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apply -v: show offset count when patch did not apply exactly

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When the line number the patch intended to touch does not match
the line in the version being patched, GNU patch reports that
it applied the hunk at a different line number, with how big an
offset.

Teach "git apply" to do the same under --verbose option.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano 2011-03-04 14:43:45 -08:00
parent 964498e7f9
commit 334f8cb22a
1 changed files with 14 additions and 2 deletions
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16
builtin/apply.c
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@ -2432,7 +2432,8 @@ static void update_image(struct image *img,
}
static int apply_one_fragment(struct image *img, struct fragment *frag,
int inaccurate_eof, unsigned ws_rule)
int inaccurate_eof, unsigned ws_rule,
int nth_fragment)
{
int match_beginning, match_end;
const char *patch = frag->patch;
@ -2638,6 +2639,15 @@ static int apply_one_fragment(struct image *img, struct fragment *frag,
apply = 0;
}
if (apply_verbosely && applied_pos != pos) {
int offset = applied_pos - pos;
if (apply_in_reverse)
offset = 0 - offset;
fprintf(stderr,
"Hunk #%d succeeded at %d (offset %d lines).\n",
nth_fragment, applied_pos + 1, offset);
}
/*
* Warn if it was necessary to reduce the number
* of context lines.
@ -2785,12 +2795,14 @@ static int apply_fragments(struct image *img, struct patch *patch)
const char *name = patch->old_name ? patch->old_name : patch->new_name;
unsigned ws_rule = patch->ws_rule;
unsigned inaccurate_eof = patch->inaccurate_eof;
int nth = 0;
if (patch->is_binary)
return apply_binary(img, patch);
while (frag) {
if (apply_one_fragment(img, frag, inaccurate_eof, ws_rule)) {
nth++;
if (apply_one_fragment(img, frag, inaccurate_eof, ws_rule, nth)) {
error("patch failed: %s:%ld", name, frag->oldpos);
if (!apply_with_reject)
return -1;