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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 | 29 | |
0064053b | 30 | parse_commit(commit); |
bd321bcc JS |
31 | |
32 | if (commit->date < cutoff) | |
33 | return; | |
34 | ||
35 | if (deref) { | |
36 | char *new_name = xmalloc(strlen(tip_name)+3); | |
37 | strcpy(new_name, tip_name); | |
38 | strcat(new_name, "^0"); | |
39 | tip_name = new_name; | |
40 | ||
41 | if (generation) | |
42 | die("generation: %d, but deref?", generation); | |
43 | } | |
44 | ||
45 | if (name == NULL) { | |
46 | name = xmalloc(sizeof(rev_name)); | |
d3ff6f55 | 47 | commit->util = name; |
bd321bcc | 48 | goto copy_data; |
ac076c29 | 49 | } else if (name->distance > distance) { |
bd321bcc JS |
50 | copy_data: |
51 | name->tip_name = tip_name; | |
bd321bcc | 52 | name->generation = generation; |
ac076c29 | 53 | name->distance = distance; |
bd321bcc JS |
54 | } else |
55 | return; | |
56 | ||
57 | for (parents = commit->parents; | |
58 | parents; | |
59 | parents = parents->next, parent_number++) { | |
f2e6f1c9 | 60 | if (parent_number > 1) { |
59d3f541 | 61 | int len = strlen(tip_name); |
cf606e3d AW |
62 | char *new_name = xmalloc(len + |
63 | 1 + decimal_length(generation) + /* ~<n> */ | |
64 | 1 + 2 + /* ^NN */ | |
65 | 1); | |
bd321bcc | 66 | |
59d3f541 JS |
67 | if (len > 2 && !strcmp(tip_name + len - 2, "^0")) |
68 | len -= 2; | |
bd321bcc | 69 | if (generation > 0) |
59d3f541 | 70 | sprintf(new_name, "%.*s~%d^%d", len, tip_name, |
bd321bcc JS |
71 | generation, parent_number); |
72 | else | |
59d3f541 JS |
73 | sprintf(new_name, "%.*s^%d", len, tip_name, |
74 | parent_number); | |
bd321bcc | 75 | |
ac076c29 JS |
76 | name_rev(parents->item, new_name, 0, |
77 | distance + MERGE_TRAVERSAL_WEIGHT, 0); | |
bd321bcc | 78 | } else { |
ac076c29 JS |
79 | name_rev(parents->item, tip_name, generation + 1, |
80 | distance + 1, 0); | |
bd321bcc JS |
81 | } |
82 | } | |
83 | } | |
84 | ||
98c5c4ad NK |
85 | static int subpath_matches(const char *path, const char *filter) |
86 | { | |
87 | const char *subpath = path; | |
88 | ||
89 | while (subpath) { | |
eb07894f | 90 | if (!wildmatch(filter, subpath, 0, NULL)) |
98c5c4ad NK |
91 | return subpath - path; |
92 | subpath = strchr(subpath, '/'); | |
93 | if (subpath) | |
94 | subpath++; | |
95 | } | |
96 | return -1; | |
97 | } | |
98 | ||
9608a190 JH |
99 | static const char *name_ref_abbrev(const char *refname, int shorten_unambiguous) |
100 | { | |
101 | if (shorten_unambiguous) | |
102 | refname = shorten_unambiguous_ref(refname, 0); | |
59556548 | 103 | else if (starts_with(refname, "refs/heads/")) |
9608a190 | 104 | refname = refname + 11; |
59556548 | 105 | else if (starts_with(refname, "refs/")) |
9608a190 JH |
106 | refname = refname + 5; |
107 | return refname; | |
108 | } | |
109 | ||
2afc29aa JS |
110 | struct name_ref_data { |
111 | int tags_only; | |
23615708 | 112 | int name_only; |
2afc29aa JS |
113 | const char *ref_filter; |
114 | }; | |
115 | ||
b23e0b93 JH |
116 | static struct tip_table { |
117 | struct tip_table_entry { | |
118 | unsigned char sha1[20]; | |
119 | const char *refname; | |
120 | } *table; | |
121 | int nr; | |
122 | int alloc; | |
123 | int sorted; | |
124 | } tip_table; | |
125 | ||
126 | static void add_to_tip_table(const unsigned char *sha1, const char *refname, | |
127 | int shorten_unambiguous) | |
128 | { | |
