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