summaryrefslogtreecommitdiff
path: root/builtin-push.c
blob: 2b98ba32310810462151b233053b99b0b5ab627a (plain)
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
/*
 * "git push"
 */
#include "cache.h"
#include "refs.h"
#include "run-command.h"
#include "builtin.h"
 
#define MAX_URI (16)
 
static const char push_usage[] = "git-push [--all] [--tags] [--receive-pack=<git-receive-pack>] [--repo=all] [-f | --force] [-v] [<repository> <refspec>...]";
 
static int all, tags, force, thin = 1, verbose;
static const char *receivepack;
 
#define BUF_SIZE (2084)
static char buffer[BUF_SIZE];
 
static const char **refspec;
static int refspec_nr;
 
static void add_refspec(const char *ref)
{
	int nr = refspec_nr + 1;
	refspec = xrealloc(refspec, nr * sizeof(char *));
	refspec[nr-1] = ref;
	refspec_nr = nr;
}
 
static int expand_one_ref(const char *ref, const unsigned char *sha1, int flag, void *cb_data)
{
	/* Ignore the "refs/" at the beginning of the refname */
	ref += 5;
 
	if (!prefixcmp(ref, "tags/"))
		add_refspec(xstrdup(ref));
	return 0;
}
 
static void expand_refspecs(void)
{
	if (all) {
		if (refspec_nr)
			die("cannot mix '--all' and a refspec");
 
		/*
		 * No need to expand "--all" - we'll just use
		 * the "--all" flag to send-pack
		 */
		return;
	}
	if (!tags)
		return;
	for_each_ref(expand_one_ref, NULL);
}
 
struct wildcard_cb {
	const char *from_prefix;
	int from_prefix_len;
	const char *to_prefix;
	int to_prefix_len;
	int force;
};
 
static int expand_wildcard_ref(const char *ref, const unsigned char *sha1, int flag, void *cb_data)
{
	struct wildcard_cb *cb = cb_data;
	int len = strlen(ref);
	char *expanded, *newref;
 
	if (len < cb->from_prefix_len ||
	    memcmp(cb->from_prefix, ref, cb->from_prefix_len))
		return 0;
	expanded = xmalloc(len * 2 + cb->force +
			   (cb->to_prefix_len - cb->from_prefix_len) + 2);
	newref = expanded + cb->force;
	if (cb->force)
		expanded[0] = '+';
	memcpy(newref, ref, len);
	newref[len] = ':';
	memcpy(newref + len + 1, cb->to_prefix, cb->to_prefix_len);
	strcpy(newref + len + 1 + cb->to_prefix_len,
	       ref + cb->from_prefix_len);
	add_refspec(expanded);
	return 0;
}
 
static int wildcard_ref(const char *ref)
{
	int len;
	const char *colon;
	struct wildcard_cb cb;
 
	memset(&cb, 0, sizeof(cb));
	if (ref[0] == '+') {
		cb.force = 1;
		ref++;
	}
	len = strlen(ref);
	colon = strchr(ref, ':');
	if (! (colon && ref < colon &&
	       colon[-2] == '/' && colon[-1] == '*' &&
	       /* "<mine>/<asterisk>:<yours>/<asterisk>" is at least 7 bytes */
	       7 <= len &&
	       ref[len-2] == '/' && ref[len-1] == '*') )
		return 0 ;
	cb.from_prefix = ref;
	cb.from_prefix_len = colon - ref - 1;
	cb.to_prefix = colon + 1;
	cb.to_prefix_len = len - (colon - ref) - 2;
	for_each_ref(expand_wildcard_ref, &cb);
	return 1;
}
 
