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"
15struct traversal_context {
17 struct rev_info *revs;
18 show_object_fn show_object;
19 show_commit_fn show_commit;
20 void *show_data;
21 filter_object_fn filter_fn;
22 void *filter_data;
23};
24static void process_blob(struct traversal_context *ctx,
26 struct blob *blob,
27 struct strbuf *path,
28 const char *name)
29{
30 struct object *obj = &blob->object;
31 size_t pathlen;
32 enum list_objects_filter_result r = LOFR_MARK_SEEN | LOFR_DO_SHOW;
33 if (!ctx->revs->blob_objects)
35 return;
36 if (!obj)
37 die("bad blob object");
38 if (obj->flags & (UNINTERESTING | SEEN))
39 return;
40 /*
42 * Pre-filter known-missing objects when explicitly requested.
43 * Otherwise, a missing object error message may be reported
44 * later (depending on other filtering criteria).
45 *
46 * Note that this "--exclude-promisor-objects" pre-filtering
47 * may cause the actual filter to report an incomplete list
48 * of missing objects.
49 */
50 if (ctx->revs->exclude_promisor_objects &&
51 !has_object_file(&obj->oid) &&
52 is_promisor_object(&obj->oid))
53 return;
54 pathlen = path->len;
56 strbuf_addstr(path, name);
57 if ((obj->flags & NOT_USER_GIVEN) && ctx->filter_fn)
58 r = ctx->filter_fn(ctx->revs->repo,
59 LOFS_BLOB, obj,
60 path->buf, &path->buf[pathlen],
61 ctx->filter_data);
62 if (r & LOFR_MARK_SEEN)
63 obj->flags |= SEEN;
64 if (r & LOFR_DO_SHOW)
65 ctx->show_object(obj, path->buf, ctx->show_data);
66 strbuf_setlen(path, pathlen);
67}
68/*
70 * Processing a gitlink entry currently does nothing, since
71 * we do not recurse into the subproject.
72 *
73 * We *could* eventually add a flag that actually does that,
74 * which would involve:
75 * - is the subproject actually checked out?
76 * - if so, see if the subproject has already been added
77 * to the alternates list, and add it if not.
78 * - process the commit (or tag) the gitlink points to
79 * recursively.
80 *
81 * However, it's unclear whether there is really ever any
82 * reason to see superprojects and subprojects as such a
83 * "unified" object pool (potentially resulting in a totally
84 * humongous pack - avoiding which was the whole point of
85 * having gitlinks in the first place!).
86 *
87 * So for now, there is just a note that we *could* follow
88 * the link, and how to do it. Whether it necessarily makes
89 * any sense what-so-ever to ever do that is another issue.
90 */
91static void process_gitlink(struct traversal_context *ctx,
92 const unsigned char *sha1,
93 struct strbuf *path,
94 const char *name)
95{
96 /* Nothing to do */
97}
98static void process_tree(struct traversal_context *ctx,
100 struct tree *tree,
101 struct strbuf *base,
102 const char *name);
103static void process_tree_contents(struct traversal_context *ctx,
105 struct tree *tree,
106 struct strbuf *base)
107{
108 struct tree_desc desc;
109 struct name_entry entry;
110 enum interesting match = ctx->revs->diffopt.pathspec.nr == 0 ?
