path: root/builtin
diff options
authorbrian m. carlson <>2015-12-15 01:52:04 (GMT)
committerJunio C Hamano <>2015-12-15 18:03:40 (GMT)
commit3a30aa17879b08f96262abb9a22c7bbe8f56e4c9 (patch)
treeace01289693a796bfb19661e6ed78d1b81381859 /builtin
parent3e56e7245c37ce57dde72ec74ee2df41ce603dda (diff)
format-patch: add an option to suppress commit hash
Oftentimes, patches created by git format-patch will be stored in version control or compared with diff. In these cases, two otherwise identical patches can have different commit hashes, leading to diff noise. Teach git format-patch a --zero-commit option that instead produces an all-zero hash to avoid this diff noise. Signed-off-by: brian m. carlson <> Signed-off-by: Junio C Hamano <>
Diffstat (limited to 'builtin')
1 files changed, 5 insertions, 0 deletions
diff --git a/builtin/log.c b/builtin/log.c
index 069bd3a..e00cea7 100644
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -1196,6 +1196,7 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
int cover_letter = -1;
int boundary_count = 0;
int no_binary_diff = 0;
+ int zero_commit = 0;
struct commit *origin = NULL;
const char *in_reply_to = NULL;
struct patch_ids ids;
@@ -1236,6 +1237,8 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
OPT_BOOL(0, "no-binary", &no_binary_diff,
N_("don't output binary diffs")),
+ OPT_BOOL(0, "zero-commit", &zero_commit,
+ N_("output all-zero hash in From header")),
OPT_BOOL(0, "ignore-if-in-upstream", &ignore_if_in_upstream,
N_("don't include a patch matching a commit upstream")),
{ OPTION_SET_INT, 'p', "no-stat", &use_patch_format, NULL,
@@ -1380,6 +1383,8 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
/* Always generate a patch */
rev.diffopt.output_format |= DIFF_FORMAT_PATCH;
+ rev.zero_commit = zero_commit;
if (!DIFF_OPT_TST(&rev.diffopt, TEXT) && !no_binary_diff)
DIFF_OPT_SET(&rev.diffopt, BINARY);