The code notices that the caller does not want any detail of the changes and only wants to know if there is a change or not by specifying --quiet. And it breaks out of the loop when it knows it already found any change. When you have a post-process filter (e.g. --diff-filter), however, the path we found to be different in the previous round and set HAS_CHANGES bit may end up being uninteresting, and there may be no output at the end. The optimization needs to be disabled for such case. Note that the f245194 (diff: change semantics of "ignore whitespace" options, 2009-05-22) already disables this optimization by refraining from setting HAS_CHANGES when post-process filters that need to inspect the contents of the files (e.g. -S, -w) in diff_change() function. Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx> --- * This time with tests, on top of 90b1994 (diff: Rename QUIET internal option to QUICK, 2009-05-23), which was the last commit in the series that introduced the incorrect optimization in the first place. Note that the test script was renamed to t/t4040 in today's codebase, but it merges cleanly. diff-lib.c | 3 ++- t/t4037-whitespace-status.sh | 7 +++++++ 2 files changed, 9 insertions(+), 1 deletions(-) diff --git a/diff-lib.c b/diff-lib.c index b7813af..bfa6503 100644 --- a/diff-lib.c +++ b/diff-lib.c @@ -74,7 +74,8 @@ int run_diff_files(struct rev_info *revs, unsigned int option) int changed; if (DIFF_OPT_TST(&revs->diffopt, QUICK) && - DIFF_OPT_TST(&revs->diffopt, HAS_CHANGES)) + !revs->diffopt.filter && + DIFF_OPT_TST(&revs->diffopt, HAS_CHANGES)) break; if (!ce_path_match(ce, revs->prune_data)) diff --git a/t/t4037-whitespace-status.sh b/t/t4037-whitespace-status.sh index a30b03b..abc4934 100755 --- a/t/t4037-whitespace-status.sh +++ b/t/t4037-whitespace-status.sh @@ -60,4 +60,11 @@ test_expect_success 'diff-files -b -p --exit-code' ' git diff-files -b -p --exit-code ' +test_expect_success 'diff-files --diff-filter --quiet' ' + git reset --hard && + rm a/d && + echo x >>b/e && + test_must_fail git diff-files --diff-filter=M --quiet +' + test_done -- 1.7.4.1.430.g5aa4d -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html