From: Jeff Hostetler <git@jeffhostetler.com>
To: Johannes Schindelin via GitGitGadget <gitgitgadget@gmail.com>,
git@vger.kernel.org
Cc: Junio C Hamano <gitster@pobox.com>,
Johannes Schindelin <johannes.schindelin@gmx.de>
Subject: Re: [PATCH 01/11] Start to implement a built-in version of `git add --interactive`
Date: Thu, 18 Apr 2019 10:31:30 -0400 [thread overview]
Message-ID: <3149b9ba-2f5a-46ce-ad89-4105ec217795@jeffhostetler.com> (raw)
In-Reply-To: <12978dc248a2cd07c90559691b8a2add84f45394.1554917868.git.gitgitgadget@gmail.com>
On 4/10/2019 1:37 PM, Johannes Schindelin via GitGitGadget wrote:
> From: Johannes Schindelin <johannes.schindelin@gmx.de>
>
> This is hardly the first conversion of a Git command that is implemented
> as a script to a built-in. So far, the most successful strategy for such
> conversions has been to add a built-in helper and call that for more and
> more functionality from the script, as more and more parts are
> converted.
>
> With the interactive add, we choose a different strategy. The sole
> reason for this is that on Windows (where such a conversion has the most
> benefits in terms of speed and robustness) we face the very specific
> problem that a `system()` call in Perl seems to close `stdin` in the
> parent process when the spawned process consumes even one character from
> `stdin`. And that just does not work for us here, as it would stop the
> main loop as soon as any interactive command was performed by the
> helper. Which is almost all of the commands in `git add -i`.
>
> It is almost as if Perl told us once again that it does not want us to
> use it on Windows.
>
> Instead, we follow the opposite route where we start with a bare-bones
> version of the built-in interactive add, guarded by the new
> `add.interactive.useBuiltin` config variable, and then add more and more
> functionality to it, until it is feature complete.
>
> At this point, the built-in version of `git add -i` only states that it
> cannot do anything yet ;-)
>
> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
> ---
> Documentation/config/add.txt | 5 +++++
> Makefile | 1 +
> add-interactive.c | 13 +++++++++++++
> add-interactive.h | 10 ++++++++++
> builtin/add.c | 16 +++++++++++++++-
> t/README | 4 ++++
> 6 files changed, 48 insertions(+), 1 deletion(-)
> create mode 100644 add-interactive.c
> create mode 100644 add-interactive.h
>
> diff --git a/Documentation/config/add.txt b/Documentation/config/add.txt
> index 4d753f006e..c9f748f81c 100644
> --- a/Documentation/config/add.txt
> +++ b/Documentation/config/add.txt
> @@ -5,3 +5,8 @@ add.ignore-errors (deprecated)::
> option of linkgit:git-add[1]. `add.ignore-errors` is deprecated,
> as it does not follow the usual naming convention for configuration
> variables.
> +
> +add.interactive.useBuiltin::
> + [EXPERIMENTAL] Set to `true` to use the experimental built-in
> + implementation of the interactive version of linkgit:git-add[1]
> + instead of the Perl script version. Is `false` by default.
> diff --git a/Makefile b/Makefile
> index c5240942f2..18e656a32f 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -848,6 +848,7 @@ LIB_H = $(shell $(FIND) . \
> -name '*.h' -print)
>
> LIB_OBJS += abspath.o
> +LIB_OBJS += add-interactive.o
> LIB_OBJS += advice.o
> LIB_OBJS += alias.o
> LIB_OBJS += alloc.o
> diff --git a/add-interactive.c b/add-interactive.c
> new file mode 100644
> index 0000000000..540bf185d8
> --- /dev/null
> +++ b/add-interactive.c
> @@ -0,0 +1,13 @@
> +#include "cache.h"
> +#include "add-interactive.h"
> +#include "config.h"
> +
> +int add_i_config(const char *var, const char *value, void *cb)
> +{
> + return git_default_config(var, value, cb);
> +}
[...]