129 | refname = name_ref_abbrev(refname, shorten_unambiguous); | |
130 | ||
131 | ALLOC_GROW(tip_table.table, tip_table.nr + 1, tip_table.alloc); | |
132 | hashcpy(tip_table.table[tip_table.nr].sha1, sha1); | |
133 | tip_table.table[tip_table.nr].refname = xstrdup(refname); | |
134 | tip_table.nr++; | |
135 | tip_table.sorted = 0; | |
136 | } | |
137 | ||
138 | static int tipcmp(const void *a_, const void *b_) | |
139 | { | |
140 | const struct tip_table_entry *a = a_, *b = b_; | |
141 | return hashcmp(a->sha1, b->sha1); | |
142 | } | |
143 | ||
8da19775 | 144 | static int name_ref(const char *path, const unsigned char *sha1, int flags, void *cb_data) |
bd321bcc JS |
145 | { |
146 | struct object *o = parse_object(sha1); | |
2afc29aa | 147 | struct name_ref_data *data = cb_data; |
98c5c4ad | 148 | int can_abbreviate_output = data->tags_only && data->name_only; |
bd321bcc JS |
149 | int deref = 0; |
150 | ||
59556548 | 151 | if (data->tags_only && !starts_with(path, "refs/tags/")) |
2afc29aa JS |
152 | return 0; |
153 | ||
98c5c4ad NK |
154 | if (data->ref_filter) { |
155 | switch (subpath_matches(path, data->ref_filter)) { | |
156 | case -1: /* did not match */ | |
157 | return 0; | |
158 | case 0: /* matched fully */ | |
159 | break; | |
160 | default: /* matched subpath */ | |
161 | can_abbreviate_output = 1; | |
162 | break; | |
163 | } | |
164 | } | |
bd321bcc | 165 | |
b23e0b93 JH |
166 | add_to_tip_table(sha1, path, can_abbreviate_output); |
167 | ||
1974632c | 168 | while (o && o->type == OBJ_TAG) { |
bd321bcc JS |
169 | struct tag *t = (struct tag *) o; |
170 | if (!t->tagged) | |
171 | break; /* broken repository */ | |
172 | o = parse_object(t->tagged->sha1); | |
173 | deref = 1; | |
174 | } | |
1974632c | 175 | if (o && o->type == OBJ_COMMIT) { |
bd321bcc | 176 | struct commit *commit = (struct commit *)o; |
bd321bcc | 177 | |
9608a190 | 178 | path = name_ref_abbrev(path, can_abbreviate_output); |
9befac47 | 179 | name_rev(commit, xstrdup(path), 0, 0, deref); |
bd321bcc JS |
180 | } |
181 | return 0; | |
182 | } | |
183 | ||
b23e0b93 JH |
184 | static const unsigned char *nth_tip_table_ent(size_t ix, void *table_) |
185 | { | |
186 | struct tip_table_entry *table = table_; | |
187 | return table[ix].sha1; | |
188 | } | |
189 | ||
190 | static const char *get_exact_ref_match(const struct object *o) | |
191 | { | |
192 | int found; | |
193 | ||
194 | if (!tip_table.table || !tip_table.nr) | |
195 | return NULL; | |
196 | ||
197 | if (!tip_table.sorted) { | |
198 | qsort(tip_table.table, tip_table.nr, sizeof(*tip_table.table), | |
199 | tipcmp); | |
200 | tip_table.sorted = 1; | |
201 | } | |
202 | ||
203 | found = sha1_pos(o->sha1, tip_table.table, tip_table.nr, | |
204 | nth_tip_table_ent); | |
205 | if (0 <= found) | |
206 | return tip_table.table[found].refname; | |
207 | return NULL; | |
208 | } | |
209 | ||
bd321bcc | 210 | /* returns a static buffer */ |
da2478db | 211 | static const char *get_rev_name(const struct object *o) |
bd321bcc JS |
212 | { |
213 | static char buffer[1024]; | |
d3ff6f55 LT |
214 | struct rev_name *n; |
215 | struct commit *c; | |
216 | ||
1974632c | 217 | if (o->type != OBJ_COMMIT) |
b23e0b93 | 218 | return get_exact_ref_match(o); |
d3ff6f55 LT |
219 | c = (struct commit *) o; |
220 | n = c->util; | |
bd321bcc | 221 | if (!n) |
a2cf9f44 | 222 | return NULL; |
bd321bcc JS |
223 | |
224 | if (!n->generation) | |
