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9442147 Move traversal of reachable objects into a separate library.
Junio C Hamano authored
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"
dc34719 @pclouds prune: show progress while marking reachable objects
pclouds authored
10 #include "progress.h"
5f78a43 @peff reachable: use traverse_commit_list instead of custom walk
peff authored
11 #include "list-objects.h"
9442147 Move traversal of reachable objects into a separate library.
Junio C Hamano authored
12
0b26abc @peff reachable: per-object progress
peff authored
13 struct connectivity_progress {
14 struct progress *progress;
15 unsigned long count;
16 };
17
18 static void update_progress(struct connectivity_progress *cp)
19 {
20 cp->count++;
21 if ((cp->count & 1023) == 0)
22 display_progress(cp->progress, cp->count);
23 }
24
635170f @mhagger add_one_ref(): rewrite to take an object_id argument
mhagger authored
25 static int add_one_ref(const char *path, const struct object_id *oid,
26 int flag, void *cb_data)
9442147 Move traversal of reachable objects into a separate library.
Junio C Hamano authored
27 {
635170f @mhagger add_one_ref(): rewrite to take an object_id argument
mhagger authored
28 struct object *object = parse_object_or_die(oid->hash, path);
9442147 Move traversal of reachable objects into a separate library.
Junio C Hamano authored
29 struct rev_info *revs = (struct rev_info *)cb_data;
30
31 add_pending_object(revs, object, "");
32
33 return 0;
34 }
35
5f78a43 @peff reachable: use traverse_commit_list instead of custom walk
peff authored
36 /*
37 * The traversal will have already marked us as SEEN, so we
38 * only need to handle any progress reporting here.
39 */
40 static void mark_object(struct object *obj, const struct name_path *path,
41 const char *name, void *data)
42 {
43 update_progress(data);
44 }
45
46 static void mark_commit(struct commit *c, void *data)
47 {
48 mark_object(&c->object, NULL, NULL, data);
49 }
50
d3038d2 @peff prune: keep objects reachable from recent objects
peff authored
51 struct recent_data {
52 struct rev_info *revs;
53 unsigned long timestamp;
54 };
55
56 static void add_recent_object(const unsigned char *sha1,
57 unsigned long mtime,
58 struct recent_data *data)
59 {
60 struct object *obj;
61 enum object_type type;
62
63 if (mtime <= data->timestamp)
64 return;
65
66 /*
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.
72 */
73 type = sha1_object_info(sha1, NULL);
74 if (type < 0)
75 die("unable to get object info for %s", sha1_to_hex(sha1));
76
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));
91 }
92
93 if (!obj)
94 die("unable to lookup %s", sha1_to_hex(sha1));
95
96 add_pending_object(data->revs, obj, "");
97 }
98
99 static int add_recent_loose(const unsigned char *sha1,
100 const char *path, void *data)
101 {
102 struct stat st;
103 struct object *obj = lookup_object(sha1);
104
105 if (obj && obj->flags & SEEN)
106 return 0;
107
108 if (stat(path, &st) < 0) {
109 /*
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.
