builtin/pack-objects.c: respect 'pack.writeReverseIndex'
[git] / builtin / prune.c
1 #include "cache.h"
2 #include "commit.h"
3 #include "diff.h"
4 #include "revision.h"
5 #include "builtin.h"
6 #include "reachable.h"
7 #include "parse-options.h"
8 #include "progress.h"
9 #include "prune-packed.h"
10 #include "object-store.h"
11 #include "shallow.h"
12
13 static const char * const prune_usage[] = {
14         N_("git prune [-n] [-v] [--progress] [--expire <time>] [--] [<head>...]"),
15         NULL
16 };
17 static int show_only;
18 static int verbose;
19 static timestamp_t expire;
20 static int show_progress = -1;
21
22 static int prune_tmp_file(const char *fullpath)
23 {
24         struct stat st;
25         if (lstat(fullpath, &st))
26                 return error("Could not stat '%s'", fullpath);
27         if (st.st_mtime > expire)
28                 return 0;
29         if (show_only || verbose)
30                 printf("Removing stale temporary file %s\n", fullpath);
31         if (!show_only)
32                 unlink_or_warn(fullpath);
33         return 0;
34 }
35
36 static void perform_reachability_traversal(struct rev_info *revs)
37 {
38         static int initialized;
39         struct progress *progress = NULL;
40
41         if (initialized)
42                 return;
43
44         if (show_progress)
45                 progress = start_delayed_progress(_("Checking connectivity"), 0);
46         mark_reachable_objects(revs, 1, expire, progress);
47         stop_progress(&progress);
48         initialized = 1;
49 }
50
51 static int is_object_reachable(const struct object_id *oid,
52                                struct rev_info *revs)
53 {
54         struct object *obj;
55
56         perform_reachability_traversal(revs);
57
58         obj = lookup_object(the_repository, oid);
59         return obj && (obj->flags & SEEN);
60 }
61
62 static int prune_object(const struct object_id *oid, const char *fullpath,
63                         void *data)
64 {
65         struct rev_info *revs = data;
66         struct stat st;
67
68         if (is_object_reachable(oid, revs))
69                 return 0;
70
71         if (lstat(fullpath, &st)) {
72                 /* report errors, but do not stop pruning */
73                 error("Could not stat '%s'", fullpath);
74                 return 0;
75         }
76         if (st.st_mtime > expire)
77                 return 0;
78         if (show_only || verbose) {
79                 enum object_type type = oid_object_info(the_repository, oid,
80                                                         NULL);
81                 printf("%s %s\n", oid_to_hex(oid),
82                        (type > 0) ? type_name(type) : "unknown");
83         }
84         if (!show_only)
85                 unlink_or_warn(fullpath);
86         return 0;
87 }
88
89 static int prune_cruft(const char *basename, const char *path, void *data)
90 {
91         if (starts_with(basename, "tmp_obj_"))
92                 prune_tmp_file(path);
93         else
94                 fprintf(stderr, "bad sha1 file: %s\n", path);
95         return 0;
96 }
97
98 static int prune_subdir(unsigned int nr, const char *path, void *data)
99 {
100         if (!show_only)
101                 rmdir(path);
102         return 0;
103 }
104
105 /*
106  * Write errors (particularly out of space) can result in
107  * failed temporary packs (and more rarely indexes and other
108  * files beginning with "tmp_") accumulating in the object
109  * and the pack directories.
110  */
111 static void remove_temporary_files(const char *path)
112 {
113         DIR *dir;
114         struct dirent *de;
115
116         dir = opendir(path);
117         if (!dir) {
118                 fprintf(stderr, "Unable to open directory %s\n", path);
119                 return;
120         }
121         while ((de = readdir(dir)) != NULL)
122                 if (starts_with(de->d_name, "tmp_"))
123                         prune_tmp_file(mkpath("%s/%s", path, de->d_name));
124         closedir(dir);
125 }
126
127 int cmd_prune(int argc, const char **argv, const char *prefix)
128 {
129         struct rev_info revs;
130         int exclude_promisor_objects = 0;
131         const struct option options[] = {
132                 OPT__DRY_RUN(&show_only, N_("do not remove, show only")),
133                 OPT__VERBOSE(&verbose, N_("report pruned objects")),
134                 OPT_BOOL(0, "progress", &show_progress, N_("show progress")),
135                 OPT_EXPIRY_DATE(0, "expire", &expire,
136                                 N_("expire objects older than <time>")),
137                 OPT_BOOL(0, "exclude-promisor-objects", &exclude_promisor_objects,
138                          N_("limit traversal to objects outside promisor packfiles")),
139                 OPT_END()
140         };
141         char *s;
142
143         expire = TIME_MAX;
144         save_commit_buffer = 0;
145         read_replace_refs = 0;
146         ref_paranoia = 1;
147         repo_init_revisions(the_repository, &revs, prefix);
148
149         argc = parse_options(argc, argv, prefix, options, prune_usage, 0);
150
151         if (repository_format_precious_objects)
152                 die(_("cannot prune in a precious-objects repo"));
153
154         while (argc--) {
155                 struct object_id oid;
156                 const char *name = *argv++;
157
158                 if (!get_oid(name, &oid)) {
159                         struct object *object = parse_object_or_die(&oid,
160                                                                     name);
161                         add_pending_object(&revs, object, "");
162                 }
163                 else
164                         die("unrecognized argument: %s", name);
165         }
166
167         if (show_progress == -1)
168                 show_progress = isatty(2);
169         if (exclude_promisor_objects) {
170                 fetch_if_missing = 0;
171                 revs.exclude_promisor_objects = 1;
172         }
173
174         for_each_loose_file_in_objdir(get_object_directory(), prune_object,
175                                       prune_cruft, prune_subdir, &revs);
176
177         prune_packed_objects(show_only ? PRUNE_PACKED_DRY_RUN : 0);
178         remove_temporary_files(get_object_directory());
179         s = mkpathdup("%s/pack", get_object_directory());
180         remove_temporary_files(s);
181         free(s);
182
183         if (is_repository_shallow(the_repository)) {
184                 perform_reachability_traversal(&revs);
185                 prune_shallow(show_only ? PRUNE_SHOW_ONLY : 0);
186         }
187
188         return 0;
189 }