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Commit | Line | Data |
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1e1ea69f PT |
1 | /* |
2 | * Builtin "git pull" | |
3 | * | |
4 | * Based on git-pull.sh by Junio C Hamano | |
5 | * | |
6 | * Fetch one or more remote refs and merge it/them into the current HEAD. | |
7 | */ | |
8 | #include "cache.h" | |
b2141fc1 | 9 | #include "config.h" |
1e1ea69f PT |
10 | #include "builtin.h" |
11 | #include "parse-options.h" | |
d807c4a0 | 12 | #include "exec-cmd.h" |
f2c5baa1 | 13 | #include "run-command.h" |
44c175c7 PT |
14 | #include "sha1-array.h" |
15 | #include "remote.h" | |
4a4cf9e8 | 16 | #include "dir.h" |
49ec402d | 17 | #include "refs.h" |
ec0cb496 | 18 | #include "refspec.h" |
8944969c | 19 | #include "revision.h" |
a6d7eb2c SB |
20 | #include "submodule.h" |
21 | #include "submodule-config.h" | |
db86e61c | 22 | #include "tempfile.h" |
8944969c | 23 | #include "lockfile.h" |
fd84986f | 24 | #include "wt-status.h" |
1e1ea69f | 25 | |
1678b81e PT |
26 | enum rebase_type { |
27 | REBASE_INVALID = -1, | |
28 | REBASE_FALSE = 0, | |
29 | REBASE_TRUE, | |
f5eb87b9 JS |
30 | REBASE_PRESERVE, |
31 | REBASE_INTERACTIVE | |
1678b81e PT |
32 | }; |
33 | ||
34 | /** | |
35 | * Parses the value of --rebase. If value is a false value, returns | |
36 | * REBASE_FALSE. If value is a true value, returns REBASE_TRUE. If value is | |
37 | * "preserve", returns REBASE_PRESERVE. If value is a invalid value, dies with | |
38 | * a fatal error if fatal is true, otherwise returns REBASE_INVALID. | |
39 | */ | |
40 | static enum rebase_type parse_config_rebase(const char *key, const char *value, | |
41 | int fatal) | |
42 | { | |
89576613 | 43 | int v = git_parse_maybe_bool(value); |
1678b81e PT |
44 | |
45 | if (!v) | |
46 | return REBASE_FALSE; | |
47 | else if (v > 0) | |
48 | return REBASE_TRUE; | |
49 | else if (!strcmp(value, "preserve")) | |
50 | return REBASE_PRESERVE; | |
f5eb87b9 JS |
51 | else if (!strcmp(value, "interactive")) |
52 | return REBASE_INTERACTIVE; | |
1678b81e PT |
53 | |
54 | if (fatal) | |
55 | die(_("Invalid value for %s: %s"), key, value); | |
56 | else | |
57 | error(_("Invalid value for %s: %s"), key, value); | |
58 | ||
59 | return REBASE_INVALID; | |
60 | } | |
61 | ||
62 | /** | |
63 | * Callback for --rebase, which parses arg with parse_config_rebase(). | |
64 | */ | |
65 | static int parse_opt_rebase(const struct option *opt, const char *arg, int unset) | |
66 | { | |
67 | enum rebase_type *value = opt->value; | |
68 | ||
69 | if (arg) | |
70 | *value = parse_config_rebase("--rebase", arg, 0); | |
71 | else | |
72 | *value = unset ? REBASE_FALSE : REBASE_TRUE; | |
73 | return *value == REBASE_INVALID ? -1 : 0; | |
74 | } | |
75 | ||
1e1ea69f | 76 | static const char * const pull_usage[] = { |
e7a7401f | 77 | N_("git pull [<options>] [<repository> [<refspec>...]]"), |
1e1ea69f PT |
78 | NULL |
79 | }; | |
80 | ||
2a747902 PT |
81 | /* Shared options */ |
82 | static int opt_verbosity; | |
83 | static char *opt_progress; | |
a6d7eb2c | 84 | static int recurse_submodules = RECURSE_SUBMODULES_DEFAULT; |
2a747902 | 85 | |
1678b81e | 86 | /* Options passed to git-merge or git-rebase */ |
81dbd768 | 87 | static enum rebase_type opt_rebase = -1; |
11b6d178 PT |
88 | static char *opt_diffstat; |
89 | static char *opt_log; | |
3a4d2c74 | 90 | static char *opt_signoff; |
11b6d178 PT |
91 | static char *opt_squash; |
92 | static char *opt_commit; | |
93 | static char *opt_edit; | |
94 | static char *opt_ff; | |
95 | static char *opt_verify_signatures; | |
f66398eb | 96 | static int opt_autostash = -1; |
c48d73bd | 97 | static int config_autostash; |
11b6d178 PT |
98 | static struct argv_array opt_strategies = ARGV_ARRAY_INIT; |
99 | static struct argv_array opt_strategy_opts = ARGV_ARRAY_INIT; | |
100 | static char *opt_gpg_sign; | |
09c2cb87 | 101 | static int opt_allow_unrelated_histories; |
11b6d178 | 102 | |
a32975f5 PT |
103 | /* Options passed to git-fetch */ |
104 | static char *opt_all; | |
105 | static char *opt_append; | |
106 | static char *opt_upload_pack; | |
107 | static int opt_force; | |
108 | static char *opt_tags; | |
109 | static char *opt_prune; | |
62104ba1 | 110 | static char *max_children; |
a32975f5 PT |
111 | static int opt_dry_run; |
112 | static char *opt_keep; | |
113 | static char *opt_depth; | |
114 | static char *opt_unshallow; | |
115 | static char *opt_update_shallow; | |
116 | static char *opt_refmap; | |
ffb4568a WS |
117 | static char *opt_ipv4; |
118 | static char *opt_ipv6; | |
a32975f5 | 119 | |
1e1ea69f | 120 | static struct option pull_options[] = { |
2a747902 PT |
121 | /* Shared options */ |
122 | OPT__VERBOSITY(&opt_verbosity), | |
123 | OPT_PASSTHRU(0, "progress", &opt_progress, NULL, | |
124 | N_("force progress reporting"), | |
125 | PARSE_OPT_NOARG), | |
a6d7eb2c SB |
