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Commit | Line | Data |
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bc052d7f | 1 | #define NO_THE_INDEX_COMPATIBILITY_MACROS |
16da134b | 2 | #include "cache.h" |
f8a9d428 | 3 | #include "dir.h" |
16da134b JS |
4 | #include "tree.h" |
5 | #include "tree-walk.h" | |
076b0adc | 6 | #include "cache-tree.h" |
16da134b | 7 | #include "unpack-trees.h" |
96a02f8f | 8 | #include "progress.h" |
0cf73755 | 9 | #include "refs.h" |
06f33c17 | 10 | #include "attr.h" |
5fc2fc8f | 11 | #include "split-index.h" |
e931371a | 12 | #include "dir.h" |
16da134b | 13 | |
8ccba008 JH |
14 | /* |
15 | * Error messages expected by scripts out of plumbing commands such as | |
16 | * read-tree. Non-scripted Porcelain is not required to use these messages | |
17 | * and in fact are encouraged to reword them to better suit their particular | |
23cbf11b | 18 | * situation better. See how "git checkout" and "git merge" replaces |
dc1166e6 | 19 | * them using setup_unpack_trees_porcelain(), for example. |
8ccba008 | 20 | */ |
c2e86add | 21 | static const char *unpack_plumbing_errors[NB_UNPACK_TREES_ERROR_TYPES] = { |
08353ebb | 22 | /* ERROR_WOULD_OVERWRITE */ |
8ccba008 JH |
23 | "Entry '%s' would be overwritten by merge. Cannot merge.", |
24 | ||
08353ebb | 25 | /* ERROR_NOT_UPTODATE_FILE */ |
8ccba008 JH |
26 | "Entry '%s' not uptodate. Cannot merge.", |
27 | ||
08353ebb | 28 | /* ERROR_NOT_UPTODATE_DIR */ |
8ccba008 JH |
29 | "Updating '%s' would lose untracked files in it", |
30 | ||
08402b04 MM |
31 | /* ERROR_WOULD_LOSE_UNTRACKED_OVERWRITTEN */ |
32 | "Untracked working tree file '%s' would be overwritten by merge.", | |
8ccba008 | 33 | |
08402b04 MM |
34 | /* ERROR_WOULD_LOSE_UNTRACKED_REMOVED */ |
35 | "Untracked working tree file '%s' would be removed by merge.", | |
8ccba008 | 36 | |
08353ebb | 37 | /* ERROR_BIND_OVERLAP */ |
8ccba008 | 38 | "Entry '%s' overlaps with '%s'. Cannot bind.", |
e800ec9d | 39 | |
08353ebb | 40 | /* ERROR_SPARSE_NOT_UPTODATE_FILE */ |
e800ec9d NTND |
41 | "Entry '%s' not uptodate. Cannot update sparse checkout.", |
42 | ||
08402b04 MM |
43 | /* ERROR_WOULD_LOSE_ORPHANED_OVERWRITTEN */ |
44 | "Working tree file '%s' would be overwritten by sparse checkout update.", | |
45 | ||
46 | /* ERROR_WOULD_LOSE_ORPHANED_REMOVED */ | |
47 | "Working tree file '%s' would be removed by sparse checkout update.", | |
8ccba008 JH |
48 | }; |
49 | ||
08353ebb MM |
50 | #define ERRORMSG(o,type) \ |
51 | ( ((o) && (o)->msgs[(type)]) \ | |
52 | ? ((o)->msgs[(type)]) \ | |
53 | : (unpack_plumbing_errors[(type)]) ) | |
8ccba008 | 54 | |
e294030f MM |
55 | void setup_unpack_trees_porcelain(struct unpack_trees_options *opts, |
56 | const char *cmd) | |
dc1166e6 | 57 | { |
7980872d | 58 | int i; |
e294030f | 59 | const char **msgs = opts->msgs; |
dc1166e6 | 60 | const char *msg; |
dc1166e6 | 61 | const char *cmd2 = strcmp(cmd, "checkout") ? cmd : "switch branches"; |
fa3f60b7 | 62 | |
dc1166e6 MM |
63 | if (advice_commit_before_merge) |
64 | msg = "Your local changes to the following files would be overwritten by %s:\n%%s" | |
65 | "Please, commit your changes or stash them before you can %s."; | |
66 | else | |
67 | msg = "Your local changes to the following files would be overwritten by %s:\n%%s"; | |
fa3f60b7 JK |
68 | msgs[ERROR_WOULD_OVERWRITE] = msgs[ERROR_NOT_UPTODATE_FILE] = |
69 | xstrfmt(msg, cmd, cmd2); | |
dc1166e6 MM |
70 | |
71 | msgs[ERROR_NOT_UPTODATE_DIR] = | |
72 | "Updating the following directories would lose untracked files in it:\n%s"; | |
73 | ||
74 | if (advice_commit_before_merge) | |
75 | msg = "The following untracked working tree files would be %s by %s:\n%%s" | |
76 | "Please move or remove them before you can %s."; | |
77 | else | |
78 | msg = "The following untracked working tree files would be %s by %s:\n%%s"; | |
fa3f60b7 JK |
79 | |
80 | msgs[ERROR_WOULD_LOSE_UNTRACKED_REMOVED] = xstrfmt(msg, "removed", cmd, cmd2); | |
81 | msgs[ERROR_WOULD_LOSE_UNTRACKED_OVERWRITTEN] = xstrfmt(msg, "overwritten", cmd, cmd2); | |
dc1166e6 MM |
82 | |
83 | /* | |
84 | * Special case: ERROR_BIND_OVERLAP refers to a pair of paths, we | |
85 | * cannot easily display it as a list. | |
86 | */ | |
87 | msgs[ERROR_BIND_OVERLAP] = "Entry '%s' overlaps with '%s'. Cannot bind."; | |
88 | ||
89 | msgs[ERROR_SPARSE_NOT_UPTODATE_FILE] = | |
90 | "Cannot update sparse checkout: the following entries are not up-to-date:\n%s"; | |
91 | msgs[ERROR_WOULD_LOSE_ORPHANED_OVERWRITTEN] = | |
92 | "The following Working tree files would be overwritten by sparse checkout update:\n%s"; | |
93 | msgs[ERROR_WOULD_LOSE_ORPHANED_REMOVED] = | |
94 | "The following Working tree files would be removed by sparse checkout update:\n%s"; | |
5e65ee35 MM |
95 | |
96 | opts->show_all_errors = 1; | |
7980872d CB |
97 | /* rejected paths may not have a static buffer */ |
98 | for (i = 0; i < ARRAY_SIZE(opts->unpack_rejects); i++) | |
99 | opts->unpack_rejects[i].strdup_strings = 1; | |
dc1166e6 MM |
100 | } |
101 | ||
46169180 | 102 | static int do_add_entry(struct unpack_trees_options *o, struct cache_entry *ce, |
6ff264ee | 103 | unsigned int set, unsigned int clear) |
b48d5a05 | 104 | { |
419a597f | 105 | clear |= CE_HASHED; |
34110cd4 | 106 | |
700e66d6 NTND |
107 | if (set & CE_REMOVE) |
108 | set |= CE_WT_REMOVE; | |
109 | ||
6ff264ee | 110 | ce->ce_flags = (ce->ce_flags & ~clear) | set; |
46169180 JK |
111 | return add_index_entry(&o->result, ce, |
112 | ADD_CACHE_OK_TO_ADD | ADD_CACHE_OK_TO_REPLACE); | |
6ff264ee RS |
113 | } |
114 | ||
a33bd4d3 | 115 | static struct cache_entry *dup_entry(const struct cache_entry *ce) |
6ff264ee RS |
116 | { |
117 | unsigned int size = ce_size(ce); | |
118 | struct cache_entry *new = xmalloc(size); | |
119 | ||
34110cd4 | 120 | memcpy(new, ce, size); |
a33bd4d3 RS |
121 | return new; |
122 | } | |
123 | ||
124 | static void add_entry(struct unpack_trees_options *o, | |
125 | const struct cache_entry *ce, | |
126 | unsigned int set, unsigned int clear) | |
127 | { | |
128 | do_add_entry(o, dup_entry(ce), set, clear); | |
b48d5a05 LT |
129 | } |
130 | ||
e6c111b4 MM |
131 | /* |
132 | * add error messages on path <path> | |
133 | * corresponding to the type <e> with the message <msg> | |
134 | * indicating if it should be display in porcelain or not | |
135 | */ | |
136 | static int add_rejected_path(struct unpack_trees_options *o, | |
137 | enum unpack_trees_error_types e, | |
138 | const char *path) | |
139 | { | |
e6c111b4 MM |
140 | if (!o->show_all_errors) |
141 | return error(ERRORMSG(o, e), path); | |
142 | ||
143 | /* | |
144 | * Otherwise, insert in a list for future display by | |
145 | * display_error_msgs() | |
146 | */ | |
7980872d | 147 | string_list_append(&o->unpack_rejects[e], path); |
e6c111b4 MM |
148 | return -1; |
149 | } | |
150 | ||
e6c111b4 MM |
151 | /* |
152 | * display all the error messages stored in a nice way | |
153 | */ | |
154 | static void display_error_msgs(struct unpack_trees_options *o) | |
155 | { | |
7980872d | 156 | int e, i; |
e6c111b4 MM |
157 | int something_displayed = 0; |
158 | for (e = 0; e < NB_UNPACK_TREES_ERROR_TYPES; e++) { | |
7980872d CB |
159 | struct string_list *rejects = &o->unpack_rejects[e]; |
160 | if (rejects->nr > 0) { | |
e6c111b4 MM |
161 | struct strbuf path = STRBUF_INIT; |
162 | something_displayed = 1; | |
7980872d CB |
163 | for (i = 0; i < rejects->nr; i++) |
164 | strbuf_addf(&path, "\t%s\n", rejects->items[i].string); | |
e6c111b4 MM |
165 | error(ERRORMSG(o, e), path.buf); |
166 | strbuf_release(&path); | |
e6c111b4 | 167 | } |
7980872d | 168 | string_list_clear(rejects, 0); |
e6c111b4 MM |
169 | } |
170 | if (something_displayed) | |
6f90969b | 171 | fprintf(stderr, "Aborting\n"); |
e6c111b4 MM |
172 | } |
173 | ||
78478927 KB |
174 | /* |
175 | * Unlink the last component and schedule the leading directories for | |
176 | * removal, such that empty directories get removed. | |
16da134b | 177 | */ |
9c5e6c80 | 178 | static void unlink_entry(const struct cache_entry *ce) |
16da134b | 179 | { |
f66caaf9 | 180 | if (!check_leading_path(ce->name, ce_namelen(ce))) |
16a4c617 | 181 | return; |
80d706af PC |
182 | if (remove_or_warn(ce->ce_mode, ce->name)) |
183 | return; | |
78478927 | 184 | schedule_dir_for_removal(ce->name, ce_namelen(ce)); |
16da134b JS |
185 | } |
186 | ||
16da134b | 187 | static struct checkout state; |
c4758d3c | 188 | static int check_updates(struct unpack_trees_options *o) |
16da134b | 189 | { |
96a02f8f | 190 | unsigned cnt = 0, total = 0; |
dc6a0757 | 191 | struct progress *progress = NULL; |
34110cd4 | 192 | struct index_state *index = &o->result; |
33ecf7eb | 193 | int i; |
c4758d3c | 194 | int errs = 0; |
16da134b JS |
195 | |
196 | if (o->update && o->verbose_update) { | |
34110cd4 | 197 | for (total = cnt = 0; cnt < index->cache_nr; cnt++) { |
9c5e6c80 | 198 | const struct cache_entry *ce = index->cache[cnt]; |
700e66d6 | 199 | if (ce->ce_flags & (CE_UPDATE | CE_WT_REMOVE)) |
16da134b JS |
