Andrew's git - gitweb.git/blob

   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
  19static const char builtin_gc_usage[] = "git-gc [--prune] [--aggressive]";
  20
  21static int pack_refs = 1;
  22static int aggressive_window = -1;
  23
  24#define MAX_ADD 10
  25static const char *argv_pack_refs[] = {"pack-refs", "--all", "--prune", NULL};
  26static const char *argv_reflog[] = {"reflog", "expire", "--all", NULL};
  27static const char *argv_repack[MAX_ADD] = {"repack", "-a", "-d", "-l", NULL};
  28static const char *argv_prune[] = {"prune", NULL};
  29static const char *argv_rerere[] = {"rerere", "gc", NULL};
  30
  31static 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
  47static 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
  60int 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}