path: root/refs.h
diff options
authorJunio C Hamano <>2011-06-06 05:17:04 (GMT)
committerJunio C Hamano <>2011-06-06 05:17:04 (GMT)
commitc17b229454ac3f5d20fd0cff3a663b03c13cb38e (patch)
treef6b58684601a2da3bc6cf802ce764f072dd5c932 /refs.h
parent02ac98374eefbe4a46d4b53a8a78057ad8ad39b7 (diff)
checkout -b <name>: correctly detect existing branch
When create a new branch, we fed "refs/heads/<proposed name>" as a string to get_sha1() and expected it to fail when a branch already exists. The right way to check if a ref exists is to check with resolve_ref(). A naïve solution that might appear attractive but does not work is to forbid slashes in get_describe_name() but that will not work. A describe name is is in the form of "ANYTHING-g<short sha1>", and that ANYTHING part comes from a original tag name used in the repository the user ran the describe command. A sick user could have a confusing hierarchical tag whose name is "refs/heads/foobar" (stored as refs/tags/refs/heads/foobar") to generate a describe name "refs/heads/foobar-6-g02ac983", and we should be able to use that name to refer to the object whose name is 02ac983. Signed-off-by: Junio C Hamano <>
Diffstat (limited to 'refs.h')
1 files changed, 1 insertions, 0 deletions
diff --git a/refs.h b/refs.h
index 762ce50..070a7d9 100644
--- a/refs.h
+++ b/refs.h
@@ -46,6 +46,7 @@ extern void warn_dangling_symref(FILE *fp, const char *msg_fmt, const char *refn
extern void add_extra_ref(const char *refname, const unsigned char *sha1, int flags);
extern void clear_extra_refs(void);
+extern int ref_exists(char *);
extern int peel_ref(const char *, unsigned char *);