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[thirdparty/git.git] / list-objects.c
1 #include "cache.h"
2 #include "tag.h"
3 #include "commit.h"
4 #include "tree.h"
5 #include "blob.h"
6 #include "diff.h"
7 #include "tree-walk.h"
8 #include "revision.h"
9 #include "list-objects.h"
10 #include "list-objects-filter.h"
11 #include "list-objects-filter-options.h"
12 #include "packfile.h"
13 #include "object-store.h"
14 #include "trace.h"
15
16 struct traversal_context {
17 struct rev_info *revs;
18 show_object_fn show_object;
19 show_commit_fn show_commit;
20 void *show_data;
21 struct filter *filter;
22 };
23
24 static void process_blob(struct traversal_context *ctx,
25 struct blob *blob,
26 struct strbuf *path,
27 const char *name)
28 {
29 struct object *obj = &blob->object;
30 size_t pathlen;
31 enum list_objects_filter_result r;
32
33 if (!ctx->revs->blob_objects)
34 return;
35 if (!obj)
36 die("bad blob object");
37 if (obj->flags & (UNINTERESTING | SEEN))
38 return;
39
40 /*
41 * Pre-filter known-missing objects when explicitly requested.
42 * Otherwise, a missing object error message may be reported
43 * later (depending on other filtering criteria).
44 *
45 * Note that this "--exclude-promisor-objects" pre-filtering
46 * may cause the actual filter to report an incomplete list
47 * of missing objects.
48 */
49 if (ctx->revs->exclude_promisor_objects &&
50 !has_object_file(&obj->oid) &&
51 is_promisor_object(&obj->oid))
52 return;
53
54 pathlen = path->len;
55 strbuf_addstr(path, name);
56 r = list_objects_filter__filter_object(ctx->revs->repo,
57 LOFS_BLOB, obj,
58 path->buf, &path->buf[pathlen],
59 ctx->filter);
60 if (r & LOFR_MARK_SEEN)
61 obj->flags |= SEEN;
62 if (r & LOFR_DO_SHOW)
63 ctx->show_object(obj, path->buf, ctx->show_data);
64 strbuf_setlen(path, pathlen);
65 }
66
67 /*
68 * Processing a gitlink entry currently does nothing, since
69 * we do not recurse into the subproject.
70 *
71 * We *could* eventually add a flag that actually does that,
72 * which would involve:
73 * - is the subproject actually checked out?
74 * - if so, see if the subproject has already been added
75 * to the alternates list, and add it if not.
76 * - process the commit (or tag) the gitlink points to
77 * recursively.
78 *
79 * However, it's unclear whether there is really ever any
80 * reason to see superprojects and subprojects as such a
81 * "unified" object pool (potentially resulting in a totally
82 * humongous pack - avoiding which was the whole point of
83 * having gitlinks in the first place!).
84 *
85 * So for now, there is just a note that we *could* follow
86 * the link, and how to do it. Whether it necessarily makes
87 * any sense what-so-ever to ever do that is another issue.
88 */
89 static void process_gitlink(struct traversal_context *ctx,
90 const unsigned char *sha1,
91 struct strbuf *path,
92 const char *name)
93 {
94 /* Nothing to do */
95 }
96
97 static void process_tree(struct traversal_context *ctx,
98 struct tree *tree,
99 struct strbuf *base,
100 const char *name);
101
102 static void process_tree_contents(struct traversal_context *ctx,
103 struct tree *tree,
104 struct strbuf *base)
105 {
106 struct tree_desc desc;
107 struct name_entry entry;
108 enum interesting match = ctx->revs->diffopt.pathspec.nr == 0 ?
