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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 | */ | |
666f53eb | 8 | #define USE_THE_INDEX_VARIABLE |
1e1ea69f | 9 | #include "cache.h" |
6c6ddf92 | 10 | #include "advice.h" |
b2141fc1 | 11 | #include "config.h" |
1e1ea69f | 12 | #include "builtin.h" |
f394e093 | 13 | #include "gettext.h" |
41771fa4 | 14 | #include "hex.h" |
dabab1d6 | 15 | #include "object-name.h" |
1e1ea69f | 16 | #include "parse-options.h" |
d807c4a0 | 17 | #include "exec-cmd.h" |
f2c5baa1 | 18 | #include "run-command.h" |
fe299ec5 | 19 | #include "oid-array.h" |
44c175c7 | 20 | #include "remote.h" |
4a4cf9e8 | 21 | #include "dir.h" |
88f8576e | 22 | #include "rebase.h" |
49ec402d | 23 | #include "refs.h" |
ec0cb496 | 24 | #include "refspec.h" |
8944969c | 25 | #include "revision.h" |
a6d7eb2c SB |
26 | #include "submodule.h" |
27 | #include "submodule-config.h" | |
db86e61c | 28 | #include "tempfile.h" |
8944969c | 29 | #include "lockfile.h" |
fd84986f | 30 | #include "wt-status.h" |
64043556 | 31 | #include "commit-reach.h" |
d540b70c | 32 | #include "sequencer.h" |
7e44ff7a | 33 | #include "packfile.h" |
1e1ea69f | 34 | |
1678b81e PT |
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 | |
52f1e821 JS |
38 | * "merges", returns REBASE_MERGES. If value is a invalid value, dies with |
39 | * a fatal error if fatal is true, otherwise returns REBASE_INVALID. | |
1678b81e PT |
40 | */ |
41 | static enum rebase_type parse_config_rebase(const char *key, const char *value, | |
42 | int fatal) | |
43 | { | |
88f8576e BW |
44 | enum rebase_type v = rebase_parse_value(value); |
45 | if (v != REBASE_INVALID) | |
46 | return v; | |
1678b81e PT |
47 | |
48 | if (fatal) | |
1a8aea85 | 49 | die(_("invalid value for '%s': '%s'"), key, value); |
1678b81e | 50 | else |
1a8aea85 | 51 | error(_("invalid value for '%s': '%s'"), key, value); |
1678b81e PT |
52 | |
53 | return REBASE_INVALID; | |
54 | } | |
55 | ||
56 | /** | |
57 | * Callback for --rebase, which parses arg with parse_config_rebase(). | |
58 | */ | |
59 | static int parse_opt_rebase(const struct option *opt, const char *arg, int unset) | |
60 | { | |
61 | enum rebase_type *value = opt->value; | |
62 | ||
63 | if (arg) | |
64 | *value = parse_config_rebase("--rebase", arg, 0); | |
65 | else | |
66 | *value = unset ? REBASE_FALSE : REBASE_TRUE; | |
67 | return *value == REBASE_INVALID ? -1 : 0; | |
68 | } | |
69 | ||
1e1ea69f | 70 | static const char * const pull_usage[] = { |
e7a7401f | 71 | N_("git pull [<options>] [<repository> [<refspec>...]]"), |
1e1ea69f PT |
72 | NULL |
73 | }; | |
74 | ||
2a747902 PT |
75 | /* Shared options */ |
76 | static int opt_verbosity; | |
77 | static char *opt_progress; | |
a6d7eb2c | 78 | static int recurse_submodules = RECURSE_SUBMODULES_DEFAULT; |
58194173 | 79 | static int recurse_submodules_cli = RECURSE_SUBMODULES_DEFAULT; |
2a747902 | 80 | |
1678b81e | 81 | /* Options passed to git-merge or git-rebase */ |
81dbd768 | 82 | static enum rebase_type opt_rebase = -1; |
11b6d178 PT |
83 | static char *opt_diffstat; |
84 | static char *opt_log; | |
3a4d2c74 | 85 | static char *opt_signoff; |
11b6d178 PT |
86 | static char *opt_squash; |
87 | static char *opt_commit; | |
88 | static char *opt_edit; | |
d540b70c | 89 | static char *cleanup_arg; |
11b6d178 PT |
90 | static char *opt_ff; |
91 | static char *opt_verify_signatures; | |
47bfdfb3 | 92 | static char *opt_verify; |
f66398eb | 93 | static int opt_autostash = -1; |
c48d73bd | 94 | static int config_autostash; |
54887b46 | 95 | static int check_trust_level = 1; |
22f9b7f3 JK |
96 | static struct strvec opt_strategies = STRVEC_INIT; |
97 | static struct strvec opt_strategy_opts = STRVEC_INIT; | |
11b6d178 | 98 | static char *opt_gpg_sign; |
09c2cb87 | 99 | static int opt_allow_unrelated_histories; |
11b6d178 | 100 | |
a32975f5 PT |
101 | /* Options passed to git-fetch */ |
102 | static char *opt_all; | |
103 | static char *opt_append; | |
104 | static char *opt_upload_pack; | |
105 | static int opt_force; | |
106 | static char *opt_tags; | |
107 | static char *opt_prune; | |
62104ba1 | 108 | static char *max_children; |
a32975f5 PT |
109 | static int opt_dry_run; |
110 | static char *opt_keep; | |
111 | static char *opt_depth; | |
112 | static char *opt_unshallow; | |
113 | static char *opt_update_shallow; | |
114 | static char *opt_refmap; | |
ffb4568a WS |
115 | static char *opt_ipv4; |
116 | static char *opt_ipv6; | |
3883c551 | 117 | static int opt_show_forced_updates = -1; |
24bc1a12 | 118 | static char *set_upstream; |
22f9b7f3 | 119 | static struct strvec opt_fetch = STRVEC_INIT; |
a32975f5 | 120 | |
1e1ea69f | 121 | static struct option pull_options[] = { |
2a747902 PT |
122 | /* Shared options */ |
123 | OPT__VERBOSITY(&opt_verbosity), | |
124 | OPT_PASSTHRU(0, "progress", &opt_progress, NULL, | |
125 | N_("force progress reporting"), | |
126 | PARSE_OPT_NOARG), | |
203c8533 | 127 | OPT_CALLBACK_F(0, "recurse-submodules", |
58194173 | 128 | &recurse_submodules_cli, N_("on-demand"), |
a6d7eb2c | 129 | N_("control for recursive fetching of submodules"), |
203c8533 | 130 | PARSE_OPT_OPTARG, option_fetch_parse_recurse_submodules), |
2a747902 | 131 | |
1678b81e | 132 | /* Options passed to git-merge or git-rebase */ |
11b6d178 | 133 | OPT_GROUP(N_("Options related to merging")), |
203c8533 | 134 | OPT_CALLBACK_F('r', "rebase", &opt_rebase, |
52f1e821 | 135 | "(false|true|merges|interactive)", |
a7d18a11 FC |
136 | N_("incorporate changes by rebasing rather than merging"), |
137 | PARSE_OPT_OPTARG, parse_opt_rebase), | |
11b6d178 PT |
138 | OPT_PASSTHRU('n', NULL, &opt_diffstat, NULL, |
139 | N_("do not show a diffstat at the end of the merge"), | |
140 | PARSE_OPT_NOARG | PARSE_OPT_NONEG), | |
141 | OPT_PASSTHRU(0, "stat", &opt_diffstat, NULL, | |
142 | N_("show a diffstat at the end of the merge"), | |
143 | PARSE_OPT_NOARG), | |
144 | OPT_PASSTHRU(0, "summary", &opt_diffstat, NULL, | |
145 | N_("(synonym to --stat)"), | |
146 | PARSE_OPT_NOARG | PARSE_OPT_HIDDEN), | |
147 | OPT_PASSTHRU(0, "log", &opt_log, N_("n"), | |
