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
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
|
/*
* Utilities library for libgit2 examples
*
* Written by the libgit2 contributors
*
* To the extent possible under law, the author(s) have dedicated all copyright
* and related and neighboring rights to this software to the public domain
* worldwide. This software is distributed without any warranty.
*
* You should have received a copy of the CC0 Public Domain Dedication along
* with this software. If not, see
* <http://creativecommons.org/publicdomain/zero/1.0/>.
*/
#include "common.h"
#ifndef _WIN32
# include <unistd.h>
#endif
#include <errno.h>
void check_lg2(int error, const char *message, const char *extra)
{
const git_error *lg2err;
const char *lg2msg = "", *lg2spacer = "";
if (!error)
return;
if ((lg2err = git_error_last()) != NULL && lg2err->message != NULL) {
lg2msg = lg2err->message;
lg2spacer = " - ";
}
if (extra)
fprintf(stderr, "%s '%s' [%d]%s%s\n",
message, extra, error, lg2spacer, lg2msg);
else
fprintf(stderr, "%s [%d]%s%s\n",
message, error, lg2spacer, lg2msg);
exit(1);
}
void fatal(const char *message, const char *extra)
{
if (extra)
fprintf(stderr, "%s %s\n", message, extra);
else
fprintf(stderr, "%s\n", message);
exit(1);
}
int diff_output(
const git_diff_delta *d,
const git_diff_hunk *h,
const git_diff_line *l,
void *p)
{
FILE *fp = (FILE*)p;
(void)d; (void)h;
if (!fp)
fp = stdout;
if (l->origin == GIT_DIFF_LINE_CONTEXT ||
l->origin == GIT_DIFF_LINE_ADDITION ||
l->origin == GIT_DIFF_LINE_DELETION)
fputc(l->origin, fp);
fwrite(l->content, 1, l->content_len, fp);
return 0;
}
void treeish_to_tree(
git_tree **out, git_repository *repo, const char *treeish)
{
git_object *obj = NULL;
check_lg2(
git_revparse_single(&obj, repo, treeish),
"looking up object", treeish);
check_lg2(
git_object_peel((git_object **)out, obj, GIT_OBJECT_TREE),
"resolving object to tree", treeish);
git_object_free(obj);
}
void *xrealloc(void *oldp, size_t newsz)
{
void *p = realloc(oldp, newsz);
if (p == NULL) {
fprintf(stderr, "Cannot allocate memory, exiting.\n");
exit(1);
}
return p;
}
int resolve_refish(git_annotated_commit **commit, git_repository *repo, const char *refish)
{
git_reference *ref;
git_object *obj;
int err = 0;
assert(commit != NULL);
err = git_reference_dwim(&ref, repo, refish);
if (err == GIT_OK) {
git_annotated_commit_from_ref(commit, repo, ref);
git_reference_free(ref);
return 0;
}
err = git_revparse_single(&obj, repo, refish);
if (err == GIT_OK) {
err = git_annotated_commit_lookup(commit, repo, git_object_id(obj));
git_object_free(obj);
}
return err;
}
static int readline(char **out)
{
int c, error = 0, length = 0, allocated = 0;
char *line = NULL;
errno = 0;
while ((c = getchar()) != EOF) {
if (length == allocated) {
allocated += 16;
if ((line = realloc(line, allocated)) == NULL) {
error = -1;
goto error;
}
}
if (c == '\n')
break;
line[length++] = c;
}
if (errno != 0) {
error = -1;
goto error;
}
line[length] = '\0';
*out = line;
line = NULL;
error = length;
error:
free(line);
return error;
}
static int ask(char **out, const char *prompt, char optional)
{
printf("%s ", prompt);
fflush(stdout);
if (!readline(out) && !optional) {
fprintf(stderr, "Could not read response: %s", strerror(errno));
return -1;
}
return 0;
}
int cred_acquire_cb(git_credential **out,
const char *url,
const char *username_from_url,
unsigned int allowed_types,
void *payload)
{
char *username = NULL, *password = NULL, *privkey = NULL, *pubkey = NULL;
int error = 1;
UNUSED(url);
UNUSED(payload);
if (username_from_url) {
if ((username = strdup(username_from_url)) == NULL)
goto out;
} else if ((error = ask(&username, "Username:", 0)) < 0) {
goto out;
}
if (allowed_types & GIT_CREDENTIAL_SSH_KEY) {
int n;
if ((error = ask(&privkey, "SSH Key:", 0)) < 0 ||
(error = ask(&password, "Password:", 1)) < 0)
goto out;
if ((n = snprintf(NULL, 0, "%s.pub", privkey)) < 0 ||
(pubkey = malloc(n + 1)) == NULL ||
(n = snprintf(pubkey, n + 1, "%s.pub", privkey)) < 0)
goto out;
error = git_credential_ssh_key_new(out, username, pubkey, privkey, password);
} else if (allowed_types & GIT_CREDENTIAL_USERPASS_PLAINTEXT) {
if ((error = ask(&password, "Password:", 1)) < 0)
goto out;
error = git_credential_userpass_plaintext_new(out, username, password);
} else if (allowed_types & GIT_CREDENTIAL_USERNAME) {
error = git_credential_username_new(out, username);
}
out:
free(username);
free(password);
free(privkey);
free(pubkey);
return error;
}
char *read_file(const char *path)
{
ssize_t total = 0;
char *buf = NULL;
struct stat st;
int fd = -1;
if ((fd = open(path, O_RDONLY)) < 0 || fstat(fd, &st) < 0)
goto out;
if ((buf = malloc(st.st_size + 1)) == NULL)
goto out;
while (total < st.st_size) {
ssize_t bytes = read(fd, buf + total, st.st_size - total);
if (bytes <= 0) {
if (errno == EAGAIN || errno == EINTR)
continue;
free(buf);
buf = NULL;
goto out;
}
total += bytes;
}
buf[total] = '\0';
out:
if (fd >= 0)
close(fd);
return buf;
}
|
