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Commit | Line | Data |
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e496c003 DB |
1 | #include "cache.h" |
2 | #include "branch.h" | |
3 | #include "refs.h" | |
4 | #include "remote.h" | |
5 | #include "commit.h" | |
6 | ||
7 | struct tracking { | |
8 | struct refspec spec; | |
9 | char *src; | |
10 | const char *remote; | |
11 | int matches; | |
12 | }; | |
13 | ||
14 | static int find_tracked_branch(struct remote *remote, void *priv) | |
15 | { | |
16 | struct tracking *tracking = priv; | |
17 | ||
18 | if (!remote_find_tracking(remote, &tracking->spec)) { | |
19 | if (++tracking->matches == 1) { | |
20 | tracking->src = tracking->spec.src; | |
21 | tracking->remote = remote->name; | |
22 | } else { | |
23 | free(tracking->spec.src); | |
24 | if (tracking->src) { | |
25 | free(tracking->src); | |
26 | tracking->src = NULL; | |
27 | } | |
28 | } | |
29 | tracking->spec.src = NULL; | |
30 | } | |
31 | ||
32 | return 0; | |
33 | } | |
34 | ||
a9f2c136 | 35 | static int should_setup_rebase(const char *origin) |
c998ae9b DS |
36 | { |
37 | switch (autorebase) { | |
38 | case AUTOREBASE_NEVER: | |
39 | return 0; | |
40 | case AUTOREBASE_LOCAL: | |
a9f2c136 | 41 | return origin == NULL; |
c998ae9b | 42 | case AUTOREBASE_REMOTE: |
a9f2c136 | 43 | return origin != NULL; |
c998ae9b DS |
44 | case AUTOREBASE_ALWAYS: |
45 | return 1; | |
46 | } | |
47 | return 0; | |
48 | } | |
49 | ||
a9f2c136 JH |
50 | void install_branch_config(int flag, const char *local, const char *origin, const char *remote) |
51 | { | |
85e2233f MM |
52 | const char *shortname = remote + 11; |
53 | int remote_is_branch = !prefixcmp(remote, "refs/heads/"); | |
a9f2c136 JH |
54 | struct strbuf key = STRBUF_INIT; |
55 | int rebasing = should_setup_rebase(origin); | |
56 | ||
85e2233f MM |
57 | if (remote_is_branch |
58 | && !strcmp(local, shortname) | |
59 | && !origin) { | |
60 | warning("Not setting branch %s as its own upstream.", | |
61 | local); | |
62 | return; | |
63 | } | |
64 | ||
a9f2c136 JH |
65 | strbuf_addf(&key, "branch.%s.remote", local); |
66 | git_config_set(key.buf, origin ? origin : "."); | |
67 | ||
68 | strbuf_reset(&key); | |
69 | strbuf_addf(&key, "branch.%s.merge", local); | |
70 | git_config_set(key.buf, remote); | |
71 | ||
72 | if (rebasing) { | |
73 | strbuf_reset(&key); | |
74 | strbuf_addf(&key, "branch.%s.rebase", local); | |
75 | git_config_set(key.buf, "true"); | |
76 | } | |
77 | ||
72f60083 JH |
78 | if (flag & BRANCH_CONFIG_VERBOSE) { |
79 | strbuf_reset(&key); | |
80 | ||
81 | strbuf_addstr(&key, origin ? "remote" : "local"); | |
82 | ||
83 | /* Are we tracking a proper "branch"? */ | |
85e2233f MM |
84 | if (remote_is_branch) { |
85 | strbuf_addf(&key, " branch %s", shortname); | |
72f60083 JH |
86 | if (origin) |
87 | strbuf_addf(&key, " from %s", origin); | |
88 | } | |
89 | else | |
90 | strbuf_addf(&key, " ref %s", remote); | |
91 | printf("Branch %s set up to track %s%s.\n", | |
92 | local, key.buf, | |
93 | rebasing ? " by rebasing" : ""); | |
94 | } | |
a9f2c136 JH |
95 | strbuf_release(&key); |
96 | } | |
97 | ||
e496c003 DB |
98 | /* |
99 | * This is called when new_ref is branched off of orig_ref, and tries | |
100 | * to infer the settings for branch.<new_ref>.{remote,merge} from the | |
101 | * config. | |
102 | */ | |
9ed36cfa JS |