225 | return n->tip_name; | |
59d3f541 JS |
226 | else { |
227 | int len = strlen(n->tip_name); | |
228 | if (len > 2 && !strcmp(n->tip_name + len - 2, "^0")) | |
229 | len -= 2; | |
230 | snprintf(buffer, sizeof(buffer), "%.*s~%d", len, n->tip_name, | |
231 | n->generation); | |
232 | ||
233 | return buffer; | |
234 | } | |
bd321bcc | 235 | } |
1f1e895f | 236 | |
da2478db JH |
237 | static void show_name(const struct object *obj, |
238 | const char *caller_name, | |
239 | int always, int allow_undefined, int name_only) | |
240 | { | |
241 | const char *name; | |
242 | const unsigned char *sha1 = obj->sha1; | |
243 | ||
244 | if (!name_only) | |
245 | printf("%s ", caller_name ? caller_name : sha1_to_hex(sha1)); | |
246 | name = get_rev_name(obj); | |
247 | if (name) | |
248 | printf("%s\n", name); | |
249 | else if (allow_undefined) | |
250 | printf("undefined\n"); | |
251 | else if (always) | |
252 | printf("%s\n", find_unique_abbrev(sha1, DEFAULT_ABBREV)); | |
253 | else | |
254 | die("cannot describe '%s'", sha1_to_hex(sha1)); | |
255 | } | |
256 | ||
edefb1a2 | 257 | static char const * const name_rev_usage[] = { |
422cad0a NTND |
258 | N_("git name-rev [options] <commit>..."), |
259 | N_("git name-rev [options] --all"), | |
260 | N_("git name-rev [options] --stdin"), | |
edefb1a2 PH |
261 | NULL |
262 | }; | |
263 | ||
e8b55fab JH |
264 | static void name_rev_line(char *p, struct name_ref_data *data) |
265 | { | |
266 | int forty = 0; | |
267 | char *p_start; | |
268 | for (p_start = p; *p; p++) { | |
269 | #define ishex(x) (isdigit((x)) || ((x) >= 'a' && (x) <= 'f')) | |
270 | if (!ishex(*p)) | |
271 | forty = 0; | |
272 | else if (++forty == 40 && | |
273 | !ishex(*(p+1))) { | |
274 | unsigned char sha1[40]; | |
275 | const char *name = NULL; | |
276 | char c = *(p+1); | |
7c5b1675 | 277 | int p_len = p - p_start + 1; |
e8b55fab JH |
278 | |
279 | forty = 0; | |
280 | ||
281 | *(p+1) = 0; | |
282 | if (!get_sha1(p - 39, sha1)) { | |
283 | struct object *o = | |
284 | lookup_object(sha1); | |
285 | if (o) | |
286 | name = get_rev_name(o); | |
287 | } | |
288 | *(p+1) = c; | |
289 | ||
290 | if (!name) | |
291 | continue; | |
292 | ||
7c5b1675 RS |
293 | if (data->name_only) |
294 | printf("%.*s%s", p_len - 40, p_start, name); | |
295 | else | |
296 | printf("%.*s (%s)", p_len, p_start, name); | |
e8b55fab JH |
297 | p_start = p + 1; |
298 | } | |
299 | } | |
300 | ||
301 | /* flush */ | |
302 | if (p_start != p) | |
303 | fwrite(p_start, p - p_start, 1, stdout); | |
304 | } | |
305 | ||
d6b64ed0 | 306 | int cmd_name_rev(int argc, const char **argv, const char *prefix) |
bd321bcc | 307 | { |
3cd47459 | 308 | struct object_array revs = OBJECT_ARRAY_INIT; |
adfc1857 | 309 | int all = 0, transform_stdin = 0, allow_undefined = 1, always = 0, peel_tag = 0; |
23615708 | 310 | struct name_ref_data data = { 0, 0, NULL }; |
edefb1a2 | 311 | struct option opts[] = { |
d5d09d47 SB |
312 | OPT_BOOL(0, "name-only", &data.name_only, N_("print only names (no SHA-1)")), |
313 | OPT_BOOL(0, "tags", &data.tags_only, N_("only use tags to name the commits")), | |
422cad0a NTND |
314 | OPT_STRING(0, "refs", &data.ref_filter, N_("pattern"), |
315 | N_("only use refs matching <pattern>")), | |
edefb1a2 | 316 | OPT_GROUP(""), |
d5d09d47 SB |
317 | OPT_BOOL(0, "all", &all, N_("list all commits reachable from all refs")), |
318 | OPT_BOOL(0, "stdin", &transform_stdin, N_("read from stdin")), | |