200 | total++; |
201 | } | |
202 | ||
754dbc43 | 203 | progress = start_progress_delay(_("Checking out files"), |
e8548645 | 204 | total, 50, 1); |
16da134b JS |
205 | cnt = 0; |
206 | } | |
207 | ||
66985e66 JH |
208 | if (o->update) |
209 | git_attr_set_direction(GIT_ATTR_CHECKOUT, &o->result); | |
34110cd4 | 210 | for (i = 0; i < index->cache_nr; i++) { |
9c5e6c80 | 211 | const struct cache_entry *ce = index->cache[i]; |
16da134b | 212 | |
e663db2f NTND |
213 | if (ce->ce_flags & CE_WT_REMOVE) { |
214 | display_progress(progress, ++cnt); | |
2c9078d0 | 215 | if (o->update && !o->dry_run) |
e663db2f NTND |
216 | unlink_entry(ce); |
217 | continue; | |
218 | } | |
1fa6ead4 | 219 | } |
36419c8e | 220 | remove_marked_cache_entries(&o->result); |
78478927 | 221 | remove_scheduled_dirs(); |
1fa6ead4 LT |
222 | |
223 | for (i = 0; i < index->cache_nr; i++) { | |
224 | struct cache_entry *ce = index->cache[i]; | |
225 | ||
7a51ed66 | 226 | if (ce->ce_flags & CE_UPDATE) { |
1fa6ead4 | 227 | display_progress(progress, ++cnt); |
7a51ed66 | 228 | ce->ce_flags &= ~CE_UPDATE; |
2c9078d0 | 229 | if (o->update && !o->dry_run) { |
c4758d3c | 230 | errs |= checkout_entry(ce, &state, NULL); |
16a4c617 | 231 | } |
16da134b JS |
232 | } |
233 | } | |
4d4fcc54 | 234 | stop_progress(&progress); |
66985e66 JH |
235 | if (o->update) |
236 | git_attr_set_direction(GIT_ATTR_CHECKIN, NULL); | |
c4758d3c | 237 | return errs != 0; |
16da134b JS |
238 | } |
239 | ||
eb9ae4b5 RS |
240 | static int verify_uptodate_sparse(const struct cache_entry *ce, |
241 | struct unpack_trees_options *o); | |
242 | static int verify_absent_sparse(const struct cache_entry *ce, | |
243 | enum unpack_trees_error_types, | |
244 | struct unpack_trees_options *o); | |
e800ec9d | 245 | |
a5c446f1 NTND |
246 | static int apply_sparse_checkout(struct index_state *istate, |
247 | struct cache_entry *ce, | |
248 | struct unpack_trees_options *o) | |
e800ec9d NTND |
249 | { |
250 | int was_skip_worktree = ce_skip_worktree(ce); | |
251 | ||
2431afbf | 252 | if (ce->ce_flags & CE_NEW_SKIP_WORKTREE) |
e800ec9d NTND |
253 | ce->ce_flags |= CE_SKIP_WORKTREE; |
254 | else | |
255 | ce->ce_flags &= ~CE_SKIP_WORKTREE; | |
078a58e8 NTND |
256 | if (was_skip_worktree != ce_skip_worktree(ce)) { |
257 | ce->ce_flags |= CE_UPDATE_IN_BASE; | |
a5c446f1 | 258 | istate->cache_changed |= CE_ENTRY_CHANGED; |
078a58e8 | 259 | } |
e800ec9d NTND |
260 | |
261 | /* | |
eec3fc03 NTND |
262 | * if (!was_skip_worktree && !ce_skip_worktree()) { |
263 | * This is perfectly normal. Move on; | |
264 | * } | |
e800ec9d | 265 | */ |
eec3fc03 NTND |
266 | |
267 | /* | |
268 | * Merge strategies may set CE_UPDATE|CE_REMOVE outside checkout | |
269 | * area as a result of ce_skip_worktree() shortcuts in | |
700e66d6 NTND |
270 | * verify_absent() and verify_uptodate(). |
271 | * Make sure they don't modify worktree if they are already | |
272 | * outside checkout area | |
eec3fc03 | 273 | */ |
700e66d6 NTND |
274 | if (was_skip_worktree && ce_skip_worktree(ce)) { |
275 | ce->ce_flags &= ~CE_UPDATE; | |
276 | ||
277 | /* | |
278 | * By default, when CE_REMOVE is on, CE_WT_REMOVE is also | |
279 | * on to get that file removed from both index and worktree. | |
280 | * If that file is already outside worktree area, don't | |
281 | * bother remove it. | |
282 | */ | |
283 | if (ce->ce_flags & CE_REMOVE) | |
284 | ce->ce_flags &= ~CE_WT_REMOVE; | |
285 | } | |
e800ec9d NTND |
286 | |
287 | if (!was_skip_worktree && ce_skip_worktree(ce)) { | |
288 | /* | |
289 | * If CE_UPDATE is set, verify_uptodate() must be called already | |
290 | * also stat info may have lost after merged_entry() so calling | |
291 | * verify_uptodate() again may fail | |
292 | */ | |
293 | if (!(ce->ce_flags & CE_UPDATE) && verify_uptodate_sparse(ce, o)) | |
294 | return -1; | |
295 | ce->ce_flags |= CE_WT_REMOVE; | |
296 | } | |
297 | if (was_skip_worktree && !ce_skip_worktree(ce)) { | |
08402b04 | 298 | if (verify_absent_sparse(ce, ERROR_WOULD_LOSE_UNTRACKED_OVERWRITTEN, o)) |
e800ec9d NTND |
299 | return -1; |
300 | ce->ce_flags |= CE_UPDATE; | |
301 | } | |
302 | return 0; | |
303 | } | |
304 | ||
5828e835 RS |
305 | static inline int call_unpack_fn(const struct cache_entry * const *src, |
306 | struct unpack_trees_options *o) | |
01904572 | 307 | { |
34110cd4 LT |
308 | int ret = o->fn(src, o); |
309 | if (ret > 0) | |
01904572 | 310 | ret = 0; |
01904572 LT |
311 | return ret; |
312 | } | |
313 | ||
da165f47 JH |
314 | static void mark_ce_used(struct cache_entry *ce, struct unpack_trees_options *o) |
315 | { | |
316 | ce->ce_flags |= CE_UNPACKED; | |
317 | ||
318 | if (o->cache_bottom < o->src_index->cache_nr && | |
319 | o->src_index->cache[o->cache_bottom] == ce) { | |
320 | int bottom = o->cache_bottom; | |
321 | while (bottom < o->src_index->cache_nr && | |
322 | o->src_index->cache[bottom]->ce_flags & CE_UNPACKED) | |
323 | bottom++; | |
324 | o->cache_bottom = bottom; | |
325 | } | |
326 | } | |
327 | ||
328 | static void mark_all_ce_unused(struct index_state *index) | |
329 | { | |
330 | int i; | |
331 | for (i = 0; i < index->cache_nr; i++) | |
2431afbf | 332 | index->cache[i]->ce_flags &= ~(CE_UNPACKED | CE_ADDED | CE_NEW_SKIP_WORKTREE); |
da165f47 JH |
333 | } |
334 | ||
eb9ae4b5 | 335 | static int locate_in_src_index(const struct cache_entry *ce, |
da165f47 JH |
336 | struct unpack_trees_options *o) |
337 | { | |
338 | struct index_state *index = o->src_index; | |
339 | int len = ce_namelen(ce); | |
340 | int pos = index_name_pos(index, ce->name, len); | |
341 | if (pos < 0) | |
342 | pos = -1 - pos; | |
343 | return pos; | |
344 | } | |
345 | ||
346 | /* | |
347 | * We call unpack_index_entry() with an unmerged cache entry | |
348 | * only in diff-index, and it wants a single callback. Skip | |
349 | * the other unmerged entry with the same name. | |
350 | */ | |
351 | static void mark_ce_used_same_name(struct cache_entry *ce, | |
352 | struct unpack_trees_options *o) | |
353 | { | |
354 | struct index_state *index = o->src_index; | |
355 | int len = ce_namelen(ce); | |
356 | int pos; | |
357 | ||
358 | for (pos = locate_in_src_index(ce, o); pos < index->cache_nr; pos++) { | |
359 | struct cache_entry *next = index->cache[pos]; | |
360 | if (len != ce_namelen(next) || | |
361 | memcmp(ce->name, next->name, len)) | |
362 | break; | |
363 | mark_ce_used(next, o); | |
364 | } | |
365 | } | |
366 | ||
367 | static struct cache_entry *next_cache_entry(struct unpack_trees_options *o) | |
368 | { | |
369 | const struct index_state *index = o->src_index; | |
370 | int pos = o->cache_bottom; | |
371 | ||
372 | while (pos < index->cache_nr) { | |
373 | struct cache_entry *ce = index->cache[pos]; | |
374 | if (!(ce->ce_flags & CE_UNPACKED)) | |
375 | return ce; | |
376 | pos++; | |
377 | } | |
378 | return NULL; | |
379 | } | |
380 | ||
9c5e6c80 | 381 | static void add_same_unmerged(const struct cache_entry *ce, |
da165f47 JH |
382 | struct unpack_trees_options *o) |
383 | { | |
384 | struct index_state *index = o->src_index; | |
385 | int len = ce_namelen(ce); | |
386 | int pos = index_name_pos(index, ce->name, len); | |
387 | ||
388 | if (0 <= pos) | |
389 | die("programming error in a caller of mark_ce_used_same_name"); | |
390 | for (pos = -pos - 1; pos < index->cache_nr; pos++) { | |
391 | struct cache_entry *next = index->cache[pos]; | |
392 | if (len != ce_namelen(next) || | |
393 | memcmp(ce->name, next->name, len)) | |
394 | break; | |
395 | add_entry(o, next, 0, 0); | |
396 | mark_ce_used(next, o); | |
397 | } | |
398 | } | |
399 | ||
400 | static int unpack_index_entry(struct cache_entry *ce, | |
401 | struct unpack_trees_options *o) | |
01904572 | 402 | { |
5828e835 | 403 | const struct cache_entry *src[MAX_UNPACK_TREES + 1] = { NULL, }; |
da165f47 | 404 | int ret; |
34110cd4 | 405 | |
66dbfd55 GV |
406 | src[0] = ce; |
407 | ||
da165f47 | 408 | mark_ce_used(ce, o); |
01904572 LT |
409 | if (ce_stage(ce)) { |
410 | if (o->skip_unmerged) { | |
34110cd4 LT |
411 | add_entry(o, ce, 0, 0); |
412 | return 0; | |
01904572 | 413 | } |
01904572 | 414 | } |
da165f47 JH |
415 | ret = call_unpack_fn(src, o); |
416 | if (ce_stage(ce)) | |
417 | mark_ce_used_same_name(ce, o); | |
418 | return ret; | |
01904572 LT |
419 | } |
420 | ||
730f7284 JH |
421 | static int find_cache_pos(struct traverse_info *, const struct name_entry *); |
422 | ||
423 | static void restore_cache_bottom(struct traverse_info *info, int bottom) | |
424 | { | |
425 | struct unpack_trees_options *o = info->data; | |
426 | ||
427 | if (o->diff_index_cached) | |
428 | return; | |
429 | o->cache_bottom = bottom; | |
430 | } | |
431 | ||
432 | static int switch_cache_bottom(struct traverse_info *info) | |
433 | { | |
434 | struct unpack_trees_options *o = info->data; | |
435 | int ret, pos; | |
436 | ||
437 | if (o->diff_index_cached) | |
438 | return 0; | |
439 | ret = o->cache_bottom; | |
440 | pos = find_cache_pos(info->prev, &info->name); | |
441 | ||
442 | if (pos < -1) | |
