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Make git-diff-tree indicate when it flushes

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There are times when gitk needs to know that the commits it has sent
to git-diff-tree --stdin did not match, and it needs to know in a
timely fashion even if none of them match.  At the moment,
git-diff-tree outputs nothing for non-matching commits, so it is
impossible for gitk to distinguish between git-diff-tree being slow
and git-diff-tree saying no.

This makes git-diff-tree flush its output and echo back the
input line when it is not a valid-looking object name.  Gitk, or
other users of git-diff-tree --stdin, can use a blank line or
any other "marker line" to indicate that git-diff-tree has
processed all the commits on its input up to the echoed back
marker line, and any commits that have not been output do not
match.

[jc: re-done after a couple of back-and-forth discussion on the list.]

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Paul Mackerras 2006-05-29 19:01:38 -07:00 committed by Junio C Hamano
parent 22669a045a
commit e0c97ca63d
1 changed files with 7 additions and 3 deletions
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10
builtin-diff-tree.c
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@ -138,11 +138,15 @@ int cmd_diff_tree(int argc, const char **argv, char **envp)
if (opt->diffopt.detect_rename)
opt->diffopt.setup |= (DIFF_SETUP_USE_SIZE_CACHE |
DIFF_SETUP_USE_CACHE);
while (fgets(line, sizeof(line), stdin))
if (line[0] == '\n')
while (fgets(line, sizeof(line), stdin)) {
unsigned char sha1[20];
if (get_sha1_hex(line, sha1)) {
fputs(line, stdout);
fflush(stdout);
}
else
diff_tree_stdin(line);
}
return 0;
}