bitbake: cache: Remove invalid symlink for bb_cache.dat

The bb_cache.dat might be an invalid symlink when error happens, then
os.path.exists(symlink) would return False for it, the invalid symlink
wouldn't be removed and os.symlink can't update it any more.

Use os.path.islink(symlink) can fix the problem.

(Bitbake rev: 1387d7b9ee3f270488f89b29f36f9f240e44accc)

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/bitbake/lib/bb/cache.py b/bitbake/lib/bb/cache.py
index 18d5574a31..4a96f5b313 100644
--- a/bitbake/lib/bb/cache.py
+++ b/bitbake/lib/bb/cache.py
@@ -441,7 +441,7 @@ class Cache(object):
         else:
             symlink = os.path.join(self.cachedir, "bb_cache.dat")
 
-        if os.path.exists(symlink):
+        if os.path.exists(symlink) or os.path.islink(symlink):
             bb.utils.remove(symlink)
         try:
             os.symlink(os.path.basename(self.cachefile), symlink)