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read-cache: add post-index-change hook

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Add a post-index-change hook that is invoked after the index is written in
do_write_locked_index().

This hook is meant primarily for notification, and cannot affect
the outcome of git commands that trigger the index write.

The hook is passed a flag to indicate whether the working directory was
updated or not and a flag indicating if a skip-worktree bit could have
changed.  These flags enable the hook to optimize its response to the
index change notification.

Signed-off-by: Ben Peart <benpeart@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Ben Peart
2019-02-15 12:59:21 -05:00
committed by Junio C Hamano
parent 8989e1950a
commit 1956ecd0ab
7 changed files with 182 additions and 3 deletions
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14
read-cache.c
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@ -17,6 +17,7 @@
#include "commit.h"
#include "blob.h"
#include "resolve-undo.h"
#include "run-command.h"
#include "strbuf.h"
#include "varint.h"
#include "split-index.h"
@ -2999,8 +3000,17 @@ static int do_write_locked_index(struct index_state *istate, struct lock_file *l
if (ret)
return ret;
if (flags & COMMIT_LOCK)
return commit_locked_index(lock);
return close_lock_file_gently(lock);
ret = commit_locked_index(lock);
else
ret = close_lock_file_gently(lock);
run_hook_le(NULL, "post-index-change",
istate->updated_workdir ? "1" : "0",
istate->updated_skipworktree ? "1" : "0", NULL);
istate->updated_workdir = 0;
istate->updated_skipworktree = 0;
return ret;
}
static int write_split_index(struct index_state *istate,