builtin-commit: add --date option
[git/vmiklos.git] / transport-helper.c
blob5078c7100f16e9d7ac08aad05e3797ad5b6626bc
1 #include "cache.h"
2 #include "transport.h"
3 #include "quote.h"
4 #include "run-command.h"
5 #include "commit.h"
6 #include "diff.h"
7 #include "revision.h"
8 #include "quote.h"
10 struct helper_data
12 const char *name;
13 struct child_process *helper;
14 FILE *out;
15 unsigned fetch : 1,
16 option : 1,
17 push : 1;
20 static struct child_process *get_helper(struct transport *transport)
22 struct helper_data *data = transport->data;
23 struct strbuf buf = STRBUF_INIT;
24 struct child_process *helper;
26 if (data->helper)
27 return data->helper;
29 helper = xcalloc(1, sizeof(*helper));
30 helper->in = -1;
31 helper->out = -1;
32 helper->err = 0;
33 helper->argv = xcalloc(4, sizeof(*helper->argv));
34 strbuf_addf(&buf, "remote-%s", data->name);
35 helper->argv[0] = strbuf_detach(&buf, NULL);
36 helper->argv[1] = transport->remote->name;
37 helper->argv[2] = transport->url;
38 helper->git_cmd = 1;
39 if (start_command(helper))
40 die("Unable to run helper: git %s", helper->argv[0]);
41 data->helper = helper;
43 write_str_in_full(helper->in, "capabilities\n");
45 data->out = xfdopen(helper->out, "r");
46 while (1) {
47 if (strbuf_getline(&buf, data->out, '\n') == EOF)
48 exit(128); /* child died, message supplied already */
50 if (!*buf.buf)
51 break;
52 if (!strcmp(buf.buf, "fetch"))
53 data->fetch = 1;
54 if (!strcmp(buf.buf, "option"))
55 data->option = 1;
56 if (!strcmp(buf.buf, "push"))
57 data->push = 1;
59 return data->helper;
62 static int disconnect_helper(struct transport *transport)
64 struct helper_data *data = transport->data;
65 if (data->helper) {
66 write_str_in_full(data->helper->in, "\n");
67 close(data->helper->in);
68 fclose(data->out);
69 finish_command(data->helper);
70 free((char *)data->helper->argv[0]);
71 free(data->helper->argv);
72 free(data->helper);
73 data->helper = NULL;
75 free(data);
76 return 0;
79 static const char *unsupported_options[] = {
80 TRANS_OPT_UPLOADPACK,
81 TRANS_OPT_RECEIVEPACK,
82 TRANS_OPT_THIN,
83 TRANS_OPT_KEEP
85 static const char *boolean_options[] = {
86 TRANS_OPT_THIN,
87 TRANS_OPT_KEEP,
88 TRANS_OPT_FOLLOWTAGS
91 static int set_helper_option(struct transport *transport,
92 const char *name, const char *value)
94 struct helper_data *data = transport->data;
95 struct child_process *helper = get_helper(transport);
96 struct strbuf buf = STRBUF_INIT;
97 int i, ret, is_bool = 0;
99 if (!data->option)
100 return 1;
102 for (i = 0; i < ARRAY_SIZE(unsupported_options); i++) {
103 if (!strcmp(name, unsupported_options[i]))
104 return 1;
107 for (i = 0; i < ARRAY_SIZE(boolean_options); i++) {
108 if (!strcmp(name, boolean_options[i])) {
109 is_bool = 1;
110 break;
114 strbuf_addf(&buf, "option %s ", name);
115 if (is_bool)
116 strbuf_addstr(&buf, value ? "true" : "false");
117 else
118 quote_c_style(value, &buf, NULL, 0);
119 strbuf_addch(&buf, '\n');
121 if (write_in_full(helper->in, buf.buf, buf.len) != buf.len)
122 die_errno("cannot send option to %s", data->name);
124 strbuf_reset(&buf);
125 if (strbuf_getline(&buf, data->out, '\n') == EOF)
126 exit(128); /* child died, message supplied already */
128 if (!strcmp(buf.buf, "ok"))
129 ret = 0;
130 else if (!prefixcmp(buf.buf, "error")) {
131 ret = -1;