103 | static int setup_tracking(const char *new_ref, const char *orig_ref, |
104 | enum branch_track track) | |
e496c003 | 105 | { |
e496c003 DB |
106 | struct tracking tracking; |
107 | ||
108 | if (strlen(new_ref) > 1024 - 7 - 7 - 1) | |
109 | return error("Tracking not set up: name too long: %s", | |
110 | new_ref); | |
111 | ||
112 | memset(&tracking, 0, sizeof(tracking)); | |
113 | tracking.spec.dst = (char *)orig_ref; | |
9ed36cfa | 114 | if (for_each_remote(find_tracked_branch, &tracking)) |
e496c003 DB |
115 | return 1; |
116 | ||
9ed36cfa JS |
117 | if (!tracking.matches) |
118 | switch (track) { | |
119 | case BRANCH_TRACK_ALWAYS: | |
120 | case BRANCH_TRACK_EXPLICIT: | |
4fc50066 | 121 | case BRANCH_TRACK_OVERRIDE: |
9ed36cfa JS |
122 | break; |
123 | default: | |
124 | return 1; | |
125 | } | |
126 | ||
e496c003 DB |
127 | if (tracking.matches > 1) |
128 | return error("Not tracking: ambiguous information for ref %s", | |
129 | orig_ref); | |
130 | ||
a9f2c136 JH |
131 | install_branch_config(BRANCH_CONFIG_VERBOSE, new_ref, tracking.remote, |
132 | tracking.src ? tracking.src : orig_ref); | |
e496c003 | 133 | |
a9f2c136 | 134 | free(tracking.src); |
e496c003 DB |
135 | return 0; |
136 | } | |
137 | ||
6f9a3321 JH |
138 | struct branch_desc_cb { |
139 | const char *config_name; | |
140 | const char *value; | |
141 | }; | |
142 | ||
143 | static int read_branch_desc_cb(const char *var, const char *value, void *cb) | |
144 | { | |
145 | struct branch_desc_cb *desc = cb; | |
146 | if (strcmp(desc->config_name, var)) | |
147 | return 0; | |
148 | free((char *)desc->value); | |
149 | return git_config_string(&desc->value, var, value); | |
150 | } | |
151 | ||
152 | int read_branch_desc(struct strbuf *buf, const char *branch_name) | |
153 | { | |
154 | struct branch_desc_cb cb; | |
155 | struct strbuf name = STRBUF_INIT; | |
156 | strbuf_addf(&name, "branch.%s.description", branch_name); | |
157 | cb.config_name = name.buf; | |
158 | cb.value = NULL; | |
159 | if (git_config(read_branch_desc_cb, &cb) < 0) { | |
160 | strbuf_release(&name); | |
161 | return -1; | |
162 | } | |
163 | if (cb.value) | |
164 | strbuf_addstr(buf, cb.value); | |
165 | strbuf_release(&name); | |
166 | return 0; | |
167 | } | |
168 | ||
fa799376 JH |
169 | int validate_new_branchname(const char *name, struct strbuf *ref, |
170 | int force, int attr_only) | |
55c4a673 | 171 | { |
55c4a673 CI |
172 | if (strbuf_check_branch_ref(ref, name)) |
173 | die("'%s' is not a valid branch name.", name); | |
174 | ||
175 | if (!ref_exists(ref->buf)) | |
176 | return 0; | |
fa799376 | 177 | else if (!force && !attr_only) |
587a9ee7 | 178 | die("A branch named '%s' already exists.", ref->buf + strlen("refs/heads/")); |
55c4a673 | 179 | |
fa799376 JH |
180 | if (!attr_only) { |
181 | const char *head; | |
182 | unsigned char sha1[20]; | |
55c4a673 | 183 | |
8cad4744 | 184 | head = resolve_ref_unsafe("HEAD", sha1, 0, NULL); |
fa799376 JH |
185 | if (!is_bare_repository() && head && !strcmp(head, ref->buf)) |
186 | die("Cannot force update the current branch."); | |
187 | } | |
55c4a673 CI |
188 | return 1; |
189 | } | |
190 | ||
e496c003 DB |
191 | void create_branch(const char *head, |
192 | const char *name, const char *start_name, | |
39bd6f72 JN |
193 | int force, int reflog, int clobber_head, |
194 | enum branch_track track) | |
