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Commit | Line | Data |
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9938af6a | 1 | #include "cache.h" |
5385f52d | 2 | #include "tag.h" |
9938af6a | 3 | #include "commit.h" |
5385f52d JH |
4 | #include "tree.h" |
5 | #include "blob.h" | |
f3ab49db | 6 | #include "tree-walk.h" |
d556fae2 | 7 | #include "refs.h" |
28fb8438 | 8 | #include "remote.h" |
dbe44faa | 9 | #include "dir.h" |
9938af6a | 10 | |
32574b68 NTND |
11 | static int get_sha1_oneline(const char *, unsigned char *, struct commit_list *); |
12 | ||
a78fafe7 JH |
13 | typedef int (*disambiguate_hint_fn)(const unsigned char *, void *); |
14 | ||
15 | struct disambiguate_state { | |
16 | disambiguate_hint_fn fn; | |
17 | void *cb_data; | |
18 | unsigned char candidate[20]; | |
19 | unsigned candidate_exists:1; | |
20 | unsigned candidate_checked:1; | |
21 | unsigned candidate_ok:1; | |
22 | unsigned disambiguate_fn_used:1; | |
23 | unsigned ambiguous:1; | |
957d7406 | 24 | unsigned always_call_fn:1; |
a78fafe7 JH |
25 | }; |
26 | ||
27 | static void update_candidates(struct disambiguate_state *ds, const unsigned char *current) | |
28 | { | |
957d7406 JH |
29 | if (ds->always_call_fn) { |
30 | ds->ambiguous = ds->fn(current, ds->cb_data) ? 1 : 0; | |
31 | return; | |
32 | } | |
a78fafe7 JH |
33 | if (!ds->candidate_exists) { |
34 | /* this is the first candidate */ | |
35 | hashcpy(ds->candidate, current); | |
36 | ds->candidate_exists = 1; | |
37 | return; | |
38 | } else if (!hashcmp(ds->candidate, current)) { | |
39 | /* the same as what we already have seen */ | |
40 | return; | |
41 | } | |
42 | ||
43 | if (!ds->fn) { | |
44 | /* cannot disambiguate between ds->candidate and current */ | |
45 | ds->ambiguous = 1; | |
46 | return; | |
47 | } | |
48 | ||
49 | if (!ds->candidate_checked) { | |
50 | ds->candidate_ok = ds->fn(ds->candidate, ds->cb_data); | |
51 | ds->disambiguate_fn_used = 1; | |
52 | ds->candidate_checked = 1; | |
53 | } | |
54 | ||
55 | if (!ds->candidate_ok) { | |
749f763d | 56 | /* discard the candidate; we know it does not satisfy fn */ |
a78fafe7 JH |
57 | hashcpy(ds->candidate, current); |
58 | ds->candidate_checked = 0; | |
59 | return; | |
60 | } | |
61 | ||
62 | /* if we reach this point, we know ds->candidate satisfies fn */ | |
63 | if (ds->fn(current, ds->cb_data)) { | |
64 | /* | |
65 | * if both current and candidate satisfy fn, we cannot | |
66 | * disambiguate. | |
67 | */ | |
68 | ds->candidate_ok = 0; | |
69 | ds->ambiguous = 1; | |
70 | } | |
71 | ||
72 | /* otherwise, current can be discarded and candidate is still good */ | |
73 | } | |
74 | ||
75 | static void find_short_object_filename(int len, const char *hex_pfx, struct disambiguate_state *ds) | |
9938af6a | 76 | { |
99a19b43 | 77 | struct alternate_object_database *alt; |
9938af6a | 78 | char hex[40]; |
99a19b43 JH |
79 | static struct alternate_object_database *fakeent; |
80 | ||
81 | if (!fakeent) { | |
274ac009 JH |
82 | /* |
83 | * Create a "fake" alternate object database that | |
84 | * points to our own object database, to make it | |
85 | * easier to get a temporary working space in | |
86 | * alt->name/alt->base while iterating over the | |
87 | * object databases including our own. | |
88 | */ | |
99a19b43 JH |
89 | const char *objdir = get_object_directory(); |
90 | int objdir_len = strlen(objdir); | |
91 | int entlen = objdir_len + 43; | |
92 | fakeent = xmalloc(sizeof(*fakeent) + entlen); | |
93 | memcpy(fakeent->base, objdir, objdir_len); | |
94 | fakeent->name = fakeent->base + objdir_len + 1; | |
95 | fakeent->name[-1] = '/'; | |
96 | } | |
97 | fakeent->next = alt_odb_list; | |
9938af6a | 98 | |
1703f9aa | 99 | sprintf(hex, "%.2s", hex_pfx); |
a78fafe7 | 100 | for (alt = fakeent; alt && !ds->ambiguous; alt = alt->next) { |
9938af6a | 101 | struct dirent *de; |
99a19b43 | 102 | DIR *dir; |
1703f9aa | 103 | sprintf(alt->name, "%.2s/", hex_pfx); |
99a19b43 JH |
104 | dir = opendir(alt->base); |
105 | if (!dir) | |
106 | continue; | |
a78fafe7 JH |
107 | |
108 | while (!ds->ambiguous && (de = readdir(dir)) != NULL) { | |
109 | unsigned char sha1[20]; | |
110 | ||
9938af6a JH |
111 | if (strlen(de->d_name) != 38) |
112 | continue; | |
1703f9aa | 113 | if (memcmp(de->d_name, hex_pfx + 2, len - 2)) |
9938af6a | 114 | continue; |
a78fafe7 JH |
115 | memcpy(hex + 2, de->d_name, 38); |
116 | if (!get_sha1_hex(hex, sha1)) | |
117 | update_candidates(ds, sha1); | |
9938af6a JH |
118 | } |
119 | closedir(dir); | |
120 | } | |
9938af6a JH |
121 | } |
122 | ||
123 | static int match_sha(unsigned len, const unsigned char *a, const unsigned char *b) | |
124 | { | |
125 | do { | |
126 | if (*a != *b) | |
127 | return 0; | |
128 | a++; | |
129 | b++; | |
130 | len -= 2; | |
131 | } while (len > 1); | |
132 | if (len) | |
133 | if ((*a ^ *b) & 0xf0) | |
134 | return 0; | |
135 | return 1; | |
136 | } | |
137 | ||
a78fafe7 | 138 | static void unique_in_pack(int len, |
1703f9aa | 139 | const unsigned char *bin_pfx, |
a78fafe7 JH |
140 | struct packed_git *p, |
141 | struct disambiguate_state *ds) | |
9938af6a | 142 | { |
f703e6ea JH |
143 | uint32_t num, last, i, first = 0; |
144 | const unsigned char *current = NULL; | |
145 | ||
146 | open_pack_index(p); | |
147 | num = p->num_objects; | |
148 | last = num; | |
149 | while (first < last) { | |
150 | uint32_t mid = (first + last) / 2; | |
151 | const unsigned char *current; | |
152 | int cmp; | |
153 | ||
154 | current = nth_packed_object_sha1(p, mid); | |
1703f9aa | 155 | cmp = hashcmp(bin_pfx, current); |
f703e6ea JH |
156 | if (!cmp) { |
157 | first = mid; | |
158 | break; | |
9938af6a | 159 | } |
f703e6ea JH |
160 | if (cmp > 0) { |
161 | first = mid+1; | |
162 | continue; | |
9938af6a | 163 | } |
f703e6ea JH |
164 | last = mid; |
165 | } | |
166 | ||
167 | /* | |
168 | * At this point, "first" is the location of the lowest object | |
1703f9aa | 169 | * with an object name that could match "bin_pfx". See if we have |
f703e6ea JH |
170 | * 0, 1 or more objects that actually match(es). |
171 | */ | |
a78fafe7 JH |
172 | for (i = first; i < num && !ds->ambiguous; i++) { |
173 | current = nth_packed_object_sha1(p, i); | |
1703f9aa | 174 | if (!match_sha(len, bin_pfx, current)) |
f703e6ea | 175 | break; |
a78fafe7 | 176 | update_candidates(ds, current); |
9938af6a | 177 | } |
f703e6ea JH |
178 | } |
179 | ||
a78fafe7 JH |
180 | static void find_short_packed_object(int len, const unsigned char *bin_pfx, |
181 | struct disambiguate_state *ds) | |
9938af6a JH |
182 | { |
183 | struct packed_git *p; | |
184 | ||
185 | prepare_packed_git(); | |
a78fafe7 JH |
186 | for (p = packed_git; p && !ds->ambiguous; p = p->next) |
187 | unique_in_pack(len, bin_pfx, p, ds); | |
99a19b43 JH |
188 | } |
189 | ||
013f276e JH |
190 | #define SHORT_NAME_NOT_FOUND (-1) |
191 | #define SHORT_NAME_AMBIGUOUS (-2) | |
192 | ||
a78fafe7 JH |
193 | static int finish_object_disambiguation(struct disambiguate_state *ds, |
