[PATCH 28/32] gc: support prune --repos

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
---
 Documentation/config.txt |  7 +++++++
 builtin/gc.c             | 11 +++++++++++
 2 files changed, 18 insertions(+)

diff --git a/Documentation/config.txt b/Documentation/config.txt
index 286e539..57999fa 100644
--- a/Documentation/config.txt
+++ b/Documentation/config.txt
@@ -1211,6 +1211,13 @@ gc.pruneexpire::
 	"now" may be used to disable this  grace period and always prune
 	unreachable objects immediately.
 
+gc.prunereposexpire::
+	When 'git gc' is run, it will call
+	'prune --repos --expire 3.months.ago'.
+	Override the grace period with this config variable. The value
+	"now" may be used to disable the grace period and prune
+	$GIT_DIR/repos immediately.
+
 gc.reflogexpire::
 gc.<pattern>.reflogexpire::
 	'git reflog expire' removes reflog entries older than
diff --git a/builtin/gc.c b/builtin/gc.c
index e38c902..0c65808 100644
--- a/builtin/gc.c
+++ b/builtin/gc.c
@@ -33,11 +33,13 @@ static int gc_auto_threshold = 6700;
 static int gc_auto_pack_limit = 50;
 static int detach_auto = 1;
 static const char *prune_expire = "2.weeks.ago";
+static const char *prune_repos_expire = "3.months.ago";
 
 static struct argv_array pack_refs_cmd = ARGV_ARRAY_INIT;
 static struct argv_array reflog = ARGV_ARRAY_INIT;
 static struct argv_array repack = ARGV_ARRAY_INIT;
 static struct argv_array prune = ARGV_ARRAY_INIT;
+static struct argv_array prune_repos = ARGV_ARRAY_INIT;
 static struct argv_array rerere = ARGV_ARRAY_INIT;
 
 static char *pidfile;
@@ -97,6 +99,8 @@ static int gc_config(const char *var, const char *value, void *cb)
 	}
 	if (!strcmp(var, "gc.pruneexpire"))
 		return git_config_date_string(&prune_expire, var, value);
+	if (!strcmp(var, "gc.prunereposexpire"))
+		return git_config_date_string(&prune_repos_expire, var, value);
 	return git_default_config(var, value, cb);
 }
 
@@ -304,6 +308,7 @@ int cmd_gc(int argc, const char **argv, const char *prefix)
 	argv_array_pushl(&reflog, "reflog", "expire", "--all", NULL);
 	argv_array_pushl(&repack, "repack", "-d", "-l", NULL);
 	argv_array_pushl(&prune, "prune", "--expire", NULL);
+	argv_array_pushl(&prune_repos, "prune", "--repos", "--expire", NULL);
 	argv_array_pushl(&rerere, "rerere", "gc", NULL);
 
 	git_config(gc_config, NULL);
@@ -373,6 +378,12 @@ int cmd_gc(int argc, const char **argv, const char *prefix)
 			return error(FAILED_RUN, prune.argv[0]);
 	}
 
+	if (prune_repos_expire) {
+		argv_array_push(&prune_repos, prune_repos_expire);
+		if (run_command_v_opt(prune_repos.argv, RUN_GIT_CMD))
+			return error(FAILED_RUN, prune_repos.argv[0]);
+	}
+
 	if (run_command_v_opt(rerere.argv, RUN_GIT_CMD))
 		return error(FAILED_RUN, rerere.argv[0]);
 
-- 
2.1.0.rc0.78.gc0d8480