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strbuf_check_branch_ref(): a helper to check a refname for a branch
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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>
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Junio C Hamano committed Mar 23, 2009
1 parent 03d3aad commit a2fab53
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Showing 6 changed files with 17 additions and 17 deletions.
5 changes: 1 addition & 4 deletions branch.c
Original file line number Diff line number Diff line change
Expand Up @@ -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)) {
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8 changes: 2 additions & 6 deletions builtin-branch.c
Original file line number Diff line number Diff line change
Expand Up @@ -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)
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5 changes: 2 additions & 3 deletions builtin-check-ref-format.c
Original file line number Diff line number Diff line change
Expand Up @@ -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);
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7 changes: 3 additions & 4 deletions builtin-checkout.c
Original file line number Diff line number Diff line change
Expand Up @@ -733,12 +733,11 @@ int cmd_checkout(int argc, const char **argv, const char *prefix)

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);
}

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8 changes: 8 additions & 0 deletions strbuf.c
Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
#include "cache.h"
#include "refs.h"

int prefixcmp(const char *str, const char *prefix)
{
Expand Down Expand Up @@ -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);
}
1 change: 1 addition & 0 deletions strbuf.h
Original file line number Diff line number Diff line change
Expand Up @@ -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 */

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