194 | unsigned char *sha1) | |
99a19b43 | 195 | { |
a78fafe7 JH |
196 | if (ds->ambiguous) |
197 | return SHORT_NAME_AMBIGUOUS; | |
99a19b43 | 198 | |
a78fafe7 | 199 | if (!ds->candidate_exists) |
013f276e | 200 | return SHORT_NAME_NOT_FOUND; |
a78fafe7 JH |
201 | |
202 | if (!ds->candidate_checked) | |
203 | /* | |
204 | * If this is the only candidate, there is no point | |
205 | * calling the disambiguation hint callback. | |
206 | * | |
207 | * On the other hand, if the current candidate | |
208 | * replaced an earlier candidate that did _not_ pass | |
209 | * the disambiguation hint callback, then we do have | |
210 | * more than one objects that match the short name | |
211 | * given, so we should make sure this one matches; | |
212 | * otherwise, if we discovered this one and the one | |
213 | * that we previously discarded in the reverse order, | |
214 | * we would end up showing different results in the | |
215 | * same repository! | |
216 | */ | |
217 | ds->candidate_ok = (!ds->disambiguate_fn_used || | |
218 | ds->fn(ds->candidate, ds->cb_data)); | |
219 | ||
220 | if (!ds->candidate_ok) | |
013f276e | 221 | return SHORT_NAME_AMBIGUOUS; |
a78fafe7 JH |
222 | |
223 | hashcpy(sha1, ds->candidate); | |
9938af6a JH |
224 | return 0; |
225 | } | |
226 | ||
aa1dec9e JH |
227 | static int disambiguate_commit_only(const unsigned char *sha1, void *cb_data_unused) |
228 | { | |
229 | int kind = sha1_object_info(sha1, NULL); | |
230 | return kind == OBJ_COMMIT; | |
231 | } | |
232 | ||
e2643617 JH |
233 | static int disambiguate_committish_only(const unsigned char *sha1, void *cb_data_unused) |
234 | { | |
235 | struct object *obj; | |
236 | int kind; | |
237 | ||
238 | kind = sha1_object_info(sha1, NULL); | |
239 | if (kind == OBJ_COMMIT) | |
240 | return 1; | |
241 | if (kind != OBJ_TAG) | |
99a19b43 | 242 | return 0; |
e2643617 JH |
243 | |
244 | /* We need to do this the hard way... */ | |
94d75d1e | 245 | obj = deref_tag(parse_object(sha1), NULL, 0); |
e2643617 JH |
246 | if (obj && obj->type == OBJ_COMMIT) |
247 | return 1; | |
9938af6a JH |
248 | return 0; |
249 | } | |
250 | ||
daba53ae | 251 | static int disambiguate_tree_only(const unsigned char *sha1, void *cb_data_unused) |
9938af6a | 252 | { |
daba53ae JH |
253 | int kind = sha1_object_info(sha1, NULL); |
254 | return kind == OBJ_TREE; | |
255 | } | |
9938af6a | 256 | |
daba53ae JH |
257 | static int disambiguate_treeish_only(const unsigned char *sha1, void *cb_data_unused) |
258 | { | |
259 | struct object *obj; | |
260 | int kind; | |
261 | ||
262 | kind = sha1_object_info(sha1, NULL); | |
263 | if (kind == OBJ_TREE || kind == OBJ_COMMIT) | |
264 | return 1; | |
265 | if (kind != OBJ_TAG) | |
266 | return 0; | |
267 | ||
268 | /* We need to do this the hard way... */ | |
269 | obj = deref_tag(lookup_object(sha1), NULL, 0); | |
270 | if (obj && (obj->type == OBJ_TREE || obj->type == OBJ_COMMIT)) | |
271 | return 1; | |
272 | return 0; | |
273 | } | |
274 | ||
275 | static int disambiguate_blob_only(const unsigned char *sha1, void *cb_data_unused) | |
276 | { | |
277 | int kind = sha1_object_info(sha1, NULL); | |
278 | return kind == OBJ_BLOB; | |
279 | } | |
280 | ||
957d7406 JH |
281 | static int prepare_prefixes(const char *name, int len, |
282 | unsigned char *bin_pfx, | |
283 | char *hex_pfx) | |
9938af6a | 284 | { |
957d7406 | 285 | int i; |
9938af6a | 286 | |
1703f9aa JH |
287 | hashclr(bin_pfx); |
288 | memset(hex_pfx, 'x', 40); | |
af61c6e0 | 289 | for (i = 0; i < len ;i++) { |
9938af6a JH |
290 | unsigned char c = name[i]; |
291 | unsigned char val; | |
9938af6a JH |
292 | if (c >= '0' && c <= '9') |
293 | val = c - '0'; | |
294 | else if (c >= 'a' && c <= 'f') | |
295 | val = c - 'a' + 10; | |
296 | else if (c >= 'A' && c <='F') { | |
297 | val = c - 'A' + 10; | |
298 | c -= 'A' - 'a'; | |
299 | } | |
300 | else | |
301 | return -1; | |
1703f9aa | 302 | hex_pfx[i] = c; |
9938af6a JH |
303 | if (!(i & 1)) |
304 | val <<= 4; | |
1703f9aa | 305 | bin_pfx[i >> 1] |= val; |
9938af6a | 306 | } |
957d7406 JH |
307 | return 0; |
308 | } | |
309 | ||
310 | static int get_short_sha1(const char *name, int len, unsigned char *sha1, | |
311 | unsigned flags) | |
312 | { | |
313 | int status; | |
314 | char hex_pfx[40]; | |
315 | unsigned char bin_pfx[20]; | |
316 | struct disambiguate_state ds; | |
317 | int quietly = !!(flags & GET_SHA1_QUIETLY); | |
318 | ||
319 | if (len < MINIMUM_ABBREV || len > 40) | |
320 | return -1; | |
321 | if (prepare_prefixes(name, len, bin_pfx, hex_pfx) < 0) | |
322 | return -1; | |
99a19b43 | 323 | |
a78fafe7 JH |
324 | prepare_alt_odb(); |
325 | ||
326 | memset(&ds, 0, sizeof(ds)); | |
aa1dec9e JH |
327 | if (flags & GET_SHA1_COMMIT) |
328 | ds.fn = disambiguate_commit_only; | |
e2643617 JH |
329 | else if (flags & GET_SHA1_COMMITTISH) |
330 | ds.fn = disambiguate_committish_only; | |
daba53ae JH |
331 | else if (flags & GET_SHA1_TREE) |
332 | ds.fn = disambiguate_tree_only; | |
333 | else if (flags & GET_SHA1_TREEISH) | |
334 | ds.fn = disambiguate_treeish_only; | |
335 | else if (flags & GET_SHA1_BLOB) | |
336 | ds.fn = disambiguate_blob_only; | |
aa1dec9e | 337 | |
a78fafe7 JH |
338 | find_short_object_filename(len, hex_pfx, &ds); |
339 | find_short_packed_object(len, bin_pfx, &ds); | |
340 | status = finish_object_disambiguation(&ds, sha1); | |
99a19b43 | 341 | |
013f276e | 342 | if (!quietly && (status == SHORT_NAME_AMBIGUOUS)) |
1703f9aa | 343 | return error("short SHA1 %.*s is ambiguous.", len, hex_pfx); |
013f276e JH |
344 | return status; |
345 | } | |
346 | ||
957d7406 JH |
347 | int for_each_abbrev(const char *prefix, each_abbrev_fn fn, void *cb_data) |
348 | { | |
349 | char hex_pfx[40]; | |
350 | unsigned char bin_pfx[20]; | |
351 | struct disambiguate_state ds; | |
352 | int len = strlen(prefix); | |
353 | ||
354 | if (len < MINIMUM_ABBREV || len > 40) | |
355 | return -1; | |
356 | if (prepare_prefixes(prefix, len, bin_pfx, hex_pfx) < 0) | |
357 | return -1; | |
358 | ||
359 | prepare_alt_odb(); | |
360 | ||
361 | memset(&ds, 0, sizeof(ds)); | |
362 | ds.always_call_fn = 1; | |
363 | ds.cb_data = cb_data; | |
364 | ds.fn = fn; | |
365 | ||
366 | find_short_object_filename(len, hex_pfx, &ds); | |
367 | find_short_packed_object(len, bin_pfx, &ds); | |
368 | return ds.ambiguous; | |
369 | } | |
370 | ||
013f276e JH |
371 | const char *find_unique_abbrev(const unsigned char *sha1, int len) |
372 | { | |
b66fde9a | 373 | int status, exists; |
013f276e | 374 | static char hex[41]; |
47dd0d59 | 375 | |
013f276e | 376 | memcpy(hex, sha1_to_hex(sha1), 40); |
02c5cba2 | 377 | if (len == 40 || !len) |
47dd0d59 | 378 | return hex; |
61e704e3 | 379 | exists = has_sha1_file(sha1); |
013f276e JH |
380 | while (len < 40) { |
381 | unsigned char sha1_ret[20]; | |
37c00e55 | 382 | status = get_short_sha1(hex, len, sha1_ret, GET_SHA1_QUIETLY); |
b66fde9a JH |
383 | if (exists |
384 | ? !status | |