443 | o->cache_bottom = -2 - pos; | |
444 | else if (pos < 0) | |
445 | o->cache_bottom = o->src_index->cache_nr; | |
446 | return ret; | |
01904572 LT |
447 | } |
448 | ||
84563a62 JH |
449 | static int traverse_trees_recursive(int n, unsigned long dirmask, |
450 | unsigned long df_conflicts, | |
451 | struct name_entry *names, | |
452 | struct traverse_info *info) | |
16da134b | 453 | { |
730f7284 | 454 | int i, ret, bottom; |
ca885a4f | 455 | struct tree_desc t[MAX_UNPACK_TREES]; |
1ce584b0 | 456 | void *buf[MAX_UNPACK_TREES]; |
01904572 LT |
457 | struct traverse_info newinfo; |
458 | struct name_entry *p; | |
459 | ||
460 | p = names; | |
461 | while (!p->mode) | |
462 | p++; | |
463 | ||
464 | newinfo = *info; | |
465 | newinfo.prev = info; | |
40e37256 | 466 | newinfo.pathspec = info->pathspec; |
01904572 | 467 | newinfo.name = *p; |
0de16337 | 468 | newinfo.pathlen += tree_entry_len(p) + 1; |
603d2498 | 469 | newinfo.df_conflicts |= df_conflicts; |
01904572 LT |
470 | |
471 | for (i = 0; i < n; i++, dirmask >>= 1) { | |
472 | const unsigned char *sha1 = NULL; | |
473 | if (dirmask & 1) | |
474 | sha1 = names[i].sha1; | |
1ce584b0 | 475 | buf[i] = fill_tree_descriptor(t+i, sha1); |
01904572 | 476 | } |
730f7284 JH |
477 | |
478 | bottom = switch_cache_bottom(&newinfo); | |
479 | ret = traverse_trees(n, t, &newinfo); | |
480 | restore_cache_bottom(&newinfo, bottom); | |
1ce584b0 JN |
481 | |
482 | for (i = 0; i < n; i++) | |
483 | free(buf[i]); | |
484 | ||
730f7284 | 485 | return ret; |
01904572 LT |
486 | } |
487 | ||
488 | /* | |
489 | * Compare the traverse-path to the cache entry without actually | |
490 | * having to generate the textual representation of the traverse | |
491 | * path. | |
492 | * | |
493 | * NOTE! This *only* compares up to the size of the traverse path | |
494 | * itself - the caller needs to do the final check for the cache | |
495 | * entry having more data at the end! | |
496 | */ | |
497 | static int do_compare_entry(const struct cache_entry *ce, const struct traverse_info *info, const struct name_entry *n) | |
498 | { | |
499 | int len, pathlen, ce_len; | |
500 | const char *ce_name; | |
501 | ||
502 | if (info->prev) { | |
503 | int cmp = do_compare_entry(ce, info->prev, &info->name); | |
504 | if (cmp) | |
505 | return cmp; | |
506 | } | |
507 | pathlen = info->pathlen; | |
508 | ce_len = ce_namelen(ce); | |
509 | ||
510 | /* If ce_len < pathlen then we must have previously hit "name == directory" entry */ | |
511 | if (ce_len < pathlen) | |
512 | return -1; | |
513 | ||
514 | ce_len -= pathlen; | |
515 | ce_name = ce->name + pathlen; | |
516 | ||
0de16337 | 517 | len = tree_entry_len(n); |
01904572 LT |
518 | return df_name_compare(ce_name, ce_len, S_IFREG, n->path, len, n->mode); |
519 | } | |
520 | ||
521 | static int compare_entry(const struct cache_entry *ce, const struct traverse_info *info, const struct name_entry *n) | |
522 | { | |
523 | int cmp = do_compare_entry(ce, info, n); | |
524 | if (cmp) | |
525 | return cmp; | |
526 | ||
527 | /* | |
528 | * Even if the beginning compared identically, the ce should | |
529 | * compare as bigger than a directory leading up to it! | |
530 | */ | |
531 | return ce_namelen(ce) > traverse_path_len(info, n); | |
532 | } | |
533 | ||
da165f47 JH |
534 | static int ce_in_traverse_path(const struct cache_entry *ce, |
535 | const struct traverse_info *info) | |
536 | { | |
537 | if (!info->prev) | |
538 | return 1; | |
539 | if (do_compare_entry(ce, info->prev, &info->name)) | |
540 | return 0; | |
541 | /* | |
542 | * If ce (blob) is the same name as the path (which is a tree | |
543 | * we will be descending into), it won't be inside it. | |
544 | */ | |
545 | return (info->pathlen < ce_namelen(ce)); | |
546 | } | |
547 | ||
01904572 LT |
548 | static struct cache_entry *create_ce_entry(const struct traverse_info *info, const struct name_entry *n, int stage) |
549 | { | |
550 | int len = traverse_path_len(info, n); | |
551 | struct cache_entry *ce = xcalloc(1, cache_entry_size(len)); | |
552 | ||
553 | ce->ce_mode = create_ce_mode(n->mode); | |
b60e188c TG |
554 | ce->ce_flags = create_ce_flags(stage); |
555 | ce->ce_namelen = len; | |
01904572 LT |
556 | hashcpy(ce->sha1, n->sha1); |
557 | make_traverse_path(ce->name, info, n); | |
558 | ||
559 | return ce; | |
560 | } | |
561 | ||
c7cddc1a RS |
562 | static int unpack_nondirectories(int n, unsigned long mask, |
563 | unsigned long dirmask, | |
564 | struct cache_entry **src, | |
565 | const struct name_entry *names, | |
566 | const struct traverse_info *info) | |
01904572 LT |
567 | { |
568 | int i; | |
569 | struct unpack_trees_options *o = info->data; | |
603d2498 | 570 | unsigned long conflicts = info->df_conflicts | dirmask; |
01904572 LT |
571 | |
572 | /* Do we have *only* directories? Nothing to do */ | |
573 | if (mask == dirmask && !src[0]) | |
574 | return 0; | |
575 | ||
01904572 LT |
576 | /* |
577 | * Ok, we've filled in up to any potential index entry in src[0], | |
578 | * now do the rest. | |
579 | */ | |
580 | for (i = 0; i < n; i++) { | |
581 | int stage; | |
582 | unsigned int bit = 1ul << i; | |
583 | if (conflicts & bit) { | |
584 | src[i + o->merge] = o->df_conflict_entry; | |
585 | continue; | |
586 | } | |
587 | if (!(mask & bit)) | |
588 | continue; | |
589 | if (!o->merge) | |
590 | stage = 0; | |
591 | else if (i + 1 < o->head_idx) | |
592 | stage = 1; | |
593 | else if (i + 1 > o->head_idx) | |
594 | stage = 3; | |
595 | else | |
596 | stage = 2; | |
597 | src[i + o->merge] = create_ce_entry(info, names + i, stage); | |
598 | } | |
599 | ||
5d80ef5a RS |
600 | if (o->merge) { |
601 | int rc = call_unpack_fn((const struct cache_entry * const *)src, | |
602 | o); | |
603 | for (i = 0; i < n; i++) { | |
604 | struct cache_entry *ce = src[i + o->merge]; | |
605 | if (ce != o->df_conflict_entry) | |
606 | free(ce); | |
607 | } | |
608 | return rc; | |
609 | } | |
01904572 | 610 | |
01904572 | 611 | for (i = 0; i < n; i++) |
aab3b9a1 | 612 | if (src[i] && src[i] != o->df_conflict_entry) |
46169180 JK |
613 | if (do_add_entry(o, src[i], 0, 0)) |
614 | return -1; | |
615 | ||
01904572 LT |
616 | return 0; |
617 | } | |
618 | ||
353c5eeb JH |
619 | static int unpack_failed(struct unpack_trees_options *o, const char *message) |
620 | { | |
621 | discard_index(&o->result); | |
b4194828 | 622 | if (!o->gently && !o->exiting_early) { |
353c5eeb JH |
623 | if (message) |
624 | return error("%s", message); | |
625 | return -1; | |
626 | } | |
627 | return -1; | |
628 | } | |
629 | ||
730f7284 JH |
630 | /* |
631 | * The tree traversal is looking at name p. If we have a matching entry, | |
632 | * return it. If name p is a directory in the index, do not return | |
633 | * anything, as we will want to match it when the traversal descends into | |
634 | * the directory. | |
635 | */ | |
636 | static int find_cache_pos(struct traverse_info *info, | |
637 | const struct name_entry *p) | |
638 | { | |
639 | int pos; | |
640 | struct unpack_trees_options *o = info->data; | |
641 | struct index_state *index = o->src_index; | |
642 | int pfxlen = info->pathlen; | |
0de16337 | 643 | int p_len = tree_entry_len(p); |
730f7284 JH |
644 | |
645 | for (pos = o->cache_bottom; pos < index->cache_nr; pos++) { | |
9c5e6c80 | 646 | const struct cache_entry *ce = index->cache[pos]; |
730f7284 JH |
647 | const char *ce_name, *ce_slash; |
648 | int cmp, ce_len; | |
649 | ||
e53e6b44 BD |
650 | if (ce->ce_flags & CE_UNPACKED) { |
651 | /* | |
652 | * cache_bottom entry is already unpacked, so | |
653 | * we can never match it; don't check it | |
654 | * again. | |
655 | */ | |
656 | if (pos == o->cache_bottom) | |
657 | ++o->cache_bottom; | |
730f7284 | 658 | continue; |
e53e6b44 BD |
659 | } |
660 | if (!ce_in_traverse_path(ce, info)) | |
730f7284 JH |
661 | continue; |
662 | ce_name = ce->name + pfxlen; | |
663 | ce_slash = strchr(ce_name, '/'); | |
664 | if (ce_slash) | |
665 | ce_len = ce_slash - ce_name; | |
666 | else | |
667 | ce_len = ce_namelen(ce) - pfxlen; | |
668 | cmp = name_compare(p->path, p_len, ce_name, ce_len); | |
669 | /* | |
670 | * Exact match; if we have a directory we need to | |
671 | * delay returning it. | |
672 | */ | |
673 | if (!cmp) | |
674 | return ce_slash ? -2 - pos : pos; | |
675 | if (0 < cmp) | |
676 | continue; /* keep looking */ | |
677 | /* | |
678 | * ce_name sorts after p->path; could it be that we | |
679 | * have files under p->path directory in the index? | |
680 | * E.g. ce_name == "t-i", and p->path == "t"; we may | |
681 | * have "t/a" in the index. | |
682 | */ | |
683 | if (p_len < ce_len && !memcmp(ce_name, p->path, p_len) && | |
684 | ce_name[p_len] < '/') | |
685 | continue; /* keep looking */ | |
686 | break; | |
687 | } | |
688 | return -1; | |
689 | } | |
690 | ||
691 | static struct cache_entry *find_cache_entry(struct traverse_info *info, | |
692 | const struct name_entry *p) | |
693 | { | |
694 | int pos = find_cache_pos(info, p); | |
695 | struct unpack_trees_options *o = info->data; | |