148 | N_("add (at most <n>) entries from shortlog to merge commit message"), | |
149 | PARSE_OPT_OPTARG), | |
3a4d2c74 | 150 | OPT_PASSTHRU(0, "signoff", &opt_signoff, NULL, |
3abd4a67 | 151 | N_("add a Signed-off-by trailer"), |
3a4d2c74 | 152 | PARSE_OPT_OPTARG), |
11b6d178 PT |
153 | OPT_PASSTHRU(0, "squash", &opt_squash, NULL, |
154 | N_("create a single commit instead of doing a merge"), | |
155 | PARSE_OPT_NOARG), | |
156 | OPT_PASSTHRU(0, "commit", &opt_commit, NULL, | |
157 | N_("perform a commit if the merge succeeds (default)"), | |
158 | PARSE_OPT_NOARG), | |
159 | OPT_PASSTHRU(0, "edit", &opt_edit, NULL, | |
160 | N_("edit message before committing"), | |
161 | PARSE_OPT_NOARG), | |
d540b70c | 162 | OPT_CLEANUP(&cleanup_arg), |
11b6d178 PT |
163 | OPT_PASSTHRU(0, "ff", &opt_ff, NULL, |
164 | N_("allow fast-forward"), | |
165 | PARSE_OPT_NOARG), | |
166 | OPT_PASSTHRU(0, "ff-only", &opt_ff, NULL, | |
167 | N_("abort if fast-forward is not possible"), | |
168 | PARSE_OPT_NOARG | PARSE_OPT_NONEG), | |
47bfdfb3 AR |
169 | OPT_PASSTHRU(0, "verify", &opt_verify, NULL, |
170 | N_("control use of pre-merge-commit and commit-msg hooks"), | |
171 | PARSE_OPT_NOARG), | |
11b6d178 PT |
172 | OPT_PASSTHRU(0, "verify-signatures", &opt_verify_signatures, NULL, |
173 | N_("verify that the named commit has a valid GPG signature"), | |
174 | PARSE_OPT_NOARG), | |
f66398eb | 175 | OPT_BOOL(0, "autostash", &opt_autostash, |
d9f15d37 | 176 | N_("automatically stash/stash pop before and after")), |
11b6d178 PT |
177 | OPT_PASSTHRU_ARGV('s', "strategy", &opt_strategies, N_("strategy"), |
178 | N_("merge strategy to use"), | |
179 | 0), | |
180 | OPT_PASSTHRU_ARGV('X', "strategy-option", &opt_strategy_opts, | |
181 | N_("option=value"), | |
182 | N_("option for selected merge strategy"), | |
183 | 0), | |
184 | OPT_PASSTHRU('S', "gpg-sign", &opt_gpg_sign, N_("key-id"), | |
185 | N_("GPG sign commit"), | |
186 | PARSE_OPT_OPTARG), | |
09c2cb87 JH |
187 | OPT_SET_INT(0, "allow-unrelated-histories", |
188 | &opt_allow_unrelated_histories, | |
189 | N_("allow merging unrelated histories"), 1), | |
11b6d178 | 190 | |
a32975f5 PT |
191 | /* Options passed to git-fetch */ |
192 | OPT_GROUP(N_("Options related to fetching")), | |
193 | OPT_PASSTHRU(0, "all", &opt_all, NULL, | |
194 | N_("fetch from all remotes"), | |
195 | PARSE_OPT_NOARG), | |
196 | OPT_PASSTHRU('a', "append", &opt_append, NULL, | |
197 | N_("append to .git/FETCH_HEAD instead of overwriting"), | |
198 | PARSE_OPT_NOARG), | |
199 | OPT_PASSTHRU(0, "upload-pack", &opt_upload_pack, N_("path"), | |
200 | N_("path to upload pack on remote end"), | |
201 | 0), | |
1224781d | 202 | OPT__FORCE(&opt_force, N_("force overwrite of local branch"), 0), |
a32975f5 PT |
203 | OPT_PASSTHRU('t', "tags", &opt_tags, NULL, |
204 | N_("fetch all tags and associated objects"), | |
205 | PARSE_OPT_NOARG), | |
206 | OPT_PASSTHRU('p', "prune", &opt_prune, NULL, | |
207 | N_("prune remote-tracking branches no longer on remote"), | |
208 | PARSE_OPT_NOARG), | |
62104ba1 SB |
209 | OPT_PASSTHRU('j', "jobs", &max_children, N_("n"), |
210 | N_("number of submodules pulled in parallel"), | |
211 | PARSE_OPT_OPTARG), | |
a32975f5 PT |
212 | OPT_BOOL(0, "dry-run", &opt_dry_run, |
213 | N_("dry run")), | |
214 | OPT_PASSTHRU('k', "keep", &opt_keep, NULL, | |
215 | N_("keep downloaded pack"), | |
216 | PARSE_OPT_NOARG), | |
217 | OPT_PASSTHRU(0, "depth", &opt_depth, N_("depth"), | |
218 | N_("deepen history of shallow clone"), | |
219 | 0), | |
13ac5edb RS |
220 | OPT_PASSTHRU_ARGV(0, "shallow-since", &opt_fetch, N_("time"), |
221 | N_("deepen history of shallow repository based on time"), | |
222 | 0), | |
223 | OPT_PASSTHRU_ARGV(0, "shallow-exclude", &opt_fetch, N_("revision"), | |
224 | N_("deepen history of shallow clone, excluding rev"), | |
225 | 0), | |
226 | OPT_PASSTHRU_ARGV(0, "deepen", &opt_fetch, N_("n"), | |
227 | N_("deepen history of shallow clone"), | |
228 | 0), | |
a32975f5 PT |
229 | OPT_PASSTHRU(0, "unshallow", &opt_unshallow, NULL, |
230 | N_("convert to a complete repository"), | |
231 | PARSE_OPT_NONEG | PARSE_OPT_NOARG), | |
232 | OPT_PASSTHRU(0, "update-shallow", &opt_update_shallow, NULL, | |
233 | N_("accept refs that update .git/shallow"), | |
234 | PARSE_OPT_NOARG), | |
235 | OPT_PASSTHRU(0, "refmap", &opt_refmap, N_("refmap"), | |
236 | N_("specify fetch refmap"), | |
237 | PARSE_OPT_NONEG), | |
13ac5edb RS |
238 | OPT_PASSTHRU_ARGV('o', "server-option", &opt_fetch, |
239 | N_("server-specific"), | |
240 | N_("option to transmit"), | |
241 | 0), | |
ffb4568a WS |
242 | OPT_PASSTHRU('4', "ipv4", &opt_ipv4, NULL, |
243 | N_("use IPv4 addresses only"), | |
244 | PARSE_OPT_NOARG), | |
245 | OPT_PASSTHRU('6', "ipv6", &opt_ipv6, NULL, | |
246 | N_("use IPv6 addresses only"), | |
247 | PARSE_OPT_NOARG), | |
13ac5edb RS |
248 | OPT_PASSTHRU_ARGV(0, "negotiation-tip", &opt_fetch, N_("revision"), |
249 | N_("report that we have only objects reachable from this object"), | |
250 | 0), | |
3883c551 DS |
251 | OPT_BOOL(0, "show-forced-updates", &opt_show_forced_updates, |
252 | N_("check for forced-updates on all updated branches")), | |
24bc1a12 CB |
253 | OPT_PASSTHRU(0, "set-upstream", &set_upstream, NULL, |
254 | N_("set upstream for git pull/fetch"), | |
255 | PARSE_OPT_NOARG), | |
a32975f5 | 256 | |
1e1ea69f PT |
257 | OPT_END() |
258 | }; | |
259 | ||
2a747902 PT |
260 | /** |
261 | * Pushes "-q" or "-v" switches into arr to match the opt_verbosity level. | |
262 | */ | |
22f9b7f3 | 263 | static void argv_push_verbosity(struct strvec *arr) |
2a747902 PT |
264 | { |
265 | int verbosity; | |
266 | ||
267 | for (verbosity = opt_verbosity; verbosity > 0; verbosity--) | |
22f9b7f3 | 268 | strvec_push(arr, "-v"); |
2a747902 PT |
269 | |
270 | for (verbosity = opt_verbosity; verbosity < 0; verbosity++) | |
22f9b7f3 | 271 | strvec_push(arr, "-q"); |
2a747902 PT |
272 | } |
273 | ||
a32975f5 PT |
274 | /** |
275 | * Pushes "-f" switches into arr to match the opt_force level. | |
276 | */ | |
22f9b7f3 | 277 | static void argv_push_force(struct strvec *arr) |
