[PATCH] package_manager.py: check the dest before create hard link

[<mingli.yu@windriver.com>]

From: Mingli Yu <Mingli.Yu@windriver.com>

After create_packages_dir added in below commit:
85e72e1 package_manager: Filter to only rpms we depend upon

When add below line into conf/local.conf
INHERIT += "packagefeed-stability"

There comes below error when do_rootfs
Exception: FileExistsError: [Errno 17] File exists: '/$Prj/tmp/deploy/rpm-prediff/i586/initscripts-1.0-r155.i586.rpm' -> '/$Prj/tmp/work/qemux86-poky-linux/core-image-minimal/1.0-r0/oe-rootfs-repo/rpm-prediff/i586/initscripts-1.0-r155.i586.rpm'

Add the check before create hard link to
avoid the above error.

Signed-off-by: Mingli Yu <Mingli.Yu@windriver.com>
---
 meta/lib/oe/package_manager.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/meta/lib/oe/package_manager.py b/meta/lib/oe/package_manager.py
index 2cc1c752b3..5d4739d66d 100644
--- a/meta/lib/oe/package_manager.py
+++ b/meta/lib/oe/package_manager.py
@@ -703,7 +703,8 @@ def create_packages_dir(d, subrepo_dir, deploydir, taskname, filterbydependencie
                     bb.utils.mkdirhier(destdir)
                     seendirs.add(destdir)
                 try:
-                    os.link(l, dest)
+                    if not os.path.exists(dest):
+                        os.link(l, dest)
                 except OSError as err:
                     if err.errno == errno.EXDEV:
                         bb.utils.copyfile(l, dest)
-- 
2.18.0