696 | ||
697 | if (0 <= pos) | |
698 | return o->src_index->cache[pos]; | |
699 | else | |
700 | return NULL; | |
701 | } | |
702 | ||
ba655da5 JH |
703 | static void debug_path(struct traverse_info *info) |
704 | { | |
705 | if (info->prev) { | |
706 | debug_path(info->prev); | |
707 | if (*info->prev->name.path) | |
708 | putchar('/'); | |
709 | } | |
710 | printf("%s", info->name.path); | |
711 | } | |
712 | ||
713 | static void debug_name_entry(int i, struct name_entry *n) | |
714 | { | |
715 | printf("ent#%d %06o %s\n", i, | |
716 | n->path ? n->mode : 0, | |
717 | n->path ? n->path : "(missing)"); | |
718 | } | |
719 | ||
720 | static void debug_unpack_callback(int n, | |
721 | unsigned long mask, | |
722 | unsigned long dirmask, | |
723 | struct name_entry *names, | |
724 | struct traverse_info *info) | |
725 | { | |
726 | int i; | |
727 | printf("* unpack mask %lu, dirmask %lu, cnt %d ", | |
728 | mask, dirmask, n); | |
729 | debug_path(info); | |
730 | putchar('\n'); | |
731 | for (i = 0; i < n; i++) | |
732 | debug_name_entry(i, names + i); | |
733 | } | |
734 | ||
01904572 LT |
735 | static int unpack_callback(int n, unsigned long mask, unsigned long dirmask, struct name_entry *names, struct traverse_info *info) |
736 | { | |
c7cddc1a | 737 | struct cache_entry *src[MAX_UNPACK_TREES + 1] = { NULL, }; |
01904572 | 738 | struct unpack_trees_options *o = info->data; |
01904572 LT |
739 | const struct name_entry *p = names; |
740 | ||
741 | /* Find first entry with a real name (we could use "mask" too) */ | |
742 | while (!p->mode) | |
743 | p++; | |
744 | ||
ba655da5 JH |
745 | if (o->debug_unpack) |
746 | debug_unpack_callback(n, mask, dirmask, names, info); | |
747 | ||
01904572 LT |
748 | /* Are we supposed to look at the index too? */ |
749 | if (o->merge) { | |
da165f47 | 750 | while (1) { |
da165f47 | 751 | int cmp; |
730f7284 JH |
752 | struct cache_entry *ce; |
753 | ||
754 | if (o->diff_index_cached) | |
755 | ce = next_cache_entry(o); | |
756 | else | |
757 | ce = find_cache_entry(info, p); | |
758 | ||
da165f47 JH |
759 | if (!ce) |
760 | break; | |
761 | cmp = compare_entry(ce, info, p); | |
01904572 LT |
762 | if (cmp < 0) { |
763 | if (unpack_index_entry(ce, o) < 0) | |
353c5eeb | 764 | return unpack_failed(o, NULL); |
01904572 LT |
765 | continue; |
766 | } | |
767 | if (!cmp) { | |
768 | if (ce_stage(ce)) { | |
769 | /* | |
da165f47 JH |
770 | * If we skip unmerged index |
771 | * entries, we'll skip this | |
772 | * entry *and* the tree | |
773 | * entries associated with it! | |
01904572 | 774 | */ |
34110cd4 | 775 | if (o->skip_unmerged) { |
da165f47 | 776 | add_same_unmerged(ce, o); |
01904572 | 777 | return mask; |
34110cd4 | 778 | } |
01904572 LT |
779 | } |
780 | src[0] = ce; | |
01904572 LT |
781 | } |
782 | break; | |
783 | } | |
784 | } | |
785 | ||
34110cd4 | 786 | if (unpack_nondirectories(n, mask, dirmask, src, names, info) < 0) |
01904572 LT |
787 | return -1; |
788 | ||
97e5954b | 789 | if (o->merge && src[0]) { |
da165f47 JH |
790 | if (ce_stage(src[0])) |
791 | mark_ce_used_same_name(src[0], o); | |
792 | else | |
793 | mark_ce_used(src[0], o); | |
794 | } | |
795 | ||
01904572 LT |
796 | /* Now handle any directories.. */ |
797 | if (dirmask) { | |
b65982b6 JH |
798 | /* special case: "diff-index --cached" looking at a tree */ |
799 | if (o->diff_index_cached && | |
800 | n == 1 && dirmask == 1 && S_ISDIR(names->mode)) { | |
801 | int matches; | |
802 | matches = cache_tree_matches_traversal(o->src_index->cache_tree, | |
803 | names, info); | |
804 | /* | |
da165f47 JH |
805 | * Everything under the name matches; skip the |
806 | * entire hierarchy. diff_index_cached codepath | |
807 | * special cases D/F conflicts in such a way that | |
808 | * it does not do any look-ahead, so this is safe. | |
b65982b6 JH |
809 | */ |
810 | if (matches) { | |
da165f47 | 811 | o->cache_bottom += matches; |
b65982b6 JH |
812 | return mask; |
813 | } | |
814 | } | |
815 | ||
603d2498 | 816 | if (traverse_trees_recursive(n, dirmask, mask & ~dirmask, |
542c264b JH |
817 | names, info) < 0) |
818 | return -1; | |
01904572 LT |
819 | return mask; |
820 | } | |
821 | ||
822 | return mask; | |
823 | } | |
824 | ||
28911091 | 825 | static int clear_ce_flags_1(struct cache_entry **cache, int nr, |
fc2b6214 | 826 | struct strbuf *prefix, |
28911091 NTND |
827 | int select_mask, int clear_mask, |
828 | struct exclude_list *el, int defval); | |
829 | ||
9037026d NTND |
830 | /* Whole directory matching */ |
831 | static int clear_ce_flags_dir(struct cache_entry **cache, int nr, | |
fc2b6214 | 832 | struct strbuf *prefix, |
9037026d NTND |
833 | char *basename, |
834 | int select_mask, int clear_mask, | |
28911091 | 835 | struct exclude_list *el, int defval) |
9037026d | 836 | { |
28911091 | 837 | struct cache_entry **cache_end; |
9037026d | 838 | int dtype = DT_DIR; |
fc2b6214 | 839 | int ret = is_excluded_from_list(prefix->buf, prefix->len, |
07958050 | 840 | basename, &dtype, el); |
fc2b6214 | 841 | int rc; |
9037026d | 842 | |
fc2b6214 | 843 | strbuf_addch(prefix, '/'); |
9037026d | 844 | |
28911091 NTND |
845 | /* If undecided, use matching result of parent dir in defval */ |
846 | if (ret < 0) | |
847 | ret = defval; | |
9037026d | 848 | |
28911091 NTND |
849 | for (cache_end = cache; cache_end != cache + nr; cache_end++) { |
850 | struct cache_entry *ce = *cache_end; | |
fc2b6214 | 851 | if (strncmp(ce->name, prefix->buf, prefix->len)) |
28911091 | 852 | break; |
9037026d NTND |
853 | } |
854 | ||
28911091 NTND |
855 | /* |
856 | * TODO: check el, if there are no patterns that may conflict | |
857 | * with ret (iow, we know in advance the incl/excl | |
858 | * decision for the entire directory), clear flag here without | |
859 | * calling clear_ce_flags_1(). That function will call | |
07958050 | 860 | * the expensive is_excluded_from_list() on every entry. |
28911091 | 861 | */ |
fc2b6214 AP |
862 | rc = clear_ce_flags_1(cache, cache_end - cache, |
863 | prefix, | |
864 | select_mask, clear_mask, | |
865 | el, ret); | |
866 | strbuf_setlen(prefix, prefix->len - 1); | |
867 | return rc; | |
9037026d NTND |
868 | } |
869 | ||
870 | /* | |
871 | * Traverse the index, find every entry that matches according to | |
872 | * o->el. Do "ce_flags &= ~clear_mask" on those entries. Return the | |
873 | * number of traversed entries. | |
874 | * | |
875 | * If select_mask is non-zero, only entries whose ce_flags has on of | |
876 | * those bits enabled are traversed. | |
877 | * | |
878 | * cache : pointer to an index entry | |
879 | * prefix_len : an offset to its path | |
880 | * | |
881 | * The current path ("prefix") including the trailing '/' is | |
882 | * cache[0]->name[0..(prefix_len-1)] | |
883 | * Top level path has prefix_len zero. | |
884 | */ | |
885 | static int clear_ce_flags_1(struct cache_entry **cache, int nr, | |
fc2b6214 | 886 | struct strbuf *prefix, |
9037026d | 887 | int select_mask, int clear_mask, |
28911091 | 888 | struct exclude_list *el, int defval) |
9037026d NTND |
889 | { |
890 | struct cache_entry **cache_end = cache + nr; | |
891 | ||
892 | /* | |
893 | * Process all entries that have the given prefix and meet | |
894 | * select_mask condition | |
895 | */ | |
896 | while(cache != cache_end) { | |
897 | struct cache_entry *ce = *cache; | |
898 | const char *name, *slash; | |
28911091 | 899 | int len, dtype, ret; |
9037026d NTND |
900 | |
901 | if (select_mask && !(ce->ce_flags & select_mask)) { | |
902 | cache++; | |
903 | continue; | |
904 | } | |
905 | ||
fc2b6214 | 906 | if (prefix->len && strncmp(ce->name, prefix->buf, prefix->len)) |
9037026d NTND |
907 | break; |
908 | ||
fc2b6214 | 909 | name = ce->name + prefix->len; |
9037026d NTND |
910 | slash = strchr(name, '/'); |
911 | ||
912 | /* If it's a directory, try whole directory match first */ | |
913 | if (slash) { | |
914 | int processed; | |
915 | ||
916 | len = slash - name; | |
fc2b6214 | 917 | strbuf_add(prefix, name, len); |
9037026d | 918 | |
9037026d | 919 | processed = clear_ce_flags_dir(cache, cache_end - cache, |
fc2b6214 AP |
920 | prefix, |
921 | prefix->buf + prefix->len - len, | |
9037026d | 922 | select_mask, clear_mask, |
28911091 | 923 | el, defval); |
9037026d NTND |
924 | |
925 | /* clear_c_f_dir eats a whole dir already? */ | |
926 | if (processed) { | |
927 | cache += processed; | |
fc2b6214 | 928 | strbuf_setlen(prefix, prefix->len - len); |
9037026d NTND |
929 | continue; |
930 | } | |
931 | ||
fc2b6214 | 932 | strbuf_addch(prefix, '/'); |
9037026d | 933 | cache += clear_ce_flags_1(cache, cache_end - cache, |
fc2b6214 | 934 | prefix, |
28911091 | 935 | select_mask, clear_mask, el, defval); |
fc2b6214 | 936 | strbuf_setlen(prefix, prefix->len - len - 1); |
9037026d NTND |
937 | continue; |
938 | } | |
939 | ||
940 | /* Non-directory */ | |
941 | dtype = ce_to_dtype(ce); | |
07958050 AS |
942 | ret = is_excluded_from_list(ce->name, ce_namelen(ce), |
943 | name, &dtype, el); | |
28911091 NTND |
