[PATCH] hooks--pre-commit: detect non-ASCII when renaming

[PATCH] hooks--pre-commit: detect non-ASCII when renaming

[Julian Prein via GitGitGadget]

From: Julian Prein <druckdev@protonmail.com>

Currently the diff-filter that is used to check for non-ASCII characters
in filenames only checks new additions.

Extend the diff-filter in the pre-commit sample to include `CR` as well.
This way non-ASCII character in filenames are detected on a rename/copy
as well.

Signed-off-by: Julian Prein <druckdev@protonmail.com>
---
    hooks--pre-commit: detect non-ASCII when renaming

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-git-1291%2Fdruckdev%2Fpre-commit-renames-v1
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-git-1291/druckdev/pre-commit-renames-v1
Pull-Request: https://github.com/git/git/pull/1291

 templates/hooks--pre-commit.sample | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/templates/hooks--pre-commit.sample b/templates/hooks--pre-commit.sample
index e144712c85c..95c327832da 100755
--- a/templates/hooks--pre-commit.sample
+++ b/templates/hooks--pre-commit.sample
@@ -28,7 +28,7 @@ if [ "$allownonascii" != "true" ] &&
 	# Note that the use of brackets around a tr range is ok here, (it's
 	# even required, for portability to Solaris 10's /usr/bin/tr), since
 	# the square bracket bytes happen to fall in the designated range.
-	test $(git diff --cached --name-only --diff-filter=A -z $against |
+	test $(git diff --cached --name-only --diff-filter=ACR -z $against |
 	  LC_ALL=C tr -d '[ -~]\0' | wc -c) != 0
 then
 	cat <<\EOF

base-commit: bbea4dcf42b28eb7ce64a6306cdde875ae5d09ca
-- 
gitgitgadget

Re: [PATCH] hooks--pre-commit: detect non-ASCII when renaming

[Junio C Hamano]

"Julian Prein via GitGitGadget" <gitgitgadget@gmail.com> writes:

> From: Julian Prein <druckdev@protonmail.com>
>
> Currently the diff-filter that is used to check for non-ASCII characters
> in filenames only checks new additions.
>
> Extend the diff-filter in the pre-commit sample to include `CR` as well.
> This way non-ASCII character in filenames are detected on a rename/copy
> as well.

It would probably be a better implementation to disable the rename
detection, instead of adding Copies and Renames.

> Signed-off-by: Julian Prein <druckdev@protonmail.com>
> ---
>     hooks--pre-commit: detect non-ASCII when renaming
>
> Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-git-1291%2Fdruckdev%2Fpre-commit-renames-v1
> Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-git-1291/druckdev/pre-commit-renames-v1
> Pull-Request: https://github.com/git/git/pull/1291
>
>  templates/hooks--pre-commit.sample | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/templates/hooks--pre-commit.sample b/templates/hooks--pre-commit.sample
> index e144712c85c..95c327832da 100755
> --- a/templates/hooks--pre-commit.sample
> +++ b/templates/hooks--pre-commit.sample
> @@ -28,7 +28,7 @@ if [ "$allownonascii" != "true" ] &&
>  	# Note that the use of brackets around a tr range is ok here, (it's
>  	# even required, for portability to Solaris 10's /usr/bin/tr), since
>  	# the square bracket bytes happen to fall in the designated range.
> -	test $(git diff --cached --name-only --diff-filter=A -z $against |
> +	test $(git diff --cached --name-only --diff-filter=ACR -z $against |
>  	  LC_ALL=C tr -d '[ -~]\0' | wc -c) != 0
>  then
>  	cat <<\EOF
>
> base-commit: bbea4dcf42b28eb7ce64a6306cdde875ae5d09ca

Re: [PATCH] hooks--pre-commit: detect non-ASCII when renaming

[Junio C Hamano]

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

> "Julian Prein via GitGitGadget" <gitgitgadget@gmail.com> writes:
>
>> From: Julian Prein <druckdev@protonmail.com>
>>
>> Currently the diff-filter that is used to check for non-ASCII characters
>> in filenames only checks new additions.
>>
>> Extend the diff-filter in the pre-commit sample to include `CR` as well.
>> This way non-ASCII character in filenames are detected on a rename/copy
>> as well.
>
> It would probably be a better implementation to disable the rename
> detection, instead of adding Copies and Renames.

That is ...

