1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/*
* Copyright (C) 2005 Junio C Hamano
*/
#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_tree_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_tree_helper_usage =
"diff-tree-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_tree_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_tree_output(sb.buf, av+1, ac-1, reverse);
if (status)
fprintf(stderr, "cannot parse %s\n", sb.buf);
}
return 0;
}
|