319 | OPT_BOOL(0, "undefined", &allow_undefined, N_("allow to print `undefined` names (default)")), | |
320 | OPT_BOOL(0, "always", &always, | |
422cad0a | 321 | N_("show abbreviated commit object as fallback")), |
adfc1857 JH |
322 | { |
323 | /* A Hidden OPT_BOOL */ | |
324 | OPTION_SET_INT, 0, "peel-tag", &peel_tag, NULL, | |
325 | N_("dereference tags in the input (internal use)"), | |
326 | PARSE_OPT_NOARG | PARSE_OPT_HIDDEN, NULL, 1, | |
327 | }, | |
edefb1a2 PH |
328 | OPT_END(), |
329 | }; | |
bd321bcc | 330 | |
ef90d6d4 | 331 | git_config(git_default_config, NULL); |
37782920 | 332 | argc = parse_options(argc, argv, prefix, opts, name_rev_usage, 0); |
05efb7b7 | 333 | if (all + transform_stdin + !!argc > 1) { |
edefb1a2 PH |
334 | error("Specify either a list, or --all, not both!"); |
335 | usage_with_options(name_rev_usage, opts); | |
336 | } | |
337 | if (all || transform_stdin) | |
338 | cutoff = 0; | |
bd321bcc | 339 | |
edefb1a2 | 340 | for (; argc; argc--, argv++) { |
bd321bcc | 341 | unsigned char sha1[20]; |
118aa4ac | 342 | struct object *object; |
bd321bcc JS |
343 | struct commit *commit; |
344 | ||
bd321bcc JS |
345 | if (get_sha1(*argv, sha1)) { |
346 | fprintf(stderr, "Could not get sha1 for %s. Skipping.\n", | |
347 | *argv); | |
348 | continue; | |
349 | } | |
350 | ||
118aa4ac JH |
351 | commit = NULL; |
352 | object = parse_object(sha1); | |
353 | if (object) { | |
354 | struct object *peeled = deref_tag(object, *argv, 0); | |
355 | if (peeled && peeled->type == OBJ_COMMIT) | |
356 | commit = (struct commit *)peeled; | |
357 | } | |
358 | ||
359 | if (!object) { | |
360 | fprintf(stderr, "Could not get object for %s. Skipping.\n", | |
bd321bcc JS |
361 | *argv); |
362 | continue; | |
363 | } | |
364 | ||
118aa4ac JH |
365 | if (commit) { |
366 | if (cutoff > commit->date) | |
367 | cutoff = commit->date; | |
368 | } | |
adfc1857 JH |
369 | |
370 | if (peel_tag) { | |
371 | if (!commit) { | |
372 | fprintf(stderr, "Could not get commit for %s. Skipping.\n", | |
373 | *argv); | |
374 | continue; | |
375 | } | |
376 | object = (struct object *)commit; | |
377 | } | |
118aa4ac | 378 | add_object_array(object, *argv, &revs); |
bd321bcc JS |
379 | } |
380 | ||
c075aea5 JH |
381 | if (cutoff) |
382 | cutoff = cutoff - CUTOFF_DATE_SLOP; | |
2afc29aa | 383 | for_each_ref(name_ref, &data); |
bd321bcc JS |
384 | |
385 | if (transform_stdin) { | |
386 | char buffer[2048]; | |
bd321bcc JS |
387 | |
388 | while (!feof(stdin)) { | |
e8b55fab | 389 | char *p = fgets(buffer, sizeof(buffer), stdin); |
bd321bcc JS |
390 | if (!p) |
391 | break; | |
e8b55fab | 392 | name_rev_line(p, &data); |
bd321bcc JS |
393 | } |
394 | } else if (all) { | |
fc046a75 | 395 | int i, max; |
bd321bcc | 396 | |
fc046a75 | 397 | max = get_max_object_index(); |
a83123de BS |
398 | for (i = 0; i < max; i++) { |
399 | struct object *obj = get_indexed_object(i); | |
e8b14d7e | 400 | if (!obj || obj->type != OBJ_COMMIT) |
a83123de BS |
401 | continue; |
402 | show_name(obj, NULL, | |
da2478db | 403 | always, allow_undefined, data.name_only); |
a83123de | 404 | } |
1f1e895f LT |
405 | } else { |
406 | int i; | |
da2478db JH |
407 | for (i = 0; i < revs.nr; i++) |
408 | show_name(revs.objects[i].item, revs.objects[i].name, | |
409 | always, allow_undefined, data.name_only); | |
1f1e895f | 410 | } |
bd321bcc JS |
411 | |
412 | return 0; | |
413 | } |