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