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 "cache.h"
  14 #include "run-command.h"
  15
  16 #define FAILED_RUN "failed to run %s"
  17
  18 static const char builtin_gc_usage[] = "git-gc [--prune]";
  19
  20 static int pack_refs = -1;
  21
  22 static const char *argv_pack_refs[] = {"pack-refs", "--prune", NULL};
  23 static const char *argv_reflog[] = {"reflog", "expire", "--all", NULL};
  24 static const char *argv_repack[] = {"repack", "-a", "-d", "-l", NULL};
  25 static const char *argv_prune[] = {"prune", NULL};
  26 static const char *argv_rerere[] = {"rerere", "gc", NULL};
  27
  28 static int gc_config(const char *var, const char *value)
  29 {
  30         if (!strcmp(var, "gc.packrefs")) {
  31                 if (!strcmp(value, "notbare"))
  32                         pack_refs = -1;
  33                 else
  34                         pack_refs = git_config_bool(var, value);
  35                 return 0;
  36         }
  37         return git_default_config(var, value);
  38 }
  39
  40 int cmd_gc(int argc, const char **argv, const char *prefix)
  41 {
  42         int i;
  43         int prune = 0;
  44
  45         git_config(gc_config);
  46
  47         if (pack_refs < 0)
  48                 pack_refs = !is_bare_repository();
  49
  50         for (i = 1; i < argc; i++) {
  51                 const char *arg = argv[i];
  52                 if (!strcmp(arg, "--prune")) {
  53                         prune = 1;
  54                         continue;
  55                 }
  56                 /* perhaps other parameters later... */
  57                 break;
  58         }
  59         if (i != argc)
  60                 usage(builtin_gc_usage);
  61
  62         if (pack_refs && run_command_v_opt(argv_pack_refs, RUN_GIT_CMD))
  63                 return error(FAILED_RUN, argv_pack_refs[0]);
  64
  65         if (run_command_v_opt(argv_reflog, RUN_GIT_CMD))
  66                 return error(FAILED_RUN, argv_reflog[0]);
  67
  68         if (run_command_v_opt(argv_repack, RUN_GIT_CMD))
  69                 return error(FAILED_RUN, argv_repack[0]);
  70
  71         if (prune && run_command_v_opt(argv_prune, RUN_GIT_CMD))
  72                 return error(FAILED_RUN, argv_prune[0]);
  73
  74         if (run_command_v_opt(argv_rerere, RUN_GIT_CMD))
  75                 return error(FAILED_RUN, argv_rerere[0]);
  76
  77         return 0;
  78 }