{{ message }}
Repository navigation
Expand file tree
/
Copy pathclone.c
More file actions
441 lines (354 loc) · 10.6 KB
/
Copy pathclone.c
File metadata and controls
441 lines (354 loc) · 10.6 KB
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
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#include <assert.h>
#include "git2/clone.h"
#include "git2/remote.h"
#include "git2/revparse.h"
#include "git2/branch.h"
#include "git2/config.h"
#include "git2/checkout.h"
#include "git2/commit.h"
#include "git2/tree.h"
#include "common.h"
#include "remote.h"
#include "fileops.h"
#include "refs.h"
#include "path.h"
#include "repository.h"
static int create_branch(
git_reference **branch,
git_repository *repo,
const git_oid *target,
const char *name,
const git_signature *signature,
const char *log_message)
{
git_commit *head_obj = NULL;
git_reference *branch_ref = NULL;
int error;
/* Find the target commit */
if ((error = git_commit_lookup(&head_obj, repo, target)) < 0)
return error;
/* Create the new branch */
error = git_branch_create(&branch_ref, repo, name, head_obj, 0, signature, log_message);
git_commit_free(head_obj);
if (!error)
*branch = branch_ref;
else
git_reference_free(branch_ref);
return error;
}
static int setup_tracking_config(
git_repository *repo,
const char *branch_name,
const char *remote_name,
const char *merge_target)
{
git_config *cfg;
git_buf remote_key = GIT_BUF_INIT, merge_key = GIT_BUF_INIT;
int error = -1;
if (git_repository_config__weakptr(&cfg, repo) < 0)
return -1;
if (git_buf_printf(&remote_key, "branch.%s.remote", branch_name) < 0)
goto cleanup;
if (git_buf_printf(&merge_key, "branch.%s.merge", branch_name) < 0)
goto cleanup;
if (git_config_set_string(cfg, git_buf_cstr(&remote_key), remote_name) < 0)
goto cleanup;
if (git_config_set_string(cfg, git_buf_cstr(&merge_key), merge_target) < 0)
goto cleanup;
error = 0;
cleanup:
git_buf_free(&remote_key);
git_buf_free(&merge_key);
return error;
}
static int create_tracking_branch(
git_reference **branch,
git_repository *repo,
const git_oid *target,
const char *branch_name,
const git_signature *signature,
const char *log_message)
{
int error;
if ((error = create_branch(branch, repo, target, branch_name, signature, log_message)) < 0)
return error;
return setup_tracking_config(
repo,
branch_name,
GIT_REMOTE_ORIGIN,
git_reference_name(*branch));
}
struct head_info {
git_repository *repo;
git_oid remote_head_oid;
git_buf branchname;
const git_refspec *refspec;
bool found;
};
static int reference_matches_remote_head(
const char *reference_name,
void *payload)
{
struct head_info *head_info = (struct head_info *)payload;
git_oid oid;
int error;
/* TODO: Should we guard against references
* which name doesn't start with refs/heads/ ?
