1 files changed, 37 insertions, 16 deletions

diff --git a/builtin-gc.c b/builtin-gc.c
index 8cef36f6a4..f5625bb9fb 100644
--- a/builtin-gc.c
+++ b/builtin-gc.c
@@ -35,7 +35,7 @@ static const char *argv_repack[MAX_ADD] = {"repack", "-d", "-l", NULL};
 static const char *argv_prune[] = {"prune", "--expire", NULL, NULL};
 static const char *argv_rerere[] = {"rerere", "gc", NULL};
 
-static int gc_config(const char *var, const char *value)
+static int gc_config(const char *var, const char *value, void *cb)
 {
 	if (!strcmp(var, "gc.packrefs")) {
 		if (value && !strcmp(value, "notbare"))
@@ -67,7 +67,7 @@ static int gc_config(const char *var, const char *value)
 		prune_expire = xstrdup(value);
 		return 0;
 	}
-	return git_default_config(var, value);
+	return git_default_config(var, value, cb);
 }
 
 static void append_option(const char **cmd, const char *opt, int max_length)
@@ -157,6 +157,34 @@ static int too_many_packs(void)
 	return gc_auto_pack_limit <= cnt;
 }
 
+static int run_hook(void)
+{
+	const char *argv[2];
+	struct child_process hook;
+	int ret;
+
+	argv[0] = git_path("hooks/pre-auto-gc");
+	argv[1] = NULL;
+
+	if (access(argv[0], X_OK) < 0)
+		return 0;
+
+	memset(&hook, 0, sizeof(hook));
+	hook.argv = argv;
+	hook.no_stdin = 1;
+	hook.stdout_to_stderr = 1;
+
+	ret = start_command(&hook);
+	if (ret) {
+		warning("Could not spawn %s", argv[0]);
+		return ret;
+	}
+	ret = finish_command(&hook);
+	if (ret == -ERR_RUN_COMMAND_WAITPID_SIGNAL)
+		warning("%s exited due to uncaught signal", argv[0]);
+	return ret;
+}
+
 static int need_to_gc(void)
 {
 	/*
@@ -176,6 +204,9 @@ static int need_to_gc(void)
 		append_option(argv_repack, "-A", MAX_ADD);
 	else if (!too_many_loose_objects())
 		return 0;
+
+	if (run_hook())
+		return 0;
 	return 1;
 }
 
@@ -188,14 +219,14 @@ int cmd_gc(int argc, const char **argv, const char *prefix)
 	char buf[80];
 
 	struct option builtin_gc_options[] = {
-		OPT_BOOLEAN(0, "prune", &prune, "prune unreferenced objects"),
+		OPT_BOOLEAN(0, "prune", &prune, "prune unreferenced objects (deprecated)"),
 		OPT_BOOLEAN(0, "aggressive", &aggressive, "be more thorough (increased runtime)"),
 		OPT_BOOLEAN(0, "auto", &auto_gc, "enable auto-gc mode"),
 		OPT_BOOLEAN('q', "quiet", &quiet, "suppress progress reports"),
 		OPT_END()
 	};
 
-	git_config(gc_config);
+	git_config(gc_config, NULL);
 
 	if (pack_refs < 0)
 		pack_refs = !is_bare_repository();
@@ -218,24 +249,14 @@ int cmd_gc(int argc, const char **argv, const char *prefix)
 		/*
 		 * Auto-gc should be least intrusive as possible.
 		 */
-		prune = 0;
 		if (!need_to_gc())
 			return 0;
 		fprintf(stderr, "Auto packing your repository for optimum "
 			"performance. You may also\n"
 			"run \"git gc\" manually. See "
 			"\"git help gc\" for more information.\n");
-	} else {
-		/*
-		 * Use safer (for shared repos) "-A" option to
-		 * repack when not pruning. Auto-gc makes its
-		 * own decision.
-		 */
-		if (prune)
-			append_option(argv_repack, "-a", MAX_ADD);
-		else
-			append_option(argv_repack, "-A", MAX_ADD);
-	}
+	} else
+		append_option(argv_repack, "-A", MAX_ADD);
 
 	if (pack_refs && run_command_v_opt(argv_pack_refs, RUN_GIT_CMD))
 		return error(FAILED_RUN, argv_pack_refs[0]);