path: root/diff.h
diff options
authorJunio C Hamano <>2010-08-23 17:17:03 (GMT)
committerJunio C Hamano <>2010-08-31 21:30:29 (GMT)
commitf506b8e8b5fb231e63b69668b6b7516f12b32228 (patch)
tree02a300dcd882e8ee1d921345250dbe48702da0fe /diff.h
parent382f013bc40452e4c24b8698217a14ff35f6dcec (diff)
git log/diff: add -G<regexp> that greps in the patch text
Teach "-G<regexp>" that is similar to "-S<regexp> --pickaxe-regexp" to the "git diff" family of commands. This limits the diff queue to filepairs whose patch text actually has an added or a deleted line that matches the given regexp. Unlike "-S<regexp>", changing other parts of the line that has a substring that matches the given regexp IS counted as a change, as such a change would appear as one deletion followed by one addition in a patch text. Unlike -S (pickaxe) that is intended to be used to quickly detect a commit that changes the number of occurrences of hits between the preimage and the postimage to serve as a part of larger toolchain, this is meant to be used as the top-level Porcelain feature. The implementation unfortunately has to run "diff" twice if you are running "log" family of commands to produce patches in the final output (e.g. "git log -p" or "git format-patch"). I think we _could_ cache the result in-core if we wanted to, but that would require larger surgery to the diffcore machinery (i.e. adding an extra pointer in the filepair structure to keep a pointer to a strbuf around, stuff the textual diff to the strbuf inside diffgrep_consume(), and make use of it in later stages when it is available) and it may not be worth it. Signed-off-by: Junio C Hamano <>
Diffstat (limited to 'diff.h')
1 files changed, 3 insertions, 0 deletions
diff --git a/diff.h b/diff.h
index bf2f44d..1fd44f5 100644
--- a/diff.h
+++ b/diff.h
@@ -238,6 +238,9 @@ extern int diff_setup_done(struct diff_options *);
+#define DIFF_PICKAXE_KIND_S 4 /* traditional plumbing counter */
+#define DIFF_PICKAXE_KIND_G 8 /* grep in the patch */
extern void diffcore_std(struct diff_options *);
extern void diffcore_fix_diff_index(struct diff_options *);