) and below (for configured excludes), each of which is just
a single "return" statement in a block without {braces} around.

Other than that, looks nicely done.

The new tests are really appreciated, too.

Re: [PATCH v3 2/2] log: add log.excludeDecoration config option

[Junio C Hamano]

Junio C Hamano <gitster@pobox.com> writes:

>>  	if (include_patterns && include_patterns->nr) {
>> -		int found = 0;
>>  		for_each_string_list_item(item, include_patterns) {
>>  			if (match_ref_pattern(refname, item)) {
>> -				found = 1;
>> -				break;
>> +				return 1;
>>  			}
>
> Micronit.  
>
> Let's mimick the early return in the loop above (for command line
> excludes) and below (for configured excludes), each of which is just
> a single "return" statement in a block without {braces} around.

... heh, it seems that the nit is mine in the suggested alternative
upthread.  Let me amend while queuing.

Thanks.

Re: [PATCH v3 2/2] log: add log.excludeDecoration config option

[Derrick Stolee]

On 4/16/2020 2:03 PM, Junio C Hamano wrote:
> Junio C Hamano <gitster@pobox.com> writes:
> 
>>>  	if (include_patterns && include_patterns->nr) {
>>> -		int found = 0;
>>>  		for_each_string_list_item(item, include_patterns) {
>>>  			if (match_ref_pattern(refname, item)) {
>>> -				found = 1;
>>> -				break;
>>> +				return 1;
>>>  			}
>>
>> Micronit.  
>>
>> Let's mimick the early return in the loop above (for command line
>> excludes) and below (for configured excludes), each of which is just
>> a single "return" statement in a block without {braces} around.
> 
> ... heh, it seems that the nit is mine in the suggested alternative
> upthread.  Let me amend while queuing.

Shame on me for not noticing. Thanks for the close look!

-Stolee

Re: [PATCH v3 2/2] log: add log.excludeDecoration config option

[Junio C Hamano]

Derrick Stolee <stolee@gmail.com> writes:

> On 4/16/2020 2:03 PM, Junio C Hamano wrote:
>> Junio C Hamano <gitster@pobox.com> writes:
>> 
>>>>  	if (include_patterns && include_patterns->nr) {
>>>> -		int found = 0;
>>>>  		for_each_string_list_item(item, include_patterns) {
>>>>  			if (match_ref_pattern(refname, item)) {
>>>> -				found = 1;
>>>> -				break;
>>>> +				return 1;
>>>>  			}
>>>
>>> Micronit.  
>>>
>>> Let's mimick the early return in the loop above (for command line
>>> excludes) and below (for configured excludes), each of which is just
>>> a single "return" statement in a block without {braces} around.
>> 
>> ... heh, it seems that the nit is mine in the suggested alternative
>> upthread.  Let me amend while queuing.
>
> Shame on me for not noticing. Thanks for the close look!

Heh, shame is mine, too ;-)

Thanks.