[PATCH 1/2] builtin/reflog.c: use parse-options for expire subcommand

["John Cai via GitGitGadget" <gitgitgadget@gmail.com>]

From: John Cai <johncai86@gmail.com>

Switch out manual argv parsing for the reflog expire subcommand to use
the parse-options API.

Signed-off-by: "John Cai" <johncai86@gmail.com>
---
 builtin/reflog.c | 72 ++++++++++++++++++++++++------------------------
 1 file changed, 36 insertions(+), 36 deletions(-)

diff --git a/builtin/reflog.c b/builtin/reflog.c
index 175c83e7cc2..afaf5ba67e2 100644
--- a/builtin/reflog.c
+++ b/builtin/reflog.c
@@ -11,13 +11,8 @@
 #include "revision.h"
 #include "reachable.h"
 #include "worktree.h"
+#include "parse-options.h"
 
-/* NEEDSWORK: switch to using parse_options */
-static const char reflog_expire_usage[] =
-N_("git reflog expire [--expire=<time>] "
-   "[--expire-unreachable=<time>] "
-   "[--rewrite] [--updateref] [--stale-fix] [--dry-run | -n] "
-   "[--verbose] [--all] <refs>...");
 static const char reflog_delete_usage[] =
 N_("git reflog delete [--rewrite] [--updateref] "
    "[--dry-run | -n] [--verbose] <refs>...");
@@ -539,6 +534,14 @@ static void set_reflog_expiry_param(struct cmd_reflog_expire_cb *cb, int slot, c
 		cb->expire_unreachable = default_reflog_expire_unreachable;
 }
 
+static const char * reflog_expire_usage[] = {
+	N_("git reflog expire [--expire=<time>] "
+   "[--expire-unreachable=<time>] "
+   "[--rewrite] [--updateref] [--stale-fix] [--dry-run | -n] "
+   "[--verbose] [--all] <refs>..."),
+	NULL
+};
+
 static int cmd_reflog_expire(int argc, const char **argv, const char *prefix)
 {
 	struct expire_reflog_policy_cb cb;
@@ -547,6 +550,29 @@ static int cmd_reflog_expire(int argc, const char **argv, const char *prefix)
 	int explicit_expiry = 0;
 	unsigned int flags = 0;
 
+	const struct option options[] = {
+		OPT_BIT(0, "dry-run", &flags, N_("do not actually prune any entries"),
+				EXPIRE_REFLOGS_DRY_RUN),
+		OPT_BIT(0, "rewrite", &flags,
+				N_("rewrite the old SHA1 with the new SHA1 of the entry that now precedes it"),
+				EXPIRE_REFLOGS_REWRITE),
+		OPT_BIT(0, "updateref", &flags,
+				N_("update the reference to the value of the top reflog entry"),
+				EXPIRE_REFLOGS_UPDATE_REF),
+		OPT_BIT(0, "verbose", &flags, N_("print extra information on screen."),
+				EXPIRE_REFLOGS_VERBOSE),
+		OPT_EXPIRY_DATE(0, "expire", &cb.cmd.expire_total,
+				N_("prune entries older than the specified time")),
+		OPT_EXPIRY_DATE(0, "expire-unreachable", &cb.cmd.expire_unreachable,
+			N_("prune entries older than <time> that are not reachable from the current tip of the branch")),
+		OPT_BOOL(0, "stale-fix", &cb.cmd.stalefix,
+				N_("prune any reflog entries that point to broken commits")),
+		OPT_BOOL(0, "all", &do_all, N_("process the reflogs of all references")),
+		OPT_BOOL(1, "single-worktree", &all_worktrees,
+				N_("limits processing to reflogs from the current worktree only.")),
+		OPT_END()
+	};
+
 	default_reflog_expire_unreachable = now - 30 * 24 * 3600;
 	default_reflog_expire = now - 90 * 24 * 3600;
 	git_config(reflog_expire_config, NULL);
@@ -560,41 +586,15 @@ static int cmd_reflog_expire(int argc, const char **argv, const char *prefix)
 
 	for (i = 1; i < argc; i++) {
 		const char *arg = argv[i];
-
-		if (!strcmp(arg, "--dry-run") || !strcmp(arg, "-n"))
-			flags |= EXPIRE_REFLOGS_DRY_RUN;
-		else if (skip_prefix(arg, "--expire=", &arg)) {
-			if (parse_expiry_date(arg, &cb.cmd.expire_total))
-				die(_("'%s' is not a valid timestamp"), arg);
+		if (starts_with(arg, "--expire=")) {
 			explicit_expiry |= EXPIRE_TOTAL;
-		}
-		else if (skip_prefix(arg, "--expire-unreachable=", &arg)) {
-			if (parse_expiry_date(arg, &cb.cmd.expire_unreachable))
-				die(_("'%s' is not a valid timestamp"), arg);
+		} else if (starts_with(arg, "--expire-unreachable=")) {
 			explicit_expiry |= EXPIRE_UNREACH;
 		}
-		else if (!strcmp(arg, "--stale-fix"))
-			cb.cmd.stalefix = 1;
-		else if (!strcmp(arg, "--rewrite"))
-			flags |= EXPIRE_REFLOGS_REWRITE;
-		else if (!strcmp(arg, "--updateref"))
-			flags |= EXPIRE_REFLOGS_UPDATE_REF;
-		else if (!strcmp(arg, "--all"))
-			do_all = 1;
-		else if (!strcmp(arg, "--single-worktree"))
-			all_worktrees = 0;
-		else if (!strcmp(arg, "--verbose"))
-			flags |= EXPIRE_REFLOGS_VERBOSE;
-		else if (!strcmp(arg, "--")) {
-			i++;
-			break;
-		}
-		else if (arg[0] == '-')
-			usage(_(reflog_expire_usage));
-		else
-			break;
 	}
 
+	argc = parse_options(argc, argv, prefix, options, reflog_expire_usage, 0);
+
 	/*
 	 * We can trust the commits and objects reachable from refs
 	 * even in older repository.  We cannot trust what's reachable
-- 
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