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
143
144
145
146
147
148
149
150
151
152
153
|
#define PCRE2_CODE_UNIT_WIDTH 8
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <git2.h>
#include <pcre2.h>
size_t
min(const size_t lhs, const size_t rhs)
{
return lhs > rhs ? rhs : lhs;
}
char*
relative_path_in_current_dir(git_repository* repo, const char* filename)
{
const long maximum = pathconf(".", _PC_PATH_MAX);
size_t len = 0 > maximum ? 1024 : maximum;
char* buf = NULL;
char* cwd = NULL;
for (; NULL == cwd && 1024 * 50 > len; len *= 2) {
if (NULL == (cwd = realloc(buf, len))) {
if (NULL != buf)
free(buf);
return NULL;
}
buf = cwd;
cwd = getcwd(buf, len);
if (NULL == cwd && ERANGE != errno) {
free(buf);
return NULL;
}
}
const char* workdir = git_repository_workdir(repo);
const size_t prefix = min(strlen(cwd), strlen(workdir));
if (0 != strncmp(cwd, workdir, prefix)) {
free(cwd);
return NULL;
}
const size_t relative = strlen(cwd + prefix);
if (NULL == (buf = malloc(relative + strlen(filename) + 2))) {
free(cwd);
return NULL;
}
strcpy(buf, cwd + prefix);
if (0 < relative)
strcat(buf, "/");
strcat(buf, filename);
free(cwd);
return buf;
}
void
gerror(void)
{
const git_error* err = git_error_last();
dprintf(2, "%s\n", err->message);
}
int
line_line(const git_diff_delta* delta, const git_diff_hunk* hunk, const git_diff_line* line, void* payload)
{
switch (line->origin) {
case GIT_DIFF_LINE_ADDITION:
printf("+%.*s", line->content_len, line->content);
break;
case GIT_DIFF_LINE_DELETION:
printf("-%.*s", line->content_len, line->content);
break;
default:
}
return 0;
}
int
main(int argc, char* argv[])
{
git_libgit2_init();
git_repository* repo = NULL;
int err = git_repository_open_ext(&repo, NULL, GIT_REPOSITORY_OPEN_FROM_ENV, NULL);
if (0 > err) {
gerror();
return 1;
}
git_diff_options diffopts = GIT_DIFF_OPTIONS_INIT;
diffopts.pathspec.strings = (char*[]){relative_path_in_current_dir(repo, "PKGBUILD")};
diffopts.pathspec.count = 1;
git_pathspec* pathspec = NULL;
err = git_pathspec_new(&pathspec, &diffopts.pathspec);
if (0 > err) {
gerror();
return 1;
}
git_revwalk* walker = NULL;
err = git_revwalk_new(&walker, repo);
if (0 > err) {
gerror();
return 1;
}
err = git_revwalk_push_head(walker);
if (0 > err) {
gerror();
return 1;
}
git_oid oid;
git_tree* earlier = NULL;
git_tree* later = NULL;
while (0 == git_revwalk_next(&oid, walker)) {
git_commit* commit;
err = git_commit_lookup(&commit, repo, &oid);
if (0 > err) {
gerror();
return 1;
}
if (NULL != earlier)
git_tree_free(earlier);
earlier = later;
err = git_commit_tree(&later, commit);
if (0 > err) {
gerror();
return 1;
}
git_diff* diff;
if (NULL == earlier)
err = git_diff_tree_to_workdir_with_index(&diff, repo, later, &diffopts);
else
err = git_diff_tree_to_tree(&diff, repo, later, earlier, &diffopts);
if (0 > err) {
gerror();
return 1;
}
git_diff_foreach(diff, NULL, NULL, NULL, &line_line, NULL);
git_diff_free(diff);
git_commit_free(commit);
}
if (NULL != earlier)
git_tree_free(earlier);
if (NULL != later)
git_tree_free(later);
git_revwalk_free(walker);
git_pathspec_free(pathspec);
free(diffopts.pathspec.strings[0]);
git_repository_free(repo);
}
|
