Merge branch 'jk/async-pkt-line'
[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] [--expire <time>] [--] [<head>...]"),
12         NULL
13 };
14 static int show_only;
15 static int verbose;
16 static unsigned long 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 unsigned char *sha1, 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(sha1))
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 = sha1_object_info(sha1, NULL);
54                 printf("%s %s\n", sha1_to_hex(sha1),
55                        (type > 0) ? typename(type) : "unknown");
56         }
57         if (!show_only)
58                 unlink_or_warn(fullpath);
59         return 0;
60 }
61
62 static int prune_cruft(const char *basename, const char *path, void *data)
63 {
64         if (starts_with(basename, "tmp_obj_"))
65                 prune_tmp_file(path);
66         else
67                 fprintf(stderr, "bad sha1 file: %s\n", path);
68         return 0;
69 }
70
71 static int prune_subdir(int nr, const char *path, void *data)
72 {
73         if (!show_only)
74                 rmdir(path);
75         return 0;
76 }
77
78 /*
79  * Write errors (particularly out of space) can result in
80  * failed temporary packs (and more rarely indexes and other
81  * files beginning with "tmp_") accumulating in the object
82  * and the pack directories.
83  */
84 static void remove_temporary_files(const char *path)
85 {
86         DIR *dir;
87         struct dirent *de;
88
89         dir = opendir(path);
90         if (!dir) {
91                 fprintf(stderr, "Unable to open directory %s\n", path);
92                 return;
93         }
94         while ((de = readdir(dir)) != NULL)
95                 if (starts_with(de->d_name, "tmp_"))
96                         prune_tmp_file(mkpath("%s/%s", path, de->d_name));
97         closedir(dir);
98 }
99
100 int cmd_prune(int argc, const char **argv, const char *prefix)
101 {
102         struct rev_info revs;
103         struct progress *progress = NULL;
104         const struct option options[] = {
105                 OPT__DRY_RUN(&show_only, N_("do not remove, show only")),
106                 OPT__VERBOSE(&verbose, N_("report pruned objects")),
107                 OPT_BOOL(0, "progress", &show_progress, N_("show progress")),
108                 OPT_EXPIRY_DATE(0, "expire", &expire,
109                                 N_("expire objects older than <time>")),
110                 OPT_END()
111         };
112         char *s;
113
114         expire = ULONG_MAX;
115         save_commit_buffer = 0;
116         check_replace_refs = 0;
117         ref_paranoia = 1;
118         init_revisions(&revs, prefix);
119
120         argc = parse_options(argc, argv, prefix, options, prune_usage, 0);
121
122         while (argc--) {
123                 unsigned char sha1[20];
124                 const char *name = *argv++;
125
126                 if (!get_sha1(name, sha1)) {
127                         struct object *object = parse_object_or_die(sha1, name);
128                         add_pending_object(&revs, object, "");
129                 }
130                 else
131                         die("unrecognized argument: %s", name);
132         }
133
134         if (show_progress == -1)
135                 show_progress = isatty(2);
136         if (show_progress)
137                 progress = start_progress_delay(_("Checking connectivity"), 0, 0, 2);
138
139         mark_reachable_objects(&revs, 1, expire, progress);
140         stop_progress(&progress);
141         for_each_loose_file_in_objdir(get_object_directory(), prune_object,
142                                       prune_cruft, prune_subdir, NULL);
143
144         prune_packed_objects(show_only ? PRUNE_PACKED_DRY_RUN : 0);
145         remove_temporary_files(get_object_directory());
146         s = mkpathdup("%s/pack", get_object_directory());
147         remove_temporary_files(s);
148         free(s);
149
150         if (is_repository_shallow())
151                 prune_shallow(show_only);
152
153         return 0;
154 }