944 | if (ret < 0) |
945 | ret = defval; | |
946 | if (ret > 0) | |
9037026d NTND |
947 | ce->ce_flags &= ~clear_mask; |
948 | cache++; | |
949 | } | |
950 | return nr - (cache_end - cache); | |
951 | } | |
952 | ||
953 | static int clear_ce_flags(struct cache_entry **cache, int nr, | |
954 | int select_mask, int clear_mask, | |
955 | struct exclude_list *el) | |
956 | { | |
fc2b6214 AP |
957 | static struct strbuf prefix = STRBUF_INIT; |
958 | ||
959 | strbuf_reset(&prefix); | |
960 | ||
9037026d | 961 | return clear_ce_flags_1(cache, nr, |
fc2b6214 | 962 | &prefix, |
9037026d | 963 | select_mask, clear_mask, |
28911091 | 964 | el, 0); |
9037026d NTND |
965 | } |
966 | ||
2431afbf NTND |
967 | /* |
968 | * Set/Clear CE_NEW_SKIP_WORKTREE according to $GIT_DIR/info/sparse-checkout | |
969 | */ | |
970 | static void mark_new_skip_worktree(struct exclude_list *el, | |
971 | struct index_state *the_index, | |
972 | int select_flag, int skip_wt_flag) | |
973 | { | |
974 | int i; | |
975 | ||
9037026d NTND |
976 | /* |
977 | * 1. Pretend the narrowest worktree: only unmerged entries | |
978 | * are checked out | |
979 | */ | |
2431afbf NTND |
980 | for (i = 0; i < the_index->cache_nr; i++) { |
981 | struct cache_entry *ce = the_index->cache[i]; | |
982 | ||
983 | if (select_flag && !(ce->ce_flags & select_flag)) | |
984 | continue; | |
985 | ||
9037026d | 986 | if (!ce_stage(ce)) |
2431afbf NTND |
987 | ce->ce_flags |= skip_wt_flag; |
988 | else | |
989 | ce->ce_flags &= ~skip_wt_flag; | |
990 | } | |
9037026d NTND |
991 | |
992 | /* | |
993 | * 2. Widen worktree according to sparse-checkout file. | |
994 | * Matched entries will have skip_wt_flag cleared (i.e. "in") | |
995 | */ | |
996 | clear_ce_flags(the_index->cache, the_index->cache_nr, | |
997 | select_flag, skip_wt_flag, el); | |
2431afbf NTND |
998 | } |
999 | ||
eb9ae4b5 RS |
1000 | static int verify_absent(const struct cache_entry *, |
1001 | enum unpack_trees_error_types, | |
1002 | struct unpack_trees_options *); | |
2e2b887d JH |
1003 | /* |
1004 | * N-way merge "len" trees. Returns 0 on success, -1 on failure to manipulate the | |
1005 | * resulting index, -2 on failure to reflect the changes to the work tree. | |
2431afbf NTND |
1006 | * |
1007 | * CE_ADDED, CE_UNPACKED and CE_NEW_SKIP_WORKTREE are used internally | |
2e2b887d | 1008 | */ |
01904572 LT |
1009 | int unpack_trees(unsigned len, struct tree_desc *t, struct unpack_trees_options *o) |
1010 | { | |
e800ec9d | 1011 | int i, ret; |
0fb1eaa8 | 1012 | static struct cache_entry *dfc; |
08aefc9e | 1013 | struct exclude_list el; |
16da134b | 1014 | |
ca885a4f JH |
1015 | if (len > MAX_UNPACK_TREES) |
1016 | die("unpack_trees takes at most %d trees", MAX_UNPACK_TREES); | |
076b0adc | 1017 | memset(&state, 0, sizeof(state)); |
16da134b JS |
1018 | state.base_dir = ""; |
1019 | state.force = 1; | |
1020 | state.quiet = 1; | |
1021 | state.refresh_cache = 1; | |
d4a2024a | 1022 | state.istate = &o->result; |
16da134b | 1023 | |
08aefc9e NTND |
1024 | memset(&el, 0, sizeof(el)); |
1025 | if (!core_apply_sparse_checkout || !o->update) | |
1026 | o->skip_sparse_checkout = 1; | |
1027 | if (!o->skip_sparse_checkout) { | |
c082df24 | 1028 | if (add_excludes_from_file_to_list(git_path("info/sparse-checkout"), "", 0, &el, 0) < 0) |
08aefc9e NTND |
1029 | o->skip_sparse_checkout = 1; |
1030 | else | |
1031 | o->el = ⪙ | |
1032 | } | |
1033 | ||
34110cd4 | 1034 | memset(&o->result, 0, sizeof(o->result)); |
913e0e99 | 1035 | o->result.initialized = 1; |
da165f47 JH |
1036 | o->result.timestamp.sec = o->src_index->timestamp.sec; |
1037 | o->result.timestamp.nsec = o->src_index->timestamp.nsec; | |
9170c7ab | 1038 | o->result.version = o->src_index->version; |
5fc2fc8f NTND |
1039 | o->result.split_index = o->src_index->split_index; |
1040 | if (o->result.split_index) | |
1041 | o->result.split_index->refcount++; | |
e93021b2 | 1042 | hashcpy(o->result.sha1, o->src_index->sha1); |
16da134b | 1043 | o->merge_size = len; |
da165f47 | 1044 | mark_all_ce_unused(o->src_index); |
0fb1eaa8 | 1045 | |
2431afbf NTND |
1046 | /* |
1047 | * Sparse checkout loop #1: set NEW_SKIP_WORKTREE on existing entries | |
1048 | */ | |
1049 | if (!o->skip_sparse_checkout) | |
1050 | mark_new_skip_worktree(o->el, o->src_index, 0, CE_NEW_SKIP_WORKTREE); | |
1051 | ||
0fb1eaa8 | 1052 | if (!dfc) |
13494ed1 | 1053 | dfc = xcalloc(1, cache_entry_size(0)); |
0fb1eaa8 | 1054 | o->df_conflict_entry = dfc; |
16da134b JS |
1055 | |
1056 | if (len) { | |
01904572 LT |
1057 | const char *prefix = o->prefix ? o->prefix : ""; |
1058 | struct traverse_info info; | |
1059 | ||
1060 | setup_traverse_info(&info, prefix); | |
1061 | info.fn = unpack_callback; | |
1062 | info.data = o; | |
e6c111b4 | 1063 | info.show_all_errors = o->show_all_errors; |
40e37256 | 1064 | info.pathspec = o->pathspec; |
01904572 | 1065 | |
da165f47 JH |
1066 | if (o->prefix) { |
1067 | /* | |
1068 | * Unpack existing index entries that sort before the | |
1069 | * prefix the tree is spliced into. Note that o->merge | |
1070 | * is always true in this case. | |
1071 | */ | |
1072 | while (1) { | |
1073 | struct cache_entry *ce = next_cache_entry(o); | |
1074 | if (!ce) | |
1075 | break; | |
1076 | if (ce_in_traverse_path(ce, &info)) | |
1077 | break; | |
1078 | if (unpack_index_entry(ce, o) < 0) | |
1079 | goto return_failed; | |
1080 | } | |
08aefc9e | 1081 | } |
da165f47 | 1082 | |
01904572 | 1083 | if (traverse_trees(len, t, &info) < 0) |
da165f47 | 1084 | goto return_failed; |
16da134b JS |
1085 | } |
1086 | ||
01904572 LT |
1087 | /* Any left-over entries in the index? */ |
1088 | if (o->merge) { | |
da165f47 JH |
1089 | while (1) { |
1090 | struct cache_entry *ce = next_cache_entry(o); | |
1091 | if (!ce) | |
1092 | break; | |
01904572 | 1093 | if (unpack_index_entry(ce, o) < 0) |
da165f47 | 1094 | goto return_failed; |
17e46426 | 1095 | } |
17e46426 | 1096 | } |
da165f47 | 1097 | mark_all_ce_unused(o->src_index); |
16da134b | 1098 | |
08aefc9e NTND |
1099 | if (o->trivial_merges_only && o->nontrivial_merge) { |
1100 | ret = unpack_failed(o, "Merge requires file-level merging"); | |
1101 | goto done; | |
1102 | } | |
01904572 | 1103 | |
e800ec9d | 1104 | if (!o->skip_sparse_checkout) { |
9e1afb16 | 1105 | int empty_worktree = 1; |
2431afbf NTND |
1106 | |
1107 | /* | |
1108 | * Sparse checkout loop #2: set NEW_SKIP_WORKTREE on entries not in loop #1 | |
1109 | * If the will have NEW_SKIP_WORKTREE, also set CE_SKIP_WORKTREE | |
1110 | * so apply_sparse_checkout() won't attempt to remove it from worktree | |
1111 | */ | |
1112 | mark_new_skip_worktree(o->el, &o->result, CE_ADDED, CE_SKIP_WORKTREE | CE_NEW_SKIP_WORKTREE); | |
1113 | ||
17d26a4d | 1114 | ret = 0; |
2431afbf | 1115 | for (i = 0; i < o->result.cache_nr; i++) { |
e800ec9d NTND |
1116 | struct cache_entry *ce = o->result.cache[i]; |
1117 | ||
2431afbf NTND |
1118 | /* |
1119 | * Entries marked with CE_ADDED in merged_entry() do not have | |
1120 | * verify_absent() check (the check is effectively disabled | |
1121 | * because CE_NEW_SKIP_WORKTREE is set unconditionally). | |
1122 | * | |
1123 | * Do the real check now because we have had | |
1124 | * correct CE_NEW_SKIP_WORKTREE | |
1125 | */ | |
1126 | if (ce->ce_flags & CE_ADDED && | |
17d26a4d NTND |
1127 | verify_absent(ce, ERROR_WOULD_LOSE_UNTRACKED_OVERWRITTEN, o)) { |
1128 | if (!o->show_all_errors) | |
1129 | goto return_failed; | |
1130 | ret = -1; | |
1131 | } | |
2431afbf | 1132 | |
a5c446f1 | 1133 | if (apply_sparse_checkout(&o->result, ce, o)) { |
17d26a4d NTND |
1134 | if (!o->show_all_errors) |
1135 | goto return_failed; | |
e800ec9d | 1136 | ret = -1; |
e800ec9d | 1137 | } |
eec3fc03 | 1138 | if (!ce_skip_worktree(ce)) |
9e1afb16 | 1139 | empty_worktree = 0; |
f1f523ea | 1140 | |
e800ec9d | 1141 | } |
17d26a4d NTND |
1142 | if (ret < 0) |
1143 | goto return_failed; | |
a7bc906f NTND |
1144 | /* |
1145 | * Sparse checkout is meant to narrow down checkout area | |
1146 | * but it does not make sense to narrow down to empty working | |
1147 | * tree. This is usually a mistake in sparse checkout rules. | |
1148 | * Do not allow users to do that. | |
1149 | */ | |
9e1afb16 NTND |
1150 | if (o->result.cache_nr && empty_worktree) { |
1151 | ret = unpack_failed(o, "Sparse checkout leaves no entry on working directory"); | |
1152 | goto done; | |
1153 | } | |
e800ec9d | 1154 | } |
01904572 | 1155 | |
34110cd4 | 1156 | o->src_index = NULL; |
2e2b887d | 1157 | ret = check_updates(o) ? (-2) : 0; |
e28f7641 FC |
1158 | if (o->dst_index) { |
1159 | discard_index(o->dst_index); | |
34110cd4 | 1160 | *o->dst_index = o->result; |
a16cc8b2 JH |
1161 | } else { |
1162 | discard_index(&o->result); | |
e28f7641 | 1163 | } |
08aefc9e NTND |
1164 | |
1165 | done: | |
f6198812 | 1166 | clear_exclude_list(&el); |
2e2b887d | 1167 | return ret; |
da165f47 JH |
1168 | |
1169 | return_failed: | |
e6c111b4 MM |
1170 | if (o->show_all_errors) |
1171 | display_error_msgs(o); | |
da165f47 | 1172 | mark_all_ce_unused(o->src_index); |
