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"
14struct traversal_context {
16 struct rev_info *revs;
17 show_object_fn show_object;
18 show_commit_fn show_commit;
19 void *show_data;
20 filter_object_fn filter_fn;
21 void *filter_data;
22};
23static 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 = LOFR_MARK_SEEN | LOFR_DO_SHOW;
32 if (!ctx->revs->blob_objects)
34 return;
35 if (!obj)
36 die("bad blob object");
37 if (obj->flags & (UNINTERESTING | SEEN))
38 return;
39 /*
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 pathlen = path->len;
55 strbuf_addstr(path, name);
56 if (!(obj->flags & USER_GIVEN) && ctx->filter_fn)
57 r = ctx->filter_fn(LOFS_BLOB, obj,
58 path->buf, &path->buf[pathlen],
59 ctx->filter_data);
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/*
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 */
89static 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}
96static void process_tree(struct traversal_context *ctx,
98 struct tree *tree,
99 struct strbuf *base,
100 const char *name);
101static 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 init_tree_desc(&desc, tree->buffer, tree->size);
112 while (tree_entry(&desc, &entry)) {
114 if (match != all_entries_interesting) {
115 match = tree_entry_interesting(&entry, base, 0,
116 &ctx->revs->diffopt.pathspec);
117 if (match == all_entries_not_interesting)
118 break;
119 if (match == entry_not_interesting)
120 continue;
121 }
122 if (S_ISDIR(entry.mode))
124 process_tree(ctx,
125 lookup_tree(the_repository, entry.oid),
126 base, entry.path);
127 else if (S_ISGITLINK(entry.mode))
128 process_gitlink(ctx, entry.oid->hash,
129 base, entry.path);
130 else
131 process_blob(ctx,
132 lookup_blob(the_repository, entry.oid),
133 base, entry.path);
134 }
135}
136static void process_tree(struct traversal_context *ctx,
138 struct tree *tree,
139 struct strbuf *base,
140 const char *name)
141{
142 struct object *obj = &tree->object;
143 struct rev_info *revs = ctx->revs;
144 int baselen = base->len;
145 enum list_objects_filter_result r = LOFR_MARK_SEEN | LOFR_DO_SHOW;
146 int gently = revs->ignore_missing_links ||
147 revs->exclude_promisor_objects;
148 if (!revs->tree_objects)
150 return;
151 if (!obj)
152 die("bad tree object");
153 if (obj->flags & (UNINTERESTING | SEEN))
154 return;
155 if (parse_tree_gently(tree, gently) < 0) {
156 if (revs->ignore_missing_links)
157 return;
158 /*
160 * Pre-filter known-missing tree objects when explicitly
161 * requested. This may cause the actual filter to report
162 * an incomplete list of missing objects.
163 */
164 if (revs->exclude_promisor_objects &&
165 is_promisor_object(&obj->oid))
166 return;
167 die("bad tree object %s", oid_to_hex(&obj->oid));
169 }
170 strbuf_addstr(base, name);
172 if (!(obj->flags & USER_GIVEN) && ctx->filter_fn)
173 r = ctx->filter_fn(LOFS_BEGIN_TREE, obj,
174 base->buf, &base->buf[baselen],
175 ctx->filter_data);
176 if (r & LOFR_MARK_SEEN)
177 obj->flags |= SEEN;
178 if (r & LOFR_DO_SHOW)
179 ctx->show_object(obj, base->buf, ctx->show_data);
180 if (base->len)
181 strbuf_addch(base, '/');
182 process_tree_contents(ctx, tree, base);
184 if (!(obj->flags & USER_GIVEN) && ctx->filter_fn) {
186 r = ctx->filter_fn(LOFS_END_TREE, obj,
187 base->buf, &base->buf[baselen],
188 ctx->filter_data);
189 if (r & LOFR_MARK_SEEN)
190 obj->flags |= SEEN;
191 if (r & LOFR_DO_SHOW)
192 ctx->show_object(obj, base->buf, ctx->show_data);
193 }
194 strbuf_setlen(base, baselen);
196 free_tree_buffer(tree);
197}
198static void mark_edge_parents_uninteresting(struct commit *commit,
200 struct rev_info *revs,
201 show_edge_fn show_edge)
202{
203 struct commit_list *parents;
204 for (parents = commit->parents; parents; parents = parents->next) {
206 struct commit *parent = parents->item;
207 if (!(parent->object.flags & UNINTERESTING))
208 continue;
209 mark_tree_uninteresting(get_commit_tree(parent));
210 if (revs->edge_hint && !(parent->object.flags & SHOWN)) {
211 parent->object.flags |= SHOWN;