126 | { OPTION_CALLBACK, 0, "recurse-submodules", |
127 | &recurse_submodules, N_("on-demand"), | |
128 | N_("control for recursive fetching of submodules"), | |
129 | PARSE_OPT_OPTARG, option_fetch_parse_recurse_submodules }, | |
2a747902 | 130 | |
1678b81e | 131 | /* Options passed to git-merge or git-rebase */ |
11b6d178 | 132 | OPT_GROUP(N_("Options related to merging")), |
1678b81e | 133 | { OPTION_CALLBACK, 'r', "rebase", &opt_rebase, |
f5eb87b9 | 134 | "false|true|preserve|interactive", |
1678b81e PT |
135 | N_("incorporate changes by rebasing rather than merging"), |
136 | PARSE_OPT_OPTARG, parse_opt_rebase }, | |
11b6d178 PT |
137 | OPT_PASSTHRU('n', NULL, &opt_diffstat, NULL, |
138 | N_("do not show a diffstat at the end of the merge"), | |
139 | PARSE_OPT_NOARG | PARSE_OPT_NONEG), | |
140 | OPT_PASSTHRU(0, "stat", &opt_diffstat, NULL, | |
141 | N_("show a diffstat at the end of the merge"), | |
142 | PARSE_OPT_NOARG), | |
143 | OPT_PASSTHRU(0, "summary", &opt_diffstat, NULL, | |
144 | N_("(synonym to --stat)"), | |
145 | PARSE_OPT_NOARG | PARSE_OPT_HIDDEN), | |
146 | OPT_PASSTHRU(0, "log", &opt_log, N_("n"), | |
147 | N_("add (at most <n>) entries from shortlog to merge commit message"), | |
148 | PARSE_OPT_OPTARG), | |
3a4d2c74 TK |
149 | OPT_PASSTHRU(0, "signoff", &opt_signoff, NULL, |
150 | N_("add Signed-off-by:"), | |
151 | PARSE_OPT_OPTARG), | |
11b6d178 PT |
152 | OPT_PASSTHRU(0, "squash", &opt_squash, NULL, |
153 | N_("create a single commit instead of doing a merge"), | |
154 | PARSE_OPT_NOARG), | |
155 | OPT_PASSTHRU(0, "commit", &opt_commit, NULL, | |
156 | N_("perform a commit if the merge succeeds (default)"), | |
157 | PARSE_OPT_NOARG), | |
158 | OPT_PASSTHRU(0, "edit", &opt_edit, NULL, | |
159 | N_("edit message before committing"), | |
160 | PARSE_OPT_NOARG), | |
161 | OPT_PASSTHRU(0, "ff", &opt_ff, NULL, | |
162 | N_("allow fast-forward"), | |
163 | PARSE_OPT_NOARG), | |
164 | OPT_PASSTHRU(0, "ff-only", &opt_ff, NULL, | |
165 | N_("abort if fast-forward is not possible"), | |
166 | PARSE_OPT_NOARG | PARSE_OPT_NONEG), | |
167 | OPT_PASSTHRU(0, "verify-signatures", &opt_verify_signatures, NULL, | |
168 | N_("verify that the named commit has a valid GPG signature"), | |
169 | PARSE_OPT_NOARG), | |
f66398eb MJ |
170 | OPT_BOOL(0, "autostash", &opt_autostash, |
171 | N_("automatically stash/stash pop before and after rebase")), | |
11b6d178 PT |
172 | OPT_PASSTHRU_ARGV('s', "strategy", &opt_strategies, N_("strategy"), |
173 | N_("merge strategy to use"), | |
174 | 0), | |
175 | OPT_PASSTHRU_ARGV('X', "strategy-option", &opt_strategy_opts, | |
176 | N_("option=value"), | |
177 | N_("option for selected merge strategy"), | |
178 | 0), | |
179 | OPT_PASSTHRU('S', "gpg-sign", &opt_gpg_sign, N_("key-id"), | |
180 | N_("GPG sign commit"), | |
181 | PARSE_OPT_OPTARG), | |
09c2cb87 JH |
182 | OPT_SET_INT(0, "allow-unrelated-histories", |
183 | &opt_allow_unrelated_histories, | |
184 | N_("allow merging unrelated histories"), 1), | |
11b6d178 | 185 | |
a32975f5 PT |
186 | /* Options passed to git-fetch */ |
187 | OPT_GROUP(N_("Options related to fetching")), | |
188 | OPT_PASSTHRU(0, "all", &opt_all, NULL, | |
189 | N_("fetch from all remotes"), | |
190 | PARSE_OPT_NOARG), | |
191 | OPT_PASSTHRU('a', "append", &opt_append, NULL, | |
192 | N_("append to .git/FETCH_HEAD instead of overwriting"), | |
193 | PARSE_OPT_NOARG), | |
194 | OPT_PASSTHRU(0, "upload-pack", &opt_upload_pack, N_("path"), | |
195 | N_("path to upload pack on remote end"), | |
196 | 0), | |
1224781d | 197 | OPT__FORCE(&opt_force, N_("force overwrite of local branch"), 0), |
a32975f5 PT |
198 | OPT_PASSTHRU('t', "tags", &opt_tags, NULL, |
199 | N_("fetch all tags and associated objects"), | |
200 | PARSE_OPT_NOARG), | |
201 | OPT_PASSTHRU('p', "prune", &opt_prune, NULL, | |
202 | N_("prune remote-tracking branches no longer on remote"), | |
203 | PARSE_OPT_NOARG), | |
62104ba1 SB |
204 | OPT_PASSTHRU('j', "jobs", &max_children, N_("n"), |
205 | N_("number of submodules pulled in parallel"), | |
206 | PARSE_OPT_OPTARG), | |
a32975f5 PT |
207 | OPT_BOOL(0, "dry-run", &opt_dry_run, |
208 | N_("dry run")), | |
209 | OPT_PASSTHRU('k', "keep", &opt_keep, NULL, | |
210 | N_("keep downloaded pack"), | |
211 | PARSE_OPT_NOARG), | |
212 | OPT_PASSTHRU(0, "depth", &opt_depth, N_("depth"), | |
213 | N_("deepen history of shallow clone"), | |
214 | 0), | |
215 | OPT_PASSTHRU(0, "unshallow", &opt_unshallow, NULL, | |
216 | N_("convert to a complete repository"), | |
217 | PARSE_OPT_NONEG | PARSE_OPT_NOARG), | |
218 | OPT_PASSTHRU(0, "update-shallow", &opt_update_shallow, NULL, | |
219 | N_("accept refs that update .git/shallow"), | |
220 | PARSE_OPT_NOARG), | |
221 | OPT_PASSTHRU(0, "refmap", &opt_refmap, N_("refmap"), | |
222 | N_("specify fetch refmap"), | |
223 | PARSE_OPT_NONEG), | |
ffb4568a WS |
224 | OPT_PASSTHRU('4', "ipv4", &opt_ipv4, NULL, |