026680f8 | 1173 | ret = unpack_failed(o, NULL); |
b4194828 JH |
1174 | if (o->exiting_early) |
1175 | ret = 0; | |
026680f8 | 1176 | goto done; |
16da134b | 1177 | } |
076b0adc JS |
1178 | |
1179 | /* Here come the merge functions */ | |
1180 | ||
eb9ae4b5 RS |
1181 | static int reject_merge(const struct cache_entry *ce, |
1182 | struct unpack_trees_options *o) | |
076b0adc | 1183 | { |
6a143aa2 JN |
1184 | return o->gently ? -1 : |
1185 | add_rejected_path(o, ERROR_WOULD_OVERWRITE, ce->name); | |
076b0adc JS |
1186 | } |
1187 | ||
eb9ae4b5 | 1188 | static int same(const struct cache_entry *a, const struct cache_entry *b) |
076b0adc JS |
1189 | { |
1190 | if (!!a != !!b) | |
1191 | return 0; | |
1192 | if (!a && !b) | |
1193 | return 1; | |
e11d7b59 JH |
1194 | if ((a->ce_flags | b->ce_flags) & CE_CONFLICTED) |
1195 | return 0; | |
076b0adc | 1196 | return a->ce_mode == b->ce_mode && |
a89fccd2 | 1197 | !hashcmp(a->sha1, b->sha1); |
076b0adc JS |
1198 | } |
1199 | ||
1200 | ||
1201 | /* | |
1202 | * When a CE gets turned into an unmerged entry, we | |
1203 | * want it to be up-to-date | |
1204 | */ | |
eb9ae4b5 RS |
1205 | static int verify_uptodate_1(const struct cache_entry *ce, |
1206 | struct unpack_trees_options *o, | |
1207 | enum unpack_trees_error_types error_type) | |
076b0adc JS |
1208 | { |
1209 | struct stat st; | |
1210 | ||
d5b66299 NTND |
1211 | if (o->index_only) |
1212 | return 0; | |
1213 | ||
1214 | /* | |
1215 | * CE_VALID and CE_SKIP_WORKTREE cheat, we better check again | |
1216 | * if this entry is truly up-to-date because this file may be | |
1217 | * overwritten. | |
1218 | */ | |
1219 | if ((ce->ce_flags & CE_VALID) || ce_skip_worktree(ce)) | |
1220 | ; /* keep checking */ | |
1221 | else if (o->reset || ce_uptodate(ce)) | |
203a2fe1 | 1222 | return 0; |
076b0adc JS |
1223 | |
1224 | if (!lstat(ce->name, &st)) { | |
d5b66299 NTND |
1225 | int flags = CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE; |
1226 | unsigned changed = ie_match_stat(o->src_index, ce, &st, flags); | |
076b0adc | 1227 | if (!changed) |
203a2fe1 | 1228 | return 0; |
936492d3 JH |
1229 | /* |
1230 | * NEEDSWORK: the current default policy is to allow | |
cb8ad289 | 1231 | * submodule to be out of sync wrt the superproject |
936492d3 JH |
1232 | * index. This needs to be tightened later for |
1233 | * submodules that are marked to be automatically | |
1234 | * checked out. | |
1235 | */ | |
7a51ed66 | 1236 | if (S_ISGITLINK(ce->ce_mode)) |
203a2fe1 | 1237 | return 0; |
076b0adc JS |
1238 | errno = 0; |
1239 | } | |
076b0adc | 1240 | if (errno == ENOENT) |
203a2fe1 | 1241 | return 0; |
17e46426 | 1242 | return o->gently ? -1 : |
e6c111b4 | 1243 | add_rejected_path(o, error_type, ce->name); |
35a5aa79 NTND |
1244 | } |
1245 | ||
eb9ae4b5 | 1246 | static int verify_uptodate(const struct cache_entry *ce, |
35a5aa79 NTND |
1247 | struct unpack_trees_options *o) |
1248 | { | |
2431afbf | 1249 | if (!o->skip_sparse_checkout && (ce->ce_flags & CE_NEW_SKIP_WORKTREE)) |
f1f523ea | 1250 | return 0; |
08402b04 | 1251 | return verify_uptodate_1(ce, o, ERROR_NOT_UPTODATE_FILE); |
076b0adc JS |
1252 | } |
1253 | ||
eb9ae4b5 | 1254 | static int verify_uptodate_sparse(const struct cache_entry *ce, |
e800ec9d NTND |
1255 | struct unpack_trees_options *o) |
1256 | { | |
08402b04 | 1257 | return verify_uptodate_1(ce, o, ERROR_SPARSE_NOT_UPTODATE_FILE); |
076b0adc JS |
1258 | } |
1259 | ||
eb9ae4b5 RS |
1260 | static void invalidate_ce_path(const struct cache_entry *ce, |
1261 | struct unpack_trees_options *o) | |
076b0adc | 1262 | { |
e931371a NTND |
1263 | if (!ce) |
1264 | return; | |
1265 | cache_tree_invalidate_path(o->src_index, ce->name); | |
1266 | untracked_cache_invalidate_path(o->src_index, ce->name); | |
076b0adc JS |
1267 | } |
1268 | ||
0cf73755 SV |
1269 | /* |
1270 | * Check that checking out ce->sha1 in subdir ce->name is not | |
1271 | * going to overwrite any working files. | |
1272 | * | |
1273 | * Currently, git does not checkout subprojects during a superproject | |
1274 | * checkout, so it is not going to overwrite anything. | |
1275 | */ | |
eb9ae4b5 RS |
1276 | static int verify_clean_submodule(const struct cache_entry *ce, |
1277 | enum unpack_trees_error_types error_type, | |
1278 | struct unpack_trees_options *o) | |
0cf73755 SV |
1279 | { |
1280 | return 0; | |
1281 | } | |
1282 | ||
eb9ae4b5 RS |
1283 | static int verify_clean_subdirectory(const struct cache_entry *ce, |
1284 | enum unpack_trees_error_types error_type, | |
1285 | struct unpack_trees_options *o) | |
c8193534 JH |
1286 | { |
1287 | /* | |
0cf73755 | 1288 | * we are about to extract "ce->name"; we would not want to lose |
c8193534 JH |
1289 | * anything in the existing directory there. |
1290 | */ | |
1291 | int namelen; | |
7b9e3ce0 | 1292 | int i; |
c8193534 JH |
1293 | struct dir_struct d; |
1294 | char *pathbuf; | |
1295 | int cnt = 0; | |
0cf73755 SV |
1296 | unsigned char sha1[20]; |
1297 | ||
7a51ed66 | 1298 | if (S_ISGITLINK(ce->ce_mode) && |
0cf73755 SV |
1299 | resolve_gitlink_ref(ce->name, "HEAD", sha1) == 0) { |
1300 | /* If we are not going to update the submodule, then | |
1301 | * we don't care. | |
1302 | */ | |
1303 | if (!hashcmp(sha1, ce->sha1)) | |
1304 | return 0; | |
08402b04 | 1305 | return verify_clean_submodule(ce, error_type, o); |
0cf73755 | 1306 | } |
c8193534 JH |
1307 | |
1308 | /* | |
1309 | * First let's make sure we do not have a local modification | |
1310 | * in that directory. | |
1311 | */ | |
68c4f6a5 | 1312 | namelen = ce_namelen(ce); |
da165f47 JH |
1313 | for (i = locate_in_src_index(ce, o); |
1314 | i < o->src_index->cache_nr; | |
1315 | i++) { | |
837e5fe9 CB |
1316 | struct cache_entry *ce2 = o->src_index->cache[i]; |
1317 | int len = ce_namelen(ce2); | |
c8193534 | 1318 | if (len < namelen || |
837e5fe9 CB |
1319 | strncmp(ce->name, ce2->name, namelen) || |
1320 | ce2->name[namelen] != '/') | |
c8193534 JH |
1321 | break; |
1322 | /* | |
da165f47 JH |
1323 | * ce2->name is an entry in the subdirectory to be |
1324 | * removed. | |
c8193534 | 1325 | */ |
837e5fe9 CB |
1326 | if (!ce_stage(ce2)) { |
1327 | if (verify_uptodate(ce2, o)) | |
203a2fe1 | 1328 | return -1; |
837e5fe9 | 1329 | add_entry(o, ce2, CE_REMOVE, 0); |
da165f47 | 1330 | mark_ce_used(ce2, o); |
c8193534 JH |
1331 | } |
1332 | cnt++; | |
1333 | } | |
1334 | ||
1335 | /* | |
1336 | * Then we need to make sure that we do not lose a locally | |
1337 | * present file that is not ignored. | |
1338 | */ | |
1339 | pathbuf = xmalloc(namelen + 2); | |
0cf73755 | 1340 | memcpy(pathbuf, ce->name, namelen); |
c8193534 JH |
1341 | strcpy(pathbuf+namelen, "/"); |
1342 | ||
1343 | memset(&d, 0, sizeof(d)); | |
1344 | if (o->dir) | |
1345 | d.exclude_per_dir = o->dir->exclude_per_dir; | |
dba2e203 | 1346 | i = read_directory(&d, pathbuf, namelen+1, NULL); |
c8193534 | 1347 | if (i) |
17e46426 | 1348 | return o->gently ? -1 : |
e6c111b4 | 1349 | add_rejected_path(o, ERROR_NOT_UPTODATE_DIR, ce->name); |
c8193534 JH |
1350 | free(pathbuf); |
1351 | return cnt; | |
1352 | } | |
1353 | ||
32260ad5 LT |
1354 | /* |
1355 | * This gets called when there was no index entry for the tree entry 'dst', | |
1356 | * but we found a file in the working tree that 'lstat()' said was fine, | |
1357 | * and we're on a case-insensitive filesystem. | |
1358 | * | |
1359 | * See if we can find a case-insensitive match in the index that also | |
1360 | * matches the stat information, and assume it's that other file! | |
1361 | */ | |
a9307f5a | 1362 | static int icase_exists(struct unpack_trees_options *o, const char *name, int len, struct stat *st) |
32260ad5 | 1363 | { |
9c5e6c80 | 1364 | const struct cache_entry *src; |
32260ad5 | 1365 | |
ebbd7439 | 1366 | src = index_file_exists(o->src_index, name, len, 1); |
56cac48c | 1367 | return src && !ie_match_stat(o->src_index, src, st, CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE); |
32260ad5 LT |
1368 | } |
1369 | ||
a9307f5a | 1370 | static int check_ok_to_remove(const char *name, int len, int dtype, |
eb9ae4b5 | 1371 | const struct cache_entry *ce, struct stat *st, |
a9307f5a CB |
1372 | enum unpack_trees_error_types error_type, |
1373 | struct unpack_trees_options *o) | |
1374 | { | |
9c5e6c80 | 1375 | const struct cache_entry *result; |
a9307f5a CB |
1376 | |
1377 | /* | |
1378 | * It may be that the 'lstat()' succeeded even though | |
1379 | * target 'ce' was absent, because there is an old | |
1380 | * entry that is different only in case.. | |
1381 | * | |
1382 | * Ignore that lstat() if it matches. | |
1383 | */ | |
1384 | if (ignore_case && icase_exists(o, name, len, st)) | |
1385 | return 0; | |
1386 | ||
589570db | 1387 | if (o->dir && |
b07bc8c8 | 1388 | is_excluded(o->dir, name, &dtype)) |
a9307f5a CB |
1389 | /* |
1390 | * ce->name is explicitly excluded, so it is Ok to | |
1391 | * overwrite it. | |
1392 | */ | |
1393 | return 0; | |
1394 | if (S_ISDIR(st->st_mode)) { | |
1395 | /* | |
