Start preparing for 1.8.4.2
[alt-git.git] / reachable.c
blobe7e6a1e342200bbf4c37bd561e6a68222349418e
1 #include "cache.h"
2 #include "refs.h"
3 #include "tag.h"
4 #include "commit.h"
5 #include "blob.h"
6 #include "diff.h"
7 #include "revision.h"
8 #include "reachable.h"
9 #include "cache-tree.h"
10 #include "progress.h"
12 struct connectivity_progress {
13 struct progress *progress;
14 unsigned long count;
17 static void update_progress(struct connectivity_progress *cp)
19 cp->count++;
20 if ((cp->count & 1023) == 0)
21 display_progress(cp->progress, cp->count);
24 static void process_blob(struct blob *blob,
25 struct object_array *p,
26 struct name_path *path,
27 const char *name,
28 struct connectivity_progress *cp)
30 struct object *obj = &blob->object;
32 if (!blob)
33 die("bad blob object");
34 if (obj->flags & SEEN)
35 return;
36 obj->flags |= SEEN;
37 update_progress(cp);
38 /* Nothing to do, really .. The blob lookup was the important part */
41 static void process_gitlink(const unsigned char *sha1,
42 struct object_array *p,
43 struct name_path *path,
44 const char *name)
46 /* I don't think we want to recurse into this, really. */
49 static void process_tree(struct tree *tree,
50 struct object_array *p,
51 struct name_path *path,
52 const char *name,
53 struct connectivity_progress *cp)
55 struct object *obj = &tree->object;
56 struct tree_desc desc;
57 struct name_entry entry;
58 struct name_path me;
60 if (!tree)
61 die("bad tree object");
62 if (obj->flags & SEEN)
63 return;
64 obj->flags |= SEEN;
65 update_progress(cp);
66 if (parse_tree(tree) < 0)
67 die("bad tree object %s", sha1_to_hex(obj->sha1));
68 add_object(obj, p, path, name);
69 me.up = path;
70 me.elem = name;
71 me.elem_len = strlen(name);
73 init_tree_desc(&desc, tree->buffer, tree->size);
75 while (tree_entry(&desc, &entry)) {
76 if (S_ISDIR(entry.mode))
77 process_tree(lookup_tree(entry.sha1), p, &me, entry.path, cp);
78 else if (S_ISGITLINK(entry.mode))
79 process_gitlink(entry.sha1, p, &me, entry.path);
80 else
81 process_blob(lookup_blob(entry.sha1), p, &me, entry.path, cp);
83 free(tree->buffer);
84 tree->buffer = NULL;
87 static void process_tag(struct tag *tag, struct object_array *p,
88 const char *name, struct connectivity_progress *cp)
90 struct object *obj = &tag->object;
92 if (obj->flags & SEEN)
93 return;
94 obj->flags |= SEEN;
95 update_progress(cp);
97 if (parse_tag(tag) < 0)
98 die("bad tag object %s", sha1_to_hex(obj->sha1));
99 if (tag->tagged)
100 add_object(tag->tagged, p, NULL, name);
103 static void walk_commit_list(struct rev_info *revs,
104 struct connectivity_progress *cp)
106 int i;
107 struct commit *commit;
108 struct object_array objects = OBJECT_ARRAY_INIT;
110 /* Walk all commits, process their trees */
111 while ((commit = get_revision(revs)) != NULL) {
112 process_tree(commit->tree, &objects, NULL, "", cp);
113 update_progress(cp);
116 /* Then walk all the pending objects, recursively processing them too */
117 for (i = 0; i < revs->pending.nr; i++) {
118 struct object_array_entry *pending = revs->pending.objects + i;
119 struct object *obj = pending->item;
120 const char *name = pending->name;
121 if (obj->type == OBJ_TAG) {
122 process_tag((struct tag *) obj, &objects, name, cp);
123 continue;
125 if (obj->type == OBJ_TREE) {
126 process_tree((struct tree *)obj, &objects, NULL, name, cp);
127 continue;
129 if (obj->type == OBJ_BLOB) {
130 process_blob((struct blob *)obj, &objects, NULL, name, cp);
131 continue;
133 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
137 static int add_one_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
138 const char *email, unsigned long timestamp, int tz,
139 const char *message, void *cb_data)
141 struct object *object;
142 struct rev_info *revs = (struct rev_info *)cb_data;
144 object = parse_object(osha1);
145 if (object)
146 add_pending_object(revs, object, "");
147 object = parse_object(nsha1);
148 if (object)
149 add_pending_object(revs, object, "");
150 return 0;
153 static int add_one_ref(const char *path, const unsigned char *sha1, int flag, void *cb_data)
155 struct object *object = parse_object_or_die(sha1, path);
156 struct rev_info *revs = (struct rev_info *)cb_data;
158 add_pending_object(revs, object, "");
160 return 0;
163 static int add_one_reflog(const char *path, const unsigned char *sha1, int flag, void *cb_data)
165 for_each_reflog_ent(path, add_one_reflog_ent, cb_data);
166 return 0;
169 static void add_one_tree(const unsigned char *sha1, struct rev_info *revs)
171 struct tree *tree = lookup_tree(sha1);
172 if (tree)
173 add_pending_object(revs, &tree->object, "");
176 static void add_cache_tree(struct cache_tree *it, struct rev_info *revs)
178 int i;
180 if (it->entry_count >= 0)
181 add_one_tree(it->sha1, revs);
182 for (i = 0; i < it->subtree_nr; i++)
183 add_cache_tree(it->down[i]->cache_tree, revs);
186 static void add_cache_refs(struct rev_info *revs)
188 int i;
190 read_cache();
191 for (i = 0; i < active_nr; i++) {
193 * The index can contain blobs and GITLINKs, GITLINKs are hashes
194 * that don't actually point to objects in the repository, it's
195 * almost guaranteed that they are NOT blobs, so we don't call
196 * lookup_blob() on them, to avoid populating the hash table
197 * with invalid information
199 if (S_ISGITLINK(active_cache[i]->ce_mode))
200 continue;
202 lookup_blob(active_cache[i]->sha1);
204 * We could add the blobs to the pending list, but quite
205 * frankly, we don't care. Once we've looked them up, and
206 * added them as objects, we've really done everything
207 * there is to do for a blob
210 if (active_cache_tree)
211 add_cache_tree(active_cache_tree, revs);
214 void mark_reachable_objects(struct rev_info *revs, int mark_reflog,
215 struct progress *progress)
217 struct connectivity_progress cp;
220 * Set up revision parsing, and mark us as being interested
221 * in all object types, not just commits.
223 revs->tag_objects = 1;
224 revs->blob_objects = 1;
225 revs->tree_objects = 1;
227 /* Add all refs from the index file */
228 add_cache_refs(revs);
230 /* Add all external refs */
231 for_each_ref(add_one_ref, revs);
233 /* Add all reflog info */
234 if (mark_reflog)
235 for_each_reflog(add_one_reflog, revs);
237 cp.progress = progress;
238 cp.count = 0;
241 * Set up the revision walk - this will move all commits
242 * from the pending list to the commit walking list.
244 if (prepare_revision_walk(revs))
245 die("revision walk setup failed");
246 walk_commit_list(revs, &cp);
247 display_progress(cp.progress, cp.count);