212 show_edge(parent);
213 }
214 }
215}
216void mark_edges_uninteresting(struct rev_info *revs, show_edge_fn show_edge)
218{
219 struct commit_list *list;
220 int i;
221 for (list = revs->commits; list; list = list->next) {
223 struct commit *commit = list->item;
224 if (commit->object.flags & UNINTERESTING) {
226 mark_tree_uninteresting(get_commit_tree(commit));
227 if (revs->edge_hint_aggressive && !(commit->object.flags & SHOWN)) {
228 commit->object.flags |= SHOWN;
229 show_edge(commit);
230 }
231 continue;
232 }
233 mark_edge_parents_uninteresting(commit, revs, show_edge);
234 }
235 if (revs->edge_hint_aggressive) {
236 for (i = 0; i < revs->cmdline.nr; i++) {
237 struct object *obj = revs->cmdline.rev[i].item;
238 struct commit *commit = (struct commit *)obj;
239 if (obj->type != OBJ_COMMIT || !(obj->flags & UNINTERESTING))
240 continue;
241 mark_tree_uninteresting(get_commit_tree(commit));
242 if (!(obj->flags & SHOWN)) {
243 obj->flags |= SHOWN;
244 show_edge(commit);
245 }
246 }
247 }
248}
249static void add_pending_tree(struct rev_info *revs, struct tree *tree)
251{
252 add_pending_object(revs, &tree->object, "");
253}
254static void traverse_trees_and_blobs(struct traversal_context *ctx,
256 struct strbuf *base)
257{
258 int i;
259 assert(base->len == 0);
261 for (i = 0; i < ctx->revs->pending.nr; i++) {
263 struct object_array_entry *pending = ctx->revs->pending.objects + i;
264 struct object *obj = pending->item;
265 const char *name = pending->name;
266 const char *path = pending->path;
267 if (obj->flags & (UNINTERESTING | SEEN))
268 continue;
269 if (obj->type == OBJ_TAG) {
270 obj->flags |= SEEN;
271 ctx->show_object(obj, name, ctx->show_data);
272 continue;
273 }
274 if (!path)
275 path = "";
276 if (obj->type == OBJ_TREE) {
277 process_tree(ctx, (struct tree *)obj, base, path);
278 continue;
279 }
280 if (obj->type == OBJ_BLOB) {
281 process_blob(ctx, (struct blob *)obj, base, path);
282 continue;
283 }
284 die("unknown pending object %s (%s)",
285 oid_to_hex(&obj->oid), name);
286 }
287 object_array_clear(&ctx->revs->pending);
288}
289static void do_traverse(struct traversal_context *ctx)
291{
292 struct commit *commit;
293 struct strbuf csp; /* callee's scratch pad */
294 strbuf_init(&csp, PATH_MAX);
295 while ((commit = get_revision(ctx->revs)) != NULL) {
297 /*
298 * an uninteresting boundary commit may not have its tree
299 * parsed yet, but we are not going to show them anyway
300 */
301 if (get_commit_tree(commit))
302 add_pending_tree(ctx->revs, get_commit_tree(commit));
303 ctx->show_commit(commit, ctx->show_data);
304 if (ctx->revs->tree_blobs_in_commit_order)
306 /*
307 * NEEDSWORK: Adding the tree and then flushing it here
308 * needs a reallocation for each commit. Can we pass the
309 * tree directory without allocation churn?
310 */
311 traverse_trees_and_blobs(ctx, &csp);
312 }
313 traverse_trees_and_blobs(ctx, &csp);
314 strbuf_release(&csp);
315}
316void traverse_commit_list(struct rev_info *revs,
318 show_commit_fn show_commit,
319 show_object_fn show_object,
320 void *show_data)
321{
322 struct traversal_context ctx;
323 ctx.revs = revs;
324 ctx.show_commit = show_commit;
325 ctx.show_object = show_object;
326 ctx.show_data = show_data;
327 ctx.filter_fn = NULL;
328 ctx.filter_data = NULL;
329 do_traverse(&ctx);
330}
331void traverse_commit_list_filtered(
333 struct list_objects_filter_options *filter_options,
334 struct rev_info *revs,
335 show_commit_fn show_commit,
336 show_object_fn show_object,
337 void *show_data,
338 struct oidset *omitted)
339{
340 struct traversal_context ctx;
341 filter_free_fn filter_free_fn = NULL;
342 ctx.revs = revs;
344 ctx.show_object = show_object;
345 ctx.show_commit = show_commit;
346 ctx.show_data = show_data;
347 ctx.filter_fn = NULL;
348 ctx.filter_data = list_objects_filter__init(omitted, filter_options,
350 &ctx.filter_fn, &filter_free_fn);
351 do_traverse(&ctx);
352 if (ctx.filter_data && filter_free_fn)
353 filter_free_fn(ctx.filter_data);
354}