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Commit | Line | Data |
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d6b64ed0 | 1 | #include "builtin.h" |
bd321bcc JS |
2 | #include "cache.h" |
3 | #include "commit.h" | |
4 | #include "tag.h" | |
5 | #include "refs.h" | |
edefb1a2 | 6 | #include "parse-options.h" |
b23e0b93 | 7 | #include "sha1-lookup.h" |
bd321bcc | 8 | |
c075aea5 JH |
9 | #define CUTOFF_DATE_SLOP 86400 /* one day */ |
10 | ||
bd321bcc JS |
11 | typedef struct rev_name { |
12 | const char *tip_name; | |
bd321bcc | 13 | int generation; |
ac076c29 | 14 | int distance; |
bd321bcc JS |
15 | } rev_name; |
16 | ||
17 | static long cutoff = LONG_MAX; | |
18 | ||
ac076c29 JS |
19 | /* How many generations are maximally preferred over _one_ merge traversal? */ |
20 | #define MERGE_TRAVERSAL_WEIGHT 65535 | |
21 | ||
bd321bcc | 22 | static void name_rev(struct commit *commit, |
ac076c29 | 23 | const char *tip_name, int generation, int distance, |
bd321bcc JS |
24 | int deref) |
25 | { | |
d3ff6f55 | 26 | struct rev_name *name = (struct rev_name *)commit->util; |
bd321bcc | 27 | struct commit_list *parents; |
f2e6f1c9 | 28 | int parent_number = 1; |
bd321bcc JS |
29 | |
30 | if (!commit->object.parsed) | |
31 | parse_commit(commit); | |
32 | ||
33 | if (commit->date < cutoff) | |
34 | return; | |
35 | ||
36 | if (deref) { | |
37 | char *new_name = xmalloc(strlen(tip_name)+3); | |
38 | strcpy(new_name, tip_name); | |
39 | strcat(new_name, "^0"); | |
40 | tip_name = new_name; | |
41 | ||
42 | if (generation) | |
43 | die("generation: %d, but deref?", generation); | |
44 | } | |
45 | ||
46 | if (name == NULL) { | |
47 | name = xmalloc(sizeof(rev_name)); | |
d3ff6f55 | 48 | commit->util = name; |
bd321bcc | 49 | goto copy_data; |
ac076c29 | 50 | } else if (name->distance > distance) { |
bd321bcc JS |
51 | copy_data: |
52 | name->tip_name = tip_name; | |
bd321bcc | 53 | name->generation = generation; |
ac076c29 | 54 | name->distance = distance; |
bd321bcc JS |
55 | } else |
56 | return; | |
57 | ||
58 | for (parents = commit->parents; | |
59 | parents; | |
60 | parents = parents->next, parent_number++) { | |
f2e6f1c9 | 61 | if (parent_number > 1) { |
59d3f541 | 62 | int len = strlen(tip_name); |
cf606e3d AW |
63 | char *new_name = xmalloc(len + |
64 | 1 + decimal_length(generation) + /* ~<n> */ | |
65 | 1 + 2 + /* ^NN */ | |
66 | 1); | |
bd321bcc | 67 | |
59d3f541 JS |
68 | if (len > 2 && !strcmp(tip_name + len - 2, "^0")) |
69 | len -= 2; | |
bd321bcc | 70 | if (generation > 0) |
59d3f541 | 71 | sprintf(new_name, "%.*s~%d^%d", len, tip_name, |
bd321bcc JS |
72 | generation, parent_number); |
73 | else | |
59d3f541 JS |
74 | sprintf(new_name, "%.*s^%d", len, tip_name, |
75 | parent_number); | |
bd321bcc | 76 | |
ac076c29 JS |
77 | name_rev(parents->item, new_name, 0, |
78 | distance + MERGE_TRAVERSAL_WEIGHT, 0); | |
bd321bcc | 79 | } else { |
ac076c29 JS |
