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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 | 30 | REBASE_PRESERVE, |
1131ec98 | 31 | REBASE_MERGES, |
f5eb87b9 | 32 | REBASE_INTERACTIVE |
1678b81e PT |
33 | }; |
34 | ||
35 | /** | |
36 | * Parses the value of --rebase. If value is a false value, returns | |
37 | * REBASE_FALSE. If value is a true value, returns REBASE_TRUE. If value is | |
1131ec98 JS |
38 | * "merges", returns REBASE_MERGES. If value is "preserve", returns |
39 | * REBASE_PRESERVE. If value is a invalid value, dies with a fatal error if | |
40 | * fatal is true, otherwise returns REBASE_INVALID. | |
1678b81e PT |
41 | */ |
42 | static enum rebase_type parse_config_rebase(const char *key, const char *value, | |
43 | int fatal) | |
44 | { | |
89576613 | 45 | int v = git_parse_maybe_bool(value); |
1678b81e PT |
46 | |
47 | if (!v) | |
48 | return REBASE_FALSE; | |
49 | else if (v > 0) | |
50 | return REBASE_TRUE; | |
51 | else if (!strcmp(value, "preserve")) | |
52 | return REBASE_PRESERVE; | |
1131ec98 JS |
53 | else if (!strcmp(value, "merges")) |
54 | return REBASE_MERGES; | |
f5eb87b9 JS |
55 | else if (!strcmp(value, "interactive")) |
56 | return REBASE_INTERACTIVE; | |
1678b81e PT |
57 | |
58 | if (fatal) | |
59 | die(_("Invalid value for %s: %s"), key, value); | |
60 | else | |
61 | error(_("Invalid value for %s: %s"), key, value); | |
62 | ||
63 | return REBASE_INVALID; | |
64 | } | |
65 | ||
66 | /** | |
67 | * Callback for --rebase, which parses arg with parse_config_rebase(). | |
68 | */ | |
69 | static int parse_opt_rebase(const struct option *opt, const char *arg, int unset) | |
70 | { | |
71 | enum rebase_type *value = opt->value; | |
72 | ||
73 | if (arg) | |
74 | *value = parse_config_rebase("--rebase", arg, 0); | |
75 | else | |
76 | *value = unset ? REBASE_FALSE : REBASE_TRUE; | |
77 | return *value == REBASE_INVALID ? -1 : 0; | |
78 | } | |
79 | ||
1e1ea69f | 80 | static const char * const pull_usage[] = { |
e7a7401f | 81 | N_("git pull [<options>] [<repository> [<refspec>...]]"), |
1e1ea69f PT |
82 | NULL |
83 | }; | |
84 | ||
2a747902 PT |
85 | /* Shared options */ |
86 | static int opt_verbosity; | |
87 | static char *opt_progress; | |
a6d7eb2c | 88 | static int recurse_submodules = RECURSE_SUBMODULES_DEFAULT; |
2a747902 | 89 | |
1678b81e | 90 | /* Options passed to git-merge or git-rebase */ |
81dbd768 | 91 | static enum rebase_type opt_rebase = -1; |
11b6d178 PT |
92 | static char *opt_diffstat; |
93 | static char *opt_log; | |
3a4d2c74 | 94 | static char *opt_signoff; |
11b6d178 PT |
95 | static char *opt_squash; |
96 | static char *opt_commit; | |
97 | static char *opt_edit; | |
98 | static char *opt_ff; | |
99 | static char *opt_verify_signatures; | |
f66398eb | 100 | static int opt_autostash = -1; |
c48d73bd | 101 | static int config_autostash; |
11b6d178 PT |
102 | static struct argv_array opt_strategies = ARGV_ARRAY_INIT; |
103 | static struct argv_array opt_strategy_opts = ARGV_ARRAY_INIT; | |
104 | static char *opt_gpg_sign; | |
09c2cb87 | 105 | static int opt_allow_unrelated_histories; |
11b6d178 | 106 | |
a32975f5 PT |
107 | /* Options passed to git-fetch */ |
108 | static char *opt_all; | |
109 | static char *opt_append; | |
110 | static char *opt_upload_pack; | |
111 | static int opt_force; | |
112 | static char *opt_tags; | |
113 | static char *opt_prune; | |
62104ba1 | 114 | static char *max_children; |
a32975f5 PT |
115 | static int opt_dry_run; |
116 | static char *opt_keep; | |
117 | static char *opt_depth; | |
118 | static char *opt_unshallow; | |
119 | static char *opt_update_shallow; | |
120 | static char *opt_refmap; | |
ffb4568a WS |
121 | static char *opt_ipv4; |
122 | static char *opt_ipv6; | |
a32975f5 | 123 | |
1e1ea69f | 124 | static struct option pull_options[] = { |
2a747902 PT |
125 | /* Shared options */ |
126 | OPT__VERBOSITY(&opt_verbosity), | |
127 | OPT_PASSTHRU(0, "progress", &opt_progress, NULL, | |
128 | N_("force progress reporting"), | |
129 | PARSE_OPT_NOARG), | |
a6d7eb2c SB |
130 | { OPTION_CALLBACK, 0, "recurse-submodules", |
131 | &recurse_submodules, N_("on-demand"), | |
132 | N_("control for recursive fetching of submodules"), | |
133 | PARSE_OPT_OPTARG, option_fetch_parse_recurse_submodules }, | |
2a747902 | 134 | |
1678b81e | 135 | /* Options passed to git-merge or git-rebase */ |
11b6d178 | 136 | OPT_GROUP(N_("Options related to merging")), |
1678b81e | 137 | { OPTION_CALLBACK, 'r', "rebase", &opt_rebase, |
1131ec98 | 138 | "false|true|merges|preserve|interactive", |
1678b81e PT |
139 | N_("incorporate changes by rebasing rather than merging"), |
140 | PARSE_OPT_OPTARG, parse_opt_rebase }, | |
11b6d178 PT |
141 | OPT_PASSTHRU('n', NULL, &opt_diffstat, NULL, |
142 | N_("do not show a diffstat at the end of the merge"), | |