> diff --git a/builtin/add.c b/builtin/add.c
> index db2dfa4350..5a32a755c8 100644
> --- a/builtin/add.c
> +++ b/builtin/add.c
[...]
> +static int use_builtin_add_i;
[...]
> @@ -319,7 +324,12 @@ static int add_config(const char *var, const char *value, void *cb)
> ignore_add_errors = git_config_bool(var, value);
> return 0;
> }
> - return git_default_config(var, value, cb);
> + if (!strcmp(var, "add.interactive.usebuiltin")) {
> + use_builtin_add_i = git_config_bool(var, value);
> + return 0;
> + }
> +
> + return add_i_config(var, value, cb);
> }
Something about this split between add_config() in this file
and add_i_config() in add-interactive.c bothers me. I'm not
saying it is wrong, but it bothers me.
Perhaps it is that we moved the call to git_default_config()
to add-interactive.c -- so correct behavior of the non-interactive
case depends on add-interactive.c to do the right thing.
Also, since we can't control the order of observed the k/v pairs,
we can't do "if (use_builtin_add_i) return add_i_config(...);"
And that wouldn't allow both versions to pickup a common config
setting (in their own static variables).
Currently, neither function looks at any other k/v pairs, so
this is a bit of a moot point, but I'm wondering if this should
look like this:
int add_config(...)
{
// give add-interactive.c a chance to look at k/v pair, but
// do not short-cut because we don't know yet whether we
// will be interactive or not yet.
(void)add_i_config(...);
...ignore_add_errors...
...use_builtin_add_i...
return git_default_config(...);
}
int add_i_config(...)
{
return 0;
}
or just inline everything here in add_config() and be done with it.
Jeff
next prev parent reply other threads:[~2019-04-18 14:31 UTC|newest]
Thread overview: 124+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-10 17:37 [PATCH 00/11] git add -i: add a rudimentary version in C (supporting only status and help so far) Johannes Schindelin via GitGitGadget
2019-04-10 17:37 ` [PATCH 01/11] Start to implement a built-in version of `git add --interactive` Johannes Schindelin via GitGitGadget
2019-04-18 14:31 ` Jeff Hostetler [this message]
2019-04-18 16:06 ` Jeff King
2019-04-30 23:40 ` Johannes Schindelin
2019-05-01 2:21 ` Jeff King
2019-05-13 11:14 ` Johannes Schindelin
2019-04-10 17:37 ` [PATCH 02/11] diff: export diffstat interface Daniel Ferreira via GitGitGadget
2019-04-10 17:37 ` [PATCH 03/11] built-in add -i: implement the `status` command Daniel Ferreira via GitGitGadget
2019-04-10 17:37 ` [PATCH 04/11] built-in add -i: refresh the index before running `status` Johannes Schindelin via GitGitGadget
2019-04-10 17:37 ` [PATCH 05/11] built-in add -i: color the header in the `status` command Johannes Schindelin via GitGitGadget
2019-04-10 17:37 ` [PATCH 06/11] built-in add -i: implement the main loop Johannes Schindelin via GitGitGadget
2019-04-18 16:49 ` Jeff Hostetler
2019-05-13 12:04 ` Johannes Schindelin
2019-04-10 17:37 ` [PATCH 07/11] Add a function to determine unique prefixes for a list of strings Slavica Djukic via GitGitGadget
2019-04-18 17:57 ` Jeff Hostetler
2019-05-13 12:48 ` Johannes Schindelin
2019-04-10 17:37 ` [PATCH 08/11] built-in add -i: show unique prefixes of the commands Slavica Djukic via GitGitGadget
