mirror of
https://github.com/git/git.git
synced 2024-11-18 04:04:11 +01:00
902b92e00e
It used to be that diff-tree needed helper support to parse its raw output to generate diffs, but these days git-diff-* family produces the same output and the helper is not tied to diff-tree anymore. Drop "tree" from its name. This follows the "rename only" commit to adjust the contents of the files involved. Signed-off-by: Junio C Hamano <junkio@cox.net> Signed-off-by: Petr Baudis <pasky@ucw.cz>
144 lines
2.9 KiB
C
144 lines
2.9 KiB
C
/*
|
|
* Copyright (C) 2005 Junio C Hamano
|
|
*/
|
|
#include <limits.h>
|
|
#include "cache.h"
|
|
#include "strbuf.h"
|
|
#include "diff.h"
|
|
|
|
static int matches_pathspec(const char *name, const char **spec, int cnt)
|
|
{
|
|
int i;
|
|
int namelen = strlen(name);
|
|
for (i = 0; i < cnt; i++) {
|
|
int speclen = strlen(spec[i]);
|
|
if (! strncmp(spec[i], name, speclen) &&
|
|
speclen <= namelen &&
|
|
(name[speclen] == 0 ||
|
|
name[speclen] == '/'))
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int parse_oneside_change(const char *cp, struct diff_spec *one,
|
|
char *path)
|
|
{
|
|
int ch;
|
|
|
|
one->file_valid = one->sha1_valid = 1;
|
|
one->mode = 0;
|
|
while ((ch = *cp) && '0' <= ch && ch <= '7') {
|
|
one->mode = (one->mode << 3) | (ch - '0');
|
|
cp++;
|
|
}
|
|
|
|
if (strncmp(cp, "\tblob\t", 6))
|
|
return -1;
|
|
cp += 6;
|
|
if (get_sha1_hex(cp, one->blob_sha1))
|
|
return -1;
|
|
cp += 40;
|
|
if (*cp++ != '\t')
|
|
return -1;
|
|
strcpy(path, cp);
|
|
return 0;
|
|
}
|
|
|
|
static int parse_diff_raw_output(const char *buf,
|
|
const char **spec, int cnt, int reverse)
|
|
{
|
|
struct diff_spec old, new;
|
|
char path[PATH_MAX];
|
|
const char *cp = buf;
|
|
int ch;
|
|
|
|
switch (*cp++) {
|
|
case 'U':
|
|
if (!cnt || matches_pathspec(cp + 1, spec, cnt))
|
|
diff_unmerge(cp + 1);
|
|
return 0;
|
|
case '+':
|
|
old.file_valid = 0;
|
|
parse_oneside_change(cp, &new, path);
|
|
break;
|
|
case '-':
|
|
new.file_valid = 0;
|
|
parse_oneside_change(cp, &old, path);
|
|
break;
|
|
case '*':
|
|
old.file_valid = old.sha1_valid =
|
|
new.file_valid = new.sha1_valid = 1;
|
|
old.mode = new.mode = 0;
|
|
while ((ch = *cp) && ('0' <= ch && ch <= '7')) {
|
|
old.mode = (old.mode << 3) | (ch - '0');
|
|
cp++;
|
|
}
|
|
if (strncmp(cp, "->", 2))
|
|
return -1;
|
|
cp += 2;
|
|
while ((ch = *cp) && ('0' <= ch && ch <= '7')) {
|
|
new.mode = (new.mode << 3) | (ch - '0');
|
|
cp++;
|
|
}
|
|
if (strncmp(cp, "\tblob\t", 6))
|
|
return -1;
|
|
cp += 6;
|
|
if (get_sha1_hex(cp, old.blob_sha1))
|
|
return -1;
|
|
cp += 40;
|
|
if (strncmp(cp, "->", 2))
|
|
return -1;
|
|
cp += 2;
|
|
if (get_sha1_hex(cp, new.blob_sha1))
|
|
return -1;
|
|
cp += 40;
|
|
if (*cp++ != '\t')
|
|
return -1;
|
|
strcpy(path, cp);
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
if (!cnt || matches_pathspec(path, spec, cnt)) {
|
|
if (reverse)
|
|
run_external_diff(path, &new, &old);
|
|
else
|
|
run_external_diff(path, &old, &new);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static const char *diff_helper_usage =
|
|
"git-diff-helper [-R] [-z] paths...";
|
|
|
|
int main(int ac, const char **av) {
|
|
struct strbuf sb;
|
|
int reverse = 0;
|
|
int line_termination = '\n';
|
|
|
|
strbuf_init(&sb);
|
|
|
|
while (1 < ac && av[1][0] == '-') {
|
|
if (av[1][1] == 'R')
|
|
reverse = 1;
|
|
else if (av[1][1] == 'z')
|
|
line_termination = 0;
|
|
else
|
|
usage(diff_helper_usage);
|
|
ac--; av++;
|
|
}
|
|
/* the remaining parameters are paths patterns */
|
|
|
|
while (1) {
|
|
int status;
|
|
read_line(&sb, stdin, line_termination);
|
|
if (sb.eof)
|
|
break;
|
|
status = parse_diff_raw_output(sb.buf, av+1, ac-1, reverse);
|
|
if (status)
|
|
fprintf(stderr, "cannot parse %s\n", sb.buf);
|
|
}
|
|
return 0;
|
|
}
|