225 | N_("use IPv4 addresses only"), | |
226 | PARSE_OPT_NOARG), | |
227 | OPT_PASSTHRU('6', "ipv6", &opt_ipv6, NULL, | |
228 | N_("use IPv6 addresses only"), | |
229 | PARSE_OPT_NOARG), | |
a32975f5 | 230 | |
1e1ea69f PT |
231 | OPT_END() |
232 | }; | |
233 | ||
2a747902 PT |
234 | /** |
235 | * Pushes "-q" or "-v" switches into arr to match the opt_verbosity level. | |
236 | */ | |
237 | static void argv_push_verbosity(struct argv_array *arr) | |
238 | { | |
239 | int verbosity; | |
240 | ||
241 | for (verbosity = opt_verbosity; verbosity > 0; verbosity--) | |
242 | argv_array_push(arr, "-v"); | |
243 | ||
244 | for (verbosity = opt_verbosity; verbosity < 0; verbosity++) | |
245 | argv_array_push(arr, "-q"); | |
246 | } | |
247 | ||
a32975f5 PT |
248 | /** |
249 | * Pushes "-f" switches into arr to match the opt_force level. | |
250 | */ | |
251 | static void argv_push_force(struct argv_array *arr) | |
252 | { | |
253 | int force = opt_force; | |
254 | while (force-- > 0) | |
255 | argv_array_push(arr, "-f"); | |
256 | } | |
257 | ||
41fca098 PT |
258 | /** |
259 | * Sets the GIT_REFLOG_ACTION environment variable to the concatenation of argv | |
260 | */ | |
261 | static void set_reflog_message(int argc, const char **argv) | |
262 | { | |
263 | int i; | |
264 | struct strbuf msg = STRBUF_INIT; | |
265 | ||
266 | for (i = 0; i < argc; i++) { | |
267 | if (i) | |
268 | strbuf_addch(&msg, ' '); | |
269 | strbuf_addstr(&msg, argv[i]); | |
270 | } | |
271 | ||
272 | setenv("GIT_REFLOG_ACTION", msg.buf, 0); | |
273 | ||
274 | strbuf_release(&msg); | |
275 | } | |
276 | ||
a9de9897 PT |
277 | /** |
278 | * If pull.ff is unset, returns NULL. If pull.ff is "true", returns "--ff". If | |
279 | * pull.ff is "false", returns "--no-ff". If pull.ff is "only", returns | |
280 | * "--ff-only". Otherwise, if pull.ff is set to an invalid value, die with an | |
281 | * error. | |
282 | */ | |
283 | static const char *config_get_ff(void) | |
284 | { | |
285 | const char *value; | |
286 | ||
287 | if (git_config_get_value("pull.ff", &value)) | |
288 | return NULL; | |
289 | ||
89576613 | 290 | switch (git_parse_maybe_bool(value)) { |
a9de9897 PT |
291 | case 0: |
292 | return "--no-ff"; | |
293 | case 1: | |
294 | return "--ff"; | |
295 | } | |
296 | ||
297 | if (!strcmp(value, "only")) | |
298 | return "--ff-only"; | |
299 | ||
300 | die(_("Invalid value for pull.ff: %s"), value); | |
301 | } | |
302 | ||
81dbd768 PT |
303 | /** |
304 | * Returns the default configured value for --rebase. It first looks for the | |
305 | * value of "branch.$curr_branch.rebase", where $curr_branch is the current | |
306 | * branch, and if HEAD is detached or the configuration key does not exist, | |
307 | * looks for the value of "pull.rebase". If both configuration keys do not | |
308 | * exist, returns REBASE_FALSE. | |
309 | */ | |
310 | static enum rebase_type config_get_rebase(void) | |
311 | { | |
312 | struct branch *curr_branch = branch_get("HEAD"); | |
313 | const char *value; | |
314 | ||
315 | if (curr_branch) { | |
316 | char *key = xstrfmt("branch.%s.rebase", curr_branch->name); | |
317 | ||
318 | if (!git_config_get_value(key, &value)) { | |
319 | enum rebase_type ret = parse_config_rebase(key, value, 1); | |
320 | free(key); | |
321 | return ret; | |
322 | } | |
323 | ||
324 | free(key); | |
325 | } | |
326 | ||
327 | if (!git_config_get_value("pull.rebase", &value)) | |
328 | return parse_config_rebase("pull.rebase", value, 1); | |
329 | ||
330 | return REBASE_FALSE; | |
331 | } | |
332 | ||
c48d73bd MJ |
333 | /** |
334 | * Read config variables. | |
335 | */ | |
336 | static int git_pull_config(const char *var, const char *value, void *cb) | |
337 | { | |
338 | if (!strcmp(var, "rebase.autostash")) { | |
339 | config_autostash = git_config_bool(var, value); | |
340 | return 0; | |
121e43fa NMC |
341 | } else if (!strcmp(var, "submodule.recurse")) { |
342 | recurse_submodules = git_config_bool(var, value) ? | |
343 | RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF; | |
344 | return 0; | |
c48d73bd MJ |
345 | } |
346 | return git_default_config(var, value, cb); | |
347 | } | |
348 | ||
44c175c7 PT |
349 | /** |
350 | * Appends merge candidates from FETCH_HEAD that are not marked not-for-merge | |
351 | * into merge_heads. | |
352 | */ | |
910650d2 | 353 | static void get_merge_heads(struct oid_array *merge_heads) |
44c175c7 | 354 | { |
ca03e067 | 355 | const char *filename = git_path_fetch_head(); |
44c175c7 PT |
356 | FILE *fp; |
357 | struct strbuf sb = STRBUF_INIT; | |
14bb40b3 | 358 | struct object_id oid; |
44c175c7 | 359 | |
23a9e071 | 360 | fp = xfopen(filename, "r"); |
8f309aeb | 361 | while (strbuf_getline_lf(&sb, fp) != EOF) { |
14bb40b3 | 362 | if (get_oid_hex(sb.buf, &oid)) |
44c175c7 PT |
363 | continue; /* invalid line: does not start with SHA1 */ |
364 | if (starts_with(sb.buf + GIT_SHA1_HEXSZ, "\tnot-for-merge\t")) | |