*/
error = git_reference_name_to_id(&oid, head_info->repo, reference_name);
if (error == GIT_ENOTFOUND) {
/* If the reference doesn't exists, it obviously cannot match the
* expected oid. */
giterr_clear();
return 0;
}
if (!error && !git_oid__cmp(&head_info->remote_head_oid, &oid)) {
/* Determine the local reference name from the remote tracking one */
error = git_refspec_rtransform(
&head_info->branchname, head_info->refspec, reference_name);
if (!error &&
git_buf_len(&head_info->branchname) > 0 &&
!(error = git_buf_sets(
&head_info->branchname,
git_buf_cstr(&head_info->branchname) +
strlen(GIT_REFS_HEADS_DIR))))
{
head_info->found = true;
error = GIT_ITEROVER;
}
}
return error;
}
static int update_head_to_new_branch(
git_repository *repo,
const git_oid *target,
const char *name,
const git_signature *signature,
const char *reflog_message)
{
git_reference *tracking_branch = NULL;
int error = create_tracking_branch(&tracking_branch, repo, target, name,
signature, reflog_message);
if (!error)
error = git_repository_set_head(
repo, git_reference_name(tracking_branch),
signature, reflog_message);
git_reference_free(tracking_branch);
return error;
}
static int update_head_to_remote(
git_repository *repo,
git_remote *remote,
const git_signature *signature,
const char *reflog_message)
{
int error = 0;
size_t refs_len;
git_refspec dummy_spec;
const git_remote_head *remote_head, **refs;
struct head_info head_info;
git_buf remote_master_name = GIT_BUF_INIT;
if ((error = git_remote_ls(&refs, &refs_len, remote)) < 0)
return error;
/* Did we just clone an empty repository? */
if (refs_len == 0)
return setup_tracking_config(
repo, "master", GIT_REMOTE_ORIGIN, GIT_REFS_HEADS_MASTER_FILE);
/* Get the remote's HEAD. This is always the first ref in the list. */
remote_head = refs[0];
assert(remote_head);
memset(&head_info, 0, sizeof(head_info));
git_oid_cpy(&head_info.remote_head_oid, &remote_head->oid);
head_info.repo = repo;
head_info.refspec =
git_remote__matching_refspec(remote, GIT_REFS_HEADS_MASTER_FILE);
if (head_info.refspec == NULL) {
memset(&dummy_spec, 0, sizeof(git_refspec));
head_info.refspec = &dummy_spec;
}
/* Determine the remote tracking reference name from the local master */
if ((error = git_refspec_transform(
&remote_master_name,
head_info.refspec,
GIT_REFS_HEADS_MASTER_FILE)) < 0)
return error;
/* Check to see if the remote HEAD points to the remote master */
error = reference_matches_remote_head(
git_buf_cstr(&remote_master_name), &head_info);
if (error < 0 && error != GIT_ITEROVER)
goto cleanup;
if (head_info.found) {
error = update_head_to_new_branch(
repo,
&head_info.remote_head_oid,
git_buf_cstr(&head_info.branchname),
signature, reflog_message);
goto cleanup;
}
/* Not master. Check all the other refs. */
error = git_reference_foreach_name(
repo, reference_matches_remote_head, &head_info);
if (error < 0 && error != GIT_ITEROVER)
goto cleanup;
if (head_info.found) {
error = update_head_to_new_branch(
repo,
&head_info.remote_head_oid,
git_buf_cstr(&head_info.branchname),
signature, reflog_message);
} else {
error = git_repository_set_head_detached(
repo, &head_info.remote_head_oid, signature, reflog_message);
}
cleanup:
git_buf_free(&remote_master_name);
git_buf_free(&head_info.branchname);
return error;
}
static int update_head_to_branch(
git_repository *repo,
const char *remote_name,
const char *branch,
const git_signature *signature,
const char *reflog_message)
{
int retcode;
git_buf remote_branch_name = GIT_BUF_INIT;
git_reference* remote_ref = NULL;
assert(remote_name && branch);
if ((retcode = git_buf_printf(&remote_branch_name, GIT_REFS_REMOTES_DIR "%s/%s",
remote_name, branch)) < 0 )
goto cleanup;
if ((retcode = git_reference_lookup(&remote_ref, repo, git_buf_cstr(&remote_branch_name))) < 0)
goto cleanup;
retcode = update_head_to_new_branch(repo, git_reference_target(remote_ref), branch,
signature, reflog_message);
cleanup:
git_reference_free(remote_ref);
git_buf_free(&remote_branch_name);
return retcode;
}
/*
* submodules?