385 | : status == SHORT_NAME_NOT_FOUND) { | |
ea2c69ed | 386 | hex[len] = 0; |
013f276e JH |
387 | return hex; |
388 | } | |
013f276e JH |
389 | len++; |
390 | } | |
b66fde9a | 391 | return hex; |
9938af6a JH |
392 | } |
393 | ||
6677c466 | 394 | static int ambiguous_path(const char *path, int len) |
af13cdf2 LT |
395 | { |
396 | int slash = 1; | |
6677c466 | 397 | int cnt; |
af13cdf2 | 398 | |
6677c466 | 399 | for (cnt = 0; cnt < len; cnt++) { |
af13cdf2 LT |
400 | switch (*path++) { |
401 | case '\0': | |
402 | break; | |
403 | case '/': | |
404 | if (slash) | |
405 | break; | |
406 | slash = 1; | |
407 | continue; | |
408 | case '.': | |
409 | continue; | |
410 | default: | |
411 | slash = 0; | |
412 | continue; | |
413 | } | |
c054d64e | 414 | break; |
af13cdf2 | 415 | } |
6677c466 | 416 | return slash; |
af13cdf2 LT |
417 | } |
418 | ||
a1ad0eb0 JK |
419 | static inline int at_mark(const char *string, int len, |
420 | const char **suffix, int nr) | |
ae0ba8e2 | 421 | { |
ae0ba8e2 JH |
422 | int i; |
423 | ||
a1ad0eb0 | 424 | for (i = 0; i < nr; i++) { |
ae0ba8e2 JH |
425 | int suffix_len = strlen(suffix[i]); |
426 | if (suffix_len <= len | |
427 | && !memcmp(string, suffix[i], suffix_len)) | |
428 | return suffix_len; | |
429 | } | |
430 | return 0; | |
431 | } | |
432 | ||
a1ad0eb0 JK |
433 | static inline int upstream_mark(const char *string, int len) |
434 | { | |
435 | const char *suffix[] = { "@{upstream}", "@{u}" }; | |
436 | return at_mark(string, len, suffix, ARRAY_SIZE(suffix)); | |
437 | } | |
438 | ||
adfe5d04 JK |
439 | static inline int push_mark(const char *string, int len) |
440 | { | |
441 | const char *suffix[] = { "@{push}" }; | |
442 | return at_mark(string, len, suffix, ARRAY_SIZE(suffix)); | |
443 | } | |
444 | ||
e48ba200 | 445 | static int get_sha1_1(const char *name, int len, unsigned char *sha1, unsigned lookup_flags); |
8cd4249c | 446 | static int interpret_nth_prior_checkout(const char *name, int namelen, struct strbuf *buf); |
d18ba221 | 447 | |
c41a87dd DA |
448 | static int get_sha1_basic(const char *str, int len, unsigned char *sha1, |
449 | unsigned int flags) | |
e86eb666 | 450 | { |
eedce784 | 451 | static const char *warn_msg = "refname '%.*s' is ambiguous."; |
798c35fc NTND |
452 | static const char *object_name_msg = N_( |
453 | "Git normally never creates a ref that ends with 40 hex characters\n" | |
454 | "because it will be ignored when you just specify 40-hex. These refs\n" | |
455 | "may be created by mistake. For example,\n" | |
456 | "\n" | |
457 | " git checkout -b $br $(git rev-parse ...)\n" | |
458 | "\n" | |
459 | "where \"$br\" is somehow empty and a 40-hex ref is created. Please\n" | |
460 | "examine these refs and maybe delete them. Turn this message off by\n" | |
8dc84fdc | 461 | "running \"git config advice.objectNameWarning false\""); |
798c35fc | 462 | unsigned char tmp_sha1[20]; |
ed378ec7 | 463 | char *real_ref = NULL; |
ab2a1a32 | 464 | int refs_found = 0; |
128fd54d | 465 | int at, reflog_len, nth_prior = 0; |
9938af6a | 466 | |
798c35fc | 467 | if (len == 40 && !get_sha1_hex(str, sha1)) { |
832cf74c | 468 | if (warn_ambiguous_refs && warn_on_object_refname_ambiguity) { |
25fba78d | 469 | refs_found = dwim_ref(str, len, tmp_sha1, &real_ref); |
832cf74c | 470 | if (refs_found > 0) { |
25fba78d JK |
471 | warning(warn_msg, len, str); |
472 | if (advice_object_name_warning) | |
473 | fprintf(stderr, "%s\n", _(object_name_msg)); | |
474 | } | |
475 | free(real_ref); | |
798c35fc | 476 | } |
9938af6a | 477 | return 0; |
798c35fc | 478 | } |
9938af6a | 479 | |
d18ba221 | 480 | /* basic@{time or number or -number} format to query ref-log */ |
694500ed | 481 | reflog_len = at = 0; |
f265458f | 482 | if (len && str[len-1] == '}') { |
e883a057 | 483 | for (at = len-4; at >= 0; at--) { |
ab2a1a32 | 484 | if (str[at] == '@' && str[at+1] == '{') { |
83d16bc7 RR |
485 | if (str[at+2] == '-') { |
486 | if (at != 0) | |
487 | /* @{-N} not at start */ | |
488 | return -1; | |
128fd54d FC |
489 | nth_prior = 1; |
490 | continue; | |
491 | } | |
adfe5d04 JK |
492 | if (!upstream_mark(str + at, len - at) && |
493 | !push_mark(str + at, len - at)) { | |
28fb8438 JS |
494 | reflog_len = (len-1) - (at+2); |
495 | len = at; | |
496 | } | |
ab2a1a32 JH |
497 | break; |
498 | } | |
d556fae2 SP |
499 | } |
500 | } | |
501 | ||
af13cdf2 | 502 | /* Accept only unambiguous ref paths. */ |
11cf8801 | 503 | if (len && ambiguous_path(str, len)) |
af13cdf2 LT |
504 | return -1; |
505 | ||
128fd54d | 506 | if (nth_prior) { |
d18ba221 | 507 | struct strbuf buf = STRBUF_INIT; |
128fd54d FC |
508 | int detached; |
509 | ||
8cd4249c | 510 | if (interpret_nth_prior_checkout(str, len, &buf) > 0) { |
128fd54d FC |
511 | detached = (buf.len == 40 && !get_sha1_hex(buf.buf, sha1)); |
512 | strbuf_release(&buf); | |
513 | if (detached) | |
514 | return 0; | |
d18ba221 | 515 | } |
128fd54d FC |
516 | } |
517 | ||
518 | if (!len && reflog_len) | |
11cf8801 NP |
519 | /* allow "@{...}" to mean the current branch reflog */ |
520 | refs_found = dwim_ref("HEAD", 4, sha1, &real_ref); | |
128fd54d | 521 | else if (reflog_len) |
f2eba66d NP |
522 | refs_found = dwim_log(str, len, sha1, &real_ref); |
523 | else | |
11cf8801 | 524 | refs_found = dwim_ref(str, len, sha1, &real_ref); |
d556fae2 SP |
525 | |
526 | if (!refs_found) | |
527 | return -1; | |
528 | ||
c41a87dd | 529 | if (warn_ambiguous_refs && !(flags & GET_SHA1_QUIETLY) && |
798c35fc NTND |
530 | (refs_found > 1 || |
531 | !get_short_sha1(str, len, tmp_sha1, GET_SHA1_QUIETLY))) | |
eedce784 | 532 | warning(warn_msg, len, str); |
d556fae2 | 533 | |
ab2a1a32 | 534 | if (reflog_len) { |
ab2a1a32 JH |
535 | int nth, i; |
536 | unsigned long at_time; | |
16d7cc90 JH |
537 | unsigned long co_time; |
538 | int co_tz, co_cnt; | |
539 | ||
fe558516 | 540 | /* Is it asking for N-th entry, or approxidate? */ |
ab2a1a32 JH |
541 | for (i = nth = 0; 0 <= nth && i < reflog_len; i++) { |
542 | char ch = str[at+2+i]; | |
543 | if ('0' <= ch && ch <= '9') | |
544 | nth = nth * 10 + ch - '0'; | |
545 | else | |
546 | nth = -1; | |
547 | } | |
ea360dd0 SP |
548 | if (100000000 <= nth) { |
549 | at_time = nth; | |
550 | nth = -1; | |
551 | } else if (0 <= nth) | |
ab2a1a32 | 552 | at_time = 0; |
861f00e3 | 553 | else { |
93cfa7c7 | 554 | int errors = 0; |
861f00e3 | 555 | char *tmp = xstrndup(str + at + 2, reflog_len); |
93cfa7c7 | 556 | at_time = approxidate_careful(tmp, &errors); |
861f00e3 | 557 | free(tmp); |
28b35632 JK |
558 | if (errors) { |
559 | free(real_ref); | |
a5e10acb | 560 | return -1; |
28b35632 | 561 | } |
861f00e3 | 562 | } |
c41a87dd | 563 | if (read_ref_at(real_ref, flags, at_time, nth, sha1, NULL, |
16d7cc90 | 564 | &co_time, &co_tz, &co_cnt)) { |
305ebea0 | 565 | if (!len) { |
59556548 | 566 | if (starts_with(real_ref, "refs/heads/")) { |
305ebea0 RR |
567 | str = real_ref + 11; |
568 | len = strlen(real_ref + 11); | |
569 | } else { | |