365 | continue; /* ref is not-for-merge */ | |
910650d2 | 366 | oid_array_append(merge_heads, &oid); |
44c175c7 PT |
367 | } |
368 | fclose(fp); | |
369 | strbuf_release(&sb); | |
370 | } | |
371 | ||
372 | /** | |
373 | * Used by die_no_merge_candidates() as a for_each_remote() callback to | |
374 | * retrieve the name of the remote if the repository only has one remote. | |
375 | */ | |
376 | static int get_only_remote(struct remote *remote, void *cb_data) | |
377 | { | |
378 | const char **remote_name = cb_data; | |
379 | ||
380 | if (*remote_name) | |
381 | return -1; | |
382 | ||
383 | *remote_name = remote->name; | |
384 | return 0; | |
385 | } | |
386 | ||
387 | /** | |
388 | * Dies with the appropriate reason for why there are no merge candidates: | |
389 | * | |
390 | * 1. We fetched from a specific remote, and a refspec was given, but it ended | |
391 | * up not fetching anything. This is usually because the user provided a | |
392 | * wildcard refspec which had no matches on the remote end. | |
393 | * | |
394 | * 2. We fetched from a non-default remote, but didn't specify a branch to | |
395 | * merge. We can't use the configured one because it applies to the default | |
396 | * remote, thus the user must specify the branches to merge. | |
397 | * | |
398 | * 3. We fetched from the branch's or repo's default remote, but: | |
399 | * | |
400 | * a. We are not on a branch, so there will never be a configured branch to | |
401 | * merge with. | |
402 | * | |
403 | * b. We are on a branch, but there is no configured branch to merge with. | |
404 | * | |
405 | * 4. We fetched from the branch's or repo's default remote, but the configured | |
406 | * branch to merge didn't get fetched. (Either it doesn't exist, or wasn't | |
407 | * part of the configured fetch refspec.) | |
408 | */ | |
409 | static void NORETURN die_no_merge_candidates(const char *repo, const char **refspecs) | |
410 | { | |
411 | struct branch *curr_branch = branch_get("HEAD"); | |
412 | const char *remote = curr_branch ? curr_branch->remote_name : NULL; | |
413 | ||
414 | if (*refspecs) { | |
b7b31471 PT |
415 | if (opt_rebase) |
416 | fprintf_ln(stderr, _("There is no candidate for rebasing against among the refs that you just fetched.")); | |
417 | else | |
418 | fprintf_ln(stderr, _("There are no candidates for merging among the refs that you just fetched.")); | |
44c175c7 PT |
419 | fprintf_ln(stderr, _("Generally this means that you provided a wildcard refspec which had no\n" |
420 | "matches on the remote end.")); | |
421 | } else if (repo && curr_branch && (!remote || strcmp(repo, remote))) { | |
422 | fprintf_ln(stderr, _("You asked to pull from the remote '%s', but did not specify\n" | |
423 | "a branch. Because this is not the default configured remote\n" | |
424 | "for your current branch, you must specify a branch on the command line."), | |
425 | repo); | |
426 | } else if (!curr_branch) { | |
427 | fprintf_ln(stderr, _("You are not currently on a branch.")); | |
b7b31471 PT |
428 | if (opt_rebase) |
429 | fprintf_ln(stderr, _("Please specify which branch you want to rebase against.")); | |
430 | else | |
431 | fprintf_ln(stderr, _("Please specify which branch you want to merge with.")); | |
44c175c7 PT |
432 | fprintf_ln(stderr, _("See git-pull(1) for details.")); |
433 | fprintf(stderr, "\n"); | |
8a0de58a | 434 | fprintf_ln(stderr, " git pull %s %s", _("<remote>"), _("<branch>")); |
44c175c7 PT |
435 | fprintf(stderr, "\n"); |
436 | } else if (!curr_branch->merge_nr) { | |
437 | const char *remote_name = NULL; | |
438 | ||
439 | if (for_each_remote(get_only_remote, &remote_name) || !remote_name) | |
8a0de58a | 440 | remote_name = _("<remote>"); |
44c175c7 PT |
441 | |
442 | fprintf_ln(stderr, _("There is no tracking information for the current branch.")); | |
b7b31471 PT |
443 | if (opt_rebase) |
444 | fprintf_ln(stderr, _("Please specify which branch you want to rebase against.")); | |
445 | else | |
446 | fprintf_ln(stderr, _("Please specify which branch you want to merge with.")); | |
44c175c7 PT |
447 | fprintf_ln(stderr, _("See git-pull(1) for details.")); |
448 | fprintf(stderr, "\n"); | |
8a0de58a | 449 | fprintf_ln(stderr, " git pull %s %s", _("<remote>"), _("<branch>")); |
44c175c7 | 450 | fprintf(stderr, "\n"); |
daf9f649 VA |
451 | fprintf_ln(stderr, _("If you wish to set tracking information for this branch you can do so with:")); |
452 | fprintf(stderr, "\n"); | |
453 | fprintf_ln(stderr, " git branch --set-upstream-to=%s/%s %s\n", | |
454 | remote_name, _("<branch>"), curr_branch->name); | |
44c175c7 PT |
455 | } else |
456 | fprintf_ln(stderr, _("Your configuration specifies to merge with the ref '%s'\n" | |
457 | "from the remote, but no such ref was fetched."), | |
458 | *curr_branch->merge_name); | |
459 | exit(1); | |
460 | } | |
461 | ||
f2c5baa1 PT |