*/
static int create_and_configure_origin(
git_remote **out,
git_repository *repo,
const char *url,
const git_clone_options *options)
{
int error;
git_remote *origin = NULL;
const char *name;
name = options->remote_name ? options->remote_name : "origin";
if ((error = git_remote_create(&origin, repo, name, url)) < 0)
goto on_error;
if (options->ignore_cert_errors)
git_remote_check_cert(origin, 0);
if ((error = git_remote_set_callbacks(origin, &options->remote_callbacks)) < 0)
goto on_error;
if ((error = git_remote_save(origin)) < 0)
goto on_error;
*out = origin;
return 0;
on_error:
git_remote_free(origin);
return error;
}
static bool should_checkout(
git_repository *repo,
bool is_bare,
const git_checkout_opts *opts)
{
if (is_bare)
return false;
if (!opts)
return false;
if (opts->checkout_strategy == GIT_CHECKOUT_NONE)
return false;
return !git_repository_head_unborn(repo);
}
int git_clone_into(git_repository *repo, git_remote *remote, const git_checkout_opts *co_opts, const char *branch, const git_signature *signature)
{
int error = 0, old_fetchhead;
git_strarray refspecs;
git_buf reflog_message = GIT_BUF_INIT;
assert(repo && remote);
if (!git_repository_is_empty(repo)) {
giterr_set(GITERR_INVALID, "the repository is not empty");
return -1;
}
if ((error = git_remote_get_fetch_refspecs(&refspecs, remote)) < 0)
return error;
if ((error = git_remote_add_fetch(remote, "refs/tags/*:refs/tags/*")) < 0)
return error;
old_fetchhead = git_remote_update_fetchhead(remote);
git_remote_set_update_fetchhead(remote, 0);
git_buf_printf(&reflog_message, "clone: from %s", git_remote_url(remote));
if ((error = git_remote_fetch(remote, signature, git_buf_cstr(&reflog_message))) != 0)
goto cleanup;
if (branch)
error = update_head_to_branch(repo, git_remote_name(remote), branch,
signature, git_buf_cstr(&reflog_message));
/* Point HEAD to the same ref as the remote's head */
else
error = update_head_to_remote(repo, remote, signature, git_buf_cstr(&reflog_message));
if (!error && should_checkout(repo, git_repository_is_bare(repo), co_opts))
error = git_checkout_head(repo, co_opts);
cleanup:
git_remote_set_update_fetchhead(remote, old_fetchhead);
/* Go back to the original refspecs */
{
int error_alt = git_remote_set_fetch_refspecs(remote, &refspecs);
if (!error)
error = error_alt;
}
git_strarray_free(&refspecs);
git_buf_free(&reflog_message);
return error;
}
int git_clone(
git_repository **out,
const char *url,
const char *local_path,
const git_clone_options *_options)
{
int error = 0;
git_repository *repo = NULL;
git_remote *origin;
git_clone_options options = GIT_CLONE_OPTIONS_INIT;
uint32_t rmdir_flags = GIT_RMDIR_REMOVE_FILES;
assert(out && url && local_path);
if (_options)
memcpy(&options, _options, sizeof(git_clone_options));
GITERR_CHECK_VERSION(&options, GIT_CLONE_OPTIONS_VERSION, "git_clone_options");
/* Only clone to a new directory or an empty directory */
if (git_path_exists(local_path) && !git_path_is_empty_dir(local_path)) {
giterr_set(GITERR_INVALID,
"'%s' exists and is not an empty directory", local_path);
return GIT_EEXISTS;
}
/* Only remove the root directory on failure if we create it */
if (git_path_exists(local_path))
rmdir_flags |= GIT_RMDIR_SKIP_ROOT;
if ((error = git_repository_init(&repo, local_path, options.bare)) < 0)
return error;
if (!(error = create_and_configure_origin(&origin, repo, url, &options))) {
error = git_clone_into(
repo, origin, &options.checkout_opts, options.checkout_branch, options.signature);
git_remote_free(origin);
}
if (error != 0) {
git_repository_free(repo);
repo = NULL;
(void)git_futils_rmdir_r(local_path, NULL, rmdir_flags);
}
*out = repo;
return error;
}
You can’t perform that action at this time.