143 | PARSE_OPT_NOARG | PARSE_OPT_NONEG), | |
144 | OPT_PASSTHRU(0, "stat", &opt_diffstat, NULL, | |
145 | N_("show a diffstat at the end of the merge"), | |
146 | PARSE_OPT_NOARG), | |
147 | OPT_PASSTHRU(0, "summary", &opt_diffstat, NULL, | |
148 | N_("(synonym to --stat)"), | |
149 | PARSE_OPT_NOARG | PARSE_OPT_HIDDEN), | |
150 | OPT_PASSTHRU(0, "log", &opt_log, N_("n"), | |
151 | N_("add (at most <n>) entries from shortlog to merge commit message"), | |
152 | PARSE_OPT_OPTARG), | |
3a4d2c74 TK |
153 | OPT_PASSTHRU(0, "signoff", &opt_signoff, NULL, |
154 | N_("add Signed-off-by:"), | |
155 | PARSE_OPT_OPTARG), | |
11b6d178 PT |
156 | OPT_PASSTHRU(0, "squash", &opt_squash, NULL, |
157 | N_("create a single commit instead of doing a merge"), | |
158 | PARSE_OPT_NOARG), | |
159 | OPT_PASSTHRU(0, "commit", &opt_commit, NULL, | |
160 | N_("perform a commit if the merge succeeds (default)"), | |
161 | PARSE_OPT_NOARG), | |
162 | OPT_PASSTHRU(0, "edit", &opt_edit, NULL, | |
163 | N_("edit message before committing"), | |
164 | PARSE_OPT_NOARG), | |
165 | OPT_PASSTHRU(0, "ff", &opt_ff, NULL, | |
166 | N_("allow fast-forward"), | |
167 | PARSE_OPT_NOARG), | |
168 | OPT_PASSTHRU(0, "ff-only", &opt_ff, NULL, | |
169 | N_("abort if fast-forward is not possible"), | |
170 | PARSE_OPT_NOARG | PARSE_OPT_NONEG), | |
171 | OPT_PASSTHRU(0, "verify-signatures", &opt_verify_signatures, NULL, | |
172 | N_("verify that the named commit has a valid GPG signature"), | |
173 | PARSE_OPT_NOARG), | |
f66398eb MJ |
174 | OPT_BOOL(0, "autostash", &opt_autostash, |
175 | N_("automatically stash/stash pop before and after rebase")), | |
11b6d178 PT |
176 | OPT_PASSTHRU_ARGV('s', "strategy", &opt_strategies, N_("strategy"), |
177 | N_("merge strategy to use"), | |
178 | 0), | |
179 | OPT_PASSTHRU_ARGV('X', "strategy-option", &opt_strategy_opts, | |
180 | N_("option=value"), | |
181 | N_("option for selected merge strategy"), | |
182 | 0), | |
183 | OPT_PASSTHRU('S', "gpg-sign", &opt_gpg_sign, N_("key-id"), | |
184 | N_("GPG sign commit"), | |
185 | PARSE_OPT_OPTARG), | |
09c2cb87 JH |
186 | OPT_SET_INT(0, "allow-unrelated-histories", |
187 | &opt_allow_unrelated_histories, | |
188 | N_("allow merging unrelated histories"), 1), | |
11b6d178 | 189 | |
a32975f5 PT |
190 | /* Options passed to git-fetch */ |
191 | OPT_GROUP(N_("Options related to fetching")), | |
192 | OPT_PASSTHRU(0, "all", &opt_all, NULL, | |
193 | N_("fetch from all remotes"), | |
194 | PARSE_OPT_NOARG), | |
195 | OPT_PASSTHRU('a', "append", &opt_append, NULL, | |
196 | N_("append to .git/FETCH_HEAD instead of overwriting"), | |
197 | PARSE_OPT_NOARG), | |
198 | OPT_PASSTHRU(0, "upload-pack", &opt_upload_pack, N_("path"), | |
199 | N_("path to upload pack on remote end"), | |
200 | 0), | |
1224781d | 201 | OPT__FORCE(&opt_force, N_("force overwrite of local branch"), 0), |
a32975f5 PT |
202 | OPT_PASSTHRU('t', "tags", &opt_tags, NULL, |
203 | N_("fetch all tags and associated objects"), | |
204 | PARSE_OPT_NOARG), | |
205 | OPT_PASSTHRU('p', "prune", &opt_prune, NULL, | |
206 | N_("prune remote-tracking branches no longer on remote"), | |
207 | PARSE_OPT_NOARG), | |
62104ba1 SB |
208 | OPT_PASSTHRU('j', "jobs", &max_children, N_("n"), |
209 | N_("number of submodules pulled in parallel"), | |
210 | PARSE_OPT_OPTARG), | |
a32975f5 PT |
211 | OPT_BOOL(0, "dry-run", &opt_dry_run, |
212 | N_("dry run")), | |
213 | OPT_PASSTHRU('k', "keep", &opt_keep, NULL, | |
214 | N_("keep downloaded pack"), | |
215 | PARSE_OPT_NOARG), | |
216 | OPT_PASSTHRU(0, "depth", &opt_depth, N_("depth"), | |
217 | N_("deepen history of shallow clone"), | |
218 | 0), | |
219 | OPT_PASSTHRU(0, "unshallow", &opt_unshallow, NULL, | |
220 | N_("convert to a complete repository"), | |
221 | PARSE_OPT_NONEG | PARSE_OPT_NOARG), | |
222 | OPT_PASSTHRU(0, "update-shallow", &opt_update_shallow, NULL, | |
223 | N_("accept refs that update .git/shallow"), | |
224 | PARSE_OPT_NOARG), | |
225 | OPT_PASSTHRU(0, "refmap", &opt_refmap, N_("refmap"), | |
226 | N_("specify fetch refmap"), | |
227 | PARSE_OPT_NONEG), | |
ffb4568a WS |
228 | OPT_PASSTHRU('4', "ipv4", &opt_ipv4, NULL, |
229 | N_("use IPv4 addresses only"), | |
230 | PARSE_OPT_NOARG), | |
231 | OPT_PASSTHRU('6', "ipv6", &opt_ipv6, NULL, | |
232 | N_("use IPv6 addresses only"), | |
233 | PARSE_OPT_NOARG), | |
a32975f5 | 234 | |
1e1ea69f PT |
235 | OPT_END() |
236 | }; | |
237 | ||
2a747902 PT |
238 | /** |
239 | * Pushes "-q" or "-v" switches into arr to match the opt_verbosity level. | |
240 | */ | |
241 | static void argv_push_verbosity(struct argv_array *arr) | |
242 | { | |
243 | int verbosity; | |
244 | ||
245 | for (verbosity = opt_verbosity; verbosity > 0; verbosity--) | |
246 | argv_array_push(arr, "-v"); | |
247 | ||
248 | for (verbosity = opt_verbosity; verbosity < 0; verbosity++) | |