114 */
115 if (errno == ENOENT)
116 return 0;
117 return error("unable to stat %s: %s",
118 sha1_to_hex(sha1), strerror(errno));
119 }
120
121 add_recent_object(sha1, st.st_mtime, data);
122 return 0;
123 }
124
125 static int add_recent_packed(const unsigned char *sha1,
126 struct packed_git *p, uint32_t pos,
127 void *data)
128 {
129 struct object *obj = lookup_object(sha1);
130
131 if (obj && obj->flags & SEEN)
132 return 0;
133 add_recent_object(sha1, p->mtime, data);
134 return 0;
135 }
136
abcb865 @peff pack-objects: match prune logic for discarding objects
peff authored
137 int add_unseen_recent_objects_to_traversal(struct rev_info *revs,
138 unsigned long timestamp)
d3038d2 @peff prune: keep objects reachable from recent objects
peff authored
139 {
140 struct recent_data data;
141 int r;
142
143 data.revs = revs;
144 data.timestamp = timestamp;
145
1385bb7 @peff reachable: only mark local objects as recent
peff authored
146 r = for_each_loose_object(add_recent_loose, &data,
147 FOR_EACH_OBJECT_LOCAL_ONLY);
d3038d2 @peff prune: keep objects reachable from recent objects
peff authored
148 if (r)
149 return r;
1385bb7 @peff reachable: only mark local objects as recent
peff authored
150 return for_each_packed_object(add_recent_packed, &data,
151 FOR_EACH_OBJECT_LOCAL_ONLY);
d3038d2 @peff prune: keep objects reachable from recent objects
peff authored
152 }
153
dc34719 @pclouds prune: show progress while marking reachable objects
pclouds authored
154 void mark_reachable_objects(struct rev_info *revs, int mark_reflog,
d3038d2 @peff prune: keep objects reachable from recent objects
peff authored
155 unsigned long mark_recent,
dc34719 @pclouds prune: show progress while marking reachable objects
pclouds authored
156 struct progress *progress)
9442147 Move traversal of reachable objects into a separate library.
Junio C Hamano authored
157 {
0b26abc @peff reachable: per-object progress
peff authored
158 struct connectivity_progress cp;
159
9442147 Move traversal of reachable objects into a separate library.
Junio C Hamano authored
160 /*
161 * Set up revision parsing, and mark us as being interested
162 * in all object types, not just commits.
163 */
164 revs->tag_objects = 1;
165 revs->blob_objects = 1;
166 revs->tree_objects = 1;
167
168 /* Add all refs from the index file */
1be111d @peff reachable: use revision machinery's --indexed-objects code
peff authored
169 add_index_objects_to_pending(revs, 0);
9442147 Move traversal of reachable objects into a separate library.
Junio C Hamano authored
170
171 /* Add all external refs */
635170f @mhagger add_one_ref(): rewrite to take an object_id argument
mhagger authored
172 for_each_ref(add_one_ref, revs);
9442147 Move traversal of reachable objects into a separate library.
Junio C Hamano authored
173
c40fdd0 @max630 reachable.c: add HEAD to reachability starting commits
max630 authored
174 /* detached HEAD is not included in the list above */
635170f @mhagger add_one_ref(): rewrite to take an object_id argument
mhagger authored
175 head_ref(add_one_ref, revs);
c40fdd0 @max630 reachable.c: add HEAD to reachability starting commits
max630 authored
176
eb8381c scan reflogs independently from refs
Nicolas Pitre authored
177 /* Add all reflog info */
9442147 Move traversal of reachable objects into a separate library.
Junio C Hamano authored
178 if (mark_reflog)
718ccc9 @peff reachable: reuse revision.c "add all reflogs" code
peff authored
179 add_reflogs_to_pending(revs, 0);
9442147 Move traversal of reachable objects into a separate library.
Junio C Hamano authored
180
0b26abc @peff reachable: per-object progress
peff authored
181 cp.progress = progress;
182 cp.count = 0;
183
9442147 Move traversal of reachable objects into a separate library.
Junio C Hamano authored
184 /*
185 * Set up the revision walk - this will move all commits
186 * from the pending list to the commit walking list.
187 */
3d51e1b check return code of prepare_revision_walk
Martin Koegler authored
188 if (prepare_revision_walk(revs))
189 die("revision walk setup failed");
5f78a43 @peff reachable: use traverse_commit_list instead of custom walk
peff authored
190 traverse_commit_list(revs, mark_commit, mark_object, &cp);
d3038d2 @peff prune: keep objects reachable from recent objects
peff authored
191
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);
199 }
200
0b26abc @peff reachable: per-object progress
peff authored
201 display_progress(cp.progress, cp.count);
9442147 Move traversal of reachable objects into a separate library.
Junio C Hamano authored
202 }
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