570 | /* detached HEAD */ | |
571 | str = "HEAD"; | |
572 | len = 4; | |
573 | } | |
574 | } | |
c41a87dd DA |
575 | if (at_time) { |
576 | if (!(flags & GET_SHA1_QUIETLY)) { | |
577 | warning("Log for '%.*s' only goes " | |
578 | "back to %s.", len, str, | |
579 | show_date(co_time, co_tz, DATE_RFC2822)); | |
580 | } | |
581 | } else { | |
582 | if (flags & GET_SHA1_QUIETLY) { | |
583 | exit(128); | |
584 | } | |
e6eedc31 JS |
585 | die("Log for '%.*s' only has %d entries.", |
586 | len, str, co_cnt); | |
587 | } | |
16d7cc90 | 588 | } |
d556fae2 SP |
589 | } |
590 | ||
ed378ec7 | 591 | free(real_ref); |
d556fae2 | 592 | return 0; |
9938af6a JH |
593 | } |
594 | ||
9938af6a JH |
595 | static int get_parent(const char *name, int len, |
596 | unsigned char *result, int idx) | |
597 | { | |
598 | unsigned char sha1[20]; | |
e2643617 | 599 | int ret = get_sha1_1(name, len, sha1, GET_SHA1_COMMITTISH); |
9938af6a JH |
600 | struct commit *commit; |
601 | struct commit_list *p; | |
602 | ||
603 | if (ret) | |
604 | return ret; | |
605 | commit = lookup_commit_reference(sha1); | |
9938af6a JH |
606 | if (parse_commit(commit)) |
607 | return -1; | |
608 | if (!idx) { | |
e702496e | 609 | hashcpy(result, commit->object.sha1); |
9938af6a JH |
610 | return 0; |
611 | } | |
612 | p = commit->parents; | |
613 | while (p) { | |
614 | if (!--idx) { | |
e702496e | 615 | hashcpy(result, p->item->object.sha1); |
9938af6a JH |
616 | return 0; |
617 | } | |
618 | p = p->next; | |
619 | } | |
620 | return -1; | |
621 | } | |
622 | ||
4f7599ac JH |
623 | static int get_nth_ancestor(const char *name, int len, |
624 | unsigned char *result, int generation) | |
625 | { | |
626 | unsigned char sha1[20]; | |
621ff675 LT |
627 | struct commit *commit; |
628 | int ret; | |
629 | ||
e2643617 | 630 | ret = get_sha1_1(name, len, sha1, GET_SHA1_COMMITTISH); |
4f7599ac JH |
631 | if (ret) |
632 | return ret; | |
621ff675 LT |
633 | commit = lookup_commit_reference(sha1); |
634 | if (!commit) | |
635 | return -1; | |
4f7599ac JH |
636 | |
637 | while (generation--) { | |
621ff675 | 638 | if (parse_commit(commit) || !commit->parents) |
4f7599ac | 639 | return -1; |
621ff675 | 640 | commit = commit->parents->item; |
4f7599ac | 641 | } |
621ff675 | 642 | hashcpy(result, commit->object.sha1); |
4f7599ac JH |
643 | return 0; |
644 | } | |
645 | ||
81776315 JH |
646 | struct object *peel_to_type(const char *name, int namelen, |
647 | struct object *o, enum object_type expected_type) | |
648 | { | |
649 | if (name && !namelen) | |
650 | namelen = strlen(name); | |
81776315 JH |
651 | while (1) { |
652 | if (!o || (!o->parsed && !parse_object(o->sha1))) | |
653 | return NULL; | |
a6a3f2cc | 654 | if (expected_type == OBJ_ANY || o->type == expected_type) |
81776315 JH |
655 | return o; |
656 | if (o->type == OBJ_TAG) | |
657 | o = ((struct tag*) o)->tagged; | |
658 | else if (o->type == OBJ_COMMIT) | |
659 | o = &(((struct commit *) o)->tree->object); | |
660 | else { | |
661 | if (name) | |
662 | error("%.*s: expected %s type, but the object " | |
663 | "dereferences to %s type", | |
664 | namelen, name, typename(expected_type), | |
665 | typename(o->type)); | |
666 | return NULL; | |
667 | } | |
668 | } | |
669 | } | |
670 | ||
5385f52d JH |
671 | static int peel_onion(const char *name, int len, unsigned char *sha1) |
672 | { | |
673 | unsigned char outer[20]; | |
674 | const char *sp; | |
885a86ab | 675 | unsigned int expected_type = 0; |
e2643617 | 676 | unsigned lookup_flags = 0; |
5385f52d JH |
677 | struct object *o; |
678 | ||
679 | /* | |
680 | * "ref^{type}" dereferences ref repeatedly until you cannot | |
681 | * dereference anymore, or you get an object of given type, | |
682 | * whichever comes first. "ref^{}" means just dereference | |
683 | * tags until you get a non-tag. "ref^0" is a shorthand for | |
684 | * "ref^{commit}". "commit^{tree}" could be used to find the | |
685 | * top-level tree of the given commit. | |
686 | */ | |
687 | if (len < 4 || name[len-1] != '}') | |
688 | return -1; | |
689 | ||
690 | for (sp = name + len - 1; name <= sp; sp--) { | |
691 | int ch = *sp; | |
692 | if (ch == '{' && name < sp && sp[-1] == '^') | |
693 | break; | |
694 | } | |
695 | if (sp <= name) | |
696 | return -1; | |
697 | ||
698 | sp++; /* beginning of type name, or closing brace for empty */ | |
59556548 | 699 | if (starts_with(sp, "commit}")) |
1974632c | 700 | expected_type = OBJ_COMMIT; |
59556548 | 701 | else if (starts_with(sp, "tag}")) |
75aa26d3 | 702 | expected_type = OBJ_TAG; |
59556548 | 703 | else if (starts_with(sp, "tree}")) |
1974632c | 704 | expected_type = OBJ_TREE; |
59556548 | 705 | else if (starts_with(sp, "blob}")) |
1974632c | 706 | expected_type = OBJ_BLOB; |
59556548 | 707 | else if (starts_with(sp, "object}")) |
a6a3f2cc | 708 | expected_type = OBJ_ANY; |
5385f52d | 709 | else if (sp[0] == '}') |
1974632c | 710 | expected_type = OBJ_NONE; |
32574b68 NTND |
711 | else if (sp[0] == '/') |
712 | expected_type = OBJ_COMMIT; | |
5385f52d JH |
713 | else |
714 | return -1; | |
715 | ||
e2643617 JH |
716 | if (expected_type == OBJ_COMMIT) |
717 | lookup_flags = GET_SHA1_COMMITTISH; | |
ed1ca602 JH |
718 | else if (expected_type == OBJ_TREE) |
719 | lookup_flags = GET_SHA1_TREEISH; | |
e2643617 JH |
720 | |
721 | if (get_sha1_1(name, sp - name - 2, outer, lookup_flags)) | |
5385f52d JH |
722 | return -1; |
723 | ||
724 | o = parse_object(outer); | |
725 | if (!o) | |
726 | return -1; | |
885a86ab | 727 | if (!expected_type) { |
9534f40b | 728 | o = deref_tag(o, name, sp - name - 2); |
6e1c6c10 JH |
729 | if (!o || (!o->parsed && !parse_object(o->sha1))) |
730 | return -1; | |
e702496e | 731 | hashcpy(sha1, o->sha1); |
32574b68 | 732 | return 0; |
5385f52d | 733 | } |
32574b68 NTND |
734 | |
735 | /* | |
736 | * At this point, the syntax look correct, so | |
737 | * if we do not get the needed object, we should | |
738 | * barf. | |
739 | */ | |
740 | o = peel_to_type(name, len, o, expected_type); | |
741 | if (!o) | |
81776315 | 742 | return -1; |
32574b68 NTND |
743 | |
744 | hashcpy(sha1, o->sha1); | |
745 | if (sp[0] == '/') { | |
746 | /* "$commit^{/foo}" */ | |
747 | char *prefix; | |
748 | int ret; | |
749 | struct commit_list *list = NULL; | |
750 | ||
81776315 | 751 | /* |
4322842a NTND |
752 | * $commit^{/}. Some regex implementation may reject. |
753 | * We don't need regex anyway. '' pattern always matches. | |
5385f52d | 754 | */ |
4322842a | 755 | if (sp[1] == '}') |
81776315 | 756 | return 0; |
4322842a | 757 | |
32574b68 NTND |
758 | prefix = xstrndup(sp + 1, name + len - 1 - (sp + 1)); |
759 | commit_list_insert((struct commit *)o, &list); | |
760 | ret = get_sha1_oneline(prefix, sha1, list); | |
761 | free(prefix); | |
762 | return ret; | |
5385f52d JH |
763 | } |
764 | return 0; | |
765 | } | |
766 | ||
7dd45e15 JH |
767 | static int get_describe_name(const char *name, int len, unsigned char *sha1) |
768 | { | |
