1 files changed, 106 insertions, 0 deletions
diff --git a/builtin-gc.c b/builtin-gc.c
new file mode 100644
index 0000000..45025fb
--- /dev/null
+++ b/builtin-gc.c
@@ -0,0 +1,106 @@
+/*
+ * git gc builtin command
+ *
+ * Cleanup unreachable files and optimize the repository.
+ *
+ * Copyright (c) 2007 James Bowes
+ *
+ * Based on git-gc.sh, which is
+ *
+ * Copyright (c) 2006 Shawn O. Pearce
+ */
+
+#include "cache.h"
+#include "run-command.h"
+
+#define FAILED_RUN "failed to run %s"
+
+static const char builtin_gc_usage[] = "git-gc [--prune] [--aggressive]";
+
+static int pack_refs = 1;
+static int aggressive_window = -1;
+
+#define MAX_ADD 10
+static const char *argv_pack_refs[] = {"pack-refs", "--all", "--prune", NULL};
+static const char *argv_reflog[] = {"reflog", "expire", "--all", NULL};
+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 int gc_config(const char *var, const char *value)
+{
+	if (!strcmp(var, "gc.packrefs")) {
+		if (!strcmp(value, "notbare"))
+			pack_refs = -1;
+		else
+			pack_refs = git_config_bool(var, value);
+		return 0;
+	}
+	if (!strcmp(var, "gc.aggressivewindow")) {
+		aggressive_window = git_config_int(var, value);
+		return 0;
+	}
+	return git_default_config(var, value);
+}
+
+static void append_option(const char **cmd, const char *opt, int max_length)
+{
+	int i;
+
+	for (i = 0; cmd[i]; i++)
+		;
+
+	if (i + 2 >= max_length)
+		die("Too many options specified");
+	cmd[i++] = opt;
+	cmd[i] = NULL;
+}
+
+int cmd_gc(int argc, const char **argv, const char *prefix)
+{
+	int i;
+	int prune = 0;
+	char buf[80];
+
+	git_config(gc_config);
+
+	if (pack_refs < 0)
+		pack_refs = !is_bare_repository();
+
+	for (i = 1; i < argc; i++) {
+		const char *arg = argv[i];
+		if (!strcmp(arg, "--prune")) {
+			prune = 1;
+			continue;
+		}
+		if (!strcmp(arg, "--aggressive")) {
+			append_option(argv_repack, "-f", MAX_ADD);
+			if (aggressive_window > 0) {
+				sprintf(buf, "--window=%d", aggressive_window);
+				append_option(argv_repack, buf, MAX_ADD);
+			}
+			continue;
+		}
+		/* perhaps other parameters later... */
+		break;
+	}
+	if (i != argc)
+		usage(builtin_gc_usage);
+
+	if (pack_refs && run_command_v_opt(argv_pack_refs, RUN_GIT_CMD))
+		return error(FAILED_RUN, argv_pack_refs[0]);
+
+	if (run_command_v_opt(argv_reflog, RUN_GIT_CMD))
+		return error(FAILED_RUN, argv_reflog[0]);
+
+	if (run_command_v_opt(argv_repack, RUN_GIT_CMD))
+		return error(FAILED_RUN, argv_repack[0]);
+
+	if (prune && run_command_v_opt(argv_prune, RUN_GIT_CMD))
+		return error(FAILED_RUN, argv_prune[0]);
+
+	if (run_command_v_opt(argv_rerere, RUN_GIT_CMD))
+		return error(FAILED_RUN, argv_rerere[0]);
+
+	return 0;
+}