Hopefully the final update to draft release notes for 1.5.3.
[git] / builtin-gc.c
1 /*
2  * git gc builtin command
3  *
4  * Cleanup unreachable files and optimize the repository.
5  *
6  * Copyright (c) 2007 James Bowes
7  *
8  * Based on git-gc.sh, which is
9  *
10  * Copyright (c) 2006 Shawn O. Pearce
11  */
12
13 #include "builtin.h"
14 #include "cache.h"
15 #include "run-command.h"
16
17 #define FAILED_RUN "failed to run %s"
18
19 static const char builtin_gc_usage[] = "git-gc [--prune] [--aggressive]";
20
21 static int pack_refs = 1;
22 static int aggressive_window = -1;
23
24 #define MAX_ADD 10
25 static const char *argv_pack_refs[] = {"pack-refs", "--all", "--prune", NULL};
26 static const char *argv_reflog[] = {"reflog", "expire", "--all", NULL};
27 static const char *argv_repack[MAX_ADD] = {"repack", "-a", "-d", "-l", NULL};
28 static const char *argv_prune[] = {"prune", NULL};
29 static const char *argv_rerere[] = {"rerere", "gc", NULL};
30
31 static int gc_config(const char *var, const char *value)
32 {
33         if (!strcmp(var, "gc.packrefs")) {
34                 if (!strcmp(value, "notbare"))
35                         pack_refs = -1;
36                 else
37                         pack_refs = git_config_bool(var, value);
38                 return 0;
39         }
40         if (!strcmp(var, "gc.aggressivewindow")) {
41                 aggressive_window = git_config_int(var, value);
42                 return 0;
43         }
44         return git_default_config(var, value);
45 }
46
47 static void append_option(const char **cmd, const char *opt, int max_length)
48 {
49         int i;
50
51         for (i = 0; cmd[i]; i++)
52                 ;
53
54         if (i + 2 >= max_length)
55                 die("Too many options specified");
56         cmd[i++] = opt;
57         cmd[i] = NULL;
58 }
59
60 int cmd_gc(int argc, const char **argv, const char *prefix)
61 {
62         int i;
63         int prune = 0;
64         char buf[80];
65
66         git_config(gc_config);
67
68         if (pack_refs < 0)
69                 pack_refs = !is_bare_repository();
70
71         for (i = 1; i < argc; i++) {
72                 const char *arg = argv[i];
73                 if (!strcmp(arg, "--prune")) {
74                         prune = 1;
75                         continue;
76                 }
77                 if (!strcmp(arg, "--aggressive")) {
78                         append_option(argv_repack, "-f", MAX_ADD);
79                         if (aggressive_window > 0) {
80                                 sprintf(buf, "--window=%d", aggressive_window);
81                                 append_option(argv_repack, buf, MAX_ADD);
82                         }
83                         continue;
84                 }
85                 /* perhaps other parameters later... */
86                 break;
87         }
88         if (i != argc)
89                 usage(builtin_gc_usage);
90
91         if (pack_refs && run_command_v_opt(argv_pack_refs, RUN_GIT_CMD))
92                 return error(FAILED_RUN, argv_pack_refs[0]);
93
94         if (run_command_v_opt(argv_reflog, RUN_GIT_CMD))
95                 return error(FAILED_RUN, argv_reflog[0]);
96
97         if (run_command_v_opt(argv_repack, RUN_GIT_CMD))
98                 return error(FAILED_RUN, argv_repack[0]);
99
100         if (prune && run_command_v_opt(argv_prune, RUN_GIT_CMD))
101                 return error(FAILED_RUN, argv_prune[0]);
102
103         if (run_command_v_opt(argv_rerere, RUN_GIT_CMD))
104                 return error(FAILED_RUN, argv_rerere[0]);
105
106         return 0;
107 }