static void set_refspecs(const char **refs, int nr)
{
	if (nr) {
		int i;
		for (i = 0; i < nr; i++) {
			const char *ref = refs[i];
			if (!strcmp("tag", ref)) {
				char *tag;
				int len;
				if (nr <= ++i)
					die("tag shorthand without <tag>");
				len = strlen(refs[i]) + 11;
				tag = xmalloc(len);
				strcpy(tag, "refs/tags/");
				strcat(tag, refs[i]);
				ref = tag;
			}
			else if (wildcard_ref(ref))
				continue;
			add_refspec(ref);
		}
	}
	expand_refspecs();
}
 
static int get_remotes_uri(const char *repo, const char *uri[MAX_URI])
{
	int n = 0;
	FILE *f = fopen(git_path("remotes/%s", repo), "r");
	int has_explicit_refspec = refspec_nr || all || tags;
 
	if (!f)
		return -1;
	while (fgets(buffer, BUF_SIZE, f)) {
		int is_refspec;
		char *s, *p;
 
		if (!(-prefixcmp(buffer, "URL:"))) {
			is_refspec = 0;
			s = buffer + 4;
		} else if (!(-prefixcmp(buffer, "Push:"))) {
			is_refspec = 1;
			s = buffer + 5;
		} else
			continue;
 
		/* Remove whitespace at the head.. */
		while (isspace(*s))
			s++;
		if (!*s)
			continue;
 
		/* ..and at the end */
		p = s + strlen(s);
		while (isspace(p[-1]))
			*--p = 0;
 
		if (!is_refspec) {
			if (n < MAX_URI)
				uri[n++] = xstrdup(s);
			else
				error("more than %d URL's specified, ignoring the rest", MAX_URI);
		}
		else if (is_refspec && !has_explicit_refspec) {
			if (!wildcard_ref(s))
				add_refspec(xstrdup(s));
		}
	}
	fclose(f);
	if (!n)
		die("remote '%s' has no URL", repo);
	return n;
}
 
static const char **config_uri;
static const char *config_repo;
static int config_repo_len;
static int config_current_uri;
static int config_get_refspecs;
static int config_get_receivepack;
 
static int get_remote_config(const char* key, const char* value)
{
	if (!prefixcmp(key, "remote.") &&
	    !strncmp(key + 7, config_repo, config_repo_len)) {
		if (!strcmp(key + 7 + config_repo_len, ".url")) {
			if (config_current_uri < MAX_URI)
				config_uri[config_current_uri++] = xstrdup(value);
			else
				error("more than %d URL's specified, ignoring the rest", MAX_URI);
		}
		else if (config_get_refspecs &&
			 !strcmp(key + 7 + config_repo_len, ".push")) {
			if (!wildcard_ref(value))
				add_refspec(xstrdup(value));
		}
		else if (config_get_receivepack &&
			 !strcmp(key + 7 + config_repo_len, ".receivepack")) {
			if (!receivepack) {
				char *rp = xmalloc(strlen(value) + 16);
				sprintf(rp, "--receive-pack=%s", value);
				receivepack = rp;
			} else
				error("more than one receivepack given, using the first");
		}
	}
	return 0;
}
 
static int get_config_remotes_uri(const char *repo, const char *uri[MAX_URI])
{
	config_repo_len = strlen(repo);
	config_repo = repo;
	config_current_uri = 0;
	config_uri = uri;
	config_get_refspecs = !(refspec_nr || all || tags);
	config_get_receivepack = (receivepack == NULL);
 
	git_config(get_remote_config);
	return config_current_uri;
}
 
static int get_branches_uri(const char *repo, const char *uri[MAX_URI])
{
	const char *slash = strchr(repo, '/');
	int n = slash ? slash - repo : 1000;
	FILE *f = fopen(git_path("branches/%.*s", n, repo), "r");
	char *s, *p;
	int len;
 
	if (!f)
		return 0;
	s = fgets(buffer, BUF_SIZE, f);
	fclose(f);
	if (!s)
		return 0;
	while (isspace(*s))
		s++;
	if (!*s)
		return 0;
	p = s + strlen(s);
	while (isspace(p[-1]))
		*--p = 0;
	len = p - s;
	if (slash)
		len += strlen(slash);
	p = xmalloc(len + 1);
	strcpy(p, s);
	if (slash)
		strcat(p, slash);
	uri[0] = p;
	return 1;
}
 
