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[PATCH] Allow reading "symbolic refs" that point to other refs

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This extends the ref reading to understand a "symbolic ref": a ref file
that starts with "ref: " and points to another ref file, and thus
introduces the notion of ref aliases.

This is in preparation of allowing HEAD to eventually not be a symlink,
but one of these symbolic refs instead.

[jc: Linus originally required the prefix to be "ref: " five bytes
 and nothing else, but I changed it to allow and strip any number of
 leading whitespaces to match what update-ref.c does.]

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Linus Torvalds
2005-09-25 09:59:37 -07:00
committed by Junio C Hamano
parent 9b143c6e15
commit ca8db1424d
3 changed files with 42 additions and 49 deletions
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1
cache.h
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@ -229,6 +229,7 @@ extern int has_pack_index(const unsigned char *sha1);
extern int get_sha1(const char *str, unsigned char *sha1);
extern int get_sha1_hex(const char *hex, unsigned char *sha1);
extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
extern int read_ref(const char *filename, unsigned char *sha1);
/* General helper functions */
extern void usage(const char *err) NORETURN;