Merge branch 'tj/maint-doc-commit-sign' into maint
[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 "dir.h"
10
11 static const char * const prune_usage[] = {
12         N_("git prune [-n] [-v] [--expire <time>] [--] [<head>...]"),
13         NULL
14 };
15 static int show_only;
16 static int verbose;
17 static unsigned long expire;
18 static int show_progress = -1;
19
20 static int prune_tmp_object(const char *path, const char *filename)
21 {
22         const char *fullpath = mkpath("%s/%s", path, filename);
23         struct stat st;
24         if (lstat(fullpath, &st))
25                 return error("Could not stat '%s'", fullpath);
26         if (st.st_mtime > expire)
27                 return 0;
28         if (show_only || verbose)
29                 printf("Removing stale temporary file %s\n", fullpath);
30         if (!show_only)
31                 unlink_or_warn(fullpath);
32         return 0;
33 }
34
35 static int prune_object(char *path, const char *filename, const unsigned char *sha1)
36 {
37         const char *fullpath = mkpath("%s/%s", path, filename);
38         struct stat st;
39         if (lstat(fullpath, &st))
40                 return error("Could not stat '%s'", fullpath);
41         if (st.st_mtime > expire)
42                 return 0;
43         if (show_only || verbose) {
44                 enum object_type type = sha1_object_info(sha1, NULL);
45                 printf("%s %s\n", sha1_to_hex(sha1),
46                        (type > 0) ? typename(type) : "unknown");
47         }
48         if (!show_only)
49                 unlink_or_warn(fullpath);
50         return 0;
51 }
52
53 static int prune_dir(int i, char *path)
54 {
55         DIR *dir = opendir(path);
56         struct dirent *de;
57
58         if (!dir)
59                 return 0;
60
61         while ((de = readdir(dir)) != NULL) {
62                 char name[100];
63                 unsigned char sha1[20];
64
65                 if (is_dot_or_dotdot(de->d_name))
66                         continue;
67                 if (strlen(de->d_name) == 38) {
68                         sprintf(name, "%02x", i);
69                         memcpy(name+2, de->d_name, 39);
70                         if (get_sha1_hex(name, sha1) < 0)
71                                 break;
72
73                         /*
74                          * Do we know about this object?
75                          * It must have been reachable
76                          */
77                         if (lookup_object(sha1))
78                                 continue;
79
80                         prune_object(path, de->d_name, sha1);
81                         continue;
82                 }
83                 if (!prefixcmp(de->d_name, "tmp_obj_")) {
84                         prune_tmp_object(path, de->d_name);
85                         continue;
86                 }
87                 fprintf(stderr, "bad sha1 file: %s/%s\n", path, de->d_name);
88         }
89         closedir(dir);
90         if (!show_only)
91                 rmdir(path);
92         return 0;
93 }
94
95 static void prune_object_dir(const char *path)
96 {
97         int i;
98         for (i = 0; i < 256; i++) {
99                 static char dir[4096];
100                 sprintf(dir, "%s/%02x", path, i);
101                 prune_dir(i, dir);
102         }
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 (!prefixcmp(de->d_name, "tmp_"))
123                         prune_tmp_object(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         struct progress *progress = NULL;
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_DATE(0, "expire", &expire,
136                          N_("expire objects older than <time>")),
137                 OPT_END()
138         };
139         char *s;
140
141         expire = ULONG_MAX;
142         save_commit_buffer = 0;
143         read_replace_refs = 0;
144         init_revisions(&revs, prefix);
145
146         argc = parse_options(argc, argv, prefix, options, prune_usage, 0);
147         while (argc--) {
148                 unsigned char sha1[20];
149                 const char *name = *argv++;
150
151                 if (!get_sha1(name, sha1)) {
152                         struct object *object = parse_object(sha1);
153                         if (!object)
154                                 die("bad object: %s", name);
155                         add_pending_object(&revs, object, "");
156                 }
157                 else
158                         die("unrecognized argument: %s", name);
159         }
160
161         if (show_progress == -1)
162                 show_progress = isatty(2);
163         if (show_progress)
164                 progress = start_progress_delay("Checking connectivity", 0, 0, 2);
165
166         mark_reachable_objects(&revs, 1, progress);
167         stop_progress(&progress);
168         prune_object_dir(get_object_directory());
169
170         prune_packed_objects(show_only);
171         remove_temporary_files(get_object_directory());
172         s = mkpathdup("%s/pack", get_object_directory());
173         remove_temporary_files(s);
174         free(s);
175         return 0;
176 }