109 all_entries_interesting : entry_not_interesting;
110
111 init_tree_desc(&desc, tree->buffer, tree->size);
112
113 while (tree_entry(&desc, &entry)) {
114 if (match != all_entries_interesting) {
115 match = tree_entry_interesting(ctx->revs->repo->index,
116 &entry, base, 0,
117 &ctx->revs->diffopt.pathspec);
118 if (match == all_entries_not_interesting)
119 break;
120 if (match == entry_not_interesting)
121 continue;
122 }
123
124 if (S_ISDIR(entry.mode)) {
125 struct tree *t = lookup_tree(ctx->revs->repo, &entry.oid);
126 if (!t) {
127 die(_("entry '%s' in tree %s has tree mode, "
128 "but is not a tree"),
129 entry.path, oid_to_hex(&tree->object.oid));
130 }
131 t->object.flags |= NOT_USER_GIVEN;
132 process_tree(ctx, t, base, entry.path);
133 }
134 else if (S_ISGITLINK(entry.mode))
135 process_gitlink(ctx, entry.oid.hash,
136 base, entry.path);
137 else {
138 struct blob *b = lookup_blob(ctx->revs->repo, &entry.oid);
139 if (!b) {
140 die(_("entry '%s' in tree %s has blob mode, "
141 "but is not a blob"),
142 entry.path, oid_to_hex(&tree->object.oid));
143 }
144 b->object.flags |= NOT_USER_GIVEN;
145 process_blob(ctx, b, base, entry.path);
146 }
147 }
148 }
149
150 static void process_tree(struct traversal_context *ctx,
151 struct tree *tree,
152 struct strbuf *base,
153 const char *name)
154 {
155 struct object *obj = &tree->object;
156 struct rev_info *revs = ctx->revs;
157 int baselen = base->len;
158 enum list_objects_filter_result r;
159 int failed_parse;
160
161 if (!revs->tree_objects)
162 return;
163 if (!obj)
164 die("bad tree object");
165 if (obj->flags & (UNINTERESTING | SEEN))
166 return;
167 if (revs->include_check_obj &&
168 !revs->include_check_obj(&tree->object, revs->include_check_data))
169 return;
170
171 failed_parse = parse_tree_gently(tree, 1);
172 if (failed_parse) {
173 if (revs->ignore_missing_links)
174 return;
175
176 /*
177 * Pre-filter known-missing tree objects when explicitly
178 * requested. This may cause the actual filter to report
179 * an incomplete list of missing objects.
180 */
181 if (revs->exclude_promisor_objects &&
182 is_promisor_object(&obj->oid))
183 return;
184
185 if (!revs->do_not_die_on_missing_tree)
186 die("bad tree object %s", oid_to_hex(&obj->oid));
187 }
188
189 strbuf_addstr(base, name);
190 r = list_objects_filter__filter_object(ctx->revs->repo,
191 LOFS_BEGIN_TREE, obj,
192 base->buf, &base->buf[baselen],
193 ctx->filter);
194 if (r & LOFR_MARK_SEEN)
195 obj->flags |= SEEN;
196 if (r & LOFR_DO_SHOW)
197 ctx->show_object(obj, base->buf, ctx->show_data);
198 if (base->len)
199 strbuf_addch(base, '/');
200
201 if (r & LOFR_SKIP_TREE)
202 trace_printf("Skipping contents of tree %s...\n", base->buf);
203 else if (!failed_parse)
204 process_tree_contents(ctx, tree, base);
205
206 r = list_objects_filter__filter_object(ctx->revs->repo,
207 LOFS_END_TREE, obj,
208 base->buf, &base->buf[baselen],
209 ctx->filter);
210 if (r & LOFR_MARK_SEEN)
211 obj->flags |= SEEN;
212 if (r & LOFR_DO_SHOW)
213 ctx->show_object(obj, base->buf, ctx->show_data);
214
215 strbuf_setlen(base, baselen);
216 free_tree_buffer(tree);
217 }
218
219 static void process_tag(struct traversal_context *ctx,
220 struct tag *tag,
221 const char *name)
222 {