132 } else if (!strcmp(buf.buf, "unsupported"))
133 ret = 1;
134 else {
135 warning("%s unexpectedly said: '%s'", data->name, buf.buf);
136 ret = 1;
138 strbuf_release(&buf);
139 return ret;
142 static void standard_options(struct transport *t)
144 char buf[16];
145 int n;
146 int v = t->verbose;
147 int no_progress = v < 0 || (!t->progress && !isatty(1));
149 set_helper_option(t, "progress", !no_progress ? "true" : "false");
151 n = snprintf(buf, sizeof(buf), "%d", v + 1);
152 if (n >= sizeof(buf))
153 die("impossibly large verbosity value");
154 set_helper_option(t, "verbosity", buf);
157 static int fetch_with_fetch(struct transport *transport,
158 int nr_heads, const struct ref **to_fetch)
160 struct helper_data *data = transport->data;
161 int i;
162 struct strbuf buf = STRBUF_INIT;
164 standard_options(transport);
166 for (i = 0; i < nr_heads; i++) {
167 const struct ref *posn = to_fetch[i];
168 if (posn->status & REF_STATUS_UPTODATE)
169 continue;
171 strbuf_addf(&buf, "fetch %s %s\n",
172 sha1_to_hex(posn->old_sha1), posn->name);
175 strbuf_addch(&buf, '\n');
176 if (write_in_full(data->helper->in, buf.buf, buf.len) != buf.len)
177 die_errno("cannot send fetch to %s", data->name);
179 while (1) {
180 strbuf_reset(&buf);
181 if (strbuf_getline(&buf, data->out, '\n') == EOF)
182 exit(128); /* child died, message supplied already */
184 if (!prefixcmp(buf.buf, "lock ")) {
185 const char *name = buf.buf + 5;
186 if (transport->pack_lockfile)
187 warning("%s also locked %s", data->name, name);
188 else
189 transport->pack_lockfile = xstrdup(name);
191 else if (!buf.len)
192 break;
193 else
194 warning("%s unexpectedly said: '%s'", data->name, buf.buf);
196 strbuf_release(&buf);
197 return 0;
200 static int fetch(struct transport *transport,
201 int nr_heads, const struct ref **to_fetch)
203 struct helper_data *data = transport->data;
204 int i, count;
206 count = 0;
207 for (i = 0; i < nr_heads; i++)
208 if (!(to_fetch[i]->status & REF_STATUS_UPTODATE))
209 count++;
211 if (!count)
212 return 0;
214 if (data->fetch)
215 return fetch_with_fetch(transport, nr_heads, to_fetch);
217 return -1;
220 static int push_refs(struct transport *transport,
221 struct ref *remote_refs, int flags)
223 int force_all = flags & TRANSPORT_PUSH_FORCE;
224 int mirror = flags & TRANSPORT_PUSH_MIRROR;
225 struct helper_data *data = transport->data;
226 struct strbuf buf = STRBUF_INIT;
227 struct child_process *helper;
228 struct ref *ref;
230 if (!remote_refs)
231 return 0;
233 helper = get_helper(transport);
234 if (!data->push)
235 return 1;
237 for (ref = remote_refs; ref; ref = ref->next) {
238 if (ref->peer_ref)
239 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
240 else if (!mirror)
241 continue;
243 ref->deletion = is_null_sha1(ref->new_sha1);
244 if (!ref->deletion &&
245 !hashcmp(ref->old_sha1, ref->new_sha1)) {
246 ref->status = REF_STATUS_UPTODATE;
247 continue;
250 if (force_all)
251 ref->force = 1;
253 strbuf_addstr(&buf, "push ");
254 if (!ref->deletion) {
255 if (ref->force)
256 strbuf_addch(&buf, '+');
257 if (ref->peer_ref)
258 strbuf_addstr(&buf, ref->peer_ref->name);
259 else
260 strbuf_addstr(&buf, sha1_to_hex(ref->new_sha1));
262 strbuf_addch(&buf, ':');
263 strbuf_addstr(&buf, ref->name);
264 strbuf_addch(&buf, '\n');
266 if (buf.len == 0)
267 return 0;