a32975f5 PT |
278 | { |
279 | int force = opt_force; | |
280 | while (force-- > 0) | |
22f9b7f3 | 281 | strvec_push(arr, "-f"); |
a32975f5 PT |
282 | } |
283 | ||
41fca098 PT |
284 | /** |
285 | * Sets the GIT_REFLOG_ACTION environment variable to the concatenation of argv | |
286 | */ | |
287 | static void set_reflog_message(int argc, const char **argv) | |
288 | { | |
289 | int i; | |
290 | struct strbuf msg = STRBUF_INIT; | |
291 | ||
292 | for (i = 0; i < argc; i++) { | |
293 | if (i) | |
294 | strbuf_addch(&msg, ' '); | |
295 | strbuf_addstr(&msg, argv[i]); | |
296 | } | |
297 | ||
298 | setenv("GIT_REFLOG_ACTION", msg.buf, 0); | |
299 | ||
300 | strbuf_release(&msg); | |
301 | } | |
302 | ||
a9de9897 PT |
303 | /** |
304 | * If pull.ff is unset, returns NULL. If pull.ff is "true", returns "--ff". If | |
305 | * pull.ff is "false", returns "--no-ff". If pull.ff is "only", returns | |
306 | * "--ff-only". Otherwise, if pull.ff is set to an invalid value, die with an | |
307 | * error. | |
308 | */ | |
309 | static const char *config_get_ff(void) | |
310 | { | |
311 | const char *value; | |
312 | ||
313 | if (git_config_get_value("pull.ff", &value)) | |
314 | return NULL; | |
315 | ||
89576613 | 316 | switch (git_parse_maybe_bool(value)) { |
a9de9897 PT |
317 | case 0: |
318 | return "--no-ff"; | |
319 | case 1: | |
320 | return "--ff"; | |
321 | } | |
322 | ||
323 | if (!strcmp(value, "only")) | |
324 | return "--ff-only"; | |
325 | ||
1a8aea85 | 326 | die(_("invalid value for '%s': '%s'"), "pull.ff", value); |
a9de9897 PT |
327 | } |
328 | ||
81dbd768 PT |
329 | /** |
330 | * Returns the default configured value for --rebase. It first looks for the | |
331 | * value of "branch.$curr_branch.rebase", where $curr_branch is the current | |
332 | * branch, and if HEAD is detached or the configuration key does not exist, | |
333 | * looks for the value of "pull.rebase". If both configuration keys do not | |
334 | * exist, returns REBASE_FALSE. | |
335 | */ | |
b044db91 | 336 | static enum rebase_type config_get_rebase(int *rebase_unspecified) |
81dbd768 PT |
337 | { |
338 | struct branch *curr_branch = branch_get("HEAD"); | |
339 | const char *value; | |
340 | ||
341 | if (curr_branch) { | |
342 | char *key = xstrfmt("branch.%s.rebase", curr_branch->name); | |
343 | ||
344 | if (!git_config_get_value(key, &value)) { | |
345 | enum rebase_type ret = parse_config_rebase(key, value, 1); | |
346 | free(key); | |
347 | return ret; | |
348 | } | |
349 | ||
350 | free(key); | |
351 | } | |
352 | ||
353 | if (!git_config_get_value("pull.rebase", &value)) | |
354 | return parse_config_rebase("pull.rebase", value, 1); | |
355 | ||
b044db91 | 356 | *rebase_unspecified = 1; |
d18c950a | 357 | |
81dbd768 PT |
358 | return REBASE_FALSE; |
359 | } | |
360 | ||
c48d73bd MJ |
361 | /** |
362 | * Read config variables. | |
363 | */ | |
364 | static int git_pull_config(const char *var, const char *value, void *cb) | |
365 | { | |
366 | if (!strcmp(var, "rebase.autostash")) { | |
367 | config_autostash = git_config_bool(var, value); | |
368 | return 0; | |
121e43fa NMC |
369 | } else if (!strcmp(var, "submodule.recurse")) { |
370 | recurse_submodules = git_config_bool(var, value) ? | |
371 | RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF; | |
372 | return 0; | |
54887b46 HJI |
373 | } else if (!strcmp(var, "gpg.mintrustlevel")) { |
374 | check_trust_level = 0; | |
c48d73bd | 375 | } |
54887b46 | 376 | |
c48d73bd MJ |
377 | return git_default_config(var, value, cb); |
378 | } | |
379 | ||
44c175c7 PT |
380 | /** |
381 | * Appends merge candidates from FETCH_HEAD that are not marked not-for-merge | |
382 | * into merge_heads. | |
383 | */ | |
910650d2 | 384 | static void get_merge_heads(struct oid_array *merge_heads) |
44c175c7 | 385 | { |
102de880 | 386 | const char *filename = git_path_fetch_head(the_repository); |
44c175c7 PT |
387 | FILE *fp; |
388 | struct strbuf sb = STRBUF_INIT; | |
14bb40b3 | 389 | struct object_id oid; |
44c175c7 | 390 | |
23a9e071 | 391 | fp = xfopen(filename, "r"); |
8f309aeb | 392 | while (strbuf_getline_lf(&sb, fp) != EOF) { |
fbfc089d | 393 | const char *p; |
394 | if (parse_oid_hex(sb.buf, &oid, &p)) | |
395 | continue; /* invalid line: does not start with object ID */ | |
396 | if (starts_with(p, "\tnot-for-merge\t")) | |
44c175c7 | 397 | continue; /* ref is not-for-merge */ |
910650d2 | 398 | oid_array_append(merge_heads, &oid); |
44c175c7 PT |
399 | } |
400 | fclose(fp); | |
401 | strbuf_release(&sb); | |
402 | } | |
403 | ||
404 | /** | |
405 | * Used by die_no_merge_candidates() as a for_each_remote() callback to | |
406 | * retrieve the name of the remote if the repository only has one remote. | |
407 | */ | |
408 | static int get_only_remote(struct remote *remote, void *cb_data) | |
409 | { | |
410 | const char **remote_name = cb_data; | |
411 | ||
412 | if (*remote_name) | |
413 | return -1; | |
414 | ||
415 | *remote_name = remote->name; | |
416 | return 0; | |
417 | } | |
418 | ||
419 | /** | |
420 | * Dies with the appropriate reason for why there are no merge candidates: | |
421 | * | |
422 | * 1. We fetched from a specific remote, and a refspec was given, but it ended | |
423 | * up not fetching anything. This is usually because the user provided a | |
424 | * wildcard refspec which had no matches on the remote end. | |
425 | * | |
426 | * 2. We fetched from a non-default remote, but didn't specify a branch to | |
427 | * merge. We can't use the configured one because it applies to the default | |
428 | * remote, thus the user must specify the branches to merge. | |
429 | * | |
430 | * 3. We fetched from the branch's or repo's default remote, but: | |
431 | * | |
432 | * a. We are not on a branch, so there will never be a configured branch to | |
433 | * merge with. | |
434 | * | |
435 | * b. We are on a branch, but there is no configured branch to merge with. | |
436 | * | |
437 | * 4. We fetched from the branch's or repo's default remote, but the configured | |
438 | * branch to merge didn't get fetched. (Either it doesn't exist, or wasn't | |