249 | argv_array_push(arr, "-q"); | |
250 | } | |
251 | ||
a32975f5 PT |
252 | /** |
253 | * Pushes "-f" switches into arr to match the opt_force level. | |
254 | */ | |
255 | static void argv_push_force(struct argv_array *arr) | |
256 | { | |
257 | int force = opt_force; | |
258 | while (force-- > 0) | |
259 | argv_array_push(arr, "-f"); | |
260 | } | |
261 | ||
41fca098 PT |
262 | /** |
263 | * Sets the GIT_REFLOG_ACTION environment variable to the concatenation of argv | |
264 | */ | |
265 | static void set_reflog_message(int argc, const char **argv) | |
266 | { | |
267 | int i; | |
268 | struct strbuf msg = STRBUF_INIT; | |
269 | ||
270 | for (i = 0; i < argc; i++) { | |
271 | if (i) | |
272 | strbuf_addch(&msg, ' '); | |
273 | strbuf_addstr(&msg, argv[i]); | |
274 | } | |
275 | ||
276 | setenv("GIT_REFLOG_ACTION", msg.buf, 0); | |
277 | ||
278 | strbuf_release(&msg); | |
279 | } | |
280 | ||
a9de9897 PT |
281 | /** |
282 | * If pull.ff is unset, returns NULL. If pull.ff is "true", returns "--ff". If | |
283 | * pull.ff is "false", returns "--no-ff". If pull.ff is "only", returns | |
284 | * "--ff-only". Otherwise, if pull.ff is set to an invalid value, die with an | |
285 | * error. | |
286 | */ | |
287 | static const char *config_get_ff(void) | |
288 | { | |
289 | const char *value; | |
290 | ||
291 | if (git_config_get_value("pull.ff", &value)) | |
292 | return NULL; | |
293 | ||
89576613 | 294 | switch (git_parse_maybe_bool(value)) { |
a9de9897 PT |
295 | case 0: |
296 | return "--no-ff"; | |
297 | case 1: | |
298 | return "--ff"; | |
299 | } | |
300 | ||
301 | if (!strcmp(value, "only")) | |
302 | return "--ff-only"; | |
303 | ||
304 | die(_("Invalid value for pull.ff: %s"), value); | |
305 | } | |
306 | ||
81dbd768 PT |
307 | /** |
308 | * Returns the default configured value for --rebase. It first looks for the | |
309 | * value of "branch.$curr_branch.rebase", where $curr_branch is the current | |
310 | * branch, and if HEAD is detached or the configuration key does not exist, | |
311 | * looks for the value of "pull.rebase". If both configuration keys do not | |
312 | * exist, returns REBASE_FALSE. | |
313 | */ | |
314 | static enum rebase_type config_get_rebase(void) | |
315 | { | |
316 | struct branch *curr_branch = branch_get("HEAD"); | |
317 | const char *value; | |
318 | ||
319 | if (curr_branch) { | |
320 | char *key = xstrfmt("branch.%s.rebase", curr_branch->name); | |
321 | ||
322 | if (!git_config_get_value(key, &value)) { | |
323 | enum rebase_type ret = parse_config_rebase(key, value, 1); | |
324 | free(key); | |
325 | return ret; | |
326 | } | |
327 | ||
328 | free(key); | |
329 | } | |
330 | ||
331 | if (!git_config_get_value("pull.rebase", &value)) | |
332 | return parse_config_rebase("pull.rebase", value, 1); | |
333 | ||
334 | return REBASE_FALSE; | |
335 | } | |
336 | ||
c48d73bd MJ |
337 | /** |
338 | * Read config variables. | |
339 | */ | |
340 | static int git_pull_config(const char *var, const char *value, void *cb) | |
341 | { | |
342 | if (!strcmp(var, "rebase.autostash")) { | |
343 | config_autostash = git_config_bool(var, value); | |
344 | return 0; | |
121e43fa NMC |
345 | } else if (!strcmp(var, "submodule.recurse")) { |
346 | recurse_submodules = git_config_bool(var, value) ? | |
347 | RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF; | |
348 | return 0; | |
c48d73bd MJ |
349 | } |
350 | return git_default_config(var, value, cb); | |
351 | } | |
352 | ||
44c175c7 PT |
353 | /** |
354 | * Appends merge candidates from FETCH_HEAD that are not marked not-for-merge | |
355 | * into merge_heads. | |
356 | */ | |
910650d2 | 357 | static void get_merge_heads(struct oid_array *merge_heads) |
44c175c7 | 358 | { |
102de880 | 359 | const char *filename = git_path_fetch_head(the_repository); |
44c175c7 PT |
360 | FILE *fp; |
361 | struct strbuf sb = STRBUF_INIT; | |
14bb40b3 | 362 | struct object_id oid; |
44c175c7 | 363 | |
23a9e071 | 364 | fp = xfopen(filename, "r"); |
8f309aeb | 365 | while (strbuf_getline_lf(&sb, fp) != EOF) { |
14bb40b3 | 366 | if (get_oid_hex(sb.buf, &oid)) |
44c175c7 PT |
367 | continue; /* invalid line: does not start with SHA1 */ |
368 | if (starts_with(sb.buf + GIT_SHA1_HEXSZ, "\tnot-for-merge\t")) | |
369 | continue; /* ref is not-for-merge */ | |
910650d2 | 370 | oid_array_append(merge_heads, &oid); |
44c175c7 PT |
371 | } |
372 | fclose(fp); | |
373 | strbuf_release(&sb); | |
374 | } | |
375 | ||
376 | /** | |
377 | * Used by die_no_merge_candidates() as a for_each_remote() callback to | |
378 | * retrieve the name of the remote if the repository only has one remote. | |
379 | */ | |
380 | static int get_only_remote(struct remote *remote, void *cb_data) | |
381 | { | |
382 | const char **remote_name = cb_data; | |
383 | ||
384 | if (*remote_name) | |
385 | return -1; | |
386 | ||
