refs: drop strbuf_ prefix from helpers

The helper functions (strbuf_branchname, strbuf_check_branch_ref,
and strbuf_check_tag_ref) are about handling branch and tag names,
and it is a non-essential fact that these functions use strbuf to
hold these names.  Rename them to make it clarify that these are
more about "ref".

Signed-off-by: Junio C Hamano <gitster@pobox.com>

branch.c

@@ -372,7 +372,7 @@ int read_branch_desc(struct strbuf *buf, const char *branch_name)
  */
 int validate_branchname(const char *name, struct strbuf *ref)
 {
-	if (strbuf_check_branch_ref(ref, name)) {
+	if (check_branch_ref(ref, name)) {
 		int code = die_message(_("'%s' is not a valid branch name"), name);
 		advise_if_enabled(ADVICE_REF_SYNTAX,
 				  _("See `man git check-ref-format`"));

builtin/branch.c

@@ -257,7 +257,7 @@ static int delete_branches(int argc, const char **argv, int force, int kinds,
 		char *target = NULL;
 		int flags = 0;
 
-		strbuf_branchname(&bname, argv[i], allowed_interpret);
+		copy_branchname(&bname, argv[i], allowed_interpret);
 		free(name);
 		name = mkpathdup(fmt, bname.buf);
 
@@ -579,7 +579,7 @@ static void copy_or_rename_branch(const char *oldname, const char *newname, int
 	int recovery = 0, oldref_usage = 0;
 	struct worktree **worktrees = get_worktrees();
 
-	if (strbuf_check_branch_ref(&oldref, oldname)) {
+	if (check_branch_ref(&oldref, oldname)) {
 		/*
 		 * Bad name --- this could be an attempt to rename a
 		 * ref that we used to allow to be created by accident.
@@ -894,7 +894,7 @@ int cmd_branch(int argc,
 				die(_("cannot give description to detached HEAD"));
 			branch_name = head;
 		} else if (argc == 1) {
-			strbuf_branchname(&buf, argv[0], INTERPRET_BRANCH_LOCAL);
+			copy_branchname(&buf, argv[0], INTERPRET_BRANCH_LOCAL);
 			branch_name = buf.buf;
 		} else {
 			die(_("cannot edit description of more than one branch"));
@@ -933,7 +933,7 @@ int cmd_branch(int argc,
 		if (!argc)
 			branch = branch_get(NULL);
 		else if (argc == 1) {
-			strbuf_branchname(&buf, argv[0], INTERPRET_BRANCH_LOCAL);
+			copy_branchname(&buf, argv[0], INTERPRET_BRANCH_LOCAL);
 			branch = branch_get(buf.buf);
 		} else
 			die(_("too many arguments to set new upstream"));
@@ -963,7 +963,7 @@ int cmd_branch(int argc,
 		if (!argc)
 			branch = branch_get(NULL);
 		else if (argc == 1) {
-			strbuf_branchname(&buf, argv[0], INTERPRET_BRANCH_LOCAL);
+			copy_branchname(&buf, argv[0], INTERPRET_BRANCH_LOCAL);
 			branch = branch_get(buf.buf);
 		} else
 			die(_("too many arguments to unset upstream"));

builtin/check-ref-format.c

@@ -42,7 +42,7 @@ static int check_ref_format_branch(const char *arg)
 	int nongit;
 
 	setup_git_directory_gently(&nongit);
-	if (strbuf_check_branch_ref(&sb, arg) ||
+	if (check_branch_ref(&sb, arg) ||
 	    !skip_prefix(sb.buf, "refs/heads/", &name))
 		die("'%s' is not a valid branch name", arg);
 	printf("%s\n", name);

builtin/checkout.c

@@ -742,7 +742,7 @@ static void setup_branch_path(struct branch_info *branch)
 			   &branch->oid, &branch->refname, 0))
 		repo_get_oid_committish(the_repository, branch->name, &branch->oid);
 
-	strbuf_branchname(&buf, branch->name, INTERPRET_BRANCH_LOCAL);
+	copy_branchname(&buf, branch->name, INTERPRET_BRANCH_LOCAL);
 	if (strcmp(buf.buf, branch->name)) {
 		free(branch->name);
 		branch->name = xstrdup(buf.buf);

builtin/merge.c

@@ -498,7 +498,7 @@ static void merge_name(const char *remote, struct strbuf *msg)
 	char *found_ref = NULL;
 	int len, early;
 
-	strbuf_branchname(&bname, remote, 0);
+	copy_branchname(&bname, remote, 0);
 	remote = bname.buf;
 
 	oidclr(&branch_head, the_repository->hash_algo);

builtin/tag.c

@@ -639,7 +639,7 @@ int cmd_tag(int argc,
 	if (repo_get_oid(the_repository, object_ref, &object))
 		die(_("Failed to resolve '%s' as a valid ref."), object_ref);
 
-	if (strbuf_check_tag_ref(&ref, tag))
+	if (check_tag_ref(&ref, tag))
 		die(_("'%s' is not a valid tag name."), tag);
 
 	if (refs_read_ref(get_main_ref_store(the_repository), ref.buf, &prev))

builtin/worktree.c

@@ -432,7 +432,7 @@ static int add_worktree(const char *path, const char *refname,
 	worktrees = NULL;
 
