prune: factor out loose-object directory traversal
[git/git.git] / reachable.c
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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"
dc347195 10#include "progress.h"
5f78a431 11#include "list-objects.h"
94421474 12
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13struct connectivity_progress {
14 struct progress *progress;
15 unsigned long count;
16};
17
18static 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
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25static int add_one_ref(const char *path, const unsigned char *sha1, int flag, void *cb_data)
26{
f7892d18 27 struct object *object = parse_object_or_die(sha1, path);
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28 struct rev_info *revs = (struct rev_info *)cb_data;
29
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30 add_pending_object(revs, object, "");
31
32 return 0;
33}
34
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35static void add_one_tree(const unsigned char *sha1, struct rev_info *revs)
36{
37 struct tree *tree = lookup_tree(sha1);
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38 if (tree)
39 add_pending_object(revs, &tree->object, "");
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40}
41
42static void add_cache_tree(struct cache_tree *it, struct rev_info *revs)
43{
44 int i;
45
46 if (it->entry_count >= 0)
47 add_one_tree(it->sha1, revs);
48 for (i = 0; i < it->subtree_nr; i++)
49 add_cache_tree(it->down[i]->cache_tree, revs);
50}
51
52static void add_cache_refs(struct rev_info *revs)
53{
54 int i;
55
56 read_cache();
57 for (i = 0; i < active_nr; i++) {
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58 /*
59 * The index can contain blobs and GITLINKs, GITLINKs are hashes
60 * that don't actually point to objects in the repository, it's
61 * almost guaranteed that they are NOT blobs, so we don't call
62 * lookup_blob() on them, to avoid populating the hash table
63 * with invalid information
64 */
7a51ed66 65 if (S_ISGITLINK(active_cache[i]->ce_mode))
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66 continue;
67
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68 lookup_blob(active_cache[i]->sha1);
69 /*
70 * We could add the blobs to the pending list, but quite
71 * frankly, we don't care. Once we've looked them up, and
72 * added them as objects, we've really done everything
73 * there is to do for a blob
74 */
75 }
76 if (active_cache_tree)
77 add_cache_tree(active_cache_tree, revs);
78}
79
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80/*
81 * The traversal will have already marked us as SEEN, so we
82 * only need to handle any progress reporting here.
83 */
84static void mark_object(struct object *obj, const struct name_path *path,
85 const char *name, void *data)
86{
87 update_progress(data);
88}
89
90static void mark_commit(struct commit *c, void *data)
91{
92 mark_object(&c->object, NULL, NULL, data);
93}
94
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95void mark_reachable_objects(struct rev_info *revs, int mark_reflog,
96 struct progress *progress)
94421474 97{
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98 struct connectivity_progress cp;
99
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100 /*
101 * Set up revision parsing, and mark us as being interested
102 * in all object types, not just commits.
103 */
104 revs->tag_objects = 1;
105 revs->blob_objects = 1;
106 revs->tree_objects = 1;
107
108 /* Add all refs from the index file */
109 add_cache_refs(revs);
110
111 /* Add all external refs */
112 for_each_ref(add_one_ref, revs);
113
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114 /* detached HEAD is not included in the list above */
115 head_ref(add_one_ref, revs);
116
eb8381c8 117 /* Add all reflog info */
94421474 118 if (mark_reflog)
718ccc97 119 add_reflogs_to_pending(revs, 0);
94421474 120
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121 cp.progress = progress;
122 cp.count = 0;
123
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124 /*
125 * Set up the revision walk - this will move all commits
126 * from the pending list to the commit walking list.
127 */
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128 if (prepare_revision_walk(revs))
129 die("revision walk setup failed");
5f78a431 130 traverse_commit_list(revs, mark_commit, mark_object, &cp);
0b26abc0 131 display_progress(cp.progress, cp.count);
94421474 132}