80 | name_rev(parents->item, tip_name, generation + 1, |
81 | distance + 1, 0); | |
bd321bcc JS |
82 | } |
83 | } | |
84 | } | |
85 | ||
98c5c4ad NK |
86 | static int subpath_matches(const char *path, const char *filter) |
87 | { | |
88 | const char *subpath = path; | |
89 | ||
90 | while (subpath) { | |
91 | if (!fnmatch(filter, subpath, 0)) | |
92 | return subpath - path; | |
93 | subpath = strchr(subpath, '/'); | |
94 | if (subpath) | |
95 | subpath++; | |
96 | } | |
97 | return -1; | |
98 | } | |
99 | ||
9608a190 JH |
100 | static const char *name_ref_abbrev(const char *refname, int shorten_unambiguous) |
101 | { | |
102 | if (shorten_unambiguous) | |
103 | refname = shorten_unambiguous_ref(refname, 0); | |
104 | else if (!prefixcmp(refname, "refs/heads/")) | |
105 | refname = refname + 11; | |
106 | else if (!prefixcmp(refname, "refs/")) | |
107 | refname = refname + 5; | |
108 | return refname; | |
109 | } | |
110 | ||
2afc29aa JS |
111 | struct name_ref_data { |
112 | int tags_only; | |
23615708 | 113 | int name_only; |
2afc29aa JS |
114 | const char *ref_filter; |
115 | }; | |
116 | ||
b23e0b93 JH |
117 | static struct tip_table { |
118 | struct tip_table_entry { | |
119 | unsigned char sha1[20]; | |
120 | const char *refname; | |
121 | } *table; | |
122 | int nr; | |
123 | int alloc; | |
124 | int sorted; | |
125 | } tip_table; | |
126 | ||
127 | static void add_to_tip_table(const unsigned char *sha1, const char *refname, | |
128 | int shorten_unambiguous) | |
129 | { | |
130 | refname = name_ref_abbrev(refname, shorten_unambiguous); | |
131 | ||
132 | ALLOC_GROW(tip_table.table, tip_table.nr + 1, tip_table.alloc); | |
133 | hashcpy(tip_table.table[tip_table.nr].sha1, sha1); | |
134 | tip_table.table[tip_table.nr].refname = xstrdup(refname); | |
135 | tip_table.nr++; | |
136 | tip_table.sorted = 0; | |
137 | } | |
138 | ||
139 | static int tipcmp(const void *a_, const void *b_) | |
140 | { | |
141 | const struct tip_table_entry *a = a_, *b = b_; | |
142 | return hashcmp(a->sha1, b->sha1); | |
143 | } | |
144 | ||
8da19775 | 145 | static int name_ref(const char *path, const unsigned char *sha1, int flags, void *cb_data) |
bd321bcc JS |
146 | { |
147 | struct object *o = parse_object(sha1); | |
2afc29aa | 148 | struct name_ref_data *data = cb_data; |
98c5c4ad | 149 | int can_abbreviate_output = data->tags_only && data->name_only; |
bd321bcc JS |
150 | int deref = 0; |
151 | ||
cc44c765 | 152 | if (data->tags_only && prefixcmp(path, "refs/tags/")) |
2afc29aa JS |
153 | return 0; |
154 | ||
98c5c4ad NK |
155 | if (data->ref_filter) { |
156 | switch (subpath_matches(path, data->ref_filter)) { | |
157 | case -1: /* did not match */ | |
158 | return 0; | |
159 | case 0: /* matched fully */ | |
160 | break; | |
161 | default: /* matched subpath */ | |
162 | can_abbreviate_output = 1; | |
163 | break; | |
164 | } | |
165 | } | |
bd321bcc | 166 | |
b23e0b93 JH |
