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