[OE-core] [PATCH] rootfs-postcommands: handle broken links when writing manifest

[Ross Burton]

If the manifest link is broken then os.path.exists() returns False so the link
isn't removed, resulting in the os.symlink() call failing as the file already
exists.  Prevent this by using os.path.lexists to check that the symlink itself
exists, not the target.

Signed-off-by: Ross Burton <ross.burton at intel.com>
---
 meta/classes/rootfs-postcommands.bbclass | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/meta/classes/rootfs-postcommands.bbclass b/meta/classes/rootfs-postcommands.bbclass
index 56e810f..95d28af 100644
--- a/meta/classes/rootfs-postcommands.bbclass
+++ b/meta/classes/rootfs-postcommands.bbclass
@@ -225,7 +225,7 @@ python write_image_manifest () {
 
     if os.path.exists(manifest_name):
         manifest_link = deploy_dir + "/" + link_name + ".manifest"
-        if os.path.exists(manifest_link):
+        if os.path.lexists(manifest_link):
             if d.getVar('RM_OLD_IMAGE', True) == "1" and \
                     os.path.exists(os.path.realpath(manifest_link)):
                 os.remove(os.path.realpath(manifest_link))
@@ -275,5 +275,3 @@ rootfs_check_host_user_contaminated () {
 rootfs_sysroot_relativelinks () {
 	sysroot-relativelinks.py ${SDK_OUTPUT}/${SDKTARGETSYSROOT}
 }
-
-
-- 
2.8.0.rc3