769 | const char *cp; | |
6269b6b6 | 770 | unsigned flags = GET_SHA1_QUIETLY | GET_SHA1_COMMIT; |
7dd45e15 JH |
771 | |
772 | for (cp = name + len - 1; name + 2 <= cp; cp--) { | |
773 | char ch = *cp; | |
6f75d45b | 774 | if (!isxdigit(ch)) { |
7dd45e15 JH |
775 | /* We must be looking at g in "SOMETHING-g" |
776 | * for it to be describe output. | |
777 | */ | |
778 | if (ch == 'g' && cp[-1] == '-') { | |
779 | cp++; | |
780 | len -= cp - name; | |
6269b6b6 | 781 | return get_short_sha1(cp, len, sha1, flags); |
7dd45e15 JH |
782 | } |
783 | } | |
784 | } | |
785 | return -1; | |
786 | } | |
787 | ||
e48ba200 | 788 | static int get_sha1_1(const char *name, int len, unsigned char *sha1, unsigned lookup_flags) |
9938af6a | 789 | { |
0601dbe1 | 790 | int ret, has_suffix; |
4f7599ac | 791 | const char *cp; |
9938af6a | 792 | |
621ff675 LT |
793 | /* |
794 | * "name~3" is "name^^^", "name~" is "name~1", and "name^" is "name^1". | |
4f7599ac | 795 | */ |
0601dbe1 | 796 | has_suffix = 0; |
4f7599ac JH |
797 | for (cp = name + len - 1; name <= cp; cp--) { |
798 | int ch = *cp; | |
799 | if ('0' <= ch && ch <= '9') | |
800 | continue; | |
0601dbe1 JH |
801 | if (ch == '~' || ch == '^') |
802 | has_suffix = ch; | |
4f7599ac JH |
803 | break; |
804 | } | |
0601dbe1 JH |
805 | |
806 | if (has_suffix) { | |
807 | int num = 0; | |
4f7599ac JH |
808 | int len1 = cp - name; |
809 | cp++; | |
810 | while (cp < name + len) | |
0601dbe1 | 811 | num = num * 10 + *cp++ - '0'; |
621ff675 LT |
812 | if (!num && len1 == len - 1) |
813 | num = 1; | |
814 | if (has_suffix == '^') | |
0601dbe1 | 815 | return get_parent(name, len1, sha1, num); |
0601dbe1 JH |
816 | /* else if (has_suffix == '~') -- goes without saying */ |
817 | return get_nth_ancestor(name, len1, sha1, num); | |
4f7599ac JH |
818 | } |
819 | ||
5385f52d JH |
820 | ret = peel_onion(name, len, sha1); |
821 | if (!ret) | |
822 | return 0; | |
823 | ||
c41a87dd | 824 | ret = get_sha1_basic(name, len, sha1, lookup_flags); |
9938af6a JH |
825 | if (!ret) |
826 | return 0; | |
7dd45e15 JH |
827 | |
828 | /* It could be describe output that is "SOMETHING-gXXXX" */ | |
829 | ret = get_describe_name(name, len, sha1); | |
830 | if (!ret) | |
831 | return 0; | |
832 | ||
e2643617 | 833 | return get_short_sha1(name, len, sha1, lookup_flags); |
9938af6a JH |
834 | } |
835 | ||
f7bff003 JH |
836 | /* |
837 | * This interprets names like ':/Initial revision of "git"' by searching | |
838 | * through history and returning the first commit whose message starts | |
3d045897 | 839 | * the given regular expression. |
f7bff003 JH |
840 | * |
841 | * For future extension, ':/!' is reserved. If you want to match a message | |
842 | * beginning with a '!', you have to repeat the exclamation mark. | |
843 | */ | |
208acbfb NTND |
844 | |
845 | /* Remember to update object flag allocation in object.h */ | |
f7bff003 JH |
846 | #define ONELINE_SEEN (1u<<20) |
847 | ||
9c5fe0b8 MH |
848 | static int handle_one_ref(const char *path, const struct object_id *oid, |
849 | int flag, void *cb_data) | |
28a4d940 JS |
850 | { |
851 | struct commit_list **list = cb_data; | |
9c5fe0b8 | 852 | struct object *object = parse_object(oid->hash); |
28a4d940 JS |
853 | if (!object) |
854 | return 0; | |
affeef12 | 855 | if (object->type == OBJ_TAG) { |
28a4d940 | 856 | object = deref_tag(object, path, strlen(path)); |
affeef12 MK |
857 | if (!object) |
858 | return 0; | |
859 | } | |
28a4d940 JS |
860 | if (object->type != OBJ_COMMIT) |
861 | return 0; | |
e8d1dfe6 | 862 | commit_list_insert((struct commit *)object, list); |
28a4d940 JS |
863 | return 0; |
864 | } | |
865 | ||
84baa31b NTND |
866 | static int get_sha1_oneline(const char *prefix, unsigned char *sha1, |
867 | struct commit_list *list) | |
28a4d940 | 868 | { |
84baa31b | 869 | struct commit_list *backup = NULL, *l; |
28042dbc | 870 | int found = 0; |
57895105 | 871 | regex_t regex; |
28a4d940 JS |
872 | |
873 | if (prefix[0] == '!') { | |
874 | if (prefix[1] != '!') | |
875 | die ("Invalid search pattern: %s", prefix); | |
876 | prefix++; | |
877 | } | |
57895105 LT |
878 | |
879 | if (regcomp(®ex, prefix, REG_EXTENDED)) | |
880 | die("Invalid search pattern: %s", prefix); | |
881 | ||
84baa31b NTND |
882 | for (l = list; l; l = l->next) { |
883 | l->item->object.flags |= ONELINE_SEEN; | |
28a4d940 | 884 | commit_list_insert(l->item, &backup); |
84baa31b | 885 | } |
ed8ad7e2 | 886 | while (list) { |
ba41c1c9 | 887 | const char *p, *buf; |
1358e7d6 | 888 | struct commit *commit; |
28042dbc | 889 | int matches; |
ed8ad7e2 JM |
890 | |
891 | commit = pop_most_recent_commit(&list, ONELINE_SEEN); | |
283cdbcf MK |
892 | if (!parse_object(commit->object.sha1)) |
893 | continue; | |
8597ea3a | 894 | buf = get_commit_buffer(commit, NULL); |
ba41c1c9 | 895 | p = strstr(buf, "\n\n"); |
28042dbc | 896 | matches = p && !regexec(®ex, p + 2, 0, NULL, 0); |
ba41c1c9 | 897 | unuse_commit_buffer(commit, buf); |
28042dbc JH |
898 | |
899 | if (matches) { | |
28a4d940 | 900 | hashcpy(sha1, commit->object.sha1); |
28042dbc | 901 | found = 1; |
28a4d940 JS |
902 | break; |
903 | } | |
904 | } | |
57895105 | 905 | regfree(®ex); |
28a4d940 JS |
906 | free_commit_list(list); |
907 | for (l = backup; l; l = l->next) | |
908 | clear_commit_marks(l->item, ONELINE_SEEN); | |
28042dbc JH |
909 | free_commit_list(backup); |
910 | return found ? 0 : -1; | |
28a4d940 JS |
911 | } |
912 | ||
ae5a6c36 | 913 | struct grab_nth_branch_switch_cbdata { |
98f85ff4 JH |
914 | int remaining; |
915 | struct strbuf buf; | |
ae5a6c36 JH |
916 | }; |
917 | ||
918 | static int grab_nth_branch_switch(unsigned char *osha1, unsigned char *nsha1, | |
919 | const char *email, unsigned long timestamp, int tz, | |
920 | const char *message, void *cb_data) | |
921 | { | |
922 | struct grab_nth_branch_switch_cbdata *cb = cb_data; | |
a884d0cb TR |
923 | const char *match = NULL, *target = NULL; |
924 | size_t len; | |
925 | ||
95b567c7 | 926 | if (skip_prefix(message, "checkout: moving from ", &match)) |
d7c03c1f | 927 | target = strstr(match, " to "); |
ae5a6c36 | 928 | |
c829774c | 929 | if (!match || !target) |
ae5a6c36 | 930 | return 0; |
98f85ff4 JH |
931 | if (--(cb->remaining) == 0) { |
932 | len = target - match; | |
933 | strbuf_reset(&cb->buf); | |
934 | strbuf_add(&cb->buf, match, len); | |
935 | return 1; /* we are done */ | |
936 | } | |
ae5a6c36 JH |
937 | return 0; |
938 | } | |
939 | ||
940 | /* | |
ae0ba8e2 JH |
941 | * Parse @{-N} syntax, return the number of characters parsed |
942 | * if successful; otherwise signal an error with negative value. | |
ae5a6c36 | 943 | */ |
8cd4249c JK |
944 | static int interpret_nth_prior_checkout(const char *name, int namelen, |
945 | struct strbuf *buf) | |
ae5a6c36 | 946 | { |
c2883e62 | 947 | long nth; |
98f85ff4 | 948 | int retval; |
ae5a6c36 | 949 | struct grab_nth_branch_switch_cbdata cb; |
a884d0cb TR |
950 | const char *brace; |
951 | char *num_end; | |