223 enum list_objects_filter_result r;
224
225 r = list_objects_filter__filter_object(ctx->revs->repo, LOFS_TAG,
226 &tag->object, NULL, NULL,
227 ctx->filter);
228 if (r & LOFR_MARK_SEEN)
229 tag->object.flags |= SEEN;
230 if (r & LOFR_DO_SHOW)
231 ctx->show_object(&tag->object, name, ctx->show_data);
232 }
233
234 static void mark_edge_parents_uninteresting(struct commit *commit,
235 struct rev_info *revs,
236 show_edge_fn show_edge)
237 {
238 struct commit_list *parents;
239
240 for (parents = commit->parents; parents; parents = parents->next) {
241 struct commit *parent = parents->item;
242 if (!(parent->object.flags & UNINTERESTING))
243 continue;
244 mark_tree_uninteresting(revs->repo, get_commit_tree(parent));
245 if (revs->edge_hint && !(parent->object.flags & SHOWN)) {
246 parent->object.flags |= SHOWN;
247 show_edge(parent);
248 }
249 }
250 }
251
252 static void add_edge_parents(struct commit *commit,
253 struct rev_info *revs,
254 show_edge_fn show_edge,
255 struct oidset *set)
256 {
257 struct commit_list *parents;
258
259 for (parents = commit->parents; parents; parents = parents->next) {
260 struct commit *parent = parents->item;
261 struct tree *tree = get_commit_tree(parent);
262
263 if (!tree)
264 continue;
265
266 oidset_insert(set, &tree->object.oid);
267
268 if (!(parent->object.flags & UNINTERESTING))
269 continue;
270 tree->object.flags |= UNINTERESTING;
271
272 if (revs->edge_hint && !(parent->object.flags & SHOWN)) {
273 parent->object.flags |= SHOWN;
274 show_edge(parent);
275 }
276 }
277 }
278
279 void mark_edges_uninteresting(struct rev_info *revs,
280 show_edge_fn show_edge,
281 int sparse)
282 {
283 struct commit_list *list;
284 int i;
285
286 if (sparse) {
287 struct oidset set;
288 oidset_init(&set, 16);
289
290 for (list = revs->commits; list; list = list->next) {
291 struct commit *commit = list->item;
292 struct tree *tree = get_commit_tree(commit);
293
294 if (commit->object.flags & UNINTERESTING)
295 tree->object.flags |= UNINTERESTING;
296
297 oidset_insert(&set, &tree->object.oid);
298 add_edge_parents(commit, revs, show_edge, &set);
299 }
300
301 mark_trees_uninteresting_sparse(revs->repo, &set);
302 oidset_clear(&set);
303 } else {
304 for (list = revs->commits; list; list = list->next) {
305 struct commit *commit = list->item;
306 if (commit->object.flags & UNINTERESTING) {
307 mark_tree_uninteresting(revs->repo,
308 get_commit_tree(commit));
309 if (revs->edge_hint_aggressive && !(commit->object.flags & SHOWN)) {
310 commit->object.flags |= SHOWN;
311 show_edge(commit);
312 }
313 continue;
314 }
315 mark_edge_parents_uninteresting(commit, revs, show_edge);
316 }
317 }
318
319 if (revs->edge_hint_aggressive) {
320 for (i = 0; i < revs->cmdline.nr; i++) {
321 struct object *obj = revs->cmdline.rev[i].item;
322 struct commit *commit = (struct commit *)obj;
323 if (obj->type != OBJ_COMMIT || !(obj->flags & UNINTERESTING))
324 continue;
325 mark_tree_uninteresting(revs->repo,
326 get_commit_tree(commit));
327 if (!(obj->flags & SHOWN)) {
328 obj->flags |= SHOWN;
329 show_edge(commit);
330 }
331 }
332 }
333 }
334
335 static void add_pending_tree(struct rev_info *revs, struct tree *tree)
336 {
337 add_pending_object(revs, &tree->object, "");
338 }
339