462 | /** |
463 | * Parses argv into [<repo> [<refspecs>...]], returning their values in `repo` | |
464 | * as a string and `refspecs` as a null-terminated array of strings. If `repo` | |
465 | * is not provided in argv, it is set to NULL. | |
466 | */ | |
467 | static void parse_repo_refspecs(int argc, const char **argv, const char **repo, | |
468 | const char ***refspecs) | |
469 | { | |
470 | if (argc > 0) { | |
471 | *repo = *argv++; | |
472 | argc--; | |
473 | } else | |
474 | *repo = NULL; | |
475 | *refspecs = argv; | |
476 | } | |
477 | ||
478 | /** | |
479 | * Runs git-fetch, returning its exit status. `repo` and `refspecs` are the | |
480 | * repository and refspecs to fetch, or NULL if they are not provided. | |
481 | */ | |
482 | static int run_fetch(const char *repo, const char **refspecs) | |
483 | { | |
484 | struct argv_array args = ARGV_ARRAY_INIT; | |
485 | int ret; | |
486 | ||
487 | argv_array_pushl(&args, "fetch", "--update-head-ok", NULL); | |
2a747902 PT |
488 | |
489 | /* Shared options */ | |
490 | argv_push_verbosity(&args); | |
491 | if (opt_progress) | |
492 | argv_array_push(&args, opt_progress); | |
493 | ||
a32975f5 PT |
494 | /* Options passed to git-fetch */ |
495 | if (opt_all) | |
496 | argv_array_push(&args, opt_all); | |
497 | if (opt_append) | |
498 | argv_array_push(&args, opt_append); | |
499 | if (opt_upload_pack) | |
500 | argv_array_push(&args, opt_upload_pack); | |
501 | argv_push_force(&args); | |
502 | if (opt_tags) | |
503 | argv_array_push(&args, opt_tags); | |
504 | if (opt_prune) | |
505 | argv_array_push(&args, opt_prune); | |
a6d7eb2c SB |
506 | if (recurse_submodules != RECURSE_SUBMODULES_DEFAULT) |
507 | switch (recurse_submodules) { | |
508 | case RECURSE_SUBMODULES_ON: | |
509 | argv_array_push(&args, "--recurse-submodules=on"); | |
510 | break; | |
511 | case RECURSE_SUBMODULES_OFF: | |
512 | argv_array_push(&args, "--recurse-submodules=no"); | |
513 | break; | |
514 | case RECURSE_SUBMODULES_ON_DEMAND: | |
515 | argv_array_push(&args, "--recurse-submodules=on-demand"); | |
516 | break; | |
517 | default: | |
518 | BUG("submodule recursion option not understood"); | |
519 | } | |
62104ba1 SB |
520 | if (max_children) |
521 | argv_array_push(&args, max_children); | |
a32975f5 PT |
522 | if (opt_dry_run) |
523 | argv_array_push(&args, "--dry-run"); | |
524 | if (opt_keep) | |
525 | argv_array_push(&args, opt_keep); | |
526 | if (opt_depth) | |
527 | argv_array_push(&args, opt_depth); | |
528 | if (opt_unshallow) | |
529 | argv_array_push(&args, opt_unshallow); | |
530 | if (opt_update_shallow) | |
531 | argv_array_push(&args, opt_update_shallow); | |
532 | if (opt_refmap) | |
533 | argv_array_push(&args, opt_refmap); | |
ffb4568a WS |
534 | if (opt_ipv4) |
535 | argv_array_push(&args, opt_ipv4); | |
536 | if (opt_ipv6) | |
537 | argv_array_push(&args, opt_ipv6); | |
a32975f5 | 538 | |
f2c5baa1 PT |
539 | if (repo) { |
540 | argv_array_push(&args, repo); | |
541 | argv_array_pushv(&args, refspecs); | |
542 | } else if (*refspecs) | |
543 | die("BUG: refspecs without repo?"); | |
544 | ret = run_command_v_opt(args.argv, RUN_GIT_CMD); | |
545 | argv_array_clear(&args); | |
546 | return ret; | |
547 | } | |
548 | ||
49ec402d PT |
549 | /** |
550 | * "Pulls into void" by branching off merge_head. | |
551 | */ | |
ee3051bd | 552 | static int pull_into_void(const struct object_id *merge_head, |
f9b11147 | 553 | const struct object_id *curr_head) |
49ec402d PT |
554 | { |
555 | /* | |
556 | * Two-way merge: we treat the index as based on an empty tree, | |
557 | * and try to fast-forward to HEAD. This ensures we will not lose | |
558 | * index/worktree changes that the user already made on the unborn | |
559 | * branch. | |
560 | */ | |
eb0ccfd7 | 561 | if (checkout_fast_forward(the_hash_algo->empty_tree, merge_head, 0)) |
49ec402d PT |
562 | return 1; |
563 | ||
ae077771 | 564 | if (update_ref("initial pull", "HEAD", merge_head, curr_head, 0, UPDATE_REFS_DIE_ON_ERR)) |
49ec402d PT |
565 | return 1; |
566 | ||
567 | return 0; | |
568 | } | |
569 | ||
a6d7eb2c SB |
570 | static int rebase_submodules(void) |
571 | { | |
572 | struct child_process cp = CHILD_PROCESS_INIT; | |
573 | ||
574 | cp.git_cmd = 1; | |
575 | cp.no_stdin = 1; | |
576 | argv_array_pushl(&cp.args, "submodule", "update", | |
577 | "--recursive", "--rebase", NULL); | |
a56771a6 | 578 | argv_push_verbosity(&cp.args); |
a6d7eb2c SB |
579 | |
580 | return run_command(&cp); | |
581 | } | |
582 | ||
583 | static int update_submodules(void) | |
584 | { | |
585 | struct child_process cp = CHILD_PROCESS_INIT; | |
586 | ||
587 | cp.git_cmd = 1; | |
588 | cp.no_stdin = 1; | |
589 | argv_array_pushl(&cp.args, "submodule", "update", | |
590 | "--recursive", "--checkout", NULL); | |
a56771a6 | 591 | argv_push_verbosity(&cp.args); |
a6d7eb2c SB |
592 | |
593 | return run_command(&cp); | |
594 | } | |