439 | * part of the configured fetch refspec.) | |
440 | */ | |
441 | static void NORETURN die_no_merge_candidates(const char *repo, const char **refspecs) | |
442 | { | |
443 | struct branch *curr_branch = branch_get("HEAD"); | |
444 | const char *remote = curr_branch ? curr_branch->remote_name : NULL; | |
445 | ||
446 | if (*refspecs) { | |
b7b31471 PT |
447 | if (opt_rebase) |
448 | fprintf_ln(stderr, _("There is no candidate for rebasing against among the refs that you just fetched.")); | |
449 | else | |
450 | fprintf_ln(stderr, _("There are no candidates for merging among the refs that you just fetched.")); | |
44c175c7 PT |
451 | fprintf_ln(stderr, _("Generally this means that you provided a wildcard refspec which had no\n" |
452 | "matches on the remote end.")); | |
453 | } else if (repo && curr_branch && (!remote || strcmp(repo, remote))) { | |
454 | fprintf_ln(stderr, _("You asked to pull from the remote '%s', but did not specify\n" | |
455 | "a branch. Because this is not the default configured remote\n" | |
456 | "for your current branch, you must specify a branch on the command line."), | |
457 | repo); | |
458 | } else if (!curr_branch) { | |
459 | fprintf_ln(stderr, _("You are not currently on a branch.")); | |
b7b31471 PT |
460 | if (opt_rebase) |
461 | fprintf_ln(stderr, _("Please specify which branch you want to rebase against.")); | |
462 | else | |
463 | fprintf_ln(stderr, _("Please specify which branch you want to merge with.")); | |
44c175c7 PT |
464 | fprintf_ln(stderr, _("See git-pull(1) for details.")); |
465 | fprintf(stderr, "\n"); | |
8a0de58a | 466 | fprintf_ln(stderr, " git pull %s %s", _("<remote>"), _("<branch>")); |
44c175c7 PT |
467 | fprintf(stderr, "\n"); |
468 | } else if (!curr_branch->merge_nr) { | |
469 | const char *remote_name = NULL; | |
470 | ||
471 | if (for_each_remote(get_only_remote, &remote_name) || !remote_name) | |
8a0de58a | 472 | remote_name = _("<remote>"); |
44c175c7 PT |
473 | |
474 | fprintf_ln(stderr, _("There is no tracking information for the current branch.")); | |
b7b31471 PT |
475 | if (opt_rebase) |
476 | fprintf_ln(stderr, _("Please specify which branch you want to rebase against.")); | |
477 | else | |
478 | fprintf_ln(stderr, _("Please specify which branch you want to merge with.")); | |
44c175c7 PT |
479 | fprintf_ln(stderr, _("See git-pull(1) for details.")); |
480 | fprintf(stderr, "\n"); | |
8a0de58a | 481 | fprintf_ln(stderr, " git pull %s %s", _("<remote>"), _("<branch>")); |
44c175c7 | 482 | fprintf(stderr, "\n"); |
daf9f649 VA |
483 | fprintf_ln(stderr, _("If you wish to set tracking information for this branch you can do so with:")); |
484 | fprintf(stderr, "\n"); | |
485 | fprintf_ln(stderr, " git branch --set-upstream-to=%s/%s %s\n", | |
486 | remote_name, _("<branch>"), curr_branch->name); | |
44c175c7 PT |
487 | } else |
488 | fprintf_ln(stderr, _("Your configuration specifies to merge with the ref '%s'\n" | |
489 | "from the remote, but no such ref was fetched."), | |
490 | *curr_branch->merge_name); | |
491 | exit(1); | |
492 | } | |
493 | ||
f2c5baa1 PT |
494 | /** |
495 | * Parses argv into [<repo> [<refspecs>...]], returning their values in `repo` | |
496 | * as a string and `refspecs` as a null-terminated array of strings. If `repo` | |
497 | * is not provided in argv, it is set to NULL. | |
498 | */ | |
499 | static void parse_repo_refspecs(int argc, const char **argv, const char **repo, | |
500 | const char ***refspecs) | |
501 | { | |
502 | if (argc > 0) { | |
503 | *repo = *argv++; | |
504 | argc--; | |
505 | } else | |
506 | *repo = NULL; | |
507 | *refspecs = argv; | |
508 | } | |
509 | ||
510 | /** | |
511 | * Runs git-fetch, returning its exit status. `repo` and `refspecs` are the | |
512 | * repository and refspecs to fetch, or NULL if they are not provided. | |
513 | */ | |
514 | static int run_fetch(const char *repo, const char **refspecs) | |
515 | { | |
0e906739 | 516 | struct child_process cmd = CHILD_PROCESS_INIT; |
f2c5baa1 | 517 | |
0e906739 | 518 | strvec_pushl(&cmd.args, "fetch", "--update-head-ok", NULL); |
2a747902 PT |
519 | |
520 | /* Shared options */ | |
0e906739 | 521 | argv_push_verbosity(&cmd.args); |
2a747902 | 522 | if (opt_progress) |
0e906739 | 523 | strvec_push(&cmd.args, opt_progress); |
2a747902 | 524 | |
a32975f5 PT |
525 | /* Options passed to git-fetch */ |
526 | if (opt_all) | |
0e906739 | 527 | strvec_push(&cmd.args, opt_all); |
a32975f5 | 528 | if (opt_append) |
0e906739 | 529 | strvec_push(&cmd.args, opt_append); |
a32975f5 | 530 | if (opt_upload_pack) |
0e906739 RS |
531 | strvec_push(&cmd.args, opt_upload_pack); |
532 | argv_push_force(&cmd.args); | |
a32975f5 | 533 | if (opt_tags) |
0e906739 | 534 | strvec_push(&cmd.args, opt_tags); |
a32975f5 | 535 | if (opt_prune) |
0e906739 | 536 | strvec_push(&cmd.args, opt_prune); |
58194173 GC |
537 | if (recurse_submodules_cli != RECURSE_SUBMODULES_DEFAULT) |
538 | switch (recurse_submodules_cli) { | |
a6d7eb2c | 539 | case RECURSE_SUBMODULES_ON: |
0e906739 | 540 | strvec_push(&cmd.args, "--recurse-submodules=on"); |
a6d7eb2c SB |
541 | break; |
542 | case RECURSE_SUBMODULES_OFF: | |
0e906739 | 543 | strvec_push(&cmd.args, "--recurse-submodules=no"); |
a6d7eb2c SB |
544 | break; |
545 | case RECURSE_SUBMODULES_ON_DEMAND: | |
0e906739 | 546 | strvec_push(&cmd.args, "--recurse-submodules=on-demand"); |
a6d7eb2c SB |
547 | break; |
548 | default: | |
549 | BUG("submodule recursion option not understood"); | |
550 | } | |
62104ba1 | 551 | if (max_children) |
0e906739 | 552 | strvec_push(&cmd.args, max_children); |
a32975f5 | 553 | if (opt_dry_run) |
0e906739 | 554 | strvec_push(&cmd.args, "--dry-run"); |
a32975f5 | 555 | if (opt_keep) |
0e906739 | 556 | strvec_push(&cmd.args, opt_keep); |
a32975f5 | 557 | if (opt_depth) |
0e906739 | 558 | strvec_push(&cmd.args, opt_depth); |
a32975f5 | 559 | if (opt_unshallow) |
0e906739 | 560 | strvec_push(&cmd.args, opt_unshallow); |
a32975f5 | 561 | if (opt_update_shallow) |
0e906739 | 562 | strvec_push(&cmd.args, opt_update_shallow); |
a32975f5 | 563 | if (opt_refmap) |
