From da02ca508b842e61c71d920310ff30bbe0238993 Mon Sep 17 00:00:00 2001 From: Junio C Hamano Date: Sun, 16 Aug 2009 23:53:12 -0700 Subject: [PATCH] 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 --- cache.h | 2 +- entry.c | 12 ++++++++---- t/t2000-checkout-cache-clash.sh | 9 +++++++++ 3 files changed, 18 insertions(+), 5 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 */ diff --git a/entry.c b/entry.c index f276cf3b8..06d24f14c 100644 --- a/entry.c +++ b/entry.c @@ -177,11 +177,15 @@ static int write_entry(struct cache_entry *ce, char *path, const struct checkout /* * This is like 'lstat()', except it refuses to follow symlinks - * in the path. + * in the path, after skipping "skiplen". */ -int check_path(const char *path, int len, struct stat *st) +int check_path(const char *path, int len, struct stat *st, int skiplen) { - if (has_symlink_leading_path(path, len)) { + const char *slash = path + len; + + while (path < slash && *slash != '/') + slash--; + if (!has_dirs_only_path(path, slash - path, skiplen)) { errno = ENOENT; return -1; } @@ -201,7 +205,7 @@ int checkout_entry(struct cache_entry *ce, const struct checkout *state, char *t strcpy(path + len, ce->name); len += ce_namelen(ce); - if (!check_path(path, len, &st)) { + if (!check_path(path, len, &st, state->base_dir_len)) { unsigned changed = ce_match_stat(ce, &st, CE_MATCH_IGNORE_VALID); if (!changed) return 0; diff --git a/t/t2000-checkout-cache-clash.sh b/t/t2000-checkout-cache-clash.sh index f7e1a735e..de3edb5d5 100755 --- a/t/t2000-checkout-cache-clash.sh +++ b/t/t2000-checkout-cache-clash.sh @@ -48,4 +48,13 @@ test_expect_success \ 'git checkout-index conflicting paths.' \ 'test -f path0 && test -d path1 && test -f path1/file1' +test_expect_success SYMLINKS 'checkout-index -f twice with --prefix' ' + mkdir -p tar/get && + ln -s tar/get there && + echo first && + git checkout-index -a -f --prefix=there/ && + echo second && + git checkout-index -a -f --prefix=there/ +' + test_done -- 2.30.2