 	/* is 'refname' a branch or commit? */
-	if (!opts->detach && !strbuf_check_branch_ref(&symref, refname) &&
+	if (!opts->detach && !check_branch_ref(&symref, refname) &&
 	    refs_ref_exists(get_main_ref_store(the_repository), symref.buf)) {
 		is_branch = 1;
 		if (!opts->force)
@@ -604,7 +604,7 @@ static void print_preparing_worktree_line(int detach,
 		fprintf_ln(stderr, _("Preparing worktree (new branch '%s')"), new_branch);
 	} else {
 		struct strbuf s = STRBUF_INIT;
-		if (!detach && !strbuf_check_branch_ref(&s, branch) &&
+		if (!detach && !check_branch_ref(&s, branch) &&
 		    refs_ref_exists(get_main_ref_store(the_repository), s.buf))
 			fprintf_ln(stderr, _("Preparing worktree (checking out '%s')"),
 				  branch);
@@ -745,7 +745,7 @@ static char *dwim_branch(const char *path, char **new_branch)
 	char *branchname = xstrndup(s, n);
 	struct strbuf ref = STRBUF_INIT;
 
-	branch_exists = !strbuf_check_branch_ref(&ref, branchname) &&
+	branch_exists = !check_branch_ref(&ref, branchname) &&
 			refs_ref_exists(get_main_ref_store(the_repository),
 					ref.buf);
 	strbuf_release(&ref);
@@ -838,7 +838,7 @@ static int add(int ac, const char **av, const char *prefix)
 		new_branch = new_branch_force;
 
 		if (!opts.force &&
-		    !strbuf_check_branch_ref(&symref, new_branch) &&
+		    !check_branch_ref(&symref, new_branch) &&
 		    refs_ref_exists(get_main_ref_store(the_repository), symref.buf))
 			die_if_checked_out(symref.buf, 0);
 		strbuf_release(&symref);

gitweb/gitweb.perl

@@ -2094,7 +2094,7 @@ sub format_log_line_html {
         (
             # The output of "git describe", e.g. v2.10.0-297-gf6727b0
             # or hadoop-20160921-113441-20-g094fb7d
-            (?<!-) # see strbuf_check_tag_ref(). Tags can't start with -
+            (?<!-) # see check_tag_ref(). Tags can't start with -
             [A-Za-z0-9.-]+
             (?!\.) # refs can't end with ".", see check_refname_format()
             -g$regex

refs.c

@@ -697,7 +697,7 @@ static char *substitute_branch_name(struct repository *r,
 	return NULL;
 }
 
-void strbuf_branchname(struct strbuf *sb, const char *name, unsigned allowed)
+void copy_branchname(struct strbuf *sb, const char *name, unsigned allowed)
 {
 	int len = strlen(name);
 	struct interpret_branch_name_options options = {
@@ -711,10 +711,10 @@ void strbuf_branchname(struct strbuf *sb, const char *name, unsigned allowed)
 	strbuf_add(sb, name + used, len - used);
 }
 
-int strbuf_check_branch_ref(struct strbuf *sb, const char *name)
+int check_branch_ref(struct strbuf *sb, const char *name)
 {
 	if (startup_info->have_repository)
-		strbuf_branchname(sb, name, INTERPRET_BRANCH_LOCAL);
+		copy_branchname(sb, name, INTERPRET_BRANCH_LOCAL);
 	else
 		strbuf_addstr(sb, name);
 
@@ -733,7 +733,7 @@ int strbuf_check_branch_ref(struct strbuf *sb, const char *name)
 	return check_refname_format(sb->buf, 0);
 }
 
-int strbuf_check_tag_ref(struct strbuf *sb, const char *name)
+int check_tag_ref(struct strbuf *sb, const char *name)
 {
 	if (name[0] == '-')
 		return -1;

refs.h

@@ -191,23 +191,23 @@ char *repo_default_branch_name(struct repository *r, int quiet);
  * If "allowed" is non-zero, restrict the set of allowed expansions. See
  * repo_interpret_branch_name() for details.
  */
-void strbuf_branchname(struct strbuf *sb, const char *name,
+void copy_branchname(struct strbuf *sb, const char *name,
 		       unsigned allowed);
 
 /*
- * Like strbuf_branchname() above, but confirm that the result is
+ * Like copy_branchname() above, but confirm that the result is
  * syntactically valid to be used as a local branch name in refs/heads/.
  *
  * The return value is "0" if the result is valid, and "-1" otherwise.
  */
-int strbuf_check_branch_ref(struct strbuf *sb, const char *name);
+int check_branch_ref(struct strbuf *sb, const char *name);
 
 /*
  * Similar for a tag name in refs/tags/.
  *
  * The return value is "0" if the result is valid, and "-1" otherwise.
  */
-int strbuf_check_tag_ref(struct strbuf *sb, const char *name);
+int check_tag_ref(struct strbuf *sb, const char *name);
 
 /*
  * A ref_transaction represents a collection of reference updates that