0e906739 | 564 | strvec_push(&cmd.args, opt_refmap); |
ffb4568a | 565 | if (opt_ipv4) |
0e906739 | 566 | strvec_push(&cmd.args, opt_ipv4); |
ffb4568a | 567 | if (opt_ipv6) |
0e906739 | 568 | strvec_push(&cmd.args, opt_ipv6); |
3883c551 | 569 | if (opt_show_forced_updates > 0) |
0e906739 | 570 | strvec_push(&cmd.args, "--show-forced-updates"); |
3883c551 | 571 | else if (opt_show_forced_updates == 0) |
0e906739 | 572 | strvec_push(&cmd.args, "--no-show-forced-updates"); |
24bc1a12 | 573 | if (set_upstream) |
0e906739 RS |
574 | strvec_push(&cmd.args, set_upstream); |
575 | strvec_pushv(&cmd.args, opt_fetch.v); | |
a32975f5 | 576 | |
f2c5baa1 | 577 | if (repo) { |
0e906739 RS |
578 | strvec_push(&cmd.args, repo); |
579 | strvec_pushv(&cmd.args, refspecs); | |
f2c5baa1 | 580 | } else if (*refspecs) |
033abf97 | 581 | BUG("refspecs without repo?"); |
0e906739 RS |
582 | cmd.git_cmd = 1; |
583 | cmd.close_object_store = 1; | |
584 | return run_command(&cmd); | |
f2c5baa1 PT |
585 | } |
586 | ||
49ec402d PT |
587 | /** |
588 | * "Pulls into void" by branching off merge_head. | |
589 | */ | |
ee3051bd | 590 | static int pull_into_void(const struct object_id *merge_head, |
f9b11147 | 591 | const struct object_id *curr_head) |
49ec402d | 592 | { |
01a31f3b JK |
593 | if (opt_verify_signatures) { |
594 | struct commit *commit; | |
595 | ||
596 | commit = lookup_commit(the_repository, merge_head); | |
597 | if (!commit) | |
598 | die(_("unable to access commit %s"), | |
599 | oid_to_hex(merge_head)); | |
600 | ||
54887b46 HJI |
601 | verify_merge_signature(commit, opt_verbosity, |
602 | check_trust_level); | |
01a31f3b JK |
603 | } |
604 | ||
49ec402d PT |
605 | /* |
606 | * Two-way merge: we treat the index as based on an empty tree, | |
607 | * and try to fast-forward to HEAD. This ensures we will not lose | |
608 | * index/worktree changes that the user already made on the unborn | |
609 | * branch. | |
610 | */ | |
7e196c3a NTND |
611 | if (checkout_fast_forward(the_repository, |
612 | the_hash_algo->empty_tree, | |
613 | merge_head, 0)) | |
49ec402d PT |
614 | return 1; |
615 | ||
ae077771 | 616 | if (update_ref("initial pull", "HEAD", merge_head, curr_head, 0, UPDATE_REFS_DIE_ON_ERR)) |
49ec402d PT |
617 | return 1; |
618 | ||
619 | return 0; | |
620 | } | |
621 | ||
a6d7eb2c SB |
622 | static int rebase_submodules(void) |
623 | { | |
624 | struct child_process cp = CHILD_PROCESS_INIT; | |
625 | ||
626 | cp.git_cmd = 1; | |
627 | cp.no_stdin = 1; | |
22f9b7f3 | 628 | strvec_pushl(&cp.args, "submodule", "update", |
f6d8942b | 629 | "--recursive", "--rebase", NULL); |
a56771a6 | 630 | argv_push_verbosity(&cp.args); |
a6d7eb2c SB |
631 | |
632 | return run_command(&cp); | |
633 | } | |
634 | ||
635 | static int update_submodules(void) | |
636 | { | |
637 | struct child_process cp = CHILD_PROCESS_INIT; | |
638 | ||
639 | cp.git_cmd = 1; | |
640 | cp.no_stdin = 1; | |
22f9b7f3 | 641 | strvec_pushl(&cp.args, "submodule", "update", |
f6d8942b | 642 | "--recursive", "--checkout", NULL); |
a56771a6 | 643 | argv_push_verbosity(&cp.args); |
a6d7eb2c SB |
644 | |
645 | return run_command(&cp); | |
646 | } | |
647 | ||
f2c5baa1 PT |
648 | /** |
649 | * Runs git-merge, returning its exit status. | |
650 | */ | |
651 | static int run_merge(void) | |
652 | { | |
0e906739 | 653 | struct child_process cmd = CHILD_PROCESS_INIT; |
f2c5baa1 | 654 | |
0e906739 | 655 | strvec_pushl(&cmd.args, "merge", NULL); |
2a747902 PT |
656 | |
657 | /* Shared options */ | |
0e906739 | 658 | argv_push_verbosity(&cmd.args); |
2a747902 | 659 | if (opt_progress) |
0e906739 | 660 | strvec_push(&cmd.args, opt_progress); |
2a747902 | 661 | |
11b6d178 PT |
662 | /* Options passed to git-merge */ |
663 | if (opt_diffstat) | |
0e906739 | 664 | strvec_push(&cmd.args, opt_diffstat); |
11b6d178 | 665 | if (opt_log) |
0e906739 | 666 | strvec_push(&cmd.args, opt_log); |
3a4d2c74 | 667 | if (opt_signoff) |
0e906739 | 668 | strvec_push(&cmd.args, opt_signoff); |
11b6d178 | 669 | if (opt_squash) |
0e906739 | 670 | strvec_push(&cmd.args, opt_squash); |
11b6d178 | 671 | if (opt_commit) |
0e906739 | 672 | strvec_push(&cmd.args, opt_commit); |
11b6d178 | 673 | if (opt_edit) |
0e906739 | 674 | strvec_push(&cmd.args, opt_edit); |
d540b70c | 675 | if (cleanup_arg) |
0e906739 | 676 | strvec_pushf(&cmd.args, "--cleanup=%s", cleanup_arg); |
11b6d178 | 677 | if (opt_ff) |
0e906739 | 678 | strvec_push(&cmd.args, opt_ff); |
47bfdfb3 | 679 | if (opt_verify) |
0e906739 | 680 | strvec_push(&cmd.args, opt_verify); |
11b6d178 | 681 | if (opt_verify_signatures) |
0e906739 RS |
682 | strvec_push(&cmd.args, opt_verify_signatures); |
683 | strvec_pushv(&cmd.args, opt_strategies.v); | |
684 | strvec_pushv(&cmd.args, opt_strategy_opts.v); | |
11b6d178 | 685 | if (opt_gpg_sign) |
0e906739 | 686 | strvec_push(&cmd.args, opt_gpg_sign); |
d9f15d37 | 687 | if (opt_autostash == 0) |
0e906739 | 688 | strvec_push(&cmd.args, "--no-autostash"); |
d9f15d37 | 689 | else if (opt_autostash == 1) |
0e906739 | 690 | strvec_push(&cmd.args, "--autostash"); |
09c2cb87 | 691 | if (opt_allow_unrelated_histories > 0) |
0e906739 | 692 | strvec_push(&cmd.args, "--allow-unrelated-histories"); |
11b6d178 | 693 | |
0e906739 RS |
694 | strvec_push(&cmd.args, "FETCH_HEAD"); |
695 | cmd.git_cmd = 1; | |
696 | return run_command(&cmd); | |
f2c5baa1 PT |
697 | } |
698 | ||
1678b81e PT |
699 | /** |
700 | * Returns remote's upstream branch for the current branch. If remote is NULL, | |
701 | * the current branch's configured default remote is used. Returns NULL if | |
702 | * `remote` does not name a valid remote, HEAD does not point to a branch, | |
703 | * remote is not the branch's configured remote or the branch does not have any | |
704 | * configured upstream branch. | |
705 | */ | |
706 | static const char *get_upstream_branch(const char *remote) | |
707 | { | |
708 | struct remote *rm; | |
709 | struct branch *curr_branch; | |
710 | const char *curr_branch_remote; | |
711 | ||
712 | rm = remote_get(remote); | |
713 | if (!rm) | |
714 | return NULL; | |
715 | ||
716 | curr_branch = branch_get("HEAD"); | |