111 all_entries_interesting : entry_not_interesting;
112 init_tree_desc(&desc, tree->buffer, tree->size);
114 while (tree_entry(&desc, &entry)) {
116 if (match != all_entries_interesting) {
117 match = tree_entry_interesting(ctx->revs->repo->index,
118 &entry, base, 0,
119 &ctx->revs->diffopt.pathspec);
120 if (match == all_entries_not_interesting)
121 break;
122 if (match == entry_not_interesting)
123 continue;
124 }
125 if (S_ISDIR(entry.mode)) {
127 struct tree *t = lookup_tree(ctx->revs->repo, &entry.oid);
128 t->object.flags |= NOT_USER_GIVEN;
129 process_tree(ctx, t, base, entry.path);
130 }
131 else if (S_ISGITLINK(entry.mode))
132 process_gitlink(ctx, entry.oid.hash,
133 base, entry.path);
134 else {
135 struct blob *b = lookup_blob(ctx->revs->repo, &entry.oid);
136 b->object.flags |= NOT_USER_GIVEN;
137 process_blob(ctx, b, base, entry.path);
138 }
139 }
140}
141static void process_tree(struct traversal_context *ctx,
143 struct tree *tree,
144 struct strbuf *base,
145 const char *name)
146{
147 struct object *obj = &tree->object;
148 struct rev_info *revs = ctx->revs;
149 int baselen = base->len;
150 enum list_objects_filter_result r = LOFR_MARK_SEEN | LOFR_DO_SHOW;
151 int failed_parse;
152 if (!revs->tree_objects)
154 return;
155 if (!obj)
156 die("bad tree object");
157 if (obj->flags & (UNINTERESTING | SEEN))
158 return;
159 failed_parse = parse_tree_gently(tree, 1);
161 if (failed_parse) {
162 if (revs->ignore_missing_links)
163 return;
164 /*
166 * Pre-filter known-missing tree objects when explicitly
167 * requested. This may cause the actual filter to report
168 * an incomplete list of missing objects.
169 */
170 if (revs->exclude_promisor_objects &&
171 is_promisor_object(&obj->oid))
172 return;
173 if (!revs->do_not_die_on_missing_tree)
175 die("bad tree object %s", oid_to_hex(&obj->oid));
176 }
177 strbuf_addstr(base, name);
179 if ((obj->flags & NOT_USER_GIVEN) && ctx->filter_fn)
180 r = ctx->filter_fn(ctx->revs->repo,
181 LOFS_BEGIN_TREE, obj,
182 base->buf, &base->buf[baselen],
183 ctx->filter_data);
184 if (r & LOFR_MARK_SEEN)
185 obj->flags |= SEEN;
186 if (r & LOFR_DO_SHOW)
187 ctx->show_object(obj, base->buf, ctx->show_data);
188 if (base->len)
189 strbuf_addch(base, '/');
190 if (r & LOFR_SKIP_TREE)
192 trace_printf("Skipping contents of tree %s...\n", base->buf);
193 else if (!failed_parse)
194 process_tree_contents(ctx, tree, base);
195 if ((obj->flags & NOT_USER_GIVEN) && ctx->filter_fn) {
197 r = ctx->filter_fn(ctx->revs->repo,
198 LOFS_END_TREE, obj,
199 base->buf, &base->buf[baselen],
200 ctx->filter_data);
201 if (r & LOFR_MARK_SEEN)
202 obj->flags |= SEEN;
203 if (r & LOFR_DO_SHOW)
204 ctx->show_object(obj, base->buf, ctx->show_data);
205 }
206 strbuf_setlen(base, baselen);
208 free_tree_buffer(tree);
209}
210static void mark_edge_parents_uninteresting(struct commit *commit,
212 struct rev_info *revs,
213 show_edge_fn show_edge)
214{
215 struct commit_list *parents;
216 for (parents = commit->parents; parents; parents = parents->next) {
218 struct commit *parent = parents->item;
219 if (!(parent->object.flags & UNINTERESTING))
220 continue;
221 mark_tree_uninteresting(revs->repo, get_commit_tree(parent));
222 if (revs->edge_hint && !(parent->object.flags & SHOWN)) {
223 parent->object.flags |= SHOWN;
224 show_edge(parent);
225 }
226 }
227}
228void mark_edges_uninteresting(struct rev_info *revs, show_edge_fn show_edge)
230{
231 struct commit_list *list;
232 int i;
233 for (list = revs->commits; list; list = list->next) {
235 struct commit *commit = list->item;
236 if (commit->object.flags & UNINTERESTING) {
238 mark_tree_uninteresting(revs->repo,
239 get_commit_tree(commit));