269 transport->verbose = flags & TRANSPORT_PUSH_VERBOSE ? 1 : 0;
270 standard_options(transport);
272 if (flags & TRANSPORT_PUSH_DRY_RUN) {
273 if (set_helper_option(transport, "dry-run", "true") != 0)
274 die("helper %s does not support dry-run", data->name);
277 strbuf_addch(&buf, '\n');
278 if (write_in_full(helper->in, buf.buf, buf.len) != buf.len)
279 exit(128);
281 ref = remote_refs;
282 while (1) {
283 char *refname, *msg;
284 int status;
286 strbuf_reset(&buf);
287 if (strbuf_getline(&buf, data->out, '\n') == EOF)
288 exit(128); /* child died, message supplied already */
289 if (!buf.len)
290 break;
292 if (!prefixcmp(buf.buf, "ok ")) {
293 status = REF_STATUS_OK;
294 refname = buf.buf + 3;
295 } else if (!prefixcmp(buf.buf, "error ")) {
296 status = REF_STATUS_REMOTE_REJECT;
297 refname = buf.buf + 6;
298 } else
299 die("expected ok/error, helper said '%s'\n", buf.buf);
301 msg = strchr(refname, ' ');
302 if (msg) {
303 struct strbuf msg_buf = STRBUF_INIT;
304 const char *end;
306 *msg++ = '\0';
307 if (!unquote_c_style(&msg_buf, msg, &end))
308 msg = strbuf_detach(&msg_buf, NULL);
309 else
310 msg = xstrdup(msg);
311 strbuf_release(&msg_buf);
313 if (!strcmp(msg, "no match")) {
314 status = REF_STATUS_NONE;
315 free(msg);
316 msg = NULL;
318 else if (!strcmp(msg, "up to date")) {
319 status = REF_STATUS_UPTODATE;
320 free(msg);
321 msg = NULL;
323 else if (!strcmp(msg, "non-fast forward")) {
324 status = REF_STATUS_REJECT_NONFASTFORWARD;
325 free(msg);
326 msg = NULL;
330 if (ref)
331 ref = find_ref_by_name(ref, refname);
332 if (!ref)
333 ref = find_ref_by_name(remote_refs, refname);
334 if (!ref) {
335 warning("helper reported unexpected status of %s", refname);
336 continue;
339 ref->status = status;
340 ref->remote_status = msg;
342 strbuf_release(&buf);
343 return 0;
346 static struct ref *get_refs_list(struct transport *transport, int for_push)
348 struct helper_data *data = transport->data;
349 struct child_process *helper;
350 struct ref *ret = NULL;
351 struct ref **tail = &ret;
352 struct ref *posn;
353 struct strbuf buf = STRBUF_INIT;
355 helper = get_helper(transport);
357 if (data->push && for_push)
358 write_str_in_full(helper->in, "list for-push\n");
359 else
360 write_str_in_full(helper->in, "list\n");
362 while (1) {
363 char *eov, *eon;
364 if (strbuf_getline(&buf, data->out, '\n') == EOF)
365 exit(128); /* child died, message supplied already */
367 if (!*buf.buf)
368 break;
370 eov = strchr(buf.buf, ' ');
371 if (!eov)
372 die("Malformed response in ref list: %s", buf.buf);
373 eon = strchr(eov + 1, ' ');
374 *eov = '\0';
375 if (eon)
376 *eon = '\0';
377 *tail = alloc_ref(eov + 1);
378 if (buf.buf[0] == '@')
379 (*tail)->symref = xstrdup(buf.buf + 1);
380 else if (buf.buf[0] != '?')
381 get_sha1_hex(buf.buf, (*tail)->old_sha1);
382 tail = &((*tail)->next);
384 strbuf_release(&buf);
386 for (posn = ret; posn; posn = posn->next)
387 resolve_remote_symref(posn, ret);
389 return ret;
392 int transport_helper_init(struct transport *transport, const char *name)
394 struct helper_data *data = xcalloc(sizeof(*data), 1);
395 data->name = name;
397 transport->data = data;
398 transport->set_option = set_helper_option;
399 transport->get_refs_list = get_refs_list;
400 transport->fetch = fetch;
401 transport->push_refs = push_refs;
402 transport->disconnect = disconnect_helper;
403 return 0;