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
|
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <git2.h>
enum match_result
{
MATCH_RESULT_INITIAL,
MATCH_RESULT_NOTFOUND,
MATCH_RESULT_FOUND,
};
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;
}
int
try_git(const int err, const char* optional_prefix)
{
if (0 > err) {
const git_error* e = git_error_last();
if (NULL != optional_prefix)
dprintf(2, "%s: ", optional_prefix);
dprintf(2, "%s\n", e->message);
exit(1);
}
return err;
}
int
line_line(const git_diff_delta* delta, const git_diff_hunk* hunk, const git_diff_line* line, void* payload)
{
const char* const pkgver = "pkgver";
const size_t len = strlen(pkgver);
enum match_result* matched = (enum match_result*) payload;
switch (line->origin) {
case GIT_DIFF_LINE_ADDITION:
case GIT_DIFF_LINE_DELETION:
if (len <= line->content_len && 0 == strncmp(line->content, pkgver, len))
*matched = MATCH_RESULT_FOUND;
break;
default:
if (MATCH_RESULT_FOUND != *matched)
*matched = MATCH_RESULT_NOTFOUND;
break;
}
return 0;
}
int
main(int argc, char* argv[])
{
git_libgit2_init();
git_repository* repo = NULL;
try_git(git_repository_open_ext(&repo, NULL, GIT_REPOSITORY_OPEN_FROM_ENV, NULL), "opening repo");
git_diff_options diffopts = GIT_DIFF_OPTIONS_INIT;
diffopts.pathspec.strings = (char*[1]){relative_path_in_current_dir(repo, "PKGBUILD")};
diffopts.pathspec.count = 1;
if (NULL == diffopts.pathspec.strings[0]) {
dprintf(2, "finding PKGBUILD in repo\n");
exit(1);
}
git_pathspec* pathspec = NULL;
try_git(git_pathspec_new(&pathspec, &diffopts.pathspec), "creating pathspec");
git_revwalk* walker = NULL;
try_git(git_revwalk_new(&walker, repo), "creating revwalker");
try_git(git_revwalk_push_head(walker), "finding head");
git_oid oid;
git_tree* earlier = NULL;
git_tree* later = NULL;
int rel = 1;
int occurred = 0;
while (0 == git_revwalk_next(&oid, walker)) {
git_commit* commit;
try_git(git_commit_lookup(&commit, repo, &oid), "finding commit");
if (NULL != earlier)
git_tree_free(earlier);
earlier = later;
try_git(git_commit_tree(&later, commit), "finding tree");
git_diff* diff;
if (NULL == earlier)
try_git(git_diff_tree_to_workdir_with_index(&diff, repo, later, &diffopts), "diff");
else
try_git(git_diff_tree_to_tree(&diff, repo, later, earlier, &diffopts), "diff");
enum match_result matched = MATCH_RESULT_INITIAL;
try_git(git_diff_foreach(diff, NULL, NULL, NULL, &line_line, &matched), "searching lines");
git_diff_free(diff);
git_commit_free(commit);
if (MATCH_RESULT_INITIAL != matched)
occurred = 1;
if (MATCH_RESULT_FOUND == matched)
break;
if (MATCH_RESULT_NOTFOUND == matched)
rel++;
}
if (0 == occurred)
dprintf(2, "PKGBUILD not found\n");
else
printf("%d\n", rel);
}
|
