Git 1.9.0
[git/git.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_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 char *fullpath, const unsigned char *sha1)
35 {
36 struct stat st;
37 if (lstat(fullpath, &st))
38 return error("Could not stat '%s'", fullpath);
39 if (st.st_mtime > expire)
40 return 0;
41 if (show_only || verbose) {
42 enum object_type type = sha1_object_info(sha1, NULL);
43 printf("%s %s\n", sha1_to_hex(sha1),
44 (type > 0) ? typename(type) : "unknown");
45 }
46 if (!show_only)
47 unlink_or_warn(fullpath);
48 return 0;
49 }
50
51 static int prune_dir(int i, struct strbuf *path)
52 {
53 size_t baselen = path->len;
54 DIR *dir = opendir(path->buf);
55 struct dirent *de;
56
57 if (!dir)
58 return 0;
59
60 while ((de = readdir(dir)) != NULL) {
61 char name[100];
62 unsigned char sha1[20];
63
64 if (is_dot_or_dotdot(de->d_name))
65 continue;
66 if (strlen(de->d_name) == 38) {
67 sprintf(name, "%02x", i);
68 memcpy(name+2, de->d_name, 39);
69 if (get_sha1_hex(name, sha1) < 0)
70 break;
71
72 /*
73 * Do we know about this object?
74 * It must have been reachable
75 */
76 if (lookup_object(sha1))
77 continue;
78
79 strbuf_addf(path, "/%s", de->d_name);
80 prune_object(path->buf, sha1);
81 strbuf_setlen(path, baselen);
82 continue;
83 }
84 if (starts_with(de->d_name, "tmp_obj_")) {
85 strbuf_addf(path, "/%s", de->d_name);
86 prune_tmp_file(path->buf);
87 strbuf_setlen(path, baselen);
88 continue;
89 }
90 fprintf(stderr, "bad sha1 file: %s/%s\n", path->buf, de->d_name);
91 }
92 closedir(dir);
93 if (!show_only)
94 rmdir(path->buf);
95 return 0;
96 }
97
98 static void prune_object_dir(const char *path)
99 {
100 struct strbuf buf = STRBUF_INIT;
101 size_t baselen;
102 int i;
103
104 strbuf_addstr(&buf, path);
105 strbuf_addch(&buf, '/');
106 baselen = buf.len;
107
108 for (i = 0; i < 256; i++) {
109 strbuf_addf(&buf, "%02x", i);
110 prune_dir(i, &buf);
111 strbuf_setlen(&buf, baselen);
112 }
113 }
114
115 /*
116 * Write errors (particularly out of space) can result in
117 * failed temporary packs (and more rarely indexes and other
118 * files beginning with "tmp_") accumulating in the object
119 * and the pack directories.
120 */
121 static void remove_temporary_files(const char *path)
122 {
123 DIR *dir;
124 struct dirent *de;
125
126 dir = opendir(path);
127 if (!dir) {
128 fprintf(stderr, "Unable to open directory %s\n", path);
129 return;
130 }
131 while ((de = readdir(dir)) != NULL)
132 if (starts_with(de->d_name, "tmp_"))
133 prune_tmp_file(mkpath("%s/%s", path, de->d_name));
134 closedir(dir);
135 }
136
137 int cmd_prune(int argc, const char **argv, const char *prefix)
138 {
139 struct rev_info revs;
140 struct progress *progress = NULL;
141 const struct option options[] = {
142 OPT__DRY_RUN(&show_only, N_("do not remove, show only")),
143 OPT__VERBOSE(&verbose, N_("report pruned objects")),
144 OPT_BOOL(0, "progress", &show_progress, N_("show progress")),
145 OPT_EXPIRY_DATE(0, "expire", &expire,
146 N_("expire objects older than <time>")),
147 OPT_END()
148 };
149 char *s;
150
151 expire = ULONG_MAX;
152 save_commit_buffer = 0;
153 read_replace_refs = 0;
154 init_revisions(&revs, prefix);
155
156 argc = parse_options(argc, argv, prefix, options, prune_usage, 0);
157 while (argc--) {
158 unsigned char sha1[20];
159 const char *name = *argv++;
160
161 if (!get_sha1(name, sha1)) {
162 struct object *object = parse_object_or_die(sha1, name);
163 add_pending_object(&revs, object, "");
164 }
165 else
166 die("unrecognized argument: %s", name);
167 }
168
169 if (show_progress == -1)
170 show_progress = isatty(2);
171 if (show_progress)
172 progress = start_progress_delay("Checking connectivity", 0, 0, 2);
173
174 mark_reachable_objects(&revs, 1, progress);
175 stop_progress(&progress);
176 prune_object_dir(get_object_directory());
177
178 prune_packed_objects(show_only ? PRUNE_PACKED_DRY_RUN : 0);
179 remove_temporary_files(get_object_directory());
180 s = mkpathdup("%s/pack", get_object_directory());
181 remove_temporary_files(s);
182 free(s);
183
184 if (is_repository_shallow())
185 prune_shallow(show_only);
186
187 return 0;
188 }