167 | add_to_tip_table(sha1, path, can_abbreviate_output); |
168 | ||
1974632c | 169 | while (o && o->type == OBJ_TAG) { |
bd321bcc JS |
170 | struct tag *t = (struct tag *) o; |
171 | if (!t->tagged) | |
172 | break; /* broken repository */ | |
173 | o = parse_object(t->tagged->sha1); | |
174 | deref = 1; | |
175 | } | |
1974632c | 176 | if (o && o->type == OBJ_COMMIT) { |
bd321bcc | 177 | struct commit *commit = (struct commit *)o; |
bd321bcc | 178 | |
9608a190 | 179 | path = name_ref_abbrev(path, can_abbreviate_output); |
9befac47 | 180 | name_rev(commit, xstrdup(path), 0, 0, deref); |
bd321bcc JS |
181 | } |
182 | return 0; | |
183 | } | |
184 | ||
b23e0b93 JH |
185 | static const unsigned char *nth_tip_table_ent(size_t ix, void *table_) |
186 | { | |
187 | struct tip_table_entry *table = table_; | |
188 | return table[ix].sha1; | |
189 | } | |
190 | ||
191 | static const char *get_exact_ref_match(const struct object *o) | |
192 | { | |
193 | int found; | |
194 | ||
195 | if (!tip_table.table || !tip_table.nr) | |
196 | return NULL; | |
197 | ||
198 | if (!tip_table.sorted) { | |
199 | qsort(tip_table.table, tip_table.nr, sizeof(*tip_table.table), | |
200 | tipcmp); | |
201 | tip_table.sorted = 1; | |
202 | } | |
203 | ||
204 | found = sha1_pos(o->sha1, tip_table.table, tip_table.nr, | |
205 | nth_tip_table_ent); | |
206 | if (0 <= found) | |
207 | return tip_table.table[found].refname; | |
208 | return NULL; | |
209 | } | |
210 | ||
bd321bcc | 211 | /* returns a static buffer */ |
da2478db | 212 | static const char *get_rev_name(const struct object *o) |
bd321bcc JS |
213 | { |
214 | static char buffer[1024]; | |
d3ff6f55 LT |
215 | struct rev_name *n; |
216 | struct commit *c; | |
217 | ||
1974632c | 218 | if (o->type != OBJ_COMMIT) |
b23e0b93 | 219 | return get_exact_ref_match(o); |
d3ff6f55 LT |
220 | c = (struct commit *) o; |
221 | n = c->util; | |
bd321bcc | 222 | if (!n) |
a2cf9f44 | 223 | return NULL; |
bd321bcc JS |
224 | |
225 | if (!n->generation) | |
226 | return n->tip_name; | |
59d3f541 JS |
227 | else { |
228 | int len = strlen(n->tip_name); | |
229 | if (len > 2 && !strcmp(n->tip_name + len - 2, "^0")) | |
230 | len -= 2; | |
231 | snprintf(buffer, sizeof(buffer), "%.*s~%d", len, n->tip_name, | |
232 | n->generation); | |
233 | ||
234 | return buffer; | |
235 | } | |
bd321bcc | 236 | } |
1f1e895f | 237 | |
da2478db JH |
238 | static void show_name(const struct object *obj, |
239 | const char *caller_name, | |
240 | int always, int allow_undefined, int name_only) | |
241 | { | |
242 | const char *name; | |
243 | const unsigned char *sha1 = obj->sha1; | |
244 | ||
245 | if (!name_only) | |
246 | printf("%s ", caller_name ? caller_name : sha1_to_hex(sha1)); | |
247 | name = get_rev_name(obj); | |
248 | if (name) | |
249 | printf("%s\n", name); | |
250 | else if (allow_undefined) | |
251 | printf("undefined\n"); | |
252 | else if (always) | |
253 | printf("%s\n", find_unique_abbrev(sha1, DEFAULT_ABBREV)); | |