387 | *remote_name = remote->name; | |
388 | return 0; | |
389 | } | |
390 | ||
391 | /** | |
392 | * Dies with the appropriate reason for why there are no merge candidates: | |
393 | * | |
394 | * 1. We fetched from a specific remote, and a refspec was given, but it ended | |
395 | * up not fetching anything. This is usually because the user provided a | |
396 | * wildcard refspec which had no matches on the remote end. | |
397 | * | |
398 | * 2. We fetched from a non-default remote, but didn't specify a branch to | |
399 | * merge. We can't use the configured one because it applies to the default | |
400 | * remote, thus the user must specify the branches to merge. | |
401 | * | |
402 | * 3. We fetched from the branch's or repo's default remote, but: | |
403 | * | |
404 | * a. We are not on a branch, so there will never be a configured branch to | |
405 | * merge with. | |
406 | * | |
407 | * b. We are on a branch, but there is no configured branch to merge with. | |
408 | * | |
409 | * 4. We fetched from the branch's or repo's default remote, but the configured | |
410 | * branch to merge didn't get fetched. (Either it doesn't exist, or wasn't | |
411 | * part of the configured fetch refspec.) | |
412 | */ | |
413 | static void NORETURN die_no_merge_candidates(const char *repo, const char **refspecs) | |
414 | { | |
415 | struct branch *curr_branch = branch_get("HEAD"); | |
416 | const char *remote = curr_branch ? curr_branch->remote_name : NULL; | |
417 | ||
418 | if (*refspecs) { | |
b7b31471 PT |
419 | if (opt_rebase) |
420 | fprintf_ln(stderr, _("There is no candidate for rebasing against among the refs that you just fetched.")); | |
421 | else | |
422 | fprintf_ln(stderr, _("There are no candidates for merging among the refs that you just fetched.")); | |
44c175c7 PT |
423 | fprintf_ln(stderr, _("Generally this means that you provided a wildcard refspec which had no\n" |
424 | "matches on the remote end.")); | |
425 | } else if (repo && curr_branch && (!remote || strcmp(repo, remote))) { | |
426 | fprintf_ln(stderr, _("You asked to pull from the remote '%s', but did not specify\n" | |
427 | "a branch. Because this is not the default configured remote\n" | |
428 | "for your current branch, you must specify a branch on the command line."), | |
429 | repo); | |
430 | } else if (!curr_branch) { | |
431 | fprintf_ln(stderr, _("You are not currently on a branch.")); | |
b7b31471 PT |
432 | if (opt_rebase) |
433 | fprintf_ln(stderr, _("Please specify which branch you want to rebase against.")); | |
434 | else | |
435 | fprintf_ln(stderr, _("Please specify which branch you want to merge with.")); | |
44c175c7 PT |
436 | fprintf_ln(stderr, _("See git-pull(1) for details.")); |
437 | fprintf(stderr, "\n"); | |
8a0de58a | 438 | fprintf_ln(stderr, " git pull %s %s", _("<remote>"), _("<branch>")); |
44c175c7 PT |
439 | fprintf(stderr, "\n"); |
440 | } else if (!curr_branch->merge_nr) { | |
441 | const char *remote_name = NULL; | |
442 | ||
443 | if (for_each_remote(get_only_remote, &remote_name) || !remote_name) | |
8a0de58a | 444 | remote_name = _("<remote>"); |
44c175c7 PT |
445 | |
446 | fprintf_ln(stderr, _("There is no tracking information for the current branch.")); | |
b7b31471 PT |
447 | if (opt_rebase) |
448 | fprintf_ln(stderr, _("Please specify which branch you want to rebase against.")); | |
449 | else | |
450 | fprintf_ln(stderr, _("Please specify which branch you want to merge with.")); | |
44c175c7 PT |
451 | fprintf_ln(stderr, _("See git-pull(1) for details.")); |
452 | fprintf(stderr, "\n"); | |
8a0de58a | 453 | fprintf_ln(stderr, " git pull %s %s", _("<remote>"), _("<branch>")); |
44c175c7 | 454 | fprintf(stderr, "\n"); |
daf9f649 VA |
455 | fprintf_ln(stderr, _("If you wish to set tracking information for this branch you can do so with:")); |
456 | fprintf(stderr, "\n"); | |
457 | fprintf_ln(stderr, " git branch --set-upstream-to=%s/%s %s\n", | |
458 | remote_name, _("<branch>"), curr_branch->name); | |
44c175c7 PT |
459 | } else |
460 | fprintf_ln(stderr, _("Your configuration specifies to merge with the ref '%s'\n" | |
461 | "from the remote, but no such ref was fetched."), | |
462 | *curr_branch->merge_name); | |
463 | exit(1); | |
464 | } | |
465 | ||
f2c5baa1 PT |
466 | /** |
467 | * Parses argv into [<repo> [<refspecs>...]], returning their values in `repo` | |
468 | * as a string and `refspecs` as a null-terminated array of strings. If `repo` | |
469 | * is not provided in argv, it is set to NULL. | |
470 | */ | |
471 | static void parse_repo_refspecs(int argc, const char **argv, const char **repo, | |
472 | const char ***refspecs) | |
473 | { | |
474 | if (argc > 0) { | |
475 | *repo = *argv++; | |
476 | argc--; | |
477 | } else | |
478 | *repo = NULL; | |
479 | *refspecs = argv; | |
480 | } | |
481 | ||
482 | /** | |
