diff options
| -rw-r--r-- | builtin-gc.c | 64 |
1 files changed, 63 insertions, 1 deletions
diff --git a/builtin-gc.c b/builtin-gc.c index 9397482610..093b3dda9f 100644 --- a/builtin-gc.c +++ b/builtin-gc.c @@ -20,6 +20,7 @@ static const char builtin_gc_usage[] = "git-gc [--prune] [--aggressive]"; static int pack_refs = 1; static int aggressive_window = -1; +static int gc_auto_threshold = 6700; #define MAX_ADD 10 static const char *argv_pack_refs[] = {"pack-refs", "--all", "--prune", NULL}; @@ -28,6 +29,8 @@ static const char *argv_repack[MAX_ADD] = {"repack", "-a", "-d", "-l", NULL}; static const char *argv_prune[] = {"prune", NULL}; static const char *argv_rerere[] = {"rerere", "gc", NULL}; +static const char *argv_repack_auto[] = {"repack", "-d", "-l", NULL}; + static int gc_config(const char *var, const char *value) { if (!strcmp(var, "gc.packrefs")) { @@ -41,6 +44,10 @@ static int gc_config(const char *var, const char *value) aggressive_window = git_config_int(var, value); return 0; } + if (!strcmp(var, "gc.auto")) { + gc_auto_threshold = git_config_int(var, value); + return 0; + } return git_default_config(var, value); } @@ -57,10 +64,49 @@ static void append_option(const char **cmd, const char *opt, int max_length) cmd[i] = NULL; } +static int need_to_gc(void) +{ + /* + * Quickly check if a "gc" is needed, by estimating how + * many loose objects there are. Because SHA-1 is evenly + * distributed, we can check only one and get a reasonable + * estimate. + */ + char path[PATH_MAX]; + const char *objdir = get_object_directory(); + DIR *dir; + struct dirent *ent; + int auto_threshold; + int num_loose = 0; + int needed = 0; + + if (sizeof(path) <= snprintf(path, sizeof(path), "%s/17", objdir)) { + warning("insanely long object directory %.*s", 50, objdir); + return 0; + } + dir = opendir(path); + if (!dir) + return 0; + + auto_threshold = (gc_auto_threshold + 255) / 256; + while ((ent = readdir(dir)) != NULL) { + if (strspn(ent->d_name, "0123456789abcdef") != 38 || + ent->d_name[38] != '\0') + continue; + if (++num_loose > auto_threshold) { + needed = 1; + break; + } + } + closedir(dir); + return needed; +} + int cmd_gc(int argc, const char **argv, const char *prefix) { int i; int prune = 0; + int auto_gc = 0; char buf[80]; git_config(gc_config); @@ -82,12 +128,28 @@ int cmd_gc(int argc, const char **argv, const char *prefix) } continue; } - /* perhaps other parameters later... */ + if (!strcmp(arg, "--auto")) { + if (gc_auto_threshold <= 0) + return 0; + auto_gc = 1; + continue; + } break; } if (i != argc) usage(builtin_gc_usage); + if (auto_gc) { + /* + * Auto-gc should be least intrusive as possible. + */ + prune = 0; + for (i = 0; i < ARRAY_SIZE(argv_repack_auto); i++) + argv_repack[i] = argv_repack_auto[i]; + if (!need_to_gc()) + return 0; + } + if (pack_refs && run_command_v_opt(argv_pack_refs, RUN_GIT_CMD)) return error(FAILED_RUN, argv_pack_refs[0]); |