254 | else | |
255 | die("cannot describe '%s'", sha1_to_hex(sha1)); | |
256 | } | |
257 | ||
edefb1a2 | 258 | static char const * const name_rev_usage[] = { |
422cad0a NTND |
259 | N_("git name-rev [options] <commit>..."), |
260 | N_("git name-rev [options] --all"), | |
261 | N_("git name-rev [options] --stdin"), | |
edefb1a2 PH |
262 | NULL |
263 | }; | |
264 | ||
e8b55fab JH |
265 | static void name_rev_line(char *p, struct name_ref_data *data) |
266 | { | |
267 | int forty = 0; | |
268 | char *p_start; | |
269 | for (p_start = p; *p; p++) { | |
270 | #define ishex(x) (isdigit((x)) || ((x) >= 'a' && (x) <= 'f')) | |
271 | if (!ishex(*p)) | |
272 | forty = 0; | |
273 | else if (++forty == 40 && | |
274 | !ishex(*(p+1))) { | |
275 | unsigned char sha1[40]; | |
276 | const char *name = NULL; | |
277 | char c = *(p+1); | |
7c5b1675 | 278 | int p_len = p - p_start + 1; |
e8b55fab JH |
279 | |
280 | forty = 0; | |
281 | ||
282 | *(p+1) = 0; | |
283 | if (!get_sha1(p - 39, sha1)) { | |
284 | struct object *o = | |
285 | lookup_object(sha1); | |
286 | if (o) | |
287 | name = get_rev_name(o); | |
288 | } | |
289 | *(p+1) = c; | |
290 | ||
291 | if (!name) | |
292 | continue; | |
293 | ||
7c5b1675 RS |
294 | if (data->name_only) |
295 | printf("%.*s%s", p_len - 40, p_start, name); | |
296 | else | |
297 | printf("%.*s (%s)", p_len, p_start, name); | |
e8b55fab JH |
298 | p_start = p + 1; |
299 | } | |
300 | } | |
301 | ||
302 | /* flush */ | |
303 | if (p_start != p) | |
304 | fwrite(p_start, p - p_start, 1, stdout); | |
305 | } | |
306 | ||
d6b64ed0 | 307 | int cmd_name_rev(int argc, const char **argv, const char *prefix) |
bd321bcc | 308 | { |
3cd47459 | 309 | struct object_array revs = OBJECT_ARRAY_INIT; |
adfc1857 | 310 | int all = 0, transform_stdin = 0, allow_undefined = 1, always = 0, peel_tag = 0; |
23615708 | 311 | struct name_ref_data data = { 0, 0, NULL }; |
edefb1a2 | 312 | struct option opts[] = { |
d5d09d47 SB |
313 | OPT_BOOL(0, "name-only", &data.name_only, N_("print only names (no SHA-1)")), |
314 | OPT_BOOL(0, "tags", &data.tags_only, N_("only use tags to name the commits")), | |
422cad0a NTND |
315 | OPT_STRING(0, "refs", &data.ref_filter, N_("pattern"), |
316 | N_("only use refs matching <pattern>")), | |
edefb1a2 | 317 | OPT_GROUP(""), |
d5d09d47 SB |
318 | OPT_BOOL(0, "all", &all, N_("list all commits reachable from all refs")), |
319 | OPT_BOOL(0, "stdin", &transform_stdin, N_("read from stdin")), | |
320 | OPT_BOOL(0, "undefined", &allow_undefined, N_("allow to print `undefined` names (default)")), | |
321 | OPT_BOOL(0, "always", &always, | |
422cad0a | 322 | N_("show abbreviated commit object as fallback")), |
adfc1857 JH |
323 | { |
324 | /* A Hidden OPT_BOOL */ | |
325 | OPTION_SET_INT, 0, "peel-tag", &peel_tag, NULL, | |
326 | N_("dereference tags in the input (internal use)"), | |
327 | PARSE_OPT_NOARG | PARSE_OPT_HIDDEN, NULL, 1, | |