240 if (revs->edge_hint_aggressive && !(commit->object.flags & SHOWN)) {
241 commit->object.flags |= SHOWN;
242 show_edge(commit);
243 }
244 continue;
245 }
246 mark_edge_parents_uninteresting(commit, revs, show_edge);
247 }
248 if (revs->edge_hint_aggressive) {
249 for (i = 0; i < revs->cmdline.nr; i++) {
250 struct object *obj = revs->cmdline.rev[i].item;
251 struct commit *commit = (struct commit *)obj;
252 if (obj->type != OBJ_COMMIT || !(obj->flags & UNINTERESTING))
253 continue;
254 mark_tree_uninteresting(revs->repo,
255 get_commit_tree(commit));
256 if (!(obj->flags & SHOWN)) {
257 obj->flags |= SHOWN;
258 show_edge(commit);
259 }
260 }
261 }
262}
263static void add_pending_tree(struct rev_info *revs, struct tree *tree)
265{
266 add_pending_object(revs, &tree->object, "");
267}
268static void traverse_trees_and_blobs(struct traversal_context *ctx,
270 struct strbuf *base)
271{
272 int i;
273 assert(base->len == 0);
275 for (i = 0; i < ctx->revs->pending.nr; i++) {
277 struct object_array_entry *pending = ctx->revs->pending.objects + i;
278 struct object *obj = pending->item;
279 const char *name = pending->name;
280 const char *path = pending->path;
281 if (obj->flags & (UNINTERESTING | SEEN))
282 continue;
283 if (obj->type == OBJ_TAG) {
284 obj->flags |= SEEN;
285 ctx->show_object(obj, name, ctx->show_data);
286 continue;
287 }
288 if (!path)
289 path = "";
290 if (obj->type == OBJ_TREE) {
291 process_tree(ctx, (struct tree *)obj, base, path);
292 continue;
293 }
294 if (obj->type == OBJ_BLOB) {
295 process_blob(ctx, (struct blob *)obj, base, path);
296 continue;
297 }
298 die("unknown pending object %s (%s)",
299 oid_to_hex(&obj->oid), name);
300 }
301 object_array_clear(&ctx->revs->pending);
302}
303static void do_traverse(struct traversal_context *ctx)
305{
306 struct commit *commit;
307 struct strbuf csp; /* callee's scratch pad */
308 strbuf_init(&csp, PATH_MAX);
309 while ((commit = get_revision(ctx->revs)) != NULL) {
311 /*
312 * an uninteresting boundary commit may not have its tree
313 * parsed yet, but we are not going to show them anyway
314 */
315 if (get_commit_tree(commit)) {
316 struct tree *tree = get_commit_tree(commit);
317 tree->object.flags |= NOT_USER_GIVEN;
318 add_pending_tree(ctx->revs, tree);
319 }
320 ctx->show_commit(commit, ctx->show_data);
321 if (ctx->revs->tree_blobs_in_commit_order)
323 /*
324 * NEEDSWORK: Adding the tree and then flushing it here
325 * needs a reallocation for each commit. Can we pass the
326 * tree directory without allocation churn?
327 */
328 traverse_trees_and_blobs(ctx, &csp);
329 }
330 traverse_trees_and_blobs(ctx, &csp);
331 strbuf_release(&csp);
332}
333void traverse_commit_list(struct rev_info *revs,
335 show_commit_fn show_commit,
336 show_object_fn show_object,
337 void *show_data)
338{
339 struct traversal_context ctx;
340 ctx.revs = revs;
341 ctx.show_commit = show_commit;
342 ctx.show_object = show_object;
343 ctx.show_data = show_data;
344 ctx.filter_fn = NULL;
345 ctx.filter_data = NULL;
346 do_traverse(&ctx);
347}
348void traverse_commit_list_filtered(
350 struct list_objects_filter_options *filter_options,
351 struct rev_info *revs,
352 show_commit_fn show_commit,
353 show_object_fn show_object,
354 void *show_data,
355 struct oidset *omitted)
356{
357 struct traversal_context ctx;
358 filter_free_fn filter_free_fn = NULL;
359 ctx.revs = revs;
361 ctx.show_object = show_object;
362 ctx.show_commit = show_commit;
363 ctx.show_data = show_data;
364 ctx.filter_fn = NULL;
365 ctx.filter_data = list_objects_filter__init(omitted, filter_options,
367 &ctx.filter_fn, &filter_free_fn);
368 do_traverse(&ctx);
369 if (ctx.filter_data && filter_free_fn)
370 filter_free_fn(ctx.filter_data);
371}