check_path(): allow symlinked directories to checkout-index --prefix

Merlyn noticed that Documentation/install-doc-quick.sh no longer correctly
removes old installed documents when the target directory has a leading
path that is a symlink.  It turns out that "checkout-index --prefix" was
broken by recent b6986d8 (git-checkout: be careful about untracked
symlinks, 2009-07-29).

I suspect has_symlink_leading_path() could learn the third parameter
(prefix that is allowed to be symlinked directories) to allow us to retire
a similar function has_dirs_only_path().

Another avenue of fixing this I considered was to get rid of base_dir and
base_dir_len from "struct checkout", and instead make "git checkout-index"
when run with --prefix mkdir the leading path and chdir in there.  It
might be the best longer term solution to this issue, as the base_dir
feature is used only by that rather obscure codepath as far as I know.

But at least this patch should fix this breakage.

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

1 files changed, 1 insertions, 1 deletions

diff --git a/cache.h b/cache.h
index 9222774e6..2c2f05c3e 100644
--- a/cache.h
+++ b/cache.h
@@ -469,7 +469,7 @@ extern int index_path(unsigned char *sha1, const char *path, struct stat *st, in
 extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
 
 /* "careful lstat()" */
-extern int check_path(const char *path, int len, struct stat *st);
+extern int check_path(const char *path, int len, struct stat *st, int skiplen);
 
 #define REFRESH_REALLY		0x0001	/* ignore_valid */
 #define REFRESH_UNMERGED	0x0002	/* allow unmerged */