1396 | * We are checking out path "foo" and | |
1397 | * found "foo/." in the working tree. | |
1398 | * This is tricky -- if we have modified | |
1399 | * files that are in "foo/" we would lose | |
1400 | * them. | |
1401 | */ | |
1402 | if (verify_clean_subdirectory(ce, error_type, o) < 0) | |
1403 | return -1; | |
1404 | return 0; | |
1405 | } | |
1406 | ||
1407 | /* | |
1408 | * The previous round may already have decided to | |
1409 | * delete this path, which is in a subdirectory that | |
1410 | * is being replaced with a blob. | |
1411 | */ | |
ebbd7439 | 1412 | result = index_file_exists(&o->result, name, len, 0); |
a9307f5a CB |
1413 | if (result) { |
1414 | if (result->ce_flags & CE_REMOVE) | |
1415 | return 0; | |
1416 | } | |
1417 | ||
1418 | return o->gently ? -1 : | |
1419 | add_rejected_path(o, error_type, name); | |
1420 | } | |
1421 | ||
076b0adc JS |
1422 | /* |
1423 | * We do not want to remove or overwrite a working tree file that | |
f8a9d428 | 1424 | * is not tracked, unless it is ignored. |
076b0adc | 1425 | */ |
eb9ae4b5 RS |
1426 | static int verify_absent_1(const struct cache_entry *ce, |
1427 | enum unpack_trees_error_types error_type, | |
1428 | struct unpack_trees_options *o) | |
076b0adc | 1429 | { |
f66caaf9 | 1430 | int len; |
076b0adc JS |
1431 | struct stat st; |
1432 | ||
1433 | if (o->index_only || o->reset || !o->update) | |
203a2fe1 | 1434 | return 0; |
c8193534 | 1435 | |
f66caaf9 CB |
1436 | len = check_leading_path(ce->name, ce_namelen(ce)); |
1437 | if (!len) | |
203a2fe1 | 1438 | return 0; |
f66caaf9 CB |
1439 | else if (len > 0) { |
1440 | char path[PATH_MAX + 1]; | |
1441 | memcpy(path, ce->name, len); | |
1442 | path[len] = 0; | |
a93e5301 JN |
1443 | if (lstat(path, &st)) |
1444 | return error("cannot stat '%s': %s", path, | |
1445 | strerror(errno)); | |
ec0603e1 | 1446 | |
f66caaf9 CB |
1447 | return check_ok_to_remove(path, len, DT_UNKNOWN, NULL, &st, |
1448 | error_type, o); | |
92fda79e JN |
1449 | } else if (lstat(ce->name, &st)) { |
1450 | if (errno != ENOENT) | |
1451 | return error("cannot stat '%s': %s", ce->name, | |
1452 | strerror(errno)); | |
1453 | return 0; | |
1454 | } else { | |
a9307f5a | 1455 | return check_ok_to_remove(ce->name, ce_namelen(ce), |
92fda79e JN |
1456 | ce_to_dtype(ce), ce, &st, |
1457 | error_type, o); | |
1458 | } | |
076b0adc | 1459 | } |
a9307f5a | 1460 | |
eb9ae4b5 | 1461 | static int verify_absent(const struct cache_entry *ce, |
08402b04 | 1462 | enum unpack_trees_error_types error_type, |
35a5aa79 NTND |
1463 | struct unpack_trees_options *o) |
1464 | { | |
2431afbf | 1465 | if (!o->skip_sparse_checkout && (ce->ce_flags & CE_NEW_SKIP_WORKTREE)) |
f1f523ea | 1466 | return 0; |
08402b04 | 1467 | return verify_absent_1(ce, error_type, o); |
35a5aa79 | 1468 | } |
076b0adc | 1469 | |
eb9ae4b5 RS |
1470 | static int verify_absent_sparse(const struct cache_entry *ce, |
1471 | enum unpack_trees_error_types error_type, | |
1472 | struct unpack_trees_options *o) | |
e800ec9d | 1473 | { |
08402b04 MM |
1474 | enum unpack_trees_error_types orphaned_error = error_type; |
1475 | if (orphaned_error == ERROR_WOULD_LOSE_UNTRACKED_OVERWRITTEN) | |
1476 | orphaned_error = ERROR_WOULD_LOSE_ORPHANED_OVERWRITTEN; | |
1477 | ||
1478 | return verify_absent_1(ce, orphaned_error, o); | |
e800ec9d | 1479 | } |
076b0adc | 1480 | |
f2fa3542 | 1481 | static int merged_entry(const struct cache_entry *ce, |
eb9ae4b5 | 1482 | const struct cache_entry *old, |
f2fa3542 | 1483 | struct unpack_trees_options *o) |
076b0adc | 1484 | { |
7f8ab8dc | 1485 | int update = CE_UPDATE; |
f2fa3542 | 1486 | struct cache_entry *merge = dup_entry(ce); |
7f8ab8dc | 1487 | |
e11d7b59 | 1488 | if (!old) { |
2431afbf NTND |
1489 | /* |
1490 | * New index entries. In sparse checkout, the following | |
1491 | * verify_absent() will be delayed until after | |
1492 | * traverse_trees() finishes in unpack_trees(), then: | |
1493 | * | |
1494 | * - CE_NEW_SKIP_WORKTREE will be computed correctly | |
1495 | * - verify_absent() be called again, this time with | |
1496 | * correct CE_NEW_SKIP_WORKTREE | |
1497 | * | |
1498 | * verify_absent() call here does nothing in sparse | |
1499 | * checkout (i.e. o->skip_sparse_checkout == 0) | |
1500 | */ | |
1501 | update |= CE_ADDED; | |
1502 | merge->ce_flags |= CE_NEW_SKIP_WORKTREE; | |
1503 | ||
f2fa3542 RS |
1504 | if (verify_absent(merge, |
1505 | ERROR_WOULD_LOSE_UNTRACKED_OVERWRITTEN, o)) { | |
1506 | free(merge); | |
e11d7b59 | 1507 | return -1; |
f2fa3542 | 1508 | } |
e11d7b59 JH |
1509 | invalidate_ce_path(merge, o); |
1510 | } else if (!(old->ce_flags & CE_CONFLICTED)) { | |
076b0adc JS |
1511 | /* |
1512 | * See if we can re-use the old CE directly? | |
1513 | * That way we get the uptodate stat info. | |
1514 | * | |
7f8ab8dc LT |
1515 | * This also removes the UPDATE flag on a match; otherwise |
1516 | * we will end up overwriting local changes in the work tree. | |
076b0adc JS |
1517 | */ |
1518 | if (same(old, merge)) { | |
eb7a2f1d | 1519 | copy_cache_entry(merge, old); |
7f8ab8dc | 1520 | update = 0; |
076b0adc | 1521 | } else { |
f2fa3542 RS |
1522 | if (verify_uptodate(old, o)) { |
1523 | free(merge); | |
203a2fe1 | 1524 | return -1; |
f2fa3542 | 1525 | } |
2431afbf NTND |
1526 | /* Migrate old flags over */ |
1527 | update |= old->ce_flags & (CE_SKIP_WORKTREE | CE_NEW_SKIP_WORKTREE); | |
bc052d7f | 1528 | invalidate_ce_path(old, o); |
076b0adc | 1529 | } |
e11d7b59 JH |
1530 | } else { |
1531 | /* | |
1532 | * Previously unmerged entry left as an existence | |
1533 | * marker by read_index_unmerged(); | |
1534 | */ | |
1535 | invalidate_ce_path(old, o); | |
076b0adc JS |
1536 | } |
1537 | ||
f2fa3542 | 1538 | do_add_entry(o, merge, update, CE_STAGEMASK); |
076b0adc JS |
1539 | return 1; |
1540 | } | |
1541 | ||
eb9ae4b5 RS |
1542 | static int deleted_entry(const struct cache_entry *ce, |
1543 | const struct cache_entry *old, | |
1544 | struct unpack_trees_options *o) | |
076b0adc | 1545 | { |
34110cd4 LT |
1546 | /* Did it exist in the index? */ |
1547 | if (!old) { | |
08402b04 | 1548 | if (verify_absent(ce, ERROR_WOULD_LOSE_UNTRACKED_REMOVED, o)) |
203a2fe1 | 1549 | return -1; |
34110cd4 LT |
1550 | return 0; |
1551 | } | |
e11d7b59 | 1552 | if (!(old->ce_flags & CE_CONFLICTED) && verify_uptodate(old, o)) |
34110cd4 LT |
1553 | return -1; |
1554 | add_entry(o, ce, CE_REMOVE, 0); | |
bc052d7f | 1555 | invalidate_ce_path(ce, o); |
076b0adc JS |
1556 | return 1; |
1557 | } | |
1558 | ||
eb9ae4b5 RS |
1559 | static int keep_entry(const struct cache_entry *ce, |
1560 | struct unpack_trees_options *o) | |
076b0adc | 1561 | { |
34110cd4 | 1562 | add_entry(o, ce, 0, 0); |
076b0adc JS |
1563 | return 1; |
1564 | } | |
1565 | ||
1566 | #if DBRT_DEBUG | |
1567 | static void show_stage_entry(FILE *o, | |
1568 | const char *label, const struct cache_entry *ce) | |
1569 | { | |
1570 | if (!ce) | |
1571 | fprintf(o, "%s (missing)\n", label); | |
1572 | else | |
1573 | fprintf(o, "%s%06o %s %d\t%s\n", | |
1574 | label, | |
7a51ed66 | 1575 | ce->ce_mode, |
076b0adc JS |
1576 | sha1_to_hex(ce->sha1), |
1577 | ce_stage(ce), | |
1578 | ce->name); | |
1579 | } | |
1580 | #endif | |
1581 | ||
5828e835 RS |
1582 | int threeway_merge(const struct cache_entry * const *stages, |
1583 | struct unpack_trees_options *o) | |
076b0adc | 1584 | { |
eb9ae4b5 RS |
1585 | const struct cache_entry *index; |
1586 | const struct cache_entry *head; | |
1587 | const struct cache_entry *remote = stages[o->head_idx + 1]; | |
076b0adc JS |
1588 | int count; |
1589 | int head_match = 0; | |
1590 | int remote_match = 0; | |
076b0adc JS |
1591 | |
1592 | int df_conflict_head = 0; | |
1593 | int df_conflict_remote = 0; | |
1594 | ||
1595 | int any_anc_missing = 0; | |
1596 | int no_anc_exists = 1; | |
1597 | int i; | |
1598 | ||
1599 | for (i = 1; i < o->head_idx; i++) { | |
4c4caafc | 1600 | if (!stages[i] || stages[i] == o->df_conflict_entry) |
076b0adc | 1601 | any_anc_missing = 1; |
4c4caafc | 1602 | else |
076b0adc | 1603 | no_anc_exists = 0; |
076b0adc JS |
1604 | } |
1605 | ||
1606 | index = stages[0]; | |
1607 | head = stages[o->head_idx]; | |
1608 | ||
1609 | if (head == o->df_conflict_entry) { | |
1610 | df_conflict_head = 1; | |
1611 | head = NULL; | |
1612 | } | |
1613 | ||
1614 | if (remote == o->df_conflict_entry) { | |
1615 | df_conflict_remote = 1; | |
1616 | remote = NULL; | |
1617 | } | |
1618 | ||
cee2d6ae JH |
1619 | /* |
1620 | * First, if there's a #16 situation, note that to prevent #13 | |
076b0adc JS |
1621 | * and #14. |
1622 | */ | |
1623 | if (!same(remote, head)) { | |
1624 | for (i = 1; i < o->head_idx; i++) { | |
1625 | if (same(stages[i], head)) { | |
1626 | head_match = i; | |
1627 | } | |
1628 | if (same(stages[i], remote)) { | |
1629 | remote_match = i; | |
1630 | } | |
1631 | } | |
1632 | } | |
1633 | ||
cee2d6ae JH |
1634 | /* |
1635 | * We start with cases where the index is allowed to match | |
076b0adc JS |
1636 | * something other than the head: #14(ALT) and #2ALT, where it |