717 | if (!curr_branch) | |
718 | return NULL; | |
719 | ||
720 | curr_branch_remote = remote_for_branch(curr_branch, NULL); | |
721 | assert(curr_branch_remote); | |
722 | ||
723 | if (strcmp(curr_branch_remote, rm->name)) | |
724 | return NULL; | |
725 | ||
726 | return branch_get_upstream(curr_branch, NULL); | |
727 | } | |
728 | ||
729 | /** | |
30aa96cd | 730 | * Derives the remote-tracking branch from the remote and refspec. |
1678b81e PT |
731 | * |
732 | * FIXME: The current implementation assumes the default mapping of | |
733 | * refs/heads/<branch_name> to refs/remotes/<remote_name>/<branch_name>. | |
734 | */ | |
735 | static const char *get_tracking_branch(const char *remote, const char *refspec) | |
736 | { | |
895d3912 | 737 | struct refspec_item spec; |
1678b81e PT |
738 | const char *spec_src; |
739 | const char *merge_branch; | |
740 | ||
dc064221 | 741 | refspec_item_init_or_die(&spec, refspec, REFSPEC_FETCH); |
895d3912 | 742 | spec_src = spec.src; |
1678b81e PT |
743 | if (!*spec_src || !strcmp(spec_src, "HEAD")) |
744 | spec_src = "HEAD"; | |
745 | else if (skip_prefix(spec_src, "heads/", &spec_src)) | |
746 | ; | |
747 | else if (skip_prefix(spec_src, "refs/heads/", &spec_src)) | |
748 | ; | |
749 | else if (starts_with(spec_src, "refs/") || | |
750 | starts_with(spec_src, "tags/") || | |
751 | starts_with(spec_src, "remotes/")) | |
752 | spec_src = ""; | |
753 | ||
754 | if (*spec_src) { | |
755 | if (!strcmp(remote, ".")) | |
756 | merge_branch = mkpath("refs/heads/%s", spec_src); | |
757 | else | |
758 | merge_branch = mkpath("refs/remotes/%s/%s", remote, spec_src); | |
759 | } else | |
760 | merge_branch = NULL; | |
761 | ||
895d3912 | 762 | refspec_item_clear(&spec); |
1678b81e PT |
763 | return merge_branch; |
764 | } | |
765 | ||
766 | /** | |
767 | * Given the repo and refspecs, sets fork_point to the point at which the | |
30aa96cd | 768 | * current branch forked from its remote-tracking branch. Returns 0 on success, |
1678b81e PT |
769 | * -1 on failure. |
770 | */ | |
f9b11147 | 771 | static int get_rebase_fork_point(struct object_id *fork_point, const char *repo, |
1678b81e PT |
772 | const char *refspec) |
773 | { | |
774 | int ret; | |
775 | struct branch *curr_branch; | |
776 | const char *remote_branch; | |
777 | struct child_process cp = CHILD_PROCESS_INIT; | |
778 | struct strbuf sb = STRBUF_INIT; | |
779 | ||
780 | curr_branch = branch_get("HEAD"); | |
781 | if (!curr_branch) | |
782 | return -1; | |
783 | ||
784 | if (refspec) | |
785 | remote_branch = get_tracking_branch(repo, refspec); | |
786 | else | |
787 | remote_branch = get_upstream_branch(repo); | |
788 | ||
789 | if (!remote_branch) | |
790 | return -1; | |
791 | ||
22f9b7f3 | 792 | strvec_pushl(&cp.args, "merge-base", "--fork-point", |
f6d8942b | 793 | remote_branch, curr_branch->name, NULL); |
1678b81e PT |
794 | cp.no_stdin = 1; |
795 | cp.no_stderr = 1; | |
796 | cp.git_cmd = 1; | |
797 | ||
fbfc089d | 798 | ret = capture_command(&cp, &sb, GIT_MAX_HEXSZ); |
1678b81e PT |
799 | if (ret) |
800 | goto cleanup; | |
801 | ||
f9b11147 | 802 | ret = get_oid_hex(sb.buf, fork_point); |
1678b81e PT |
803 | if (ret) |
804 | goto cleanup; | |
805 | ||
806 | cleanup: | |
807 | strbuf_release(&sb); | |
808 | return ret ? -1 : 0; | |
809 | } | |
810 | ||
811 | /** | |
812 | * Sets merge_base to the octopus merge base of curr_head, merge_head and | |
813 | * fork_point. Returns 0 if a merge base is found, 1 otherwise. | |
814 | */ | |
f9b11147 | 815 | static int get_octopus_merge_base(struct object_id *merge_base, |
816 | const struct object_id *curr_head, | |
ee3051bd | 817 | const struct object_id *merge_head, |
f9b11147 | 818 | const struct object_id *fork_point) |
1678b81e PT |
819 | { |
820 | struct commit_list *revs = NULL, *result; | |
821 | ||
2122f675 SB |
822 | commit_list_insert(lookup_commit_reference(the_repository, curr_head), |
823 | &revs); | |
824 | commit_list_insert(lookup_commit_reference(the_repository, merge_head), | |
825 | &revs); | |
f9b11147 | 826 | if (!is_null_oid(fork_point)) |
2122f675 SB |
827 | commit_list_insert(lookup_commit_reference(the_repository, fork_point), |
828 | &revs); | |
1678b81e | 829 | |
4da72644 | 830 | result = get_octopus_merge_bases(revs); |
1678b81e | 831 | free_commit_list(revs); |
4da72644 MÅ |
832 | reduce_heads_replace(&result); |
833 | ||
1678b81e PT |
834 | if (!result) |
835 | return 1; | |
836 | ||
f9b11147 | 837 | oidcpy(merge_base, &result->item->object.oid); |
4da72644 | 838 | free_commit_list(result); |
1678b81e PT |
839 | return 0; |
840 | } | |
841 | ||
842 | /** | |
fbfc089d | 843 | * Given the current HEAD oid, the merge head returned from git-fetch and the |
4f66d79a PB |
844 | * fork point calculated by get_rebase_fork_point(), compute the <newbase> and |
845 | * <upstream> arguments to use for the upcoming git-rebase invocation. | |
1678b81e | 846 | */ |
4f66d79a PB |
847 | static int get_rebase_newbase_and_upstream(struct object_id *newbase, |
848 | struct object_id *upstream, | |
849 | const struct object_id *curr_head, | |
ee3051bd | 850 | const struct object_id *merge_head, |
f9b11147 | 851 | const struct object_id *fork_point) |
1678b81e | 852 | { |
f9b11147 | 853 | struct object_id oct_merge_base; |
1678b81e | 854 | |
f9b11147 | 855 | if (!get_octopus_merge_base(&oct_merge_base, curr_head, merge_head, fork_point)) |
4a7e27e9 | 856 | if (!is_null_oid(fork_point) && oideq(&oct_merge_base, fork_point)) |
1678b81e PT |
857 | fork_point = NULL; |
858 | ||
4f66d79a PB |
859 | if (fork_point && !is_null_oid(fork_point)) |
860 | oidcpy(upstream, fork_point); | |
861 | else | |
862 | oidcpy(upstream, merge_head); | |
863 | ||
864 | oidcpy(newbase, merge_head); | |
865 | ||
866 | return 0; | |
867 | } | |
868 | ||
869 | /** | |
870 | * Given the <newbase> and <upstream> calculated by | |
871 | * get_rebase_newbase_and_upstream(), runs git-rebase with the | |
872 | * appropriate arguments and returns its exit status. | |
873 | */ | |
874 | static int run_rebase(const struct object_id *newbase, | |
875 | const struct object_id *upstream) | |