483 | * Runs git-fetch, returning its exit status. `repo` and `refspecs` are the | |
484 | * repository and refspecs to fetch, or NULL if they are not provided. | |
485 | */ | |
486 | static int run_fetch(const char *repo, const char **refspecs) | |
487 | { | |
488 | struct argv_array args = ARGV_ARRAY_INIT; | |
489 | int ret; | |
490 | ||
491 | argv_array_pushl(&args, "fetch", "--update-head-ok", NULL); | |
2a747902 PT |
492 | |
493 | /* Shared options */ | |
494 | argv_push_verbosity(&args); | |
495 | if (opt_progress) | |
496 | argv_array_push(&args, opt_progress); | |
497 | ||
a32975f5 PT |
498 | /* Options passed to git-fetch */ |
499 | if (opt_all) | |
500 | argv_array_push(&args, opt_all); | |
501 | if (opt_append) | |
502 | argv_array_push(&args, opt_append); | |
503 | if (opt_upload_pack) | |
504 | argv_array_push(&args, opt_upload_pack); | |
505 | argv_push_force(&args); | |
506 | if (opt_tags) | |
507 | argv_array_push(&args, opt_tags); | |
508 | if (opt_prune) | |
509 | argv_array_push(&args, opt_prune); | |
a6d7eb2c SB |
510 | if (recurse_submodules != RECURSE_SUBMODULES_DEFAULT) |
511 | switch (recurse_submodules) { | |
512 | case RECURSE_SUBMODULES_ON: | |
513 | argv_array_push(&args, "--recurse-submodules=on"); | |
514 | break; | |
515 | case RECURSE_SUBMODULES_OFF: | |
516 | argv_array_push(&args, "--recurse-submodules=no"); | |
517 | break; | |
518 | case RECURSE_SUBMODULES_ON_DEMAND: | |
519 | argv_array_push(&args, "--recurse-submodules=on-demand"); | |
520 | break; | |
521 | default: | |
522 | BUG("submodule recursion option not understood"); | |
523 | } | |
62104ba1 SB |
524 | if (max_children) |
525 | argv_array_push(&args, max_children); | |
a32975f5 PT |
526 | if (opt_dry_run) |
527 | argv_array_push(&args, "--dry-run"); | |
528 | if (opt_keep) | |
529 | argv_array_push(&args, opt_keep); | |
530 | if (opt_depth) | |
531 | argv_array_push(&args, opt_depth); | |
532 | if (opt_unshallow) | |
533 | argv_array_push(&args, opt_unshallow); | |
534 | if (opt_update_shallow) | |
535 | argv_array_push(&args, opt_update_shallow); | |
536 | if (opt_refmap) | |
537 | argv_array_push(&args, opt_refmap); | |
ffb4568a WS |
538 | if (opt_ipv4) |
539 | argv_array_push(&args, opt_ipv4); | |
540 | if (opt_ipv6) | |
541 | argv_array_push(&args, opt_ipv6); | |
a32975f5 | 542 | |
f2c5baa1 PT |
543 | if (repo) { |
544 | argv_array_push(&args, repo); | |
545 | argv_array_pushv(&args, refspecs); | |
546 | } else if (*refspecs) | |
033abf97 | 547 | BUG("refspecs without repo?"); |
f2c5baa1 PT |
548 | ret = run_command_v_opt(args.argv, RUN_GIT_CMD); |
549 | argv_array_clear(&args); | |
550 | return ret; | |
551 | } | |
552 | ||
49ec402d PT |
553 | /** |
554 | * "Pulls into void" by branching off merge_head. | |
555 | */ | |
ee3051bd | 556 | static int pull_into_void(const struct object_id *merge_head, |
f9b11147 | 557 | const struct object_id *curr_head) |
49ec402d PT |
558 | { |
559 | /* | |
560 | * Two-way merge: we treat the index as based on an empty tree, | |
561 | * and try to fast-forward to HEAD. This ensures we will not lose | |
562 | * index/worktree changes that the user already made on the unborn | |
563 | * branch. | |
564 | */ | |
eb0ccfd7 | 565 | if (checkout_fast_forward(the_hash_algo->empty_tree, merge_head, 0)) |
49ec402d PT |
566 | return 1; |
567 | ||
ae077771 | 568 | if (update_ref("initial pull", "HEAD", merge_head, curr_head, 0, UPDATE_REFS_DIE_ON_ERR)) |
49ec402d PT |
569 | return 1; |
570 | ||
571 | return 0; | |
572 | } | |
573 | ||
a6d7eb2c SB |
574 | static int rebase_submodules(void) |
575 | { | |
576 | struct child_process cp = CHILD_PROCESS_INIT; | |
577 | ||
578 | cp.git_cmd = 1; | |
579 | cp.no_stdin = 1; | |
580 | argv_array_pushl(&cp.args, "submodule", "update", | |
581 | "--recursive", "--rebase", NULL); | |
a56771a6 | 582 | argv_push_verbosity(&cp.args); |
a6d7eb2c SB |
583 | |
584 | return run_command(&cp); | |
585 | } | |
586 | ||
587 | static int update_submodules(void) | |
588 | { | |
589 | struct child_process cp = CHILD_PROCESS_INIT; | |
590 | ||
591 | cp.git_cmd = 1; | |
592 | cp.no_stdin = 1; | |
593 | argv_array_pushl(&cp.args, "submodule", "update", | |
594 | "--recursive", "--checkout", NULL); | |
a56771a6 | 595 | argv_push_verbosity(&cp.args); |
a6d7eb2c SB |
596 | |
597 | return run_command(&cp); | |
598 | } | |
599 | ||
f2c5baa1 PT |
600 | /** |
601 | * Runs git-merge, returning its exit status. | |
602 | */ | |
603 | static int run_merge(void) | |
604 | { | |
605 | int ret; | |
606 | struct argv_array args = ARGV_ARRAY_INIT; | |
607 | ||
608 | argv_array_pushl(&args, "merge", NULL); | |
2a747902 PT |
609 | |
610 | /* Shared options */ | |
611 | argv_push_verbosity(&args); | |
612 | if (opt_progress) | |
613 | argv_array_push(&args, opt_progress); | |
614 | ||
11b6d178 PT |
615 | /* Options passed to git-merge */ |