2019-04-10 17:37 ` [PATCH 09/11] built-in add -i: support `?` (prompt help) Johannes Schindelin via GitGitGadget
2019-04-10 17:37 ` [PATCH 10/11] built-in add -i: use color in the main loop Slavica Djukic via GitGitGadget
2019-04-10 17:37 ` [PATCH 11/11] built-in add -i: implement the `help` command Johannes Schindelin via GitGitGadget
2019-05-13 17:27 ` [PATCH v2 00/11] git add -i: add a rudimentary version in C (supporting only status and help so far) Johannes Schindelin via GitGitGadget
2019-05-13 17:27 ` [PATCH v2 01/11] Start to implement a built-in version of `git add --interactive` Johannes Schindelin via GitGitGadget
2019-05-13 17:27 ` [PATCH v2 02/11] diff: export diffstat interface Daniel Ferreira via GitGitGadget
2019-05-13 17:27 ` [PATCH v2 03/11] built-in add -i: implement the `status` command Daniel Ferreira via GitGitGadget
2019-05-13 17:27 ` [PATCH v2 04/11] built-in add -i: refresh the index before running `status` Johannes Schindelin via GitGitGadget
2019-05-13 17:27 ` [PATCH v2 05/11] built-in add -i: color the header in the `status` command Johannes Schindelin via GitGitGadget
2019-05-13 17:27 ` [PATCH v2 06/11] built-in add -i: implement the main loop Johannes Schindelin via GitGitGadget
2019-05-13 17:27 ` [PATCH v2 07/11] Add a function to determine unique prefixes for a list of strings Slavica Djukic via GitGitGadget
2019-05-13 17:27 ` [PATCH v2 08/11] built-in add -i: show unique prefixes of the commands Slavica Djukic via GitGitGadget
2019-05-13 17:28 ` [PATCH v2 09/11] built-in add -i: support `?` (prompt help) Johannes Schindelin via GitGitGadget
2019-05-13 17:28 ` [PATCH v2 10/11] built-in add -i: use color in the main loop Slavica Djukic via GitGitGadget
2019-05-13 17:28 ` [PATCH v2 11/11] built-in add -i: implement the `help` command Johannes Schindelin via GitGitGadget
2019-07-16 14:58 ` [PATCH v3 00/11] git add -i: add a rudimentary version in C (supporting only status and help so far) Johannes Schindelin via GitGitGadget
2019-07-16 14:58 ` [PATCH v3 01/11] Start to implement a built-in version of `git add --interactive` Johannes Schindelin via GitGitGadget
2019-07-31 17:52 ` Junio C Hamano
2019-08-26 21:26 ` Johannes Schindelin
2019-08-27 22:25 ` Junio C Hamano
2019-08-28 15:06 ` Johannes Schindelin
2019-08-28 15:37 ` Junio C Hamano
2019-07-16 14:58 ` [PATCH v3 03/11] built-in add -i: implement the `status` command Daniel Ferreira via GitGitGadget
2019-07-31 18:12 ` Junio C Hamano
2019-08-27 10:04 ` Johannes Schindelin
2019-07-16 14:58 ` [PATCH v3 02/11] diff: export diffstat interface Daniel Ferreira via GitGitGadget
2019-07-31 17:59 ` Junio C Hamano
2019-08-27 9:22 ` Johannes Schindelin
2019-07-16 14:58 ` [PATCH v3 04/11] built-in add -i: refresh the index before running `status` Johannes Schindelin via GitGitGadget
2019-07-16 14:58 ` [PATCH v3 05/11] built-in add -i: color the header in the `status` command Johannes Schindelin via GitGitGadget
2019-07-16 14:58 ` [PATCH v3 06/11] built-in add -i: implement the main loop Johannes Schindelin via GitGitGadget
2019-07-31 18:14 ` Junio C Hamano
2019-07-16 14:58 ` [PATCH v3 08/11] built-in add -i: show unique prefixes of the commands Slavica Djukic via GitGitGadget
2019-07-16 14:58 ` [PATCH v3 07/11] Add a function to determine unique prefixes for a list of strings Slavica Djukic via GitGitGadget
