[OE-core] [PATCH 2/2] oe.path: preserve xattr in copytree() and copyhardlinktree()

[Joshua Lock]

Pass appropriate options to tar invocations in copytree() and
copyhardlinktree() to ensure that any extended attributes on the files
are preserved during the copy.

We have to drop the use cpio in "Copy-pass" mode in copyhardlinktree()
because cpio doesn't support extended attributes on files. Instead we
revert back to using cp with different patterns depending on whether
or not the directory contains dot files.

[YOCTO #9857]

Signed-off-by: Joshua Lock <joshua.g.lock at intel.com>
---
 meta/lib/oe/path.py | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/meta/lib/oe/path.py b/meta/lib/oe/path.py
index 3c07df3..631c3b4 100644
--- a/meta/lib/oe/path.py
+++ b/meta/lib/oe/path.py
@@ -65,7 +65,7 @@ def copytree(src, dst):
     # This way we also preserve hardlinks between files in the tree.
 
     bb.utils.mkdirhier(dst)
-    cmd = 'tar -cf - -C %s -p . | tar -xf - -C %s' % (src, dst)
+    cmd = "tar --xattrs --xattrs-include='*' -cf - -C %s -p . | tar --xattrs --xattrs-include='*' -xf - -C %s" % (src, dst)
     subprocess.check_output(cmd, shell=True, stderr=subprocess.STDOUT)
 
 def copyhardlinktree(src, dst):
@@ -77,9 +77,14 @@ def copyhardlinktree(src, dst):
     if (os.stat(src).st_dev ==  os.stat(dst).st_dev):
         # Need to copy directories only with tar first since cp will error if two 
         # writers try and create a directory at the same time
-        cmd = 'cd %s; find . -type d -print | tar -cf - -C %s -p --no-recursion --files-from - | tar -xf - -C %s' % (src, src, dst)
+        cmd = "cd %s; find . -type d -print | tar --xattrs --xattrs-include='*' -cf - -C %s -p --no-recursion --files-from - | tar --xattrs --xattrs-include='*' -xf - -C %s" % (src, src, dst)
         subprocess.check_output(cmd, shell=True, stderr=subprocess.STDOUT)
-        cmd = 'cd %s; find . -print0 | cpio --null -pdlu %s' % (src, dst)
+        if os.path.isdir(src):
+            import glob
+            if len(glob.glob('%s/.??*' % src)) > 0:
+                src = src + '/.??* '
+            src = src + '/*'
+        cmd = 'cp -afl --preserve=xattr %s %s' % (src, dst)
         subprocess.check_output(cmd, shell=True, stderr=subprocess.STDOUT)
     else:
         copytree(src, dst)
-- 
2.7.4