616 | if (opt_diffstat) | |
617 | argv_array_push(&args, opt_diffstat); | |
618 | if (opt_log) | |
619 | argv_array_push(&args, opt_log); | |
3a4d2c74 TK |
620 | if (opt_signoff) |
621 | argv_array_push(&args, opt_signoff); | |
11b6d178 PT |
622 | if (opt_squash) |
623 | argv_array_push(&args, opt_squash); | |
624 | if (opt_commit) | |
625 | argv_array_push(&args, opt_commit); | |
626 | if (opt_edit) | |
627 | argv_array_push(&args, opt_edit); | |
628 | if (opt_ff) | |
629 | argv_array_push(&args, opt_ff); | |
630 | if (opt_verify_signatures) | |
631 | argv_array_push(&args, opt_verify_signatures); | |
632 | argv_array_pushv(&args, opt_strategies.argv); | |
633 | argv_array_pushv(&args, opt_strategy_opts.argv); | |
634 | if (opt_gpg_sign) | |
635 | argv_array_push(&args, opt_gpg_sign); | |
09c2cb87 JH |
636 | if (opt_allow_unrelated_histories > 0) |
637 | argv_array_push(&args, "--allow-unrelated-histories"); | |
11b6d178 | 638 | |
f2c5baa1 PT |
639 | argv_array_push(&args, "FETCH_HEAD"); |
640 | ret = run_command_v_opt(args.argv, RUN_GIT_CMD); | |
641 | argv_array_clear(&args); | |
642 | return ret; | |
643 | } | |
644 | ||
1678b81e PT |
645 | /** |
646 | * Returns remote's upstream branch for the current branch. If remote is NULL, | |
647 | * the current branch's configured default remote is used. Returns NULL if | |
648 | * `remote` does not name a valid remote, HEAD does not point to a branch, | |
649 | * remote is not the branch's configured remote or the branch does not have any | |
650 | * configured upstream branch. | |
651 | */ | |
652 | static const char *get_upstream_branch(const char *remote) | |
653 | { | |
654 | struct remote *rm; | |
655 | struct branch *curr_branch; | |
656 | const char *curr_branch_remote; | |
657 | ||
658 | rm = remote_get(remote); | |
659 | if (!rm) | |
660 | return NULL; | |
661 | ||
662 | curr_branch = branch_get("HEAD"); | |
663 | if (!curr_branch) | |
664 | return NULL; | |
665 | ||
666 | curr_branch_remote = remote_for_branch(curr_branch, NULL); | |
667 | assert(curr_branch_remote); | |
668 | ||
669 | if (strcmp(curr_branch_remote, rm->name)) | |
670 | return NULL; | |
671 | ||
672 | return branch_get_upstream(curr_branch, NULL); | |
673 | } | |
674 | ||
675 | /** | |
30aa96cd | 676 | * Derives the remote-tracking branch from the remote and refspec. |
1678b81e PT |
677 | * |
678 | * FIXME: The current implementation assumes the default mapping of | |
679 | * refs/heads/<branch_name> to refs/remotes/<remote_name>/<branch_name>. | |
680 | */ | |
681 | static const char *get_tracking_branch(const char *remote, const char *refspec) | |
682 | { | |
895d3912 | 683 | struct refspec_item spec; |
1678b81e PT |
684 | const char *spec_src; |
685 | const char *merge_branch; | |
686 | ||
dc064221 | 687 | refspec_item_init_or_die(&spec, refspec, REFSPEC_FETCH); |
895d3912 | 688 | spec_src = spec.src; |
1678b81e PT |
689 | if (!*spec_src || !strcmp(spec_src, "HEAD")) |
690 | spec_src = "HEAD"; | |
691 | else if (skip_prefix(spec_src, "heads/", &spec_src)) | |
692 | ; | |
693 | else if (skip_prefix(spec_src, "refs/heads/", &spec_src)) | |
694 | ; | |
695 | else if (starts_with(spec_src, "refs/") || | |
696 | starts_with(spec_src, "tags/") || | |
697 | starts_with(spec_src, "remotes/")) | |
698 | spec_src = ""; | |
699 | ||
700 | if (*spec_src) { | |
701 | if (!strcmp(remote, ".")) | |
702 | merge_branch = mkpath("refs/heads/%s", spec_src); | |
703 | else | |
704 | merge_branch = mkpath("refs/remotes/%s/%s", remote, spec_src); | |
705 | } else | |
706 | merge_branch = NULL; | |
707 | ||
895d3912 | 708 | refspec_item_clear(&spec); |
1678b81e PT |
709 | return merge_branch; |
710 | } | |
711 | ||
712 | /** | |
713 | * Given the repo and refspecs, sets fork_point to the point at which the | |
30aa96cd | 714 | * current branch forked from its remote-tracking branch. Returns 0 on success, |
1678b81e PT |
715 | * -1 on failure. |
716 | */ | |
f9b11147 | 717 | static int get_rebase_fork_point(struct object_id *fork_point, const char *repo, |
1678b81e PT |
718 | const char *refspec) |
719 | { | |
720 | int ret; | |
721 | struct branch *curr_branch; | |
722 | const char *remote_branch; | |
723 | struct child_process cp = CHILD_PROCESS_INIT; | |
724 | struct strbuf sb = STRBUF_INIT; | |
725 | ||
726 | curr_branch = branch_get("HEAD"); | |
727 | if (!curr_branch) | |
728 | return -1; | |
729 | ||
730 | if (refspec) | |
731 | remote_branch = get_tracking_branch(repo, refspec); | |
732 | else | |
733 | remote_branch = get_upstream_branch(repo); | |
734 | ||
735 | if (!remote_branch) | |
736 | return -1; | |
737 | ||
738 | argv_array_pushl(&cp.args, "merge-base", "--fork-point", | |
739 | remote_branch, curr_branch->name, NULL); | |
740 | cp.no_stdin = 1; | |
741 | cp.no_stderr = 1; | |
742 | cp.git_cmd = 1; | |
