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"
13static void process_blob(struct rev_info *revs,
15 struct blob *blob,
16 show_object_fn show,
17 struct strbuf *path,
18 const char *name,
19 void *cb_data,
20 filter_object_fn filter_fn,
21 void *filter_data)
22{
23 struct object *obj = &blob->object;
24 size_t pathlen;
25 enum list_objects_filter_result r = LOFR_MARK_SEEN | LOFR_DO_SHOW;
26 if (!revs->blob_objects)
28 return;
29 if (!obj)
30 die("bad blob object");
31 if (obj->flags & (UNINTERESTING | SEEN))
32 return;
33 /*
35 * Pre-filter known-missing objects when explicitly requested.
36 * Otherwise, a missing object error message may be reported
37 * later (depending on other filtering criteria).
38 *
39 * Note that this "--exclude-promisor-objects" pre-filtering
40 * may cause the actual filter to report an incomplete list
41 * of missing objects.
42 */
43 if (revs->exclude_promisor_objects &&
44 !has_object_file(&obj->oid) &&
45 is_promisor_object(&obj->oid))
46 return;
47 pathlen = path->len;
49 strbuf_addstr(path, name);
50 if (filter_fn)
51 r = filter_fn(LOFS_BLOB, obj,
52 path->buf, &path->buf[pathlen],
53 filter_data);
54 if (r & LOFR_MARK_SEEN)
55 obj->flags |= SEEN;
56 if (r & LOFR_DO_SHOW)
57 show(obj, path->buf, cb_data);
58 strbuf_setlen(path, pathlen);
59}
60/*
62 * Processing a gitlink entry currently does nothing, since
63 * we do not recurse into the subproject.
64 *
65 * We *could* eventually add a flag that actually does that,
66 * which would involve:
67 * - is the subproject actually checked out?
68 * - if so, see if the subproject has already been added
69 * to the alternates list, and add it if not.
70 * - process the commit (or tag) the gitlink points to
71 * recursively.
72 *
73 * However, it's unclear whether there is really ever any
74 * reason to see superprojects and subprojects as such a
75 * "unified" object pool (potentially resulting in a totally
76 * humongous pack - avoiding which was the whole point of
77 * having gitlinks in the first place!).
78 *
79 * So for now, there is just a note that we *could* follow
80 * the link, and how to do it. Whether it necessarily makes
81 * any sense what-so-ever to ever do that is another issue.
82 */
83static void process_gitlink(struct rev_info *revs,
84 const unsigned char *sha1,
85 show_object_fn show,
86 struct strbuf *path,
87 const char *name,
88 void *cb_data)
89{
90 /* Nothing to do */
91}
92static void process_tree(struct rev_info *revs,
94 struct tree *tree,
95 show_object_fn show,
96 struct strbuf *base,
97 const char *name,
98 void *cb_data,
99 filter_object_fn filter_fn,
100 void *filter_data)
101{
102 struct object *obj = &tree->object;
103 struct tree_desc desc;
104 struct name_entry entry;
105 enum interesting match = revs->diffopt.pathspec.nr == 0 ?
106 all_entries_interesting: entry_not_interesting;
107 int baselen = base->len;
108 enum list_objects_filter_result r = LOFR_MARK_SEEN | LOFR_DO_SHOW;
109 int gently = revs->ignore_missing_links ||
110 revs->exclude_promisor_objects;
111 if (!revs->tree_objects)
113 return;
114 if (!obj)
115 die("bad tree object");
116 if (obj->flags & (UNINTERESTING | SEEN))
117 return;
118 if (parse_tree_gently(tree, gently) < 0) {
119 if (revs->ignore_missing_links)
120 return;
121 /*
123 * Pre-filter known-missing tree objects when explicitly
124 * requested. This may cause the actual filter to report
125 * an incomplete list of missing objects.
126 */
127 if (revs->exclude_promisor_objects &&
128 is_promisor_object(&obj->oid))
129 return;
130 die("bad tree object %s", oid_to_hex(&obj->oid));
132 }
133 strbuf_addstr(base, name);
135 if (filter_fn)
136 r = filter_fn(LOFS_BEGIN_TREE, obj,
137 base->buf, &base->buf[baselen],
138 filter_data);
139 if (r & LOFR_MARK_SEEN)
140 obj->flags |= SEEN;
141 if (r & LOFR_DO_SHOW)
142 show(obj, base->buf, cb_data);
143 if (base->len)
144 strbuf_addch(base, '/');
145 init_tree_desc(&desc, tree->buffer, tree->size);
147 while (tree_entry(&desc, &entry)) {
149 if (match != all_entries_interesting) {
150 match = tree_entry_interesting(&entry, base, 0,
151 &revs->diffopt.pathspec);
152 if (match == all_entries_not_interesting)
153 break;
154 if (match == entry_not_interesting)
155 continue;
156 }
157 if (S_ISDIR(entry.mode))
159 process_tree(revs,
160 lookup_tree(entry.oid),
161 show, base, entry.path,
162 cb_data, filter_fn, filter_data);
163 else if (S_ISGITLINK(entry.mode))
164 process_gitlink(revs, entry.oid->hash,
165 show, base, entry.path,
166 cb_data);
167 else
168 process_blob(revs,
169 lookup_blob(entry.oid),
170 show, base, entry.path,
171 cb_data, filter_fn, filter_data);
172 }
173 if (filter_fn) {
175 r = filter_fn(LOFS_END_TREE, obj,
176 base->buf, &base->buf[baselen],
177 filter_data);
178 if (r & LOFR_MARK_SEEN)
179 obj->flags |= SEEN;