595 | ||
f2c5baa1 PT |
596 | /** |
597 | * Runs git-merge, returning its exit status. | |
598 | */ | |
599 | static int run_merge(void) | |
600 | { | |
601 | int ret; | |
602 | struct argv_array args = ARGV_ARRAY_INIT; | |
603 | ||
604 | argv_array_pushl(&args, "merge", NULL); | |
2a747902 PT |
605 | |
606 | /* Shared options */ | |
607 | argv_push_verbosity(&args); | |
608 | if (opt_progress) | |
609 | argv_array_push(&args, opt_progress); | |
610 | ||
11b6d178 PT |
611 | /* Options passed to git-merge */ |
612 | if (opt_diffstat) | |
613 | argv_array_push(&args, opt_diffstat); | |
614 | if (opt_log) | |
615 | argv_array_push(&args, opt_log); | |
3a4d2c74 TK |
616 | if (opt_signoff) |
617 | argv_array_push(&args, opt_signoff); | |
11b6d178 PT |
618 | if (opt_squash) |
619 | argv_array_push(&args, opt_squash); | |
620 | if (opt_commit) | |
621 | argv_array_push(&args, opt_commit); | |
622 | if (opt_edit) | |
623 | argv_array_push(&args, opt_edit); | |
624 | if (opt_ff) | |
625 | argv_array_push(&args, opt_ff); | |
626 | if (opt_verify_signatures) | |
627 | argv_array_push(&args, opt_verify_signatures); | |
628 | argv_array_pushv(&args, opt_strategies.argv); | |
629 | argv_array_pushv(&args, opt_strategy_opts.argv); | |
630 | if (opt_gpg_sign) | |
631 | argv_array_push(&args, opt_gpg_sign); | |
09c2cb87 JH |
632 | if (opt_allow_unrelated_histories > 0) |
633 | argv_array_push(&args, "--allow-unrelated-histories"); | |
11b6d178 | 634 | |
f2c5baa1 PT |
635 | argv_array_push(&args, "FETCH_HEAD"); |
636 | ret = run_command_v_opt(args.argv, RUN_GIT_CMD); | |
637 | argv_array_clear(&args); | |
638 | return ret; | |
639 | } | |
640 | ||
1678b81e PT |
641 | /** |
642 | * Returns remote's upstream branch for the current branch. If remote is NULL, | |
643 | * the current branch's configured default remote is used. Returns NULL if | |
644 | * `remote` does not name a valid remote, HEAD does not point to a branch, | |
645 | * remote is not the branch's configured remote or the branch does not have any | |
646 | * configured upstream branch. | |
647 | */ | |
648 | static const char *get_upstream_branch(const char *remote) | |
649 | { | |
650 | struct remote *rm; | |
651 | struct branch *curr_branch; | |
652 | const char *curr_branch_remote; | |
653 | ||
654 | rm = remote_get(remote); | |
655 | if (!rm) | |
656 | return NULL; | |
657 | ||
658 | curr_branch = branch_get("HEAD"); | |
659 | if (!curr_branch) | |
660 | return NULL; | |
661 | ||
662 | curr_branch_remote = remote_for_branch(curr_branch, NULL); | |
663 | assert(curr_branch_remote); | |
664 | ||
665 | if (strcmp(curr_branch_remote, rm->name)) | |
666 | return NULL; | |
667 | ||
668 | return branch_get_upstream(curr_branch, NULL); | |
669 | } | |
670 | ||
671 | /** | |
672 | * Derives the remote tracking branch from the remote and refspec. | |
673 | * | |
674 | * FIXME: The current implementation assumes the default mapping of | |
675 | * refs/heads/<branch_name> to refs/remotes/<remote_name>/<branch_name>. | |
676 | */ | |
677 | static const char *get_tracking_branch(const char *remote, const char *refspec) | |
678 | { | |
895d3912 | 679 | struct refspec_item spec; |
1678b81e PT |
680 | const char *spec_src; |
681 | const char *merge_branch; | |
682 | ||
dc064221 | 683 | refspec_item_init_or_die(&spec, refspec, REFSPEC_FETCH); |
895d3912 | 684 | spec_src = spec.src; |
1678b81e PT |
685 | if (!*spec_src || !strcmp(spec_src, "HEAD")) |
686 | spec_src = "HEAD"; | |
687 | else if (skip_prefix(spec_src, "heads/", &spec_src)) | |
688 | ; | |
689 | else if (skip_prefix(spec_src, "refs/heads/", &spec_src)) | |
690 | ; | |
691 | else if (starts_with(spec_src, "refs/") || | |
692 | starts_with(spec_src, "tags/") || | |
693 | starts_with(spec_src, "remotes/")) | |
694 | spec_src = ""; | |
695 | ||
696 | if (*spec_src) { | |
697 | if (!strcmp(remote, ".")) | |
698 | merge_branch = mkpath("refs/heads/%s", spec_src); | |
699 | else | |
700 | merge_branch = mkpath("refs/remotes/%s/%s", remote, spec_src); | |
701 | } else | |
702 | merge_branch = NULL; | |
703 | ||
895d3912 | 704 | refspec_item_clear(&spec); |
1678b81e PT |
705 | return merge_branch; |
706 | } | |
707 | ||
708 | /** | |
709 | * Given the repo and refspecs, sets fork_point to the point at which the | |
710 | * current branch forked from its remote tracking branch. Returns 0 on success, | |
711 | * -1 on failure. | |
712 | */ | |
f9b11147 | 713 | static int get_rebase_fork_point(struct object_id *fork_point, const char *repo, |
1678b81e PT |
714 | const char *refspec) |
715 | { | |
716 | int ret; | |
717 | struct branch *curr_branch; | |
718 | const char *remote_branch; | |
719 | struct child_process cp = CHILD_PROCESS_INIT; | |
720 | struct strbuf sb = STRBUF_INIT; | |
721 | ||
722 | curr_branch = branch_get("HEAD"); | |
723 | if (!curr_branch) | |
724 | return -1; | |
725 | ||
726 | if (refspec) | |
