Merge tag 'v2.14.1'
[git/raj.git] / reachable.c
blobc62efbfd43b9c4ddc25d6768d55bddc745f5c14b
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 rev_info *revs = (struct rev_info *)cb_data;
29 struct object *object;
31 if ((flag & REF_ISSYMREF) && (flag & REF_ISBROKEN)) {
32 warning("symbolic ref is dangling: %s", path);
33 return 0;
36 object = parse_object_or_die(oid, path);
37 add_pending_object(revs, object, "");
39 return 0;
43 * The traversal will have already marked us as SEEN, so we
44 * only need to handle any progress reporting here.
46 static void mark_object(struct object *obj, const char *name, void *data)
48 update_progress(data);
51 static void mark_commit(struct commit *c, void *data)
53 mark_object(&c->object, NULL, data);
56 struct recent_data {
57 struct rev_info *revs;
58 timestamp_t timestamp;
61 static void add_recent_object(const struct object_id *oid,
62 timestamp_t mtime,
63 struct recent_data *data)
65 struct object *obj;
66 enum object_type type;
68 if (mtime <= data->timestamp)
69 return;
72 * We do not want to call parse_object here, because
73 * inflating blobs and trees could be very expensive.
74 * However, we do need to know the correct type for
75 * later processing, and the revision machinery expects
76 * commits and tags to have been parsed.
78 type = sha1_object_info(oid->hash, NULL);
79 if (type < 0)
80 die("unable to get object info for %s", oid_to_hex(oid));
82 switch (type) {
83 case OBJ_TAG:
84 case OBJ_COMMIT:
85 obj = parse_object_or_die(oid, NULL);
86 break;
87 case OBJ_TREE:
88 obj = (struct object *)lookup_tree(oid);
89 break;
90 case OBJ_BLOB:
91 obj = (struct object *)lookup_blob(oid);
92 break;
93 default:
94 die("unknown object type for %s: %s",
95 oid_to_hex(oid), typename(type));
98 if (!obj)
99 die("unable to lookup %s", oid_to_hex(oid));
101 add_pending_object(data->revs, obj, "");
104 static int add_recent_loose(const struct object_id *oid,
105 const char *path, void *data)
107 struct stat st;
108 struct object *obj = lookup_object(oid->hash);
110 if (obj && obj->flags & SEEN)
111 return 0;
113 if (stat(path, &st) < 0) {
115 * It's OK if an object went away during our iteration; this
116 * could be due to a simultaneous repack. But anything else
117 * we should abort, since we might then fail to mark objects
118 * which should not be pruned.
120 if (errno == ENOENT)
121 return 0;
122 return error_errno("unable to stat %s", oid_to_hex(oid));
125 add_recent_object(oid, st.st_mtime, data);
126 return 0;
129 static int add_recent_packed(const struct object_id *oid,
130 struct packed_git *p, uint32_t pos,
131 void *data)
133 struct object *obj = lookup_object(oid->hash);
135 if (obj && obj->flags & SEEN)
136 return 0;
137 add_recent_object(oid, p->mtime, data);
138 return 0;
141 int add_unseen_recent_objects_to_traversal(struct rev_info *revs,
142 timestamp_t timestamp)
144 struct recent_data data;
145 int r;
147 data.revs = revs;
148 data.timestamp = timestamp;
150 r = for_each_loose_object(add_recent_loose, &data,
151 FOR_EACH_OBJECT_LOCAL_ONLY);
152 if (r)
153 return r;
154 return for_each_packed_object(add_recent_packed, &data,
155 FOR_EACH_OBJECT_LOCAL_ONLY);
158 void mark_reachable_objects(struct rev_info *revs, int mark_reflog,
159 timestamp_t mark_recent, struct progress *progress)
161 struct connectivity_progress cp;
164 * Set up revision parsing, and mark us as being interested
165 * in all object types, not just commits.
167 revs->tag_objects = 1;
168 revs->blob_objects = 1;
169 revs->tree_objects = 1;
171 /* Add all refs from the index file */
172 add_index_objects_to_pending(revs, 0);
174 /* Add all external refs */
175 for_each_ref(add_one_ref, revs);
177 /* detached HEAD is not included in the list above */
178 head_ref(add_one_ref, revs);
180 /* Add all reflog info */
181 if (mark_reflog)
182 add_reflogs_to_pending(revs, 0);
184 cp.progress = progress;
185 cp.count = 0;
188 * Set up the revision walk - this will move all commits
189 * from the pending list to the commit walking list.
191 if (prepare_revision_walk(revs))
192 die("revision walk setup failed");
193 traverse_commit_list(revs, mark_commit, mark_object, &cp);
195 if (mark_recent) {
196 revs->ignore_missing_links = 1;
197 if (add_unseen_recent_objects_to_traversal(revs, mark_recent))
198 die("unable to mark recent objects");
199 if (prepare_revision_walk(revs))
200 die("revision walk setup failed");
201 traverse_commit_list(revs, mark_commit, mark_object, &cp);
204 display_progress(cp.progress, cp.count);