ae5a6c36 | 952 | |
8cd4249c JK |
953 | if (namelen < 4) |
954 | return -1; | |
ae5a6c36 JH |
955 | if (name[0] != '@' || name[1] != '{' || name[2] != '-') |
956 | return -1; | |
8cd4249c | 957 | brace = memchr(name, '}', namelen); |
a884d0cb TR |
958 | if (!brace) |
959 | return -1; | |
98f85ff4 | 960 | nth = strtol(name + 3, &num_end, 10); |
a884d0cb | 961 | if (num_end != brace) |
ae5a6c36 | 962 | return -1; |
c2883e62 JH |
963 | if (nth <= 0) |
964 | return -1; | |
98f85ff4 JH |
965 | cb.remaining = nth; |
966 | strbuf_init(&cb.buf, 20); | |
967 | ||
39765e59 | 968 | retval = 0; |
98f85ff4 JH |
969 | if (0 < for_each_reflog_ent_reverse("HEAD", grab_nth_branch_switch, &cb)) { |
970 | strbuf_reset(buf); | |
e992d1eb | 971 | strbuf_addbuf(buf, &cb.buf); |
98f85ff4 JH |
972 | retval = brace - name + 1; |
973 | } | |
a884d0cb | 974 | |
98f85ff4 | 975 | strbuf_release(&cb.buf); |
39765e59 | 976 | return retval; |
ae5a6c36 JH |
977 | } |
978 | ||
619a644d JH |
979 | int get_sha1_mb(const char *name, unsigned char *sha1) |
980 | { | |
981 | struct commit *one, *two; | |
982 | struct commit_list *mbs; | |
983 | unsigned char sha1_tmp[20]; | |
984 | const char *dots; | |
985 | int st; | |
986 | ||
987 | dots = strstr(name, "..."); | |
988 | if (!dots) | |
989 | return get_sha1(name, sha1); | |
990 | if (dots == name) | |
991 | st = get_sha1("HEAD", sha1_tmp); | |
992 | else { | |
993 | struct strbuf sb; | |
994 | strbuf_init(&sb, dots - name); | |
995 | strbuf_add(&sb, name, dots - name); | |
cd74e473 | 996 | st = get_sha1_committish(sb.buf, sha1_tmp); |
619a644d JH |
997 | strbuf_release(&sb); |
998 | } | |
999 | if (st) | |
1000 | return st; | |
1001 | one = lookup_commit_reference_gently(sha1_tmp, 0); | |
1002 | if (!one) | |
1003 | return -1; | |
1004 | ||
cd74e473 | 1005 | if (get_sha1_committish(dots[3] ? (dots + 3) : "HEAD", sha1_tmp)) |
619a644d JH |
1006 | return -1; |
1007 | two = lookup_commit_reference_gently(sha1_tmp, 0); | |
1008 | if (!two) | |
1009 | return -1; | |
2ce406cc | 1010 | mbs = get_merge_bases(one, two); |
619a644d JH |
1011 | if (!mbs || mbs->next) |
1012 | st = -1; | |
1013 | else { | |
1014 | st = 0; | |
1015 | hashcpy(sha1, mbs->item->object.sha1); | |
1016 | } | |
1017 | free_commit_list(mbs); | |
1018 | return st; | |
1019 | } | |
1020 | ||
9ba89f48 FC |
1021 | /* parse @something syntax, when 'something' is not {.*} */ |
1022 | static int interpret_empty_at(const char *name, int namelen, int len, struct strbuf *buf) | |
1023 | { | |
1024 | const char *next; | |
1025 | ||
1026 | if (len || name[1] == '{') | |
1027 | return -1; | |
1028 | ||
1029 | /* make sure it's a single @, or @@{.*}, not @foo */ | |
8cd4249c | 1030 | next = memchr(name + len + 1, '@', namelen - len - 1); |
9ba89f48 FC |
1031 | if (next && next[1] != '{') |
1032 | return -1; | |
1033 | if (!next) | |
1034 | next = name + namelen; | |
1035 | if (next != name + 1) | |
1036 | return -1; | |
1037 | ||
1038 | strbuf_reset(buf); | |
1039 | strbuf_add(buf, "HEAD", 4); | |
1040 | return 1; | |
1041 | } | |
1042 | ||
7a0a49a7 FC |
1043 | static int reinterpret(const char *name, int namelen, int len, struct strbuf *buf) |
1044 | { | |
1045 | /* we have extra data, which might need further processing */ | |
1046 | struct strbuf tmp = STRBUF_INIT; | |
1047 | int used = buf->len; | |
1048 | int ret; | |
1049 | ||
1050 | strbuf_add(buf, name + len, namelen - len); | |
cf99a761 | 1051 | ret = interpret_branch_name(buf->buf, buf->len, &tmp); |
7a0a49a7 FC |
1052 | /* that data was not interpreted, remove our cruft */ |
1053 | if (ret < 0) { | |
1054 | strbuf_setlen(buf, used); | |
1055 | return len; | |
1056 | } | |
1057 | strbuf_reset(buf); | |
1058 | strbuf_addbuf(buf, &tmp); | |
1059 | strbuf_release(&tmp); | |
1060 | /* tweak for size of {-N} versus expanded ref name */ | |
1061 | return ret - used + len; | |
1062 | } | |
1063 | ||
a39c14af JK |
1064 | static void set_shortened_ref(struct strbuf *buf, const char *ref) |
1065 | { | |
1066 | char *s = shorten_unambiguous_ref(ref, 0); | |
1067 | strbuf_reset(buf); | |
1068 | strbuf_addstr(buf, s); | |
1069 | free(s); | |
1070 | } | |
1071 | ||
48c58471 JK |
1072 | static int interpret_branch_mark(const char *name, int namelen, |
1073 | int at, struct strbuf *buf, | |
1074 | int (*get_mark)(const char *, int), | |
1075 | const char *(*get_data)(struct branch *, | |
1076 | struct strbuf *)) | |
a39c14af JK |
1077 | { |
1078 | int len; | |
48c58471 JK |
1079 | struct branch *branch; |
1080 | struct strbuf err = STRBUF_INIT; | |
1081 | const char *value; | |
a39c14af | 1082 | |
48c58471 | 1083 | len = get_mark(name + at, namelen - at); |
a39c14af JK |
1084 | if (!len) |
1085 | return -1; | |
1086 | ||
3f6eb30f JK |
1087 | if (memchr(name, ':', at)) |
1088 | return -1; | |
1089 | ||
48c58471 JK |
1090 | if (at) { |
1091 | char *name_str = xmemdupz(name, at); | |
1092 | branch = branch_get(name_str); | |
1093 | free(name_str); | |
1094 | } else | |
1095 | branch = branch_get(NULL); | |
1096 | ||
1097 | value = get_data(branch, &err); | |
1098 | if (!value) | |
1099 | die("%s", err.buf); | |
1100 | ||
1101 | set_shortened_ref(buf, value); | |
a39c14af JK |
1102 | return len + at; |
1103 | } | |
1104 | ||
ae0ba8e2 JH |
1105 | /* |
1106 | * This reads short-hand syntax that not only evaluates to a commit | |
1107 | * object name, but also can act as if the end user spelled the name | |
1108 | * of the branch from the command line. | |
1109 | * | |
1110 | * - "@{-N}" finds the name of the Nth previous branch we were on, and | |
1111 | * places the name of the branch in the given buf and returns the | |
1112 | * number of characters parsed if successful. | |
1113 | * | |
1114 | * - "<branch>@{upstream}" finds the name of the other ref that | |
1115 | * <branch> is configured to merge with (missing <branch> defaults | |
1116 | * to the current branch), and places the name of the branch in the | |
1117 | * given buf and returns the number of characters parsed if | |
1118 | * successful. | |
1119 | * | |
1120 | * If the input is not of the accepted format, it returns a negative | |
1121 | * number to signal an error. | |
1122 | * | |
1123 | * If the input was ok but there are not N branch switches in the | |
1124 | * reflog, it returns 0. | |
1125 | */ | |
cf99a761 | 1126 | int interpret_branch_name(const char *name, int namelen, struct strbuf *buf) |
ae0ba8e2 | 1127 | { |
f278f40f | 1128 | char *at; |
9892d5d4 | 1129 | const char *start; |
8cd4249c | 1130 | int len = interpret_nth_prior_checkout(name, namelen, buf); |
ae0ba8e2 | 1131 | |
cf99a761 FC |
1132 | if (!namelen) |
1133 | namelen = strlen(name); | |
1134 | ||
1f27e7d5 | 1135 | if (!len) { |
ae0ba8e2 | 1136 | return len; /* syntax Ok, not enough switches */ |
1f27e7d5 FC |
1137 | } else if (len > 0) { |
1138 | if (len == namelen) | |
1139 | return len; /* consumed all */ | |
1140 | else | |
1141 | return reinterpret(name, namelen, len, buf); | |
