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git-commit: exit non-zero if we fail to commit the index

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In certain rare cases, the creation of the commit object
and update of HEAD can succeed, but then installing the
updated index will fail. This is most likely caused by a
full disk or exceeded disk quota. When this happens the
new index file will be removed, and the repository will
be left with the original now-out-of-sync index. The
user can recover with a "git reset HEAD" once the disk
space issue is resolved.

We should detect this failure and offer the user some
helpful guidance.

Signed-off-by: Brandon Casey <casey@nrlssc.navy.mil>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Brandon Casey 2008-01-23 11:21:22 -06:00 committed by Junio C Hamano
parent 28678b4f2f
commit 5a9dd3998f
1 changed files with 11 additions and 4 deletions
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15
builtin-commit.c
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@ -122,19 +122,23 @@ static void rollback_index_files(void)
}
}
static void commit_index_files(void)
static int commit_index_files(void)
{
int err = 0;
switch (commit_style) {
case COMMIT_AS_IS:
break; /* nothing to do */
case COMMIT_NORMAL:
commit_lock_file(&index_lock);
err = commit_lock_file(&index_lock);
break;
case COMMIT_PARTIAL:
commit_lock_file(&index_lock);
err = commit_lock_file(&index_lock);
rollback_lock_file(&false_lock);
break;
}
return err;
}
/*
@ -926,7 +930,10 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
unlink(git_path("MERGE_HEAD"));
unlink(git_path("MERGE_MSG"));
commit_index_files();
if (commit_index_files())
die ("Repository has been updated, but unable to write\n"
"new_index file. Check that disk is not full or quota is\n"
"not exceeded, and then \"git reset HEAD\" to recover.");
rerere();
run_hook(get_index_file(), "post-commit", NULL);