1637 | * is permitted to match the result instead. | |
1638 | */ | |
1639 | /* #14, #14ALT, #2ALT */ | |
1640 | if (remote && !df_conflict_head && head_match && !remote_match) { | |
1641 | if (index && !same(index, remote) && !same(index, head)) | |
6a143aa2 | 1642 | return reject_merge(index, o); |
076b0adc JS |
1643 | return merged_entry(remote, index, o); |
1644 | } | |
1645 | /* | |
1646 | * If we have an entry in the index cache, then we want to | |
1647 | * make sure that it matches head. | |
1648 | */ | |
4e7c4571 | 1649 | if (index && !same(index, head)) |
6a143aa2 | 1650 | return reject_merge(index, o); |
076b0adc JS |
1651 | |
1652 | if (head) { | |
1653 | /* #5ALT, #15 */ | |
1654 | if (same(head, remote)) | |
1655 | return merged_entry(head, index, o); | |
1656 | /* #13, #3ALT */ | |
1657 | if (!df_conflict_remote && remote_match && !head_match) | |
1658 | return merged_entry(head, index, o); | |
1659 | } | |
1660 | ||
1661 | /* #1 */ | |
34110cd4 | 1662 | if (!head && !remote && any_anc_missing) |
076b0adc JS |
1663 | return 0; |
1664 | ||
cee2d6ae JH |
1665 | /* |
1666 | * Under the "aggressive" rule, we resolve mostly trivial | |
076b0adc JS |
1667 | * cases that we historically had git-merge-one-file resolve. |
1668 | */ | |
1669 | if (o->aggressive) { | |
cee2d6ae JH |
1670 | int head_deleted = !head; |
1671 | int remote_deleted = !remote; | |
eb9ae4b5 | 1672 | const struct cache_entry *ce = NULL; |
4c4caafc JH |
1673 | |
1674 | if (index) | |
0cf73755 | 1675 | ce = index; |
4c4caafc | 1676 | else if (head) |
0cf73755 | 1677 | ce = head; |
4c4caafc | 1678 | else if (remote) |
0cf73755 | 1679 | ce = remote; |
4c4caafc JH |
1680 | else { |
1681 | for (i = 1; i < o->head_idx; i++) { | |
1682 | if (stages[i] && stages[i] != o->df_conflict_entry) { | |
0cf73755 | 1683 | ce = stages[i]; |
4c4caafc JH |
1684 | break; |
1685 | } | |
1686 | } | |
1687 | } | |
1688 | ||
076b0adc JS |
1689 | /* |
1690 | * Deleted in both. | |
1691 | * Deleted in one and unchanged in the other. | |
1692 | */ | |
1693 | if ((head_deleted && remote_deleted) || | |
1694 | (head_deleted && remote && remote_match) || | |
1695 | (remote_deleted && head && head_match)) { | |
1696 | if (index) | |
1697 | return deleted_entry(index, index, o); | |
34110cd4 | 1698 | if (ce && !head_deleted) { |
08402b04 | 1699 | if (verify_absent(ce, ERROR_WOULD_LOSE_UNTRACKED_REMOVED, o)) |
203a2fe1 DB |
1700 | return -1; |
1701 | } | |
076b0adc JS |
1702 | return 0; |
1703 | } | |
1704 | /* | |
1705 | * Added in both, identically. | |
1706 | */ | |
1707 | if (no_anc_exists && head && remote && same(head, remote)) | |
1708 | return merged_entry(head, index, o); | |
1709 | ||
1710 | } | |
1711 | ||
1712 | /* Below are "no merge" cases, which require that the index be | |
1713 | * up-to-date to avoid the files getting overwritten with | |
1714 | * conflict resolution files. | |
1715 | */ | |
1716 | if (index) { | |
203a2fe1 DB |
1717 | if (verify_uptodate(index, o)) |
1718 | return -1; | |
076b0adc | 1719 | } |
076b0adc JS |
1720 | |
1721 | o->nontrivial_merge = 1; | |
1722 | ||
ea4b52a8 | 1723 | /* #2, #3, #4, #6, #7, #9, #10, #11. */ |
076b0adc JS |
1724 | count = 0; |
1725 | if (!head_match || !remote_match) { | |
1726 | for (i = 1; i < o->head_idx; i++) { | |
4c4caafc | 1727 | if (stages[i] && stages[i] != o->df_conflict_entry) { |
7f7932ab | 1728 | keep_entry(stages[i], o); |
076b0adc JS |
1729 | count++; |
1730 | break; | |
1731 | } | |
1732 | } | |
1733 | } | |
1734 | #if DBRT_DEBUG | |
1735 | else { | |
1736 | fprintf(stderr, "read-tree: warning #16 detected\n"); | |
1737 | show_stage_entry(stderr, "head ", stages[head_match]); | |
1738 | show_stage_entry(stderr, "remote ", stages[remote_match]); | |
1739 | } | |
1740 | #endif | |
7f7932ab JH |
1741 | if (head) { count += keep_entry(head, o); } |
1742 | if (remote) { count += keep_entry(remote, o); } | |
076b0adc JS |
1743 | return count; |
1744 | } | |
1745 | ||
1746 | /* | |
1747 | * Two-way merge. | |
1748 | * | |
1749 | * The rule is to "carry forward" what is in the index without losing | |
a75d7b54 | 1750 | * information across a "fast-forward", favoring a successful merge |
076b0adc JS |
1751 | * over a merge failure when it makes sense. For details of the |
1752 | * "carry forward" rule, please see <Documentation/git-read-tree.txt>. | |
1753 | * | |
1754 | */ | |
5828e835 RS |
1755 | int twoway_merge(const struct cache_entry * const *src, |
1756 | struct unpack_trees_options *o) | |
076b0adc | 1757 | { |
eb9ae4b5 RS |
1758 | const struct cache_entry *current = src[0]; |
1759 | const struct cache_entry *oldtree = src[1]; | |
1760 | const struct cache_entry *newtree = src[2]; | |
076b0adc JS |
1761 | |
1762 | if (o->merge_size != 2) | |
1763 | return error("Cannot do a twoway merge of %d trees", | |
1764 | o->merge_size); | |
1765 | ||
b8ba1535 JH |
1766 | if (oldtree == o->df_conflict_entry) |
1767 | oldtree = NULL; | |
1768 | if (newtree == o->df_conflict_entry) | |
1769 | newtree = NULL; | |
1770 | ||
076b0adc | 1771 | if (current) { |
b018ff60 JK |
1772 | if (current->ce_flags & CE_CONFLICTED) { |
1773 | if (same(oldtree, newtree) || o->reset) { | |
1774 | if (!newtree) | |
1775 | return deleted_entry(current, current, o); | |
1776 | else | |
1777 | return merged_entry(newtree, current, o); | |
1778 | } | |
6a143aa2 | 1779 | return reject_merge(current, o); |
6c1db1b3 | 1780 | } else if ((!oldtree && !newtree) || /* 4 and 5 */ |
b018ff60 JK |
1781 | (!oldtree && newtree && |
1782 | same(current, newtree)) || /* 6 and 7 */ | |
1783 | (oldtree && newtree && | |
1784 | same(oldtree, newtree)) || /* 14 and 15 */ | |
1785 | (oldtree && newtree && | |
1786 | !same(oldtree, newtree) && /* 18 and 19 */ | |
1787 | same(current, newtree))) { | |
7f7932ab | 1788 | return keep_entry(current, o); |
6c1db1b3 | 1789 | } else if (oldtree && !newtree && same(current, oldtree)) { |
076b0adc JS |
1790 | /* 10 or 11 */ |
1791 | return deleted_entry(oldtree, current, o); | |
6c1db1b3 | 1792 | } else if (oldtree && newtree && |
076b0adc JS |
1793 | same(current, oldtree) && !same(current, newtree)) { |
1794 | /* 20 or 21 */ | |
1795 | return merged_entry(newtree, current, o); | |
6c1db1b3 | 1796 | } else |
6a143aa2 | 1797 | return reject_merge(current, o); |
076b0adc | 1798 | } |
55218834 JH |
1799 | else if (newtree) { |
1800 | if (oldtree && !o->initial_checkout) { | |
1801 | /* | |
1802 | * deletion of the path was staged; | |
1803 | */ | |
1804 | if (same(oldtree, newtree)) | |
1805 | return 1; | |
1806 | return reject_merge(oldtree, o); | |
1807 | } | |
076b0adc | 1808 | return merged_entry(newtree, current, o); |
55218834 | 1809 | } |
d699676d | 1810 | return deleted_entry(oldtree, current, o); |
076b0adc JS |
1811 | } |
1812 | ||
1813 | /* | |
1814 | * Bind merge. | |
1815 | * | |
1816 | * Keep the index entries at stage0, collapse stage1 but make sure | |
1817 | * stage0 does not have anything there. | |
1818 | */ | |
5828e835 RS |
1819 | int bind_merge(const struct cache_entry * const *src, |
1820 | struct unpack_trees_options *o) | |
076b0adc | 1821 | { |
eb9ae4b5 RS |
1822 | const struct cache_entry *old = src[0]; |
1823 | const struct cache_entry *a = src[1]; | |
076b0adc JS |
1824 | |
1825 | if (o->merge_size != 1) | |
82247e9b | 1826 | return error("Cannot do a bind merge of %d trees", |
076b0adc JS |
1827 | o->merge_size); |
1828 | if (a && old) | |
17e46426 | 1829 | return o->gently ? -1 : |
08353ebb | 1830 | error(ERRORMSG(o, ERROR_BIND_OVERLAP), a->name, old->name); |
076b0adc | 1831 | if (!a) |
7f7932ab | 1832 | return keep_entry(old, o); |
076b0adc JS |
1833 | else |
1834 | return merged_entry(a, NULL, o); | |
1835 | } | |
1836 | ||
1837 | /* | |
1838 | * One-way merge. | |
1839 | * | |
1840 | * The rule is: | |
1841 | * - take the stat information from stage0, take the data from stage1 | |
1842 | */ | |
5828e835 RS |
1843 | int oneway_merge(const struct cache_entry * const *src, |
1844 | struct unpack_trees_options *o) | |
076b0adc | 1845 | { |
eb9ae4b5 RS |
1846 | const struct cache_entry *old = src[0]; |
1847 | const struct cache_entry *a = src[1]; | |
076b0adc JS |
1848 | |
1849 | if (o->merge_size != 1) | |
1850 | return error("Cannot do a oneway merge of %d trees", | |
1851 | o->merge_size); | |
1852 | ||
78d3b06e | 1853 | if (!a || a == o->df_conflict_entry) |
076b0adc | 1854 | return deleted_entry(old, old, o); |
34110cd4 | 1855 | |
076b0adc | 1856 | if (old && same(old, a)) { |
34110cd4 | 1857 | int update = 0; |
686b2de0 | 1858 | if (o->reset && o->update && !ce_uptodate(old) && !ce_skip_worktree(old)) { |
076b0adc JS |
1859 | struct stat st; |
1860 | if (lstat(old->name, &st) || | |
56cac48c | 1861 | ie_match_stat(o->src_index, old, &st, CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE)) |
34110cd4 | 1862 | update |= CE_UPDATE; |
076b0adc | 1863 | } |
34110cd4 LT |
1864 | add_entry(o, old, update, 0); |
1865 | return 0; | |
076b0adc JS |
1866 | } |
1867 | return merged_entry(a, old, o); | |
1868 | } |