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Merge branch 'jc/maint-blame-unique-abbrev'

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"git blame" did not try to make sure the abbreviated commit object
names in its output are unique.

* jc/maint-blame-unique-abbrev:
  blame: compute abbreviation width that ensures uniqueness
This commit is contained in:
Junio C Hamano 2012-07-09 09:01:37 -07:00
commit 3a335ee2da
1 changed files with 21 additions and 4 deletions
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25
builtin/blame.c
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@ -1837,6 +1837,16 @@ static int read_ancestry(const char *graft_file)
return 0;
}
static int update_auto_abbrev(int auto_abbrev, struct origin *suspect)
{
const char *uniq = find_unique_abbrev(suspect->commit->object.sha1,
auto_abbrev);
int len = strlen(uniq);
if (auto_abbrev < len)
return len;
return auto_abbrev;
}
/*
* How many columns do we need to show line numbers, authors,
* and filenames?
@ -1847,12 +1857,16 @@ static void find_alignment(struct scoreboard *sb, int *option)
int longest_dst_lines = 0;
unsigned largest_score = 0;
struct blame_entry *e;
int compute_auto_abbrev = (abbrev < 0);
int auto_abbrev = default_abbrev;
for (e = sb->ent; e; e = e->next) {
struct origin *suspect = e->suspect;
struct commit_info ci;
int num;
if (compute_auto_abbrev)
auto_abbrev = update_auto_abbrev(auto_abbrev, suspect);
if (strcmp(suspect->path, sb->path))
*option |= OUTPUT_SHOW_NAME;
num = strlen(suspect->path);
@ -1880,6 +1894,10 @@ static void find_alignment(struct scoreboard *sb, int *option)
max_orig_digits = decimal_width(longest_src_lines);
max_digits = decimal_width(longest_dst_lines);
max_score_digits = decimal_width(largest_score);
if (compute_auto_abbrev)
/* one more abbrev length is needed for the boundary commit */
abbrev = auto_abbrev + 1;
}
/*
@ -2353,10 +2371,9 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
parse_done:
argc = parse_options_end(&ctx);
if (abbrev == -1)
abbrev = default_abbrev;
/* one more abbrev length is needed for the boundary commit */
abbrev++;
if (0 < abbrev)
/* one more abbrev length is needed for the boundary commit */
abbrev++;
if (revs_file && read_ancestry(revs_file))
die_errno("reading graft file '%s' failed", revs_file);