727 | remote_branch = get_tracking_branch(repo, refspec); | |
728 | else | |
729 | remote_branch = get_upstream_branch(repo); | |
730 | ||
731 | if (!remote_branch) | |
732 | return -1; | |
733 | ||
734 | argv_array_pushl(&cp.args, "merge-base", "--fork-point", | |
735 | remote_branch, curr_branch->name, NULL); | |
736 | cp.no_stdin = 1; | |
737 | cp.no_stderr = 1; | |
738 | cp.git_cmd = 1; | |
739 | ||
740 | ret = capture_command(&cp, &sb, GIT_SHA1_HEXSZ); | |
741 | if (ret) | |
742 | goto cleanup; | |
743 | ||
f9b11147 | 744 | ret = get_oid_hex(sb.buf, fork_point); |
1678b81e PT |
745 | if (ret) |
746 | goto cleanup; | |
747 | ||
748 | cleanup: | |
749 | strbuf_release(&sb); | |
750 | return ret ? -1 : 0; | |
751 | } | |
752 | ||
753 | /** | |
754 | * Sets merge_base to the octopus merge base of curr_head, merge_head and | |
755 | * fork_point. Returns 0 if a merge base is found, 1 otherwise. | |
756 | */ | |
f9b11147 | 757 | static int get_octopus_merge_base(struct object_id *merge_base, |
758 | const struct object_id *curr_head, | |
ee3051bd | 759 | const struct object_id *merge_head, |
f9b11147 | 760 | const struct object_id *fork_point) |
1678b81e PT |
761 | { |
762 | struct commit_list *revs = NULL, *result; | |
763 | ||
bc83266a | 764 | commit_list_insert(lookup_commit_reference(curr_head), &revs); |
765 | commit_list_insert(lookup_commit_reference(merge_head), &revs); | |
f9b11147 | 766 | if (!is_null_oid(fork_point)) |
bc83266a | 767 | commit_list_insert(lookup_commit_reference(fork_point), &revs); |
1678b81e | 768 | |
4da72644 | 769 | result = get_octopus_merge_bases(revs); |
1678b81e | 770 | free_commit_list(revs); |
4da72644 MÅ |
771 | reduce_heads_replace(&result); |
772 | ||
1678b81e PT |
773 | if (!result) |
774 | return 1; | |
775 | ||
f9b11147 | 776 | oidcpy(merge_base, &result->item->object.oid); |
4da72644 | 777 | free_commit_list(result); |
1678b81e PT |
778 | return 0; |
779 | } | |
780 | ||
781 | /** | |
782 | * Given the current HEAD SHA1, the merge head returned from git-fetch and the | |
783 | * fork point calculated by get_rebase_fork_point(), runs git-rebase with the | |
784 | * appropriate arguments and returns its exit status. | |
785 | */ | |
f9b11147 | 786 | static int run_rebase(const struct object_id *curr_head, |
ee3051bd | 787 | const struct object_id *merge_head, |
f9b11147 | 788 | const struct object_id *fork_point) |
1678b81e PT |
789 | { |
790 | int ret; | |
f9b11147 | 791 | struct object_id oct_merge_base; |
1678b81e PT |
792 | struct argv_array args = ARGV_ARRAY_INIT; |
793 | ||
f9b11147 | 794 | if (!get_octopus_merge_base(&oct_merge_base, curr_head, merge_head, fork_point)) |
795 | if (!is_null_oid(fork_point) && !oidcmp(&oct_merge_base, fork_point)) | |
1678b81e PT |
796 | fork_point = NULL; |
797 | ||
798 | argv_array_push(&args, "rebase"); | |
799 | ||
800 | /* Shared options */ | |
801 | argv_push_verbosity(&args); | |
802 | ||
803 | /* Options passed to git-rebase */ | |
804 | if (opt_rebase == REBASE_PRESERVE) | |
805 | argv_array_push(&args, "--preserve-merges"); | |
f5eb87b9 JS |
806 | else if (opt_rebase == REBASE_INTERACTIVE) |
807 | argv_array_push(&args, "--interactive"); | |
1678b81e PT |
808 | if (opt_diffstat) |
809 | argv_array_push(&args, opt_diffstat); | |
810 | argv_array_pushv(&args, opt_strategies.argv); | |
811 | argv_array_pushv(&args, opt_strategy_opts.argv); | |
812 | if (opt_gpg_sign) | |
813 | argv_array_push(&args, opt_gpg_sign); | |
f66398eb MJ |
814 | if (opt_autostash == 0) |
815 | argv_array_push(&args, "--no-autostash"); | |
816 | else if (opt_autostash == 1) | |
817 | argv_array_push(&args, "--autostash"); | |
c57e501c AH |
818 | if (opt_verify_signatures && |
819 | !strcmp(opt_verify_signatures, "--verify-signatures")) | |
820 | warning(_("ignoring --verify-signatures for rebase")); | |
1678b81e PT |
821 | |
822 | argv_array_push(&args, "--onto"); | |
ee3051bd | 823 | argv_array_push(&args, oid_to_hex(merge_head)); |
1678b81e | 824 | |
f9b11147 | 825 | if (fork_point && !is_null_oid(fork_point)) |
826 | argv_array_push(&args, oid_to_hex(fork_point)); | |
1678b81e | 827 | else |
ee3051bd | 828 | argv_array_push(&args, oid_to_hex(merge_head)); |
1678b81e PT |
829 | |
830 | ret = run_command_v_opt(args.argv, RUN_GIT_CMD); | |
831 | argv_array_clear(&args); | |
832 | return ret; | |
833 | } | |
834 | ||
1e1ea69f PT |
835 | int cmd_pull(int argc, const char **argv, const char *prefix) |
836 | { | |
f2c5baa1 | 837 | const char *repo, **refspecs; |
910650d2 | 838 | struct oid_array merge_heads = OID_ARRAY_INIT; |
f9b11147 | 839 | struct object_id orig_head, curr_head; |
840 | struct object_id rebase_fork_point; | |
f15e7cf5 | 841 | int autostash; |
f2c5baa1 | 842 | |
41fca098 PT |
843 | if (!getenv("GIT_REFLOG_ACTION")) |
844 | set_reflog_message(argc, argv); | |
845 | ||
cad0c692 NMC |
846 | git_config(git_pull_config, NULL); |
847 | ||
