refs: drop force_create argument of create_reflog API

There is only one caller, builtin/checkout.c, and it hardcodes
force_create=1.

This argument was introduced in abd0cd3a30 (refs: new public ref function:
safe_create_reflog, 2015-07-21), which promised to immediately use it in a
follow-on commit, but that never happened.

Signed-off-by: Han-Wen Nienhuys <hanwen@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/checkout.c

@@ -874,7 +874,7 @@ static void update_refs_for_switch(const struct checkout_opts *opts,
 				int ret;
 				struct strbuf err = STRBUF_INIT;
 
-				ret = safe_create_reflog(refname, 1, &err);
+				ret = safe_create_reflog(refname, &err);
 				if (ret) {
 					fprintf(stderr, _("Can not do reflog for '%s': %s\n"),
 						opts->new_orphan_branch, err.buf);

refs.c

@@ -2358,16 +2358,15 @@ int reflog_exists(const char *refname)
 }
 
 int refs_create_reflog(struct ref_store *refs, const char *refname,
-		       int force_create, struct strbuf *err)
-{
-	return refs->be->create_reflog(refs, refname, force_create, err);
-}
-
-int safe_create_reflog(const char *refname, int force_create,
 		       struct strbuf *err)
+{
+	return refs->be->create_reflog(refs, refname, err);
+}
+
+int safe_create_reflog(const char *refname, struct strbuf *err)
 {
 	return refs_create_reflog(get_main_ref_store(the_repository), refname,
-				  force_create, err);
+				  err);
 }
 
 int refs_delete_reflog(struct ref_store *refs, const char *refname)

refs.h

@@ -413,8 +413,8 @@ int refs_pack_refs(struct ref_store *refs, unsigned int flags);
  * Setup reflog before using. Fill in err and return -1 on failure.
  */
 int refs_create_reflog(struct ref_store *refs, const char *refname,
-		       int force_create, struct strbuf *err);
+		       struct strbuf *err);
-int safe_create_reflog(const char *refname, int force_create, struct strbuf *err);
+int safe_create_reflog(const char *refname, struct strbuf *err);
 
 /** Reads log for the value of ref during at_time. **/
 int read_ref_at(struct ref_store *refs,

refs/debug.c

@@ -339,11 +339,10 @@ static int debug_reflog_exists(struct ref_store *ref_store, const char *refname)
 }
 
 static int debug_create_reflog(struct ref_store *ref_store, const char *refname,
-			       int force_create, struct strbuf *err)
+			       struct strbuf *err)
 {
 	struct debug_ref_store *drefs = (struct debug_ref_store *)ref_store;
-	int res = drefs->refs->be->create_reflog(drefs->refs, refname,
+	int res = drefs->refs->be->create_reflog(drefs->refs, refname, err);
-						 force_create, err);
 	trace_printf_key(&trace_refs, "create_reflog: %s: %d\n", refname, res);
 	return res;
 }

refs/files-backend.c

@@ -1639,15 +1639,14 @@ error:
 	return -1;
 }
 
-static int files_create_reflog(struct ref_store *ref_store,
+static int files_create_reflog(struct ref_store *ref_store, const char *refname,
-			       const char *refname, int force_create,
 			       struct strbuf *err)
 {
 	struct files_ref_store *refs =
 		files_downcast(ref_store, REF_STORE_WRITE, "create_reflog");
 	int fd;
 
-	if (log_ref_setup(refs, refname, force_create, &fd, err))
+	if (log_ref_setup(refs, refname, 1, &fd, err))
 		return -1;
 
 	if (fd >= 0)

refs/packed-backend.c

@@ -1628,8 +1628,7 @@ static int packed_reflog_exists(struct ref_store *ref_store,
 }
 
 static int packed_create_reflog(struct ref_store *ref_store,
-			       const char *refname, int force_create,
+				const char *refname, struct strbuf *err)
-			       struct strbuf *err)
 {
 	BUG("packed reference store does not support reflogs");
 }

refs/refs-internal.h

@@ -606,7 +606,7 @@ typedef int for_each_reflog_ent_reverse_fn(struct ref_store *ref_store,
 					   void *cb_data);
 typedef int reflog_exists_fn(struct ref_store *ref_store, const char *refname);
 typedef int create_reflog_fn(struct ref_store *ref_store, const char *refname,
-			     int force_create, struct strbuf *err);
+			     struct strbuf *err);
 typedef int delete_reflog_fn(struct ref_store *ref_store, const char *refname);
 typedef int reflog_expire_fn(struct ref_store *ref_store,
 			     const char *refname,

t/helper/test-ref-store.c

@@ -181,11 +181,10 @@ static int cmd_reflog_exists(struct ref_store *refs, const char **argv)
 static int cmd_create_reflog(struct ref_store *refs, const char **argv)
 {
 	const char *refname = notnull(*argv++, "refname");
-	int force_create = arg_flags(*argv++, "force-create");
 	struct strbuf err = STRBUF_INIT;
 	int ret;
 
-	ret = refs_create_reflog(refs, refname, force_create, &err);
+	ret = refs_create_reflog(refs, refname, &err);
 	if (err.len)
 		puts(err.buf);
 	return ret;

t/t1405-main-ref-store.sh

@@ -108,7 +108,7 @@ test_expect_success 'delete_reflog(HEAD)' '
 '
 
 test_expect_success 'create-reflog(HEAD)' '
-	$RUN create-reflog HEAD 1 &&
+	$RUN create-reflog HEAD &&
 	git reflog exists HEAD
 '
 

t/t1406-submodule-ref-store.sh

@@ -92,7 +92,7 @@ test_expect_success 'delete_reflog() not allowed' '
 '
 
 test_expect_success 'create-reflog() not allowed' '
-	test_must_fail $RUN create-reflog HEAD 1
+	test_must_fail $RUN create-reflog HEAD
 '
 
 test_done