e496c003 | 195 | { |
4fc50066 | 196 | struct ref_lock *lock = NULL; |
e496c003 DB |
197 | struct commit *commit; |
198 | unsigned char sha1[20]; | |
8415d5c7 JH |
199 | char *real_ref, msg[PATH_MAX + 20]; |
200 | struct strbuf ref = STRBUF_INIT; | |
e496c003 | 201 | int forcing = 0; |
4fc50066 IL |
202 | int dont_change_ref = 0; |
203 | int explicit_tracking = 0; | |
204 | ||
205 | if (track == BRANCH_TRACK_EXPLICIT || track == BRANCH_TRACK_OVERRIDE) | |
206 | explicit_tracking = 1; | |
e496c003 | 207 | |
fa799376 | 208 | if (validate_new_branchname(name, &ref, force, |
39bd6f72 JN |
209 | track == BRANCH_TRACK_OVERRIDE || |
210 | clobber_head)) { | |
55c4a673 | 211 | if (!force) |
4fc50066 | 212 | dont_change_ref = 1; |
55c4a673 CI |
213 | else |
214 | forcing = 1; | |
e496c003 DB |
215 | } |
216 | ||
217 | real_ref = NULL; | |
218 | if (get_sha1(start_name, sha1)) | |
219 | die("Not a valid object name: '%s'.", start_name); | |
220 | ||
221 | switch (dwim_ref(start_name, strlen(start_name), sha1, &real_ref)) { | |
222 | case 0: | |
223 | /* Not branching from any existing branch */ | |
4fc50066 | 224 | if (explicit_tracking) |
9ed36cfa | 225 | die("Cannot setup tracking information; starting point is not a branch."); |
e496c003 DB |
226 | break; |
227 | case 1: | |
21b5b1e8 JH |
228 | /* Unique completion -- good, only if it is a real branch */ |
229 | if (prefixcmp(real_ref, "refs/heads/") && | |
230 | prefixcmp(real_ref, "refs/remotes/")) { | |
231 | if (explicit_tracking) | |
232 | die("Cannot setup tracking information; starting point is not a branch."); | |
233 | else | |
234 | real_ref = NULL; | |
235 | } | |
e496c003 DB |
236 | break; |
237 | default: | |
238 | die("Ambiguous object name: '%s'.", start_name); | |
239 | break; | |
240 | } | |
241 | ||
242 | if ((commit = lookup_commit_reference(sha1)) == NULL) | |
243 | die("Not a valid branch point: '%s'.", start_name); | |
244 | hashcpy(sha1, commit->object.sha1); | |
245 | ||
4fc50066 IL |
246 | if (!dont_change_ref) { |
247 | lock = lock_any_ref_for_update(ref.buf, NULL, 0); | |
248 | if (!lock) | |
249 | die_errno("Failed to lock ref for update"); | |
250 | } | |
e496c003 DB |
251 | |
252 | if (reflog) | |
253 | log_all_ref_updates = 1; | |
254 | ||
255 | if (forcing) | |
da288e25 | 256 | snprintf(msg, sizeof msg, "branch: Reset to %s", |
e496c003 | 257 | start_name); |
4fc50066 | 258 | else if (!dont_change_ref) |
e496c003 DB |
259 | snprintf(msg, sizeof msg, "branch: Created from %s", |
260 | start_name); | |
261 | ||
e496c003 | 262 | if (real_ref && track) |
e9d4f740 | 263 | setup_tracking(ref.buf+11, real_ref, track); |
e496c003 | 264 | |
4fc50066 IL |
265 | if (!dont_change_ref) |
266 | if (write_ref_sha1(lock, sha1, msg) < 0) | |
267 | die_errno("Failed to write ref"); | |
e496c003 | 268 | |
8415d5c7 | 269 | strbuf_release(&ref); |
9ed36cfa | 270 | free(real_ref); |
e496c003 | 271 | } |
c369e7b8 DB |
272 | |
273 | void remove_branch_state(void) | |
274 | { | |
d7e5c0cb | 275 | unlink(git_path("CHERRY_PICK_HEAD")); |
82433cdf | 276 | unlink(git_path("REVERT_HEAD")); |
c369e7b8 | 277 | unlink(git_path("MERGE_HEAD")); |
0af0ac7e | 278 | unlink(git_path("MERGE_RR")); |
c369e7b8 | 279 | unlink(git_path("MERGE_MSG")); |
cf10f9fd | 280 | unlink(git_path("MERGE_MODE")); |
c369e7b8 DB |
281 | unlink(git_path("SQUASH_MSG")); |
282 | } |