/*
 * Read remotes and branches file, fill the push target URI
 * list.  If there is no command line refspecs, read Push: lines
 * to set up the *refspec list as well.
 * return the number of push target URIs
 */
static int read_config(const char *repo, const char *uri[MAX_URI])
{
	int n;
 
	if (*repo != '/') {
		n = get_remotes_uri(repo, uri);
		if (n > 0)
			return n;
 
		n = get_config_remotes_uri(repo, uri);
		if (n > 0)
			return n;
 
		n = get_branches_uri(repo, uri);
		if (n > 0)
			return n;
	}
 
	uri[0] = repo;
	return 1;
}
 
static int do_push(const char *repo)
{
	const char *uri[MAX_URI];
	int i, n;
	int common_argc;
	const char **argv;
	int argc;
 
	n = read_config(repo, uri);
	if (n <= 0)
		die("bad repository '%s'", repo);
 
	argv = xmalloc((refspec_nr + 10) * sizeof(char *));
	argv[0] = "dummy-send-pack";
	argc = 1;
	if (all)
		argv[argc++] = "--all";
	if (force)
		argv[argc++] = "--force";
	if (receivepack)
		argv[argc++] = receivepack;
	common_argc = argc;
 
	for (i = 0; i < n; i++) {
		int err;
		int dest_argc = common_argc;
		int dest_refspec_nr = refspec_nr;
		const char **dest_refspec = refspec;
		const char *dest = uri[i];
		const char *sender = "git-send-pack";
		if (!prefixcmp(dest, "http://") ||
		    !prefixcmp(dest, "https://"))
			sender = "git-http-push";
		else if (thin)
			argv[dest_argc++] = "--thin";
		argv[0] = sender;
		argv[dest_argc++] = dest;
		while (dest_refspec_nr--)
			argv[dest_argc++] = *dest_refspec++;
		argv[dest_argc] = NULL;
		if (verbose)
			fprintf(stderr, "Pushing to %s\n", dest);
		err = run_command_v(argv);
		if (!err)
			continue;
		switch (err) {
		case -ERR_RUN_COMMAND_FORK:
			die("unable to fork for %s", sender);
		case -ERR_RUN_COMMAND_EXEC:
			die("unable to exec %s", sender);
		case -ERR_RUN_COMMAND_WAITPID:
		case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
		case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
		case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
			die("%s died with strange error", sender);
		default:
			return -err;
		}
	}
	return 0;
}
 
int cmd_push(int argc, const char **argv, const char *prefix)
{
	int i;
	const char *repo = "origin";	/* default repository */
 
	for (i = 1; i < argc; i++) {
		const char *arg = argv[i];
 
		if (arg[0] != '-') {
			repo = arg;
			i++;
			break;
		}
		if (!strcmp(arg, "-v")) {
			verbose=1;
			continue;
		}
		if (!prefixcmp(arg, "--repo=")) {
			repo = arg+7;
			continue;
		}
		if (!strcmp(arg, "--all")) {
			all = 1;
			continue;
		}
		if (!strcmp(arg, "--tags")) {
			tags = 1;
			continue;
		}
		if (!strcmp(arg, "--force") || !strcmp(arg, "-f")) {
			force = 1;
			continue;
		}
		if (!strcmp(arg, "--thin")) {
			thin = 1;
			continue;
		}
		if (!strcmp(arg, "--no-thin")) {
			thin = 0;
			continue;
		}
		if (!prefixcmp(arg, "--receive-pack=")) {
			receivepack = arg;
			continue;
		}
		if (!prefixcmp(arg, "--exec=")) {
			receivepack = arg;
			continue;
		}
		usage(push_usage);
	}
	set_refspecs(argv + i, argc - i);
	return do_push(repo);
}