180 if (r & LOFR_DO_SHOW)
181 show(obj, base->buf, cb_data);
182 }
183 strbuf_setlen(base, baselen);
185 free_tree_buffer(tree);
186}
187static void mark_edge_parents_uninteresting(struct commit *commit,
189 struct rev_info *revs,
190 show_edge_fn show_edge)
191{
192 struct commit_list *parents;
193 for (parents = commit->parents; parents; parents = parents->next) {
195 struct commit *parent = parents->item;
196 if (!(parent->object.flags & UNINTERESTING))
197 continue;
198 mark_tree_uninteresting(get_commit_tree(parent));
199 if (revs->edge_hint && !(parent->object.flags & SHOWN)) {
200 parent->object.flags |= SHOWN;
201 show_edge(parent);
202 }
203 }
204}
205void mark_edges_uninteresting(struct rev_info *revs, show_edge_fn show_edge)
207{
208 struct commit_list *list;
209 int i;
210 for (list = revs->commits; list; list = list->next) {
212 struct commit *commit = list->item;
213 if (commit->object.flags & UNINTERESTING) {
215 mark_tree_uninteresting(get_commit_tree(commit));
216 if (revs->edge_hint_aggressive && !(commit->object.flags & SHOWN)) {
217 commit->object.flags |= SHOWN;
218 show_edge(commit);
219 }
220 continue;
221 }
222 mark_edge_parents_uninteresting(commit, revs, show_edge);
223 }
224 if (revs->edge_hint_aggressive) {
225 for (i = 0; i < revs->cmdline.nr; i++) {
226 struct object *obj = revs->cmdline.rev[i].item;
227 struct commit *commit = (struct commit *)obj;
228 if (obj->type != OBJ_COMMIT || !(obj->flags & UNINTERESTING))
229 continue;
230 mark_tree_uninteresting(get_commit_tree(commit));
231 if (!(obj->flags & SHOWN)) {
232 obj->flags |= SHOWN;
233 show_edge(commit);
234 }
235 }
236 }
237}
238static void add_pending_tree(struct rev_info *revs, struct tree *tree)
240{
241 add_pending_object(revs, &tree->object, "");
242}
243static void traverse_trees_and_blobs(struct rev_info *revs,
245 struct strbuf *base,
246 show_object_fn show_object,
247 void *show_data,
248 filter_object_fn filter_fn,
249 void *filter_data)
250{
251 int i;
252 assert(base->len == 0);
254 for (i = 0; i < revs->pending.nr; i++) {
256 struct object_array_entry *pending = revs->pending.objects + i;
257 struct object *obj = pending->item;
258 const char *name = pending->name;
259 const char *path = pending->path;
260 if (obj->flags & (UNINTERESTING | SEEN))
261 continue;
262 if (obj->type == OBJ_TAG) {
263 obj->flags |= SEEN;
264 show_object(obj, name, show_data);
265 continue;
266 }
267 if (!path)
268 path = "";
269 if (obj->type == OBJ_TREE) {
270 process_tree(revs, (struct tree *)obj, show_object,
271 base, path, show_data,
272 filter_fn, filter_data);
273 continue;
274 }
275 if (obj->type == OBJ_BLOB) {
276 process_blob(revs, (struct blob *)obj, show_object,
277 base, path, show_data,
278 filter_fn, filter_data);
279 continue;
280 }
281 die("unknown pending object %s (%s)",
282 oid_to_hex(&obj->oid), name);
283 }
284 object_array_clear(&revs->pending);
285}
286static void do_traverse(struct rev_info *revs,
288 show_commit_fn show_commit,
289 show_object_fn show_object,
290 void *show_data,
291 filter_object_fn filter_fn,
292 void *filter_data)
293{
294 struct commit *commit;
295 struct strbuf csp; /* callee's scratch pad */
296 strbuf_init(&csp, PATH_MAX);
297 while ((commit = get_revision(revs)) != NULL) {
299 /*
300 * an uninteresting boundary commit may not have its tree
301 * parsed yet, but we are not going to show them anyway
302 */
303 if (get_commit_tree(commit))
304 add_pending_tree(revs, get_commit_tree(commit));
305 show_commit(commit, show_data);
306 if (revs->tree_blobs_in_commit_order)
308 /*
309 * NEEDSWORK: Adding the tree and then flushing it here
310 * needs a reallocation for each commit. Can we pass the
311 * tree directory without allocation churn?
312 */
313 traverse_trees_and_blobs(revs, &csp,
314 show_object, show_data,
315 filter_fn, filter_data);
316 }
317 traverse_trees_and_blobs(revs, &csp,
318 show_object, show_data,
319 filter_fn, filter_data);
320 strbuf_release(&csp);
321}
322void traverse_commit_list(struct rev_info *revs,
324 show_commit_fn show_commit,
325 show_object_fn show_object,
326 void *show_data)
327{
328 do_traverse(revs, show_commit, show_object, show_data, NULL, NULL);
329}
330void traverse_commit_list_filtered(
332 struct list_objects_filter_options *filter_options,
333 struct rev_info *revs,
334 show_commit_fn show_commit,
335 show_object_fn show_object,
336 void *show_data,
337 struct oidset *omitted)
338{
339 filter_object_fn filter_fn = NULL;
340 filter_free_fn filter_free_fn = NULL;
341 void *filter_data = NULL;
342 filter_data = list_objects_filter__init(omitted, filter_options,
344 &filter_fn, &filter_free_fn);
345 do_traverse(revs, show_commit, show_object, show_data,
346 filter_fn, filter_data);
347 if (filter_data && filter_free_fn)
348 filter_free_fn(filter_data);
349}