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hook API: support passing stdin to hooks, convert am's 'post-rewrite'

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Convert the invocation of the 'post-rewrite' hook run by 'git am' to
use the hook.h library. To do this we need to add a "path_to_stdin"
member to "struct run_hooks_opt".

In our API this is supported by asking for a file path, rather
than by reading stdin. Reading directly from stdin would involve caching
the entire stdin (to memory or to disk) once the hook API is made to
support "jobs" larger than 1, along with support for executing N hooks
at a time (i.e. the upcoming config-based hooks).

Signed-off-by: Emily Shaffer <emilyshaffer@google.com>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Emily Shaffer
2023-02-08 20:21:13 +01:00
committed by Junio C Hamano
parent 540267304d
commit 917e080249
3 changed files with 14 additions and 16 deletions
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5
hook.c
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@ -55,6 +55,11 @@ static int pick_next_hook(struct child_process *cp,
cp->no_stdin = 1;
strvec_pushv(&cp->env, hook_cb->options->env.v);
/* reopen the file for stdin; run_command closes it. */
if (hook_cb->options->path_to_stdin) {
cp->no_stdin = 0;
cp->in = xopen(hook_cb->options->path_to_stdin, O_RDONLY);
}
cp->stdout_to_stderr = 1;
cp->trace2_hook_name = hook_cb->hook_name;
cp->dir = hook_cb->options->dir;