328 | }, | |
edefb1a2 PH |
329 | OPT_END(), |
330 | }; | |
bd321bcc | 331 | |
ef90d6d4 | 332 | git_config(git_default_config, NULL); |
37782920 | 333 | argc = parse_options(argc, argv, prefix, opts, name_rev_usage, 0); |
edefb1a2 PH |
334 | if (!!all + !!transform_stdin + !!argc > 1) { |
335 | error("Specify either a list, or --all, not both!"); | |
336 | usage_with_options(name_rev_usage, opts); | |
337 | } | |
338 | if (all || transform_stdin) | |
339 | cutoff = 0; | |
bd321bcc | 340 | |
edefb1a2 | 341 | for (; argc; argc--, argv++) { |
bd321bcc | 342 | unsigned char sha1[20]; |
118aa4ac | 343 | struct object *object; |
bd321bcc JS |
344 | struct commit *commit; |
345 | ||
bd321bcc JS |
346 | if (get_sha1(*argv, sha1)) { |
347 | fprintf(stderr, "Could not get sha1 for %s. Skipping.\n", | |
348 | *argv); | |
349 | continue; | |
350 | } | |
351 | ||
118aa4ac JH |
352 | commit = NULL; |
353 | object = parse_object(sha1); | |
354 | if (object) { | |
355 | struct object *peeled = deref_tag(object, *argv, 0); | |
356 | if (peeled && peeled->type == OBJ_COMMIT) | |
357 | commit = (struct commit *)peeled; | |
358 | } | |
359 | ||
360 | if (!object) { | |
361 | fprintf(stderr, "Could not get object for %s. Skipping.\n", | |
bd321bcc JS |
362 | *argv); |
363 | continue; | |
364 | } | |
365 | ||
118aa4ac JH |
366 | if (commit) { |
367 | if (cutoff > commit->date) | |
368 | cutoff = commit->date; | |
369 | } | |
adfc1857 JH |
370 | |
371 | if (peel_tag) { | |
372 | if (!commit) { | |
373 | fprintf(stderr, "Could not get commit for %s. Skipping.\n", | |
374 | *argv); | |
375 | continue; | |
376 | } | |
377 | object = (struct object *)commit; | |
378 | } | |
118aa4ac | 379 | add_object_array(object, *argv, &revs); |
bd321bcc JS |
380 | } |
381 | ||
c075aea5 JH |
382 | if (cutoff) |
383 | cutoff = cutoff - CUTOFF_DATE_SLOP; | |
2afc29aa | 384 | for_each_ref(name_ref, &data); |
bd321bcc JS |
385 | |
386 | if (transform_stdin) { | |
387 | char buffer[2048]; | |
bd321bcc JS |
388 | |
389 | while (!feof(stdin)) { | |
e8b55fab | 390 | char *p = fgets(buffer, sizeof(buffer), stdin); |
bd321bcc JS |
391 | if (!p) |
392 | break; | |
e8b55fab | 393 | name_rev_line(p, &data); |
bd321bcc JS |
394 | } |
395 | } else if (all) { | |
fc046a75 | 396 | int i, max; |
bd321bcc | 397 | |
fc046a75 | 398 | max = get_max_object_index(); |
a83123de BS |
399 | for (i = 0; i < max; i++) { |
400 | struct object *obj = get_indexed_object(i); | |
e8b14d7e | 401 | if (!obj || obj->type != OBJ_COMMIT) |
a83123de BS |
402 | continue; |
403 | show_name(obj, NULL, | |
da2478db | 404 | always, allow_undefined, data.name_only); |
a83123de | 405 | } |
1f1e895f LT |
406 | } else { |
407 | int i; | |
da2478db JH |
408 | for (i = 0; i < revs.nr; i++) |
409 | show_name(revs.objects[i].item, revs.objects[i].name, | |
410 | always, allow_undefined, data.name_only); | |
1f1e895f | 411 | } |
bd321bcc JS |
412 | |
413 | return 0; | |
414 | } |