d46a8301 JK |
1142 | } |
1143 | ||
9892d5d4 JK |
1144 | for (start = name; |
1145 | (at = memchr(start, '@', namelen - (start - name))); | |
1146 | start = at + 1) { | |
9ba89f48 | 1147 | |
9892d5d4 JK |
1148 | len = interpret_empty_at(name, namelen, at - name, buf); |
1149 | if (len > 0) | |
1150 | return reinterpret(name, namelen, len, buf); | |
9ba89f48 | 1151 | |
48c58471 JK |
1152 | len = interpret_branch_mark(name, namelen, at - name, buf, |
1153 | upstream_mark, branch_get_upstream); | |
9892d5d4 JK |
1154 | if (len > 0) |
1155 | return len; | |
adfe5d04 JK |
1156 | |
1157 | len = interpret_branch_mark(name, namelen, at - name, buf, | |
1158 | push_mark, branch_get_push); | |
9892d5d4 JK |
1159 | if (len > 0) |
1160 | return len; | |
bb0dab5d | 1161 | } |
9ba89f48 | 1162 | |
a39c14af | 1163 | return -1; |
ae0ba8e2 JH |
1164 | } |
1165 | ||
6bab74e7 JN |
1166 | int strbuf_branchname(struct strbuf *sb, const char *name) |
1167 | { | |
1168 | int len = strlen(name); | |
cf99a761 | 1169 | int used = interpret_branch_name(name, len, sb); |
84cf2466 JH |
1170 | |
1171 | if (used == len) | |
6bab74e7 | 1172 | return 0; |
84cf2466 JH |
1173 | if (used < 0) |
1174 | used = 0; | |
1175 | strbuf_add(sb, name + used, len - used); | |
6bab74e7 JN |
1176 | return len; |
1177 | } | |
1178 | ||
1179 | int strbuf_check_branch_ref(struct strbuf *sb, const char *name) | |
1180 | { | |
1181 | strbuf_branchname(sb, name); | |
1182 | if (name[0] == '-') | |
8d9c5010 | 1183 | return -1; |
6bab74e7 | 1184 | strbuf_splice(sb, 0, 0, "refs/heads/", 11); |
8d9c5010 | 1185 | return check_refname_format(sb->buf, 0); |
6bab74e7 JN |
1186 | } |
1187 | ||
9938af6a JH |
1188 | /* |
1189 | * This is like "get_sha1_basic()", except it allows "sha1 expressions", | |
1190 | * notably "xyz^" for "parent of xyz" | |
1191 | */ | |
1192 | int get_sha1(const char *name, unsigned char *sha1) | |
1193 | { | |
573285e5 | 1194 | struct object_context unused; |
33bd598c | 1195 | return get_sha1_with_context(name, 0, sha1, &unused); |
a0cd87a5 MK |
1196 | } |
1197 | ||
cd74e473 | 1198 | /* |
a8a5406a | 1199 | * Many callers know that the user meant to name a commit-ish by |
cd74e473 JH |
1200 | * syntactical positions where the object name appears. Calling this |
1201 | * function allows the machinery to disambiguate shorter-than-unique | |
a8a5406a | 1202 | * abbreviated object names between commit-ish and others. |
cd74e473 JH |
1203 | * |
1204 | * Note that this does NOT error out when the named object is not a | |
a8a5406a | 1205 | * commit-ish. It is merely to give a hint to the disambiguation |
cd74e473 JH |
1206 | * machinery. |
1207 | */ | |
1208 | int get_sha1_committish(const char *name, unsigned char *sha1) | |
1209 | { | |
1210 | struct object_context unused; | |
1211 | return get_sha1_with_context(name, GET_SHA1_COMMITTISH, | |
1212 | sha1, &unused); | |
1213 | } | |
1214 | ||
daba53ae JH |
1215 | int get_sha1_treeish(const char *name, unsigned char *sha1) |
1216 | { | |
1217 | struct object_context unused; | |
1218 | return get_sha1_with_context(name, GET_SHA1_TREEISH, | |
1219 | sha1, &unused); | |
1220 | } | |
1221 | ||
1222 | int get_sha1_commit(const char *name, unsigned char *sha1) | |
1223 | { | |
1224 | struct object_context unused; | |
1225 | return get_sha1_with_context(name, GET_SHA1_COMMIT, | |
1226 | sha1, &unused); | |
1227 | } | |
1228 | ||
1229 | int get_sha1_tree(const char *name, unsigned char *sha1) | |
1230 | { | |
1231 | struct object_context unused; | |
1232 | return get_sha1_with_context(name, GET_SHA1_TREE, | |
1233 | sha1, &unused); | |
1234 | } | |
1235 | ||
1236 | int get_sha1_blob(const char *name, unsigned char *sha1) | |
1237 | { | |
1238 | struct object_context unused; | |
1239 | return get_sha1_with_context(name, GET_SHA1_BLOB, | |
1240 | sha1, &unused); | |
a0cd87a5 MK |
1241 | } |
1242 | ||
009fee47 MM |
1243 | /* Must be called only when object_name:filename doesn't exist. */ |
1244 | static void diagnose_invalid_sha1_path(const char *prefix, | |
1245 | const char *filename, | |
1246 | const unsigned char *tree_sha1, | |
b2981d06 RS |
1247 | const char *object_name, |
1248 | int object_name_len) | |
009fee47 | 1249 | { |
009fee47 MM |
1250 | unsigned char sha1[20]; |
1251 | unsigned mode; | |
1252 | ||
1253 | if (!prefix) | |
1254 | prefix = ""; | |
1255 | ||
dbe44faa | 1256 | if (file_exists(filename)) |
b2981d06 RS |
1257 | die("Path '%s' exists on disk, but not in '%.*s'.", |
1258 | filename, object_name_len, object_name); | |
009fee47 | 1259 | if (errno == ENOENT || errno == ENOTDIR) { |
b2724c87 | 1260 | char *fullname = xstrfmt("%s%s", prefix, filename); |
009fee47 MM |
1261 | |
1262 | if (!get_tree_entry(tree_sha1, fullname, | |
1263 | sha1, &mode)) { | |
1264 | die("Path '%s' exists, but not '%s'.\n" | |
b2981d06 | 1265 | "Did you mean '%.*s:%s' aka '%.*s:./%s'?", |
009fee47 MM |
1266 | fullname, |
1267 | filename, | |
b2981d06 | 1268 | object_name_len, object_name, |
e41d718c | 1269 | fullname, |
b2981d06 | 1270 | object_name_len, object_name, |
e41d718c | 1271 | filename); |
009fee47 | 1272 | } |
b2981d06 RS |
1273 | die("Path '%s' does not exist in '%.*s'", |
1274 | filename, object_name_len, object_name); | |
009fee47 MM |
1275 | } |
1276 | } | |
1277 | ||
1278 | /* Must be called only when :stage:filename doesn't exist. */ | |
1279 | static void diagnose_invalid_index_path(int stage, | |
1280 | const char *prefix, | |
1281 | const char *filename) | |
1282 | { | |
9c5e6c80 | 1283 | const struct cache_entry *ce; |
009fee47 MM |
1284 | int pos; |
1285 | unsigned namelen = strlen(filename); | |
1286 | unsigned fullnamelen; | |
1287 | char *fullname; | |
1288 | ||
1289 | if (!prefix) | |
1290 | prefix = ""; | |
1291 | ||
1292 | /* Wrong stage number? */ | |
1293 | pos = cache_name_pos(filename, namelen); | |
1294 | if (pos < 0) | |
1295 | pos = -pos - 1; | |
77e8466f MH |
1296 | if (pos < active_nr) { |
1297 | ce = active_cache[pos]; | |
1298 | if (ce_namelen(ce) == namelen && | |
1299 | !memcmp(ce->name, filename, namelen)) | |
1300 | die("Path '%s' is in the index, but not at stage %d.\n" | |
1301 | "Did you mean ':%d:%s'?", | |
1302 | filename, stage, | |
1303 | ce_stage(ce), filename); | |
1304 | } | |
009fee47 MM |
1305 | |
1306 | /* Confusion between relative and absolute filenames? */ | |
1307 | fullnamelen = namelen + strlen(prefix); | |
1308 | fullname = xmalloc(fullnamelen + 1); | |
1309 | strcpy(fullname, prefix); | |
1310 | strcat(fullname, filename); | |
1311 | pos = cache_name_pos(fullname, fullnamelen); | |
1312 | if (pos < 0) | |
1313 | pos = -pos - 1; | |
77e8466f MH |
1314 | if (pos < active_nr) { |
1315 | ce = active_cache[pos]; | |
1316 | if (ce_namelen(ce) == fullnamelen && | |
1317 | !memcmp(ce->name, fullname, fullnamelen)) | |
1318 | die("Path '%s' is in the index, but not '%s'.\n" | |
e41d718c | 1319 | "Did you mean ':%d:%s' aka ':%d:./%s'?", |