743 | ||
744 | ret = capture_command(&cp, &sb, GIT_SHA1_HEXSZ); | |
745 | if (ret) | |
746 | goto cleanup; | |
747 | ||
f9b11147 | 748 | ret = get_oid_hex(sb.buf, fork_point); |
1678b81e PT |
749 | if (ret) |
750 | goto cleanup; | |
751 | ||
752 | cleanup: | |
753 | strbuf_release(&sb); | |
754 | return ret ? -1 : 0; | |
755 | } | |
756 | ||
757 | /** | |
758 | * Sets merge_base to the octopus merge base of curr_head, merge_head and | |
759 | * fork_point. Returns 0 if a merge base is found, 1 otherwise. | |
760 | */ | |
f9b11147 | 761 | static int get_octopus_merge_base(struct object_id *merge_base, |
762 | const struct object_id *curr_head, | |
ee3051bd | 763 | const struct object_id *merge_head, |
f9b11147 | 764 | const struct object_id *fork_point) |
1678b81e PT |
765 | { |
766 | struct commit_list *revs = NULL, *result; | |
767 | ||
2122f675 SB |
768 | commit_list_insert(lookup_commit_reference(the_repository, curr_head), |
769 | &revs); | |
770 | commit_list_insert(lookup_commit_reference(the_repository, merge_head), | |
771 | &revs); | |
f9b11147 | 772 | if (!is_null_oid(fork_point)) |
2122f675 SB |
773 | commit_list_insert(lookup_commit_reference(the_repository, fork_point), |
774 | &revs); | |
1678b81e | 775 | |
4da72644 | 776 | result = get_octopus_merge_bases(revs); |
1678b81e | 777 | free_commit_list(revs); |
4da72644 MÅ |
778 | reduce_heads_replace(&result); |
779 | ||
1678b81e PT |
780 | if (!result) |
781 | return 1; | |
782 | ||
f9b11147 | 783 | oidcpy(merge_base, &result->item->object.oid); |
4da72644 | 784 | free_commit_list(result); |
1678b81e PT |
785 | return 0; |
786 | } | |
787 | ||
788 | /** | |
789 | * Given the current HEAD SHA1, the merge head returned from git-fetch and the | |
790 | * fork point calculated by get_rebase_fork_point(), runs git-rebase with the | |
791 | * appropriate arguments and returns its exit status. | |
792 | */ | |
f9b11147 | 793 | static int run_rebase(const struct object_id *curr_head, |
ee3051bd | 794 | const struct object_id *merge_head, |
f9b11147 | 795 | const struct object_id *fork_point) |
1678b81e PT |
796 | { |
797 | int ret; | |
f9b11147 | 798 | struct object_id oct_merge_base; |
1678b81e PT |
799 | struct argv_array args = ARGV_ARRAY_INIT; |
800 | ||
f9b11147 | 801 | if (!get_octopus_merge_base(&oct_merge_base, curr_head, merge_head, fork_point)) |
802 | if (!is_null_oid(fork_point) && !oidcmp(&oct_merge_base, fork_point)) | |
1678b81e PT |
803 | fork_point = NULL; |
804 | ||
805 | argv_array_push(&args, "rebase"); | |
806 | ||
807 | /* Shared options */ | |
808 | argv_push_verbosity(&args); | |
809 | ||
810 | /* Options passed to git-rebase */ | |
1131ec98 JS |
811 | if (opt_rebase == REBASE_MERGES) |
812 | argv_array_push(&args, "--rebase-merges"); | |
813 | else if (opt_rebase == REBASE_PRESERVE) | |
1678b81e | 814 | argv_array_push(&args, "--preserve-merges"); |
f5eb87b9 JS |
815 | else if (opt_rebase == REBASE_INTERACTIVE) |
816 | argv_array_push(&args, "--interactive"); | |
1678b81e PT |
817 | if (opt_diffstat) |
818 | argv_array_push(&args, opt_diffstat); | |
819 | argv_array_pushv(&args, opt_strategies.argv); | |
820 | argv_array_pushv(&args, opt_strategy_opts.argv); | |
821 | if (opt_gpg_sign) | |
822 | argv_array_push(&args, opt_gpg_sign); | |
f66398eb MJ |
823 | if (opt_autostash == 0) |
824 | argv_array_push(&args, "--no-autostash"); | |
825 | else if (opt_autostash == 1) | |
826 | argv_array_push(&args, "--autostash"); | |
c57e501c AH |
827 | if (opt_verify_signatures && |
828 | !strcmp(opt_verify_signatures, "--verify-signatures")) | |
829 | warning(_("ignoring --verify-signatures for rebase")); | |
1678b81e PT |
830 | |
831 | argv_array_push(&args, "--onto"); | |
ee3051bd | 832 | argv_array_push(&args, oid_to_hex(merge_head)); |
1678b81e | 833 | |
f9b11147 | 834 | if (fork_point && !is_null_oid(fork_point)) |
835 | argv_array_push(&args, oid_to_hex(fork_point)); | |
1678b81e | 836 | else |
ee3051bd | 837 | argv_array_push(&args, oid_to_hex(merge_head)); |
1678b81e PT |
838 | |
839 | ret = run_command_v_opt(args.argv, RUN_GIT_CMD); | |
840 | argv_array_clear(&args); | |
841 | return ret; | |
842 | } | |
843 | ||
1e1ea69f PT |
844 | int cmd_pull(int argc, const char **argv, const char *prefix) |
845 | { | |
f2c5baa1 | 846 | const char *repo, **refspecs; |
910650d2 | 847 | struct oid_array merge_heads = OID_ARRAY_INIT; |
f9b11147 | 848 | struct object_id orig_head, curr_head; |
849 | struct object_id rebase_fork_point; | |
f15e7cf5 | 850 | int autostash; |
f2c5baa1 | 851 | |
41fca098 PT |
852 | if (!getenv("GIT_REFLOG_ACTION")) |
853 | set_reflog_message(argc, argv); | |
854 | ||
cad0c692 NMC |
855 | git_config(git_pull_config, NULL); |
856 | ||
1e1ea69f PT |
857 | argc = parse_options(argc, argv, prefix, pull_options, pull_usage, 0); |
858 | ||
f2c5baa1 PT |
