strbuf_check_branch_ref(): a helper to check a refname for a branch

This allows a common calling sequence

	strbuf_branchname(&ref, name);
	strbuf_splice(&ref, 0, 0, "refs/heads/", 11);
	if (check_ref_format(ref.buf))
		die(...);

to be refactored into

	if (strbuf_check_branch_ref(&ref, name))
		die(...);

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

diff --git a/branch.c b/branch.c
index 558f092701f7aa797a0b38a48f67fef6f0218f9c..62030af4b51abbfb9c488dbf018770f3b3606789 100644 (file)
--- a/branch.c
+++ b/branch.c
@@ -135,10 +135,7 @@ void create_branch(const char *head,
        struct strbuf ref = STRBUF_INIT;
        int forcing = 0;
 
-       strbuf_branchname(&ref, name);
-       strbuf_splice(&ref, 0, 0, "refs/heads/", 11);
-
-       if (check_ref_format(ref.buf))
+       if (strbuf_check_branch_ref(&ref, name))
                die("'%s' is not a valid branch name.", name);
 
        if (resolve_ref(ref.buf, sha1, 1, NULL)) {

diff --git a/builtin-branch.c b/builtin-branch.c
index 0df82bf96d7f06426ac0ff89f3410714257c20fd..afeed68cfd7482c40a276c00ef3b7bfd09433950 100644 (file)
--- a/builtin-branch.c
+++ b/builtin-branch.c
@@ -468,14 +468,10 @@ static void rename_branch(const char *oldname, const char *newname, int force)
        if (!oldname)
                die("cannot rename the current branch while not on any.");
 
-       strbuf_branchname(&oldref, oldname);
-       strbuf_splice(&oldref, 0, 0, "refs/heads/", 11);
-       if (check_ref_format(oldref.buf))
+       if (strbuf_check_branch_ref(&oldref, oldname))
                die("Invalid branch name: '%s'", oldname);
 
-       strbuf_branchname(&newref, newname);
-       strbuf_splice(&newref, 0, 0, "refs/heads/", 11);
-       if (check_ref_format(newref.buf))
+       if (strbuf_check_branch_ref(&newref, newname))
                die("Invalid branch name: '%s'", newname);
 
        if (resolve_ref(newref.buf, sha1, 1, NULL) && !force)

diff --git a/builtin-check-ref-format.c b/builtin-check-ref-format.c
index 39db6cbe47d77f84bd2d1d8d98942be89aaa1bf7..f9381e07eaeda673e91ef6250eca4027c5ba0278 100644 (file)
--- a/builtin-check-ref-format.c
+++ b/builtin-check-ref-format.c
@@ -11,9 +11,8 @@ int cmd_check_ref_format(int argc, const char **argv, const char *prefix)
 {
        if (argc == 3 && !strcmp(argv[1], "--branch")) {
                struct strbuf sb = STRBUF_INIT;
-               strbuf_branchname(&sb, argv[2]);
-               strbuf_splice(&sb, 0, 0, "refs/heads/", 11);
-               if (check_ref_format(sb.buf))
+
+               if (strbuf_check_branch_ref(&sb, argv[2]))
                        die("'%s' is not a valid branch name", argv[2]);
                printf("%s\n", sb.buf + 11);
                exit(0);

diff --git a/builtin-checkout.c b/builtin-checkout.c
index b2680466d86a0456c01dfb900c30571b5a2cba4a..66df0c072cba89e74af26a767a6fa9b65d5449ef 100644 (file)
--- a/builtin-checkout.c
+++ b/builtin-checkout.c
@@ -733,12 +733,11 @@ no_reference:
 
        if (opts.new_branch) {
                struct strbuf buf = STRBUF_INIT;
-               strbuf_addstr(&buf, "refs/heads/");
-               strbuf_addstr(&buf, opts.new_branch);
+               if (strbuf_check_branch_ref(&buf, opts.new_branch))
+                       die("git checkout: we do not like '%s' as a branch name.",
+                           opts.new_branch);
                if (!get_sha1(buf.buf, rev))
                        die("git checkout: branch %s already exists", opts.new_branch);
-               if (check_ref_format(buf.buf))
-                       die("git checkout: we do not like '%s' as a branch name.", opts.new_branch);
                strbuf_release(&buf);
        }
 

diff --git a/strbuf.c b/strbuf.c
index a60b0ad67d22b02f81cc44acd38b9b8ac3744af3..a88496030b7053a543173c299bd9f54b923db2ec 100644 (file)
--- a/strbuf.c
+++ b/strbuf.c
@@ -1,4 +1,5 @@
 #include "cache.h"
+#include "refs.h"
 
 int prefixcmp(const char *str, const char *prefix)
 {
@@ -366,3 +367,10 @@ int strbuf_branchname(struct strbuf *sb, const char *name)
        strbuf_add(sb, name, len);
        return len;
 }
+
+int strbuf_check_branch_ref(struct strbuf *sb, const char *name)
+{
+       strbuf_branchname(sb, name);
+       strbuf_splice(sb, 0, 0, "refs/heads/", 11);
+       return check_ref_format(sb->buf);
+}

diff --git a/strbuf.h b/strbuf.h
index 68923e1908560641aed9592c4ed3afd6cfd73717..9ee908a3ec5d4d5329385bc10cdd676f703c0c1f 100644 (file)
--- a/strbuf.h
+++ b/strbuf.h
@@ -132,5 +132,6 @@ extern void stripspace(struct strbuf *buf, int skip_comments);
 extern int launch_editor(const char *path, struct strbuf *buffer, const char *const *env);
 
 extern int strbuf_branchname(struct strbuf *sb, const char *name);
+extern int strbuf_check_branch_ref(struct strbuf *sb, const char *name);
 
 #endif /* STRBUF_H */