2019-07-31 18:39 ` Junio C Hamano
2019-08-24 12:38 ` SZEDER Gábor
2019-08-27 12:14 ` Johannes Schindelin
2019-08-28 16:30 ` SZEDER Gábor
2019-08-28 16:34 ` [PATCH] [PoC] A simpler find_unique_prefixes() implementation SZEDER Gábor
2019-08-30 20:12 ` Johannes Schindelin
2019-07-16 14:58 ` [PATCH v3 09/11] built-in add -i: support `?` (prompt help) Johannes Schindelin via GitGitGadget
2019-07-16 14:58 ` [PATCH v3 10/11] built-in add -i: use color in the main loop Slavica Djukic via GitGitGadget
2019-07-16 14:58 ` [PATCH v3 11/11] built-in add -i: implement the `help` command Johannes Schindelin via GitGitGadget
2019-08-02 21:04 ` Junio C Hamano
2019-08-02 22:26 ` Jeff King
2019-07-16 18:38 ` [PATCH v3 00/11] git add -i: add a rudimentary version in C (supporting only status and help so far) Johannes Schindelin
2019-08-02 21:06 ` Junio C Hamano
2019-08-27 12:57 ` [PATCH v4 " Johannes Schindelin via GitGitGadget
2019-08-27 12:57 ` [PATCH v4 01/11] Start to implement a built-in version of `git add --interactive` Johannes Schindelin via GitGitGadget
2019-08-27 12:57 ` [PATCH v4 02/11] diff: export diffstat interface Daniel Ferreira via GitGitGadget
2019-08-27 12:57 ` [PATCH v4 03/11] built-in add -i: implement the `status` command Daniel Ferreira via GitGitGadget
2019-08-27 12:57 ` [PATCH v4 04/11] built-in add -i: refresh the index before running `status` Johannes Schindelin via GitGitGadget
2019-08-27 12:57 ` [PATCH v4 05/11] built-in add -i: color the header in the `status` command Johannes Schindelin via GitGitGadget
2019-08-27 12:57 ` [PATCH v4 07/11] Add a function to determine unique prefixes for a list of strings Slavica Djukic via GitGitGadget
2019-08-27 12:57 ` [PATCH v4 06/11] built-in add -i: implement the main loop Johannes Schindelin via GitGitGadget
2019-08-27 12:57 ` [PATCH v4 08/11] built-in add -i: show unique prefixes of the commands Slavica Djukic via GitGitGadget
2019-08-27 12:58 ` [PATCH v4 09/11] built-in add -i: support `?` (prompt help) Johannes Schindelin via GitGitGadget
2019-08-27 12:58 ` [PATCH v4 11/11] built-in add -i: implement the `help` command Johannes Schindelin via GitGitGadget
2019-08-27 12:58 ` [PATCH v4 10/11] built-in add -i: use color in the main loop Slavica Djukic via GitGitGadget
2019-11-04 12:15 ` [PATCH v5 0/9] git add -i: add a rudimentary version in C (supporting only status and help so far) Johannes Schindelin via GitGitGadget
2019-11-04 12:15 ` [PATCH v5 1/9] Start to implement a built-in version of `git add --interactive` Johannes Schindelin via GitGitGadget
2019-11-08 4:49 ` Junio C Hamano
2019-11-09 11:06 ` Johannes Schindelin
2019-11-10 7:18 ` Junio C Hamano
2019-11-11 9:15 ` Johannes Schindelin
2019-11-11 12:09 ` Junio C Hamano
2019-11-12 15:03 ` Johannes Schindelin
2019-11-13 3:54 ` Junio C Hamano
2019-11-13 12:30 ` Johannes Schindelin
2019-11-13 14:01 ` Junio C Hamano
2019-11-04 12:15 ` [PATCH v5 2/9] diff: export diffstat interface Daniel Ferreira via GitGitGadget
2019-11-08 4:56 ` Junio C Hamano
2019-11-04 12:15 ` [PATCH v5 3/9] built-in add -i: implement the `status` command Daniel Ferreira via GitGitGadget
2019-11-08 5:01 ` Junio C Hamano
2019-11-04 12:15 ` [PATCH v5 4/9] built-in add -i: color the header in " Slavica Đukić via GitGitGadget
