diff options
author | Stephen Boyd <sboyd@kernel.org> | 2019-04-27 02:51:57 +0300 |
---|---|---|
committer | Junio C Hamano <gitster@pobox.com> | 2019-05-08 13:27:43 +0300 |
commit | a8f6855f48fd474719e92eecc66c29a28fdc0f46 (patch) | |
tree | 5ff4baed03ea6955b7f3c6b1b0f89b862e2f61c5 /diff.c | |
parent | 6f93d261fa8ca6a84c2e03e20558c0ddca3c05c3 (diff) |
format-patch: make --base patch-id output stable
We weren't flushing the context each time we processed a hunk in the
patch-id generation code in diff.c, but we were doing that when we
generated "stable" patch-ids with the 'patch-id' tool. Let's port that
similar logic over from patch-id.c into diff.c so we can get the same
hash when we're generating patch-ids for 'format-patch --base=' types of
command invocations.
Cc: Xiaolong Ye <xiaolong.ye@intel.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'diff.c')
-rw-r--r-- | diff.c | 32 |
1 files changed, 27 insertions, 5 deletions
@@ -5988,6 +5988,22 @@ static int remove_space(char *line, int len) return dst - line; } +void flush_one_hunk(struct object_id *result, git_SHA_CTX *ctx) +{ + unsigned char hash[GIT_MAX_RAWSZ]; + unsigned short carry = 0; + int i; + + git_SHA1_Final(hash, ctx); + git_SHA1_Init(ctx); + /* 20-byte sum, with carry */ + for (i = 0; i < GIT_SHA1_RAWSZ; ++i) { + carry += result->hash[i] + hash[i]; + result->hash[i] = carry; + carry >>= 8; + } +} + static void patch_id_consume(void *priv, char *line, unsigned long len) { struct patch_id_t *data = priv; @@ -6012,8 +6028,8 @@ static void patch_id_add_mode(git_SHA_CTX *ctx, unsigned mode) git_SHA1_Update(ctx, buf, len); } -/* returns 0 upon success, and writes result into sha1 */ -static int diff_get_patch_id(struct diff_options *options, struct object_id *oid, int diff_header_only) +/* returns 0 upon success, and writes result into oid */ +static int diff_get_patch_id(struct diff_options *options, struct object_id *oid, int diff_header_only, int stable) { struct diff_queue_struct *q = &diff_queued_diff; int i; @@ -6023,6 +6039,7 @@ static int diff_get_patch_id(struct diff_options *options, struct object_id *oid git_SHA1_Init(&ctx); memset(&data, 0, sizeof(struct patch_id_t)); data.ctx = &ctx; + oidclr(oid); for (i = 0; i < q->nr; i++) { xpparam_t xpp; @@ -6098,17 +6115,22 @@ static int diff_get_patch_id(struct diff_options *options, struct object_id *oid patch_id_consume, &data, &xpp, &xecfg)) return error("unable to generate patch-id diff for %s", p->one->path); + + if (stable) + flush_one_hunk(oid, &ctx); } - git_SHA1_Final(oid->hash, &ctx); + if (!stable) + git_SHA1_Final(oid->hash, &ctx); + return 0; } -int diff_flush_patch_id(struct diff_options *options, struct object_id *oid, int diff_header_only) +int diff_flush_patch_id(struct diff_options *options, struct object_id *oid, int diff_header_only, int stable) { struct diff_queue_struct *q = &diff_queued_diff; int i; - int result = diff_get_patch_id(options, oid, diff_header_only); + int result = diff_get_patch_id(options, oid, diff_header_only, stable); for (i = 0; i < q->nr; i++) diff_free_filepair(q->queue[i]); |