876 | { | |
0e906739 | 877 | struct child_process cmd = CHILD_PROCESS_INIT; |
4f66d79a | 878 | |
0e906739 | 879 | strvec_push(&cmd.args, "rebase"); |
1678b81e PT |
880 | |
881 | /* Shared options */ | |
0e906739 | 882 | argv_push_verbosity(&cmd.args); |
1678b81e PT |
883 | |
884 | /* Options passed to git-rebase */ | |
1131ec98 | 885 | if (opt_rebase == REBASE_MERGES) |
0e906739 | 886 | strvec_push(&cmd.args, "--rebase-merges"); |
f5eb87b9 | 887 | else if (opt_rebase == REBASE_INTERACTIVE) |
0e906739 | 888 | strvec_push(&cmd.args, "--interactive"); |
1678b81e | 889 | if (opt_diffstat) |
0e906739 RS |
890 | strvec_push(&cmd.args, opt_diffstat); |
891 | strvec_pushv(&cmd.args, opt_strategies.v); | |
892 | strvec_pushv(&cmd.args, opt_strategy_opts.v); | |
1678b81e | 893 | if (opt_gpg_sign) |
0e906739 | 894 | strvec_push(&cmd.args, opt_gpg_sign); |
359ff693 | 895 | if (opt_signoff) |
0e906739 | 896 | strvec_push(&cmd.args, opt_signoff); |
f66398eb | 897 | if (opt_autostash == 0) |
0e906739 | 898 | strvec_push(&cmd.args, "--no-autostash"); |
f66398eb | 899 | else if (opt_autostash == 1) |
0e906739 | 900 | strvec_push(&cmd.args, "--autostash"); |
c57e501c AH |
901 | if (opt_verify_signatures && |
902 | !strcmp(opt_verify_signatures, "--verify-signatures")) | |
903 | warning(_("ignoring --verify-signatures for rebase")); | |
1678b81e | 904 | |
0e906739 RS |
905 | strvec_push(&cmd.args, "--onto"); |
906 | strvec_push(&cmd.args, oid_to_hex(newbase)); | |
1678b81e | 907 | |
0e906739 | 908 | strvec_push(&cmd.args, oid_to_hex(upstream)); |
1678b81e | 909 | |
0e906739 RS |
910 | cmd.git_cmd = 1; |
911 | return run_command(&cmd); | |
1678b81e PT |
912 | } |
913 | ||
6f843a33 EN |
914 | static int get_can_ff(struct object_id *orig_head, |
915 | struct oid_array *merge_heads) | |
77a7ec63 FC |
916 | { |
917 | int ret; | |
918 | struct commit_list *list = NULL; | |
919 | struct commit *merge_head, *head; | |
6f843a33 | 920 | struct object_id *orig_merge_head; |
77a7ec63 | 921 | |
6f843a33 EN |
922 | if (merge_heads->nr > 1) |
923 | return 0; | |
924 | ||
925 | orig_merge_head = &merge_heads->oid[0]; | |
77a7ec63 FC |
926 | head = lookup_commit_reference(the_repository, orig_head); |
927 | commit_list_insert(head, &list); | |
928 | merge_head = lookup_commit_reference(the_repository, orig_merge_head); | |
929 | ret = repo_is_descendant_of(the_repository, merge_head, list); | |
930 | free_commit_list(list); | |
931 | return ret; | |
932 | } | |
933 | ||
361cb523 JH |
934 | /* |
935 | * Is orig_head a descendant of _all_ merge_heads? | |
936 | * Unfortunately is_descendant_of() cannot be used as it asks | |
937 | * if orig_head is a descendant of at least one of them. | |
938 | */ | |
939 | static int already_up_to_date(struct object_id *orig_head, | |
940 | struct oid_array *merge_heads) | |
941 | { | |
942 | int i; | |
943 | struct commit *ours; | |
944 | ||
945 | ours = lookup_commit_reference(the_repository, orig_head); | |
946 | for (i = 0; i < merge_heads->nr; i++) { | |
947 | struct commit_list *list = NULL; | |
948 | struct commit *theirs; | |
949 | int ok; | |
950 | ||
951 | theirs = lookup_commit_reference(the_repository, &merge_heads->oid[i]); | |
952 | commit_list_insert(theirs, &list); | |
953 | ok = repo_is_descendant_of(the_repository, ours, list); | |
954 | free_commit_list(list); | |
955 | if (!ok) | |
956 | return 0; | |
957 | } | |
958 | return 1; | |
959 | } | |
960 | ||
7539fdc6 JH |
961 | static void show_advice_pull_non_ff(void) |
962 | { | |
031e2f7a EN |
963 | advise(_("You have divergent branches and need to specify how to reconcile them.\n" |
964 | "You can do so by running one of the following commands sometime before\n" | |
965 | "your next pull:\n" | |
7539fdc6 | 966 | "\n" |
71076d0e | 967 | " git config pull.rebase false # merge\n" |
7539fdc6 JH |
968 | " git config pull.rebase true # rebase\n" |
969 | " git config pull.ff only # fast-forward only\n" | |
970 | "\n" | |
971 | "You can replace \"git config\" with \"git config --global\" to set a default\n" | |
972 | "preference for all repositories. You can also pass --rebase, --no-rebase,\n" | |
973 | "or --ff-only on the command line to override the configured default per\n" | |
974 | "invocation.\n")); | |
975 | } | |
976 | ||
1e1ea69f PT |
977 | int cmd_pull(int argc, const char **argv, const char *prefix) |
978 | { | |
f2c5baa1 | 979 | const char *repo, **refspecs; |
910650d2 | 980 | struct oid_array merge_heads = OID_ARRAY_INIT; |
f9b11147 | 981 | struct object_id orig_head, curr_head; |
982 | struct object_id rebase_fork_point; | |
b044db91 | 983 | int rebase_unspecified = 0; |
c525de33 | 984 | int can_ff; |
ea1954af | 985 | int divergent; |
ece3974b | 986 | int ret; |
f2c5baa1 | 987 | |
41fca098 PT |
988 | if (!getenv("GIT_REFLOG_ACTION")) |
989 | set_reflog_message(argc, argv); | |
990 | ||
cad0c692 | 991 | git_config(git_pull_config, NULL); |
059fda19 JS |
992 | if (the_repository->gitdir) { |
993 | prepare_repo_settings(the_repository); | |
994 | the_repository->settings.command_requires_full_index = 0; | |
995 | } | |
cad0c692 | 996 | |
1e1ea69f PT |
997 | argc = parse_options(argc, argv, prefix, pull_options, pull_usage, 0); |
998 | ||
58194173 GC |
999 | if (recurse_submodules_cli != RECURSE_SUBMODULES_DEFAULT) |
1000 | recurse_submodules = recurse_submodules_cli; | |
1001 | ||
d540b70c DL |
1002 | if (cleanup_arg) |
1003 | /* | |
1004 | * this only checks the validity of cleanup_arg; we don't need | |
1005 | * a valid value for use_editor | |
1006 | */ | |
1007 | get_cleanup_mode(cleanup_arg, 0); | |
1008 | ||
f2c5baa1 PT |
1009 | parse_repo_refspecs(argc, argv, &repo, &refspecs); |
1010 | ||
adc27d6a | 1011 | if (!opt_ff) { |
a9de9897 | 1012 | opt_ff = xstrdup_or_null(config_get_ff()); |
adc27d6a EN |
1013 | /* |
1014 | * A subtle point: opt_ff was set on the line above via | |
1015 | * reading from config. opt_rebase, in contrast, is set | |
1016 | * before this point via command line options. The setting | |
1017 | * of opt_rebase via reading from config (using | |