2019-11-04 12:15 ` [PATCH v5 5/9] built-in add -i: implement the main loop Johannes Schindelin via GitGitGadget
2019-11-08 5:17 ` Junio C Hamano
2019-11-09 11:21 ` Johannes Schindelin
2019-11-04 12:15 ` [PATCH v5 6/9] built-in add -i: show unique prefixes of the commands Johannes Schindelin via GitGitGadget
2019-11-04 12:15 ` [PATCH v5 7/9] built-in add -i: support `?` (prompt help) Johannes Schindelin via GitGitGadget
2019-11-04 12:15 ` [PATCH v5 8/9] built-in add -i: use color in the main loop Slavica Đukić via GitGitGadget
2019-11-04 12:15 ` [PATCH v5 9/9] built-in add -i: implement the `help` command Slavica Đukić via GitGitGadget
2019-11-13 12:40 ` [PATCH v6 0/9] git add -i: add a rudimentary version in C (supporting only status and help so far) Johannes Schindelin via GitGitGadget
2019-11-13 12:40 ` [PATCH v6 1/9] Start to implement a built-in version of `git add --interactive` Johannes Schindelin via GitGitGadget
2019-11-14 2:15 ` Junio C Hamano
2019-11-14 15:07 ` Johannes Schindelin
2019-11-15 4:35 ` Junio C Hamano
2019-11-13 12:40 ` [PATCH v6 2/9] diff: export diffstat interface Daniel Ferreira via GitGitGadget
2019-11-13 12:40 ` [PATCH v6 3/9] built-in add -i: implement the `status` command Daniel Ferreira via GitGitGadget
2019-11-13 12:41 ` [PATCH v6 4/9] built-in add -i: color the header in " Slavica Đukić via GitGitGadget
2019-11-13 12:41 ` [PATCH v6 5/9] built-in add -i: implement the main loop Johannes Schindelin via GitGitGadget
2019-11-13 12:41 ` [PATCH v6 6/9] built-in add -i: show unique prefixes of the commands Johannes Schindelin via GitGitGadget
2019-11-13 12:41 ` [PATCH v6 7/9] built-in add -i: support `?` (prompt help) Johannes Schindelin via GitGitGadget
2019-11-13 12:41 ` [PATCH v6 8/9] built-in add -i: use color in the main loop Slavica Đukić via GitGitGadget
2019-11-13 12:41 ` [PATCH v6 9/9] built-in add -i: implement the `help` command Slavica Đukić via GitGitGadget
2019-11-13 12:46 ` [PATCH v6 0/9] git add -i: add a rudimentary version in C (supporting only status and help so far) Johannes Schindelin
2019-11-15 11:11 ` [PATCH v7 " Johannes Schindelin via GitGitGadget
2019-11-15 11:11 ` [PATCH v7 1/9] Start to implement a built-in version of `git add --interactive` Johannes Schindelin via GitGitGadget
2019-11-15 11:11 ` [PATCH v7 2/9] diff: export diffstat interface Daniel Ferreira via GitGitGadget
2019-11-15 11:11 ` [PATCH v7 3/9] built-in add -i: implement the `status` command Daniel Ferreira via GitGitGadget
2019-11-15 11:11 ` [PATCH v7 4/9] built-in add -i: color the header in " Slavica Đukić via GitGitGadget
2019-11-15 11:11 ` [PATCH v7 5/9] built-in add -i: implement the main loop Johannes Schindelin via GitGitGadget
2019-11-15 11:11 ` [PATCH v7 6/9] built-in add -i: show unique prefixes of the commands Johannes Schindelin via GitGitGadget
2019-11-15 11:11 ` [PATCH v7 7/9] built-in add -i: support `?` (prompt help) Johannes Schindelin via GitGitGadget
2019-11-15 11:11 ` [PATCH v7 8/9] built-in add -i: use color in the main loop Slavica Đukić via GitGitGadget
2019-11-15 11:11 ` [PATCH v7 9/9] built-in add -i: implement the `help` command Slavica Đukić via GitGitGadget
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