>> -	test $(git diff --cached --name-only --diff-filter=A -z $against |

... instead of using the "git diff" Porcelain, we can probably use
the "git diff-index" plumbing command here, which will not be
affected by end-user configuration or by the fact that recent "git
diff" turns on the rename detection by default.

[PATCH v2] hooks--pre-commit: detect non-ASCII when renaming

[Julian Prein via GitGitGadget]

From: Julian Prein <druckdev@protonmail.com>

When diff.renames is turned on, the diff-filter will not return renamed
files (or copied ones with diff.renames=copy) and potential non-ASCII
characters would not be caught by this hook.

Use the plumbing command diff-index instead of the porcelain one to not
be affected by diff.rename.

Signed-off-by: Julian Prein <druckdev@protonmail.com>
---
    hooks--pre-commit: detect non-ASCII when renaming
    
    A bit later than I expected, but here is v2.
    
    Changes since v1:
    
     * Switched to using diff-index and back to just the A filter as
       suggested by Junio C Hamano

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-git-1291%2Fdruckdev%2Fpre-commit-renames-v2
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-git-1291/druckdev/pre-commit-renames-v2
Pull-Request: https://github.com/git/git/pull/1291

Range-diff vs v1:

 1:  101f327a040 ! 1:  1f6ca0dd3eb hooks--pre-commit: detect non-ASCII when renaming
     @@ Metadata
       ## Commit message ##
          hooks--pre-commit: detect non-ASCII when renaming
      
     -    Currently the diff-filter that is used to check for non-ASCII characters
     -    in filenames only checks new additions.
     +    When diff.renames is turned on, the diff-filter will not return renamed
     +    files (or copied ones with diff.renames=copy) and potential non-ASCII
     +    characters would not be caught by this hook.
      
     -    Extend the diff-filter in the pre-commit sample to include `CR` as well.
     -    This way non-ASCII character in filenames are detected on a rename/copy
     -    as well.
     +    Use the plumbing command diff-index instead of the porcelain one to not
     +    be affected by diff.rename.
      
          Signed-off-by: Julian Prein <druckdev@protonmail.com>
      
     @@ templates/hooks--pre-commit.sample: if [ "$allownonascii" != "true" ] &&
       	# even required, for portability to Solaris 10's /usr/bin/tr), since
       	# the square bracket bytes happen to fall in the designated range.
      -	test $(git diff --cached --name-only --diff-filter=A -z $against |
     -+	test $(git diff --cached --name-only --diff-filter=ACR -z $against |
     ++	test $(git diff-index --cached --name-only --diff-filter=A -z $against |
       	  LC_ALL=C tr -d '[ -~]\0' | wc -c) != 0
       then
       	cat <<\EOF


 templates/hooks--pre-commit.sample | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/templates/hooks--pre-commit.sample b/templates/hooks--pre-commit.sample
index e144712c85c..29ed5ee486a 100755
--- a/templates/hooks--pre-commit.sample
+++ b/templates/hooks--pre-commit.sample
@@ -28,7 +28,7 @@ if [ "$allownonascii" != "true" ] &&
 	# Note that the use of brackets around a tr range is ok here, (it's
 	# even required, for portability to Solaris 10's /usr/bin/tr), since
 	# the square bracket bytes happen to fall in the designated range.
-	test $(git diff --cached --name-only --diff-filter=A -z $against |
+	test $(git diff-index --cached --name-only --diff-filter=A -z $against |
 	  LC_ALL=C tr -d '[ -~]\0' | wc -c) != 0
 then
 	cat <<\EOF

base-commit: 61a22ddaf0626111193a17ac12f366bd6d167dff
-- 
gitgitgadget

Re: [PATCH v2] hooks--pre-commit: detect non-ASCII when renaming

[Junio C Hamano]

"Julian Prein via GitGitGadget" <gitgitgadget@gmail.com> writes:

> From: Julian Prein <druckdev@protonmail.com>
>
> When diff.renames is turned on, the diff-filter will not return renamed
> files (or copied ones with diff.renames=copy) and potential non-ASCII
> characters would not be caught by this hook.
>
> Use the plumbing command diff-index instead of the porcelain one to not
> be affected by diff.rename.

Makes sense.

An obvious alternative would be to pass "--no-renames" and keep
using the Porcelain "git diff", but this is how the plumbing
"diff-index" and friends are meant to be used.  Looking good.

Will queue.  Thanks.