77e8466f | 1320 | fullname, filename, |
e41d718c MG |
1321 | ce_stage(ce), fullname, |
1322 | ce_stage(ce), filename); | |
77e8466f | 1323 | } |
009fee47 | 1324 | |
dbe44faa | 1325 | if (file_exists(filename)) |
009fee47 MM |
1326 | die("Path '%s' exists on disk, but not in the index.", filename); |
1327 | if (errno == ENOENT || errno == ENOTDIR) | |
1328 | die("Path '%s' does not exist (neither on disk nor in the index).", | |
1329 | filename); | |
1330 | ||
1331 | free(fullname); | |
1332 | } | |
1333 | ||
1334 | ||
979f7929 NTND |
1335 | static char *resolve_relative_path(const char *rel) |
1336 | { | |
59556548 | 1337 | if (!starts_with(rel, "./") && !starts_with(rel, "../")) |
979f7929 NTND |
1338 | return NULL; |
1339 | ||
1340 | if (!startup_info) | |
1341 | die("BUG: startup_info struct is not initialized."); | |
1342 | ||
1343 | if (!is_inside_work_tree()) | |
1344 | die("relative path syntax can't be used outside working tree."); | |
1345 | ||
1346 | /* die() inside prefix_path() if resolved path is outside worktree */ | |
1347 | return prefix_path(startup_info->prefix, | |
1348 | startup_info->prefix ? strlen(startup_info->prefix) : 0, | |
1349 | rel); | |
1350 | } | |
1351 | ||
33bd598c JH |
1352 | static int get_sha1_with_context_1(const char *name, |
1353 | unsigned flags, | |
1354 | const char *prefix, | |
1355 | unsigned char *sha1, | |
1356 | struct object_context *oc) | |
a0cd87a5 MK |
1357 | { |
1358 | int ret, bracket_depth; | |
73b0e5af JH |
1359 | int namelen = strlen(name); |
1360 | const char *cp; | |
33bd598c | 1361 | int only_to_die = flags & GET_SHA1_ONLY_TO_DIE; |
5119602a | 1362 | |
573285e5 CP |
1363 | memset(oc, 0, sizeof(*oc)); |
1364 | oc->mode = S_IFINVALID; | |
33bd598c | 1365 | ret = get_sha1_1(name, namelen, sha1, flags); |
73b0e5af JH |
1366 | if (!ret) |
1367 | return ret; | |
33bd598c JH |
1368 | /* |
1369 | * sha1:path --> object name of path in ent sha1 | |
979f7929 NTND |
1370 | * :path -> object name of absolute path in index |
1371 | * :./path -> object name of path relative to cwd in index | |
73b0e5af | 1372 | * :[0-3]:path -> object name of path in index at stage |
95ad6d2d | 1373 | * :/foo -> recent commit matching foo |
73b0e5af JH |
1374 | */ |
1375 | if (name[0] == ':') { | |
1376 | int stage = 0; | |
9c5e6c80 | 1377 | const struct cache_entry *ce; |
979f7929 | 1378 | char *new_path = NULL; |
73b0e5af | 1379 | int pos; |
2e83b66c | 1380 | if (!only_to_die && namelen > 2 && name[1] == '/') { |
84baa31b | 1381 | struct commit_list *list = NULL; |
2b2a5be3 | 1382 | |
84baa31b | 1383 | for_each_ref(handle_one_ref, &list); |
e8d1dfe6 | 1384 | commit_list_sort_by_date(&list); |
84baa31b NTND |
1385 | return get_sha1_oneline(name + 2, sha1, list); |
1386 | } | |
73b0e5af JH |
1387 | if (namelen < 3 || |
1388 | name[2] != ':' || | |
1389 | name[1] < '0' || '3' < name[1]) | |
1390 | cp = name + 1; | |
1391 | else { | |
1392 | stage = name[1] - '0'; | |
1393 | cp = name + 3; | |
5119602a | 1394 | } |
3d6e0f74 JH |
1395 | new_path = resolve_relative_path(cp); |
1396 | if (!new_path) { | |
1397 | namelen = namelen - (cp - name); | |
1398 | } else { | |
1399 | cp = new_path; | |
1400 | namelen = strlen(cp); | |
1401 | } | |
573285e5 | 1402 | |
2ce63e9f | 1403 | strlcpy(oc->path, cp, sizeof(oc->path)); |
573285e5 | 1404 | |
73b0e5af JH |
1405 | if (!active_cache) |
1406 | read_cache(); | |
73b0e5af JH |
1407 | pos = cache_name_pos(cp, namelen); |
1408 | if (pos < 0) | |
1409 | pos = -pos - 1; | |
1410 | while (pos < active_nr) { | |
1411 | ce = active_cache[pos]; | |
1412 | if (ce_namelen(ce) != namelen || | |
1413 | memcmp(ce->name, cp, namelen)) | |
1414 | break; | |
1415 | if (ce_stage(ce) == stage) { | |
e702496e | 1416 | hashcpy(sha1, ce->sha1); |
90064710 | 1417 | oc->mode = ce->ce_mode; |
979f7929 | 1418 | free(new_path); |
73b0e5af JH |
1419 | return 0; |
1420 | } | |
e7cef45f | 1421 | pos++; |
73b0e5af | 1422 | } |
2e83b66c | 1423 | if (only_to_die && name[1] && name[1] != '/') |
009fee47 | 1424 | diagnose_invalid_index_path(stage, prefix, cp); |
979f7929 | 1425 | free(new_path); |
73b0e5af JH |
1426 | return -1; |
1427 | } | |
cce91a2c SP |
1428 | for (cp = name, bracket_depth = 0; *cp; cp++) { |
1429 | if (*cp == '{') | |
1430 | bracket_depth++; | |
1431 | else if (bracket_depth && *cp == '}') | |
1432 | bracket_depth--; | |
1433 | else if (!bracket_depth && *cp == ':') | |
1434 | break; | |
1435 | } | |
1436 | if (*cp == ':') { | |
73b0e5af | 1437 | unsigned char tree_sha1[20]; |
b2981d06 RS |
1438 | int len = cp - name; |
1439 | if (!get_sha1_1(name, len, tree_sha1, GET_SHA1_TREEISH)) { | |
009fee47 | 1440 | const char *filename = cp+1; |
979f7929 NTND |
1441 | char *new_filename = NULL; |
1442 | ||
1443 | new_filename = resolve_relative_path(filename); | |
1444 | if (new_filename) | |
1445 | filename = new_filename; | |
c4ec9677 DT |
1446 | if (flags & GET_SHA1_FOLLOW_SYMLINKS) { |
1447 | ret = get_tree_entry_follow_symlinks(tree_sha1, | |
1448 | filename, sha1, &oc->symlink_path, | |
1449 | &oc->mode); | |
1450 | } else { | |
1451 | ret = get_tree_entry(tree_sha1, filename, | |
1452 | sha1, &oc->mode); | |
1453 | if (ret && only_to_die) { | |
1454 | diagnose_invalid_sha1_path(prefix, | |
1455 | filename, | |
1456 | tree_sha1, | |
1457 | name, len); | |
1458 | } | |
009fee47 | 1459 | } |
573285e5 | 1460 | hashcpy(oc->tree, tree_sha1); |
2ce63e9f | 1461 | strlcpy(oc->path, filename, sizeof(oc->path)); |
573285e5 | 1462 | |
979f7929 | 1463 | free(new_filename); |
009fee47 MM |
1464 | return ret; |
1465 | } else { | |
2e83b66c | 1466 | if (only_to_die) |
b2981d06 | 1467 | die("Invalid object name '%.*s'.", len, name); |
009fee47 | 1468 | } |
5119602a LT |
1469 | } |
1470 | return ret; | |
9938af6a | 1471 | } |
f01cc14c | 1472 | |
8c135ea2 JH |
1473 | /* |
1474 | * Call this function when you know "name" given by the end user must | |
1475 | * name an object but it doesn't; the function _may_ die with a better | |
1476 | * diagnostic message than "no such object 'name'", e.g. "Path 'doc' does not | |
1477 | * exist in 'HEAD'" when given "HEAD:doc", or it may return in which case | |
1478 | * you have a chance to diagnose the error further. | |
1479 | */ | |
1480 | void maybe_die_on_misspelt_object_name(const char *name, const char *prefix) | |
f01cc14c JH |
1481 | { |
1482 | struct object_context oc; | |
8c135ea2 | 1483 | unsigned char sha1[20]; |
33bd598c | 1484 | get_sha1_with_context_1(name, GET_SHA1_ONLY_TO_DIE, prefix, sha1, &oc); |
8c135ea2 JH |
1485 | } |
1486 | ||
33bd598c | 1487 | int get_sha1_with_context(const char *str, unsigned flags, unsigned char *sha1, struct object_context *orc) |
f01cc14c | 1488 | { |
c4ec9677 DT |
1489 | if (flags & GET_SHA1_FOLLOW_SYMLINKS && flags & GET_SHA1_ONLY_TO_DIE) |
1490 | die("BUG: incompatible flags for get_sha1_with_context"); | |
33bd598c | 1491 | return get_sha1_with_context_1(str, flags, NULL, sha1, orc); |
f01cc14c | 1492 | } |