1018 | * config_get_rebase()) does not happen until later. We | |
1019 | * are relying on the next if-condition happening before | |
1020 | * the config_get_rebase() call so that an explicit | |
1021 | * "--rebase" can override a config setting of | |
1022 | * pull.ff=only. | |
1023 | */ | |
1024 | if (opt_rebase >= 0 && opt_ff && !strcmp(opt_ff, "--ff-only")) | |
1025 | opt_ff = "--ff"; | |
1026 | } | |
a9de9897 | 1027 | |
81dbd768 | 1028 | if (opt_rebase < 0) |
b044db91 | 1029 | opt_rebase = config_get_rebase(&rebase_unspecified); |
81dbd768 | 1030 | |
fbc1ed62 | 1031 | if (repo_read_index_unmerged(the_repository)) |
8785c425 | 1032 | die_resolve_conflict("pull"); |
4a4cf9e8 | 1033 | |
102de880 | 1034 | if (file_exists(git_path_merge_head(the_repository))) |
4a4cf9e8 PT |
1035 | die_conclude_merge(); |
1036 | ||
d850b7a5 | 1037 | if (repo_get_oid(the_repository, "HEAD", &orig_head)) |
f9b11147 | 1038 | oidclr(&orig_head); |
fe911b8c | 1039 | |
8944969c | 1040 | if (opt_rebase) { |
3013d98d PB |
1041 | if (opt_autostash == -1) |
1042 | opt_autostash = config_autostash; | |
53c76dc0 | 1043 | |
fbc1ed62 | 1044 | if (is_null_oid(&orig_head) && !is_index_unborn(&the_index)) |
8944969c PT |
1045 | die(_("Updating an unborn branch with changes added to the index.")); |
1046 | ||
3013d98d | 1047 | if (!opt_autostash) |
5b02ca38 NTND |
1048 | require_clean_work_tree(the_repository, |
1049 | N_("pull with rebase"), | |
d8cc92ab | 1050 | _("please commit or stash them."), 1, 0); |
8944969c | 1051 | |
f9b11147 | 1052 | if (get_rebase_fork_point(&rebase_fork_point, repo, *refspecs)) |
1053 | oidclr(&rebase_fork_point); | |
8944969c | 1054 | } |
1678b81e | 1055 | |
f2c5baa1 PT |
1056 | if (run_fetch(repo, refspecs)) |
1057 | return 1; | |
1058 | ||
a32975f5 PT |
1059 | if (opt_dry_run) |
1060 | return 0; | |
1061 | ||
d850b7a5 | 1062 | if (repo_get_oid(the_repository, "HEAD", &curr_head)) |
f9b11147 | 1063 | oidclr(&curr_head); |
fe911b8c | 1064 | |
f9b11147 | 1065 | if (!is_null_oid(&orig_head) && !is_null_oid(&curr_head) && |
9001dc2a | 1066 | !oideq(&orig_head, &curr_head)) { |
fe911b8c PT |
1067 | /* |
1068 | * The fetch involved updating the current branch. | |
1069 | * | |
1070 | * The working tree and the index file are still based on | |
1071 | * orig_head commit, but we are merging into curr_head. | |
1072 | * Update the working tree to match curr_head. | |
1073 | */ | |
1074 | ||
1075 | warning(_("fetch updated the current branch head.\n" | |
1076 | "fast-forwarding your working tree from\n" | |
f9b11147 | 1077 | "commit %s."), oid_to_hex(&orig_head)); |
fe911b8c | 1078 | |
7e196c3a NTND |
1079 | if (checkout_fast_forward(the_repository, &orig_head, |
1080 | &curr_head, 0)) | |
fe911b8c PT |
1081 | die(_("Cannot fast-forward your working tree.\n" |
1082 | "After making sure that you saved anything precious from\n" | |
1083 | "$ git diff %s\n" | |
1084 | "output, run\n" | |
1085 | "$ git reset --hard\n" | |
f9b11147 | 1086 | "to recover."), oid_to_hex(&orig_head)); |
fe911b8c PT |
1087 | } |
1088 | ||
44c175c7 PT |
1089 | get_merge_heads(&merge_heads); |
1090 | ||
1091 | if (!merge_heads.nr) | |
1092 | die_no_merge_candidates(repo, refspecs); | |
1093 | ||
f9b11147 | 1094 | if (is_null_oid(&orig_head)) { |
49ec402d PT |
1095 | if (merge_heads.nr > 1) |
1096 | die(_("Cannot merge multiple branches into empty head.")); | |
ece3974b ÆAB |
1097 | ret = pull_into_void(merge_heads.oid, &curr_head); |
1098 | goto cleanup; | |
33b842a1 | 1099 | } |
6f843a33 EN |
1100 | if (merge_heads.nr > 1) { |
1101 | if (opt_rebase) | |
1102 | die(_("Cannot rebase onto multiple branches.")); | |
1103 | if (opt_ff && !strcmp(opt_ff, "--ff-only")) | |
1104 | die(_("Cannot fast-forward to multiple branches.")); | |
1105 | } | |
33b842a1 | 1106 | |
6f843a33 | 1107 | can_ff = get_can_ff(&orig_head, &merge_heads); |
ea1954af | 1108 | divergent = !can_ff && !already_up_to_date(&orig_head, &merge_heads); |
c525de33 | 1109 | |
e4dc25ed EN |
1110 | /* ff-only takes precedence over rebase */ |
1111 | if (opt_ff && !strcmp(opt_ff, "--ff-only")) { | |
ea1954af | 1112 | if (divergent) |
e4dc25ed EN |
1113 | die_ff_impossible(); |
1114 | opt_rebase = REBASE_FALSE; | |
278f4be8 | 1115 | } |
e4dc25ed | 1116 | /* If no action specified and we can't fast forward, then warn. */ |
ea1954af | 1117 | if (!opt_ff && rebase_unspecified && divergent) { |
e4dc25ed | 1118 | show_advice_pull_non_ff(); |
031e2f7a EN |
1119 | die(_("Need to specify how to reconcile divergent branches.")); |
1120 | } | |
278f4be8 | 1121 | |
33b842a1 | 1122 | if (opt_rebase) { |
4f66d79a PB |
1123 | struct object_id newbase; |
1124 | struct object_id upstream; | |
1125 | get_rebase_newbase_and_upstream(&newbase, &upstream, &curr_head, | |
1126 | merge_heads.oid, &rebase_fork_point); | |
1127 | ||
a6d7eb2c SB |
1128 | if ((recurse_submodules == RECURSE_SUBMODULES_ON || |
1129 | recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND) && | |
5176f20f | 1130 | submodule_touches_in_range(the_repository, &upstream, &curr_head)) |
a6d7eb2c | 1131 | die(_("cannot rebase with locally recorded submodule modifications")); |
34006224 FC |
1132 | |
1133 | if (can_ff) { | |
1134 | /* we can fast-forward this without invoking rebase */ | |
1135 | opt_ff = "--ff-only"; | |
34006224 | 1136 | ret = run_merge(); |
a751e029 | 1137 | } else { |
4f66d79a | 1138 | ret = run_rebase(&newbase, &upstream); |
a751e029 | 1139 | } |
a6d7eb2c SB |
1140 | |
1141 | if (!ret && (recurse_submodules == RECURSE_SUBMODULES_ON || | |
1142 | recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)) | |
1143 | ret = rebase_submodules(); | |
1144 | ||
ece3974b | 1145 | goto cleanup; |
33b842a1 | 1146 | } else { |
ece3974b | 1147 | ret = run_merge(); |
a6d7eb2c SB |
1148 | if (!ret && (recurse_submodules == RECURSE_SUBMODULES_ON || |
1149 | recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)) | |
1150 | ret = update_submodules(); | |
ece3974b | 1151 | goto cleanup; |
33b842a1 | 1152 | } |
ece3974b ÆAB |
1153 | |
1154 | cleanup: | |
1155 | oid_array_clear(&merge_heads); | |
1156 | return ret; | |
1e1ea69f | 1157 | } |