builtin/refs: add verify subcommand

Introduce a new subcommand "verify" in git-refs(1) to allow the user to
check the reference database consistency and also this subcommand will
be used as the entry point of checking refs for "git-fsck(1)".

Add "verbose" field into "fsck_options" to indicate whether we should
print verbose messages when checking refs and objects consistency.

Remove bit-field for "strict" field, this is because we cannot take
address of a bit-field which makes it unhandy to set member variables
when parsing the command line options.

The "git-fsck(1)" declares "fsck_options" variable with "static"
identifier which avoids complaint by the leak-checker. However, in
"git-refs verify", we need to do memory clean manually. Thus add
"fsck_options_clear" function in "fsck.c" to provide memory clean
operation.

Mentored-by: Patrick Steinhardt <ps@pks.im>
Mentored-by: Karthik Nayak <karthik.188@gmail.com>
Signed-off-by: shejialuo <shejialuo@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 34 insertions, 0 deletions

diff --git a/builtin/refs.c b/builtin/refs.c
index 46dcd150d4..131f98be98 100644
--- a/builtin/refs.c
+++ b/builtin/refs.c
@@ -1,4 +1,6 @@
 #include "builtin.h"
+#include "config.h"
+#include "fsck.h"
 #include "parse-options.h"
 #include "refs.h"
 #include "repository.h"
@@ -7,6 +9,9 @@
 #define REFS_MIGRATE_USAGE \
 	N_("git refs migrate --ref-format=<format> [--dry-run]")
 
+#define REFS_VERIFY_USAGE \
+	N_("git refs verify [--strict] [--verbose]")
+
 static int cmd_refs_migrate(int argc, const char **argv, const char *prefix)
 {
 	const char * const migrate_usage[] = {
@@ -58,15 +63,44 @@ out:
 	return err;
 }
 
+static int cmd_refs_verify(int argc, const char **argv, const char *prefix)
+{
+	struct fsck_options fsck_refs_options = FSCK_REFS_OPTIONS_DEFAULT;
+	const char * const verify_usage[] = {
+		REFS_VERIFY_USAGE,
+		NULL,
+	};
+	struct option options[] = {
+		OPT_BOOL(0, "verbose", &fsck_refs_options.verbose, N_("be verbose")),
+		OPT_BOOL(0, "strict", &fsck_refs_options.strict, N_("enable strict checking")),
+		OPT_END(),
+	};
+	int ret;
+
+	argc = parse_options(argc, argv, prefix, options, verify_usage, 0);
+	if (argc)
+		usage(_("'git refs verify' takes no arguments"));
+
+	git_config(git_fsck_config, &fsck_refs_options);
+	prepare_repo_settings(the_repository);
+
+	ret = refs_fsck(get_main_ref_store(the_repository), &fsck_refs_options);
+
+	fsck_options_clear(&fsck_refs_options);
+	return ret;
+}
+
 int cmd_refs(int argc, const char **argv, const char *prefix)
 {
 	const char * const refs_usage[] = {
 		REFS_MIGRATE_USAGE,
+		REFS_VERIFY_USAGE,
 		NULL,
 	};
 	parse_opt_subcommand_fn *fn = NULL;
 	struct option opts[] = {
 		OPT_SUBCOMMAND("migrate", &fn, cmd_refs_migrate),
+		OPT_SUBCOMMAND("verify", &fn, cmd_refs_verify),
 		OPT_END(),
 	};