git-multimail: update to release 1.2.0
[git.git] / reachable.c
blob9cff25b490f7ec7c5535647afe017326a6984520
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"
11 #include "list-objects.h"
13 struct connectivity_progress {
14 struct progress *progress;
15 unsigned long count;
18 static void update_progress(struct connectivity_progress *cp)
20 cp->count++;
21 if ((cp->count & 1023) == 0)
22 display_progress(cp->progress, cp->count);
25 static int add_one_ref(const char *path, const struct object_id *oid,
26 int flag, void *cb_data)
28 struct object *object = parse_object_or_die(oid->hash, path);
29 struct rev_info *revs = (struct rev_info *)cb_data;
31 add_pending_object(revs, object, "");
33 return 0;
37 * The traversal will have already marked us as SEEN, so we
38 * only need to handle any progress reporting here.
40 static void mark_object(struct object *obj, const struct name_path *path,
41 const char *name, void *data)
43 update_progress(data);
46 static void mark_commit(struct commit *c, void *data)
48 mark_object(&c->object, NULL, NULL, data);
51 struct recent_data {
52 struct rev_info *revs;
53 unsigned long timestamp;
56 static void add_recent_object(const unsigned char *sha1,
57 unsigned long mtime,
58 struct recent_data *data)
60 struct object *obj;
61 enum object_type type;
63 if (mtime <= data->timestamp)
64 return;
67 * We do not want to call parse_object here, because
68 * inflating blobs and trees could be very expensive.
69 * However, we do need to know the correct type for
70 * later processing, and the revision machinery expects
71 * commits and tags to have been parsed.
73 type = sha1_object_info(sha1, NULL);
74 if (type < 0)
75 die("unable to get object info for %s", sha1_to_hex(sha1));
77 switch (type) {
78 case OBJ_TAG:
79 case OBJ_COMMIT:
80 obj = parse_object_or_die(sha1, NULL);
81 break;
82 case OBJ_TREE:
83 obj = (struct object *)lookup_tree(sha1);
84 break;
85 case OBJ_BLOB:
86 obj = (struct object *)lookup_blob(sha1);
87 break;
88 default:
89 die("unknown object type for %s: %s",
90 sha1_to_hex(sha1), typename(type));
93 if (!obj)
94 die("unable to lookup %s", sha1_to_hex(sha1));
96 add_pending_object(data->revs, obj, "");
99 static int add_recent_loose(const unsigned char *sha1,
100 const char *path, void *data)
102 struct stat st;
103 struct object *obj = lookup_object(sha1);
105 if (obj && obj->flags & SEEN)
106 return 0;
108 if (stat(path, &st) < 0) {
110 * It's OK if an object went away during our iteration; this
111 * could be due to a simultaneous repack. But anything else
112 * we should abort, since we might then fail to mark objects
113 * which should not be pruned.
115 if (errno == ENOENT)
116 return 0;
117 return error("unable to stat %s: %s",
118 sha1_to_hex(sha1), strerror(errno));
121 add_recent_object(sha1, st.st_mtime, data);
122 return 0;
125 static int add_recent_packed(const unsigned char *sha1,
126 struct packed_git *p, uint32_t pos,
127 void *data)
129 struct object *obj = lookup_object(sha1);
131 if (obj && obj->flags & SEEN)
132 return 0;
133 add_recent_object(sha1, p->mtime, data);
134 return 0;
137 int add_unseen_recent_objects_to_traversal(struct rev_info *revs,
138 unsigned long timestamp)
140 struct recent_data data;
141 int r;
143 data.revs = revs;
144 data.timestamp = timestamp;
146 r = for_each_loose_object(add_recent_loose, &data,
147 FOR_EACH_OBJECT_LOCAL_ONLY);
148 if (r)
149 return r;
150 return for_each_packed_object(add_recent_packed, &data,
151 FOR_EACH_OBJECT_LOCAL_ONLY);
154 void mark_reachable_objects(struct rev_info *revs, int mark_reflog,
155 unsigned long mark_recent,
156 struct progress *progress)
158 struct connectivity_progress cp;
161 * Set up revision parsing, and mark us as being interested
162 * in all object types, not just commits.
164 revs->tag_objects = 1;
165 revs->blob_objects = 1;
166 revs->tree_objects = 1;
168 /* Add all refs from the index file */
169 add_index_objects_to_pending(revs, 0);
171 /* Add all external refs */
172 for_each_ref(add_one_ref, revs);
174 /* detached HEAD is not included in the list above */
175 head_ref(add_one_ref, revs);
177 /* Add all reflog info */
178 if (mark_reflog)
179 add_reflogs_to_pending(revs, 0);
181 cp.progress = progress;
182 cp.count = 0;
185 * Set up the revision walk - this will move all commits
186 * from the pending list to the commit walking list.
188 if (prepare_revision_walk(revs))
189 die("revision walk setup failed");
190 traverse_commit_list(revs, mark_commit, mark_object, &cp);
192 if (mark_recent) {
193 revs->ignore_missing_links = 1;
194 if (add_unseen_recent_objects_to_traversal(revs, mark_recent))
195 die("unable to mark recent objects");
196 if (prepare_revision_walk(revs))
197 die("revision walk setup failed");
198 traverse_commit_list(revs, mark_commit, mark_object, &cp);
201 display_progress(cp.progress, cp.count);