340 static void traverse_trees_and_blobs(struct traversal_context *ctx,
341 struct strbuf *base)
342 {
343 int i;
344
345 assert(base->len == 0);
346
347 for (i = 0; i < ctx->revs->pending.nr; i++) {
348 struct object_array_entry *pending = ctx->revs->pending.objects + i;
349 struct object *obj = pending->item;
350 const char *name = pending->name;
351 const char *path = pending->path;
352 if (obj->flags & (UNINTERESTING | SEEN))
353 continue;
354 if (obj->type == OBJ_TAG) {
355 process_tag(ctx, (struct tag *)obj, name);
356 continue;
357 }
358 if (!path)
359 path = "";
360 if (obj->type == OBJ_TREE) {
361 process_tree(ctx, (struct tree *)obj, base, path);
362 continue;
363 }
364 if (obj->type == OBJ_BLOB) {
365 process_blob(ctx, (struct blob *)obj, base, path);
366 continue;
367 }
368 die("unknown pending object %s (%s)",
369 oid_to_hex(&obj->oid), name);
370 }
371 object_array_clear(&ctx->revs->pending);
372 }
373
374 static void do_traverse(struct traversal_context *ctx)
375 {
376 struct commit *commit;
377 struct strbuf csp; /* callee's scratch pad */
378 strbuf_init(&csp, PATH_MAX);
379
380 while ((commit = get_revision(ctx->revs)) != NULL) {
381 enum list_objects_filter_result r;
382
383 r = list_objects_filter__filter_object(ctx->revs->repo,
384 LOFS_COMMIT, &commit->object,
385 NULL, NULL, ctx->filter);
386
387 /*
388 * an uninteresting boundary commit may not have its tree
389 * parsed yet, but we are not going to show them anyway
390 */
391 if (!ctx->revs->tree_objects)
392 ; /* do not bother loading tree */
393 else if (get_commit_tree(commit)) {
394 struct tree *tree = get_commit_tree(commit);
395 tree->object.flags |= NOT_USER_GIVEN;
396 add_pending_tree(ctx->revs, tree);
397 } else if (commit->object.parsed) {
398 die(_("unable to load root tree for commit %s"),
399 oid_to_hex(&commit->object.oid));
400 }
401
402 if (r & LOFR_MARK_SEEN)
403 commit->object.flags |= SEEN;
404 if (r & LOFR_DO_SHOW)
405 ctx->show_commit(commit, ctx->show_data);
406
407 if (ctx->revs->tree_blobs_in_commit_order)
408 /*
409 * NEEDSWORK: Adding the tree and then flushing it here
410 * needs a reallocation for each commit. Can we pass the
411 * tree directory without allocation churn?
412 */
413 traverse_trees_and_blobs(ctx, &csp);
414 }
415 traverse_trees_and_blobs(ctx, &csp);
416 strbuf_release(&csp);
417 }
418
419 void traverse_commit_list(struct rev_info *revs,
420 show_commit_fn show_commit,
421 show_object_fn show_object,
422 void *show_data)
423 {
424 struct traversal_context ctx;
425 ctx.revs = revs;
426 ctx.show_commit = show_commit;
427 ctx.show_object = show_object;
428 ctx.show_data = show_data;
429 ctx.filter = NULL;
430 do_traverse(&ctx);
431 }
432
433 void traverse_commit_list_filtered(
434 struct list_objects_filter_options *filter_options,
435 struct rev_info *revs,
436 show_commit_fn show_commit,
437 show_object_fn show_object,
438 void *show_data,
439 struct oidset *omitted)
440 {
441 struct traversal_context ctx;
442
443 ctx.revs = revs;
444 ctx.show_object = show_object;
445 ctx.show_commit = show_commit;
446 ctx.show_data = show_data;
447 ctx.filter = list_objects_filter__init(omitted, filter_options);
448 do_traverse(&ctx);
449 list_objects_filter__free(ctx.filter);
450 }