859 | parse_repo_refspecs(argc, argv, &repo, &refspecs); |
860 | ||
a9de9897 PT |
861 | if (!opt_ff) |
862 | opt_ff = xstrdup_or_null(config_get_ff()); | |
863 | ||
81dbd768 PT |
864 | if (opt_rebase < 0) |
865 | opt_rebase = config_get_rebase(); | |
866 | ||
4a4cf9e8 | 867 | if (read_cache_unmerged()) |
8785c425 | 868 | die_resolve_conflict("pull"); |
4a4cf9e8 | 869 | |
102de880 | 870 | if (file_exists(git_path_merge_head(the_repository))) |
4a4cf9e8 PT |
871 | die_conclude_merge(); |
872 | ||
f9b11147 | 873 | if (get_oid("HEAD", &orig_head)) |
874 | oidclr(&orig_head); | |
fe911b8c | 875 | |
f66398eb MJ |
876 | if (!opt_rebase && opt_autostash != -1) |
877 | die(_("--[no-]autostash option is only valid with --rebase.")); | |
878 | ||
f15e7cf5 | 879 | autostash = config_autostash; |
8944969c | 880 | if (opt_rebase) { |
f66398eb MJ |
881 | if (opt_autostash != -1) |
882 | autostash = opt_autostash; | |
53c76dc0 | 883 | |
f9b11147 | 884 | if (is_null_oid(&orig_head) && !is_cache_unborn()) |
8944969c PT |
885 | die(_("Updating an unborn branch with changes added to the index.")); |
886 | ||
53c76dc0 | 887 | if (!autostash) |
ea63b393 | 888 | require_clean_work_tree(N_("pull with rebase"), |
d8cc92ab | 889 | _("please commit or stash them."), 1, 0); |
8944969c | 890 | |
f9b11147 | 891 | if (get_rebase_fork_point(&rebase_fork_point, repo, *refspecs)) |
892 | oidclr(&rebase_fork_point); | |
8944969c | 893 | } |
1678b81e | 894 | |
f2c5baa1 PT |
895 | if (run_fetch(repo, refspecs)) |
896 | return 1; | |
897 | ||
a32975f5 PT |
898 | if (opt_dry_run) |
899 | return 0; | |
900 | ||
f9b11147 | 901 | if (get_oid("HEAD", &curr_head)) |
902 | oidclr(&curr_head); | |
fe911b8c | 903 | |
f9b11147 | 904 | if (!is_null_oid(&orig_head) && !is_null_oid(&curr_head) && |
905 | oidcmp(&orig_head, &curr_head)) { | |
fe911b8c PT |
906 | /* |
907 | * The fetch involved updating the current branch. | |
908 | * | |
909 | * The working tree and the index file are still based on | |
910 | * orig_head commit, but we are merging into curr_head. | |
911 | * Update the working tree to match curr_head. | |
912 | */ | |
913 | ||
914 | warning(_("fetch updated the current branch head.\n" | |
915 | "fast-forwarding your working tree from\n" | |
f9b11147 | 916 | "commit %s."), oid_to_hex(&orig_head)); |
fe911b8c | 917 | |
f06e90da | 918 | if (checkout_fast_forward(&orig_head, &curr_head, 0)) |
fe911b8c PT |
919 | die(_("Cannot fast-forward your working tree.\n" |
920 | "After making sure that you saved anything precious from\n" | |
921 | "$ git diff %s\n" | |
922 | "output, run\n" | |
923 | "$ git reset --hard\n" | |
f9b11147 | 924 | "to recover."), oid_to_hex(&orig_head)); |
fe911b8c PT |
925 | } |
926 | ||
44c175c7 PT |
927 | get_merge_heads(&merge_heads); |
928 | ||
929 | if (!merge_heads.nr) | |
930 | die_no_merge_candidates(repo, refspecs); | |
931 | ||
f9b11147 | 932 | if (is_null_oid(&orig_head)) { |
49ec402d PT |
933 | if (merge_heads.nr > 1) |
934 | die(_("Cannot merge multiple branches into empty head.")); | |
ee3051bd | 935 | return pull_into_void(merge_heads.oid, &curr_head); |
33b842a1 JH |
936 | } |
937 | if (opt_rebase && merge_heads.nr > 1) | |
938 | die(_("Cannot rebase onto multiple branches.")); | |
939 | ||
940 | if (opt_rebase) { | |
a6d7eb2c SB |
941 | int ret = 0; |
942 | if ((recurse_submodules == RECURSE_SUBMODULES_ON || | |
943 | recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND) && | |
944 | submodule_touches_in_range(&rebase_fork_point, &curr_head)) | |
945 | die(_("cannot rebase with locally recorded submodule modifications")); | |
f15e7cf5 TB |
946 | if (!autostash) { |
947 | struct commit_list *list = NULL; | |
948 | struct commit *merge_head, *head; | |
949 | ||
2122f675 SB |
950 | head = lookup_commit_reference(the_repository, |
951 | &orig_head); | |
f15e7cf5 | 952 | commit_list_insert(head, &list); |
2122f675 SB |
953 | merge_head = lookup_commit_reference(the_repository, |
954 | &merge_heads.oid[0]); | |
f15e7cf5 TB |
955 | if (is_descendant_of(merge_head, list)) { |
956 | /* we can fast-forward this without invoking rebase */ | |
957 | opt_ff = "--ff-only"; | |
a6d7eb2c | 958 | ret = run_merge(); |
f15e7cf5 | 959 | } |
33b842a1 | 960 | } |
a6d7eb2c SB |
961 | ret = run_rebase(&curr_head, merge_heads.oid, &rebase_fork_point); |
962 | ||
963 | if (!ret && (recurse_submodules == RECURSE_SUBMODULES_ON || | |
964 | recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)) | |
965 | ret = rebase_submodules(); | |
966 | ||
967 | return ret; | |
33b842a1 | 968 | } else { |
a6d7eb2c SB |
969 | int ret = run_merge(); |
970 | if (!ret && (recurse_submodules == RECURSE_SUBMODULES_ON || | |
971 | recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)) | |
972 | ret = update_submodules(); | |
973 | return ret; | |
33b842a1 | 974 | } |
1e1ea69f | 975 | } |