1e1ea69f PT |
848 | argc = parse_options(argc, argv, prefix, pull_options, pull_usage, 0); |
849 | ||
f2c5baa1 PT |
850 | parse_repo_refspecs(argc, argv, &repo, &refspecs); |
851 | ||
a9de9897 PT |
852 | if (!opt_ff) |
853 | opt_ff = xstrdup_or_null(config_get_ff()); | |
854 | ||
81dbd768 PT |
855 | if (opt_rebase < 0) |
856 | opt_rebase = config_get_rebase(); | |
857 | ||
4a4cf9e8 | 858 | if (read_cache_unmerged()) |
8785c425 | 859 | die_resolve_conflict("pull"); |
4a4cf9e8 | 860 | |
ca03e067 | 861 | if (file_exists(git_path_merge_head())) |
4a4cf9e8 PT |
862 | die_conclude_merge(); |
863 | ||
f9b11147 | 864 | if (get_oid("HEAD", &orig_head)) |
865 | oidclr(&orig_head); | |
fe911b8c | 866 | |
f66398eb MJ |
867 | if (!opt_rebase && opt_autostash != -1) |
868 | die(_("--[no-]autostash option is only valid with --rebase.")); | |
869 | ||
f15e7cf5 | 870 | autostash = config_autostash; |
8944969c | 871 | if (opt_rebase) { |
f66398eb MJ |
872 | if (opt_autostash != -1) |
873 | autostash = opt_autostash; | |
53c76dc0 | 874 | |
f9b11147 | 875 | if (is_null_oid(&orig_head) && !is_cache_unborn()) |
8944969c PT |
876 | die(_("Updating an unborn branch with changes added to the index.")); |
877 | ||
53c76dc0 | 878 | if (!autostash) |
ea63b393 | 879 | require_clean_work_tree(N_("pull with rebase"), |
d8cc92ab | 880 | _("please commit or stash them."), 1, 0); |
8944969c | 881 | |
f9b11147 | 882 | if (get_rebase_fork_point(&rebase_fork_point, repo, *refspecs)) |
883 | oidclr(&rebase_fork_point); | |
8944969c | 884 | } |
1678b81e | 885 | |
f2c5baa1 PT |
886 | if (run_fetch(repo, refspecs)) |
887 | return 1; | |
888 | ||
a32975f5 PT |
889 | if (opt_dry_run) |
890 | return 0; | |
891 | ||
f9b11147 | 892 | if (get_oid("HEAD", &curr_head)) |
893 | oidclr(&curr_head); | |
fe911b8c | 894 | |
f9b11147 | 895 | if (!is_null_oid(&orig_head) && !is_null_oid(&curr_head) && |
896 | oidcmp(&orig_head, &curr_head)) { | |
fe911b8c PT |
897 | /* |
898 | * The fetch involved updating the current branch. | |
899 | * | |
900 | * The working tree and the index file are still based on | |
901 | * orig_head commit, but we are merging into curr_head. | |
902 | * Update the working tree to match curr_head. | |
903 | */ | |
904 | ||
905 | warning(_("fetch updated the current branch head.\n" | |
906 | "fast-forwarding your working tree from\n" | |
f9b11147 | 907 | "commit %s."), oid_to_hex(&orig_head)); |
fe911b8c | 908 | |
f06e90da | 909 | if (checkout_fast_forward(&orig_head, &curr_head, 0)) |
fe911b8c PT |
910 | die(_("Cannot fast-forward your working tree.\n" |
911 | "After making sure that you saved anything precious from\n" | |
912 | "$ git diff %s\n" | |
913 | "output, run\n" | |
914 | "$ git reset --hard\n" | |
f9b11147 | 915 | "to recover."), oid_to_hex(&orig_head)); |
fe911b8c PT |
916 | } |
917 | ||
44c175c7 PT |
918 | get_merge_heads(&merge_heads); |
919 | ||
920 | if (!merge_heads.nr) | |
921 | die_no_merge_candidates(repo, refspecs); | |
922 | ||
f9b11147 | 923 | if (is_null_oid(&orig_head)) { |
49ec402d PT |
924 | if (merge_heads.nr > 1) |
925 | die(_("Cannot merge multiple branches into empty head.")); | |
ee3051bd | 926 | return pull_into_void(merge_heads.oid, &curr_head); |
33b842a1 JH |
927 | } |
928 | if (opt_rebase && merge_heads.nr > 1) | |
929 | die(_("Cannot rebase onto multiple branches.")); | |
930 | ||
931 | if (opt_rebase) { | |
a6d7eb2c SB |
932 | int ret = 0; |
933 | if ((recurse_submodules == RECURSE_SUBMODULES_ON || | |
934 | recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND) && | |
935 | submodule_touches_in_range(&rebase_fork_point, &curr_head)) | |
936 | die(_("cannot rebase with locally recorded submodule modifications")); | |
f15e7cf5 TB |
937 | if (!autostash) { |
938 | struct commit_list *list = NULL; | |
939 | struct commit *merge_head, *head; | |
940 | ||
35898eaf | 941 | head = lookup_commit_reference(&orig_head); |
f15e7cf5 | 942 | commit_list_insert(head, &list); |
35898eaf | 943 | merge_head = lookup_commit_reference(&merge_heads.oid[0]); |
f15e7cf5 TB |
944 | if (is_descendant_of(merge_head, list)) { |
945 | /* we can fast-forward this without invoking rebase */ | |
946 | opt_ff = "--ff-only"; | |
a6d7eb2c | 947 | ret = run_merge(); |
f15e7cf5 | 948 | } |
33b842a1 | 949 | } |
a6d7eb2c SB |
950 | ret = run_rebase(&curr_head, merge_heads.oid, &rebase_fork_point); |
951 | ||
952 | if (!ret && (recurse_submodules == RECURSE_SUBMODULES_ON || | |
953 | recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)) | |
954 | ret = rebase_submodules(); | |
955 | ||
956 | return ret; | |
33b842a1 | 957 | } else { |
a6d7eb2c SB |
958 | int ret = run_merge(); |
959 | if (!ret && (recurse_submodules == RECURSE_SUBMODULES_ON || | |
960 | recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)) | |
961 | ret = update_submodules(); | |
962 | return ret; | |
33b842a1 | 963 | } |
1e1ea69f | 964 | } |