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git-blame: --show-number (and -n)

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The new option makes the command's native output format show the
original line number in the blamed revision.

Note: the current implementation of find_orig_linenum involves
linear search through the line_map array every time.  It should
probably build a reverse map upfront and do a simple look-up to
speed things up, but I'll leave it to more clever and beautiful
people ;-).

Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Junio C Hamano 2006-10-05 14:06:26 -07:00
parent eb93b72406
commit cf54a029ff
1 changed files with 38 additions and 4 deletions
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42
blame.c
View file

@ -731,6 +731,25 @@ static int read_ancestry(const char *graft_file,
return 0;
}
static int lineno_width(int lines)
{
int i, width;
for (width = 1, i = 10; i <= lines + 1; width++)
i *= 10;
return width;
}
static int find_orig_linenum(struct util_info *u, int lineno)
{
int i;
for (i = 0; i < u->num_lines; i++)
if (lineno == u->line_map[i])
return i + 1;
return 0;
}
int main(int argc, const char **argv)
{
int i;
@ -750,9 +769,10 @@ int main(int argc, const char **argv)
struct commit_info ci;
const char *buf;
int max_digits;
int longest_file, longest_author;
int max_digits, max_orig_digits;
int longest_file, longest_author, longest_file_lines;
int show_name = 0;
int show_number = 0;
const char *prefix = setup_git_directory();
git_config(git_default_config);
@ -791,6 +811,11 @@ int main(int argc, const char **argv)
show_name = 1;
continue;
}
if (!strcmp(argv[i], "-n") ||
!strcmp(argv[i], "--show-number")) {
show_number = 1;
continue;
}
if (!strcmp(argv[i], "--")) {
options = 0;
continue;
@ -853,11 +878,11 @@ int main(int argc, const char **argv)
process_commits(&rev, filename, &initial);
buf = blame_contents;
for (max_digits = 1, i = 10; i <= num_blame_lines + 1; max_digits++)
i *= 10;
max_digits = lineno_width(num_blame_lines);
longest_file = 0;
longest_author = 0;
longest_file_lines = 0;
for (i = 0; i < num_blame_lines; i++) {
struct commit *c = blame_lines[i];
struct util_info *u;
@ -869,17 +894,23 @@ int main(int argc, const char **argv)
show_name = 1;
if (longest_file < strlen(u->pathname))
longest_file = strlen(u->pathname);
if (longest_file_lines < u->num_lines)
longest_file_lines = u->num_lines;
get_commit_info(c, &ci);
if (longest_author < strlen(ci.author))
longest_author = strlen(ci.author);
}
max_orig_digits = lineno_width(longest_file_lines);
for (i = 0; i < num_blame_lines; i++) {
struct commit *c = blame_lines[i];
struct util_info *u;
int lineno;
if (!c)
c = initial;
u = c->util;
lineno = find_orig_linenum(u, i);
get_commit_info(c, &ci);
fwrite(sha1_to_hex(c->object.sha1), sha1_len, 1, stdout);
@ -893,6 +924,9 @@ int main(int argc, const char **argv)
if (show_name)
printf(" %-*.*s", longest_file, longest_file,
u->pathname);
if (show_number)
printf(" %*d", max_orig_digits,
lineno);
printf(" (%-*.*s %10s %*d) ",
longest_author, longest_author, ci.author,
format_time(ci.author_time, ci.author_tz,