[lorax] Use crc32 check when compressing with xz

[Martin Gracik <mgracik@xxxxxxxxxx>]

---
 src/pylorax/installtree.py |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/src/pylorax/installtree.py b/src/pylorax/installtree.py
index f7502eb..13ae6f1 100644
--- a/src/pylorax/installtree.py
+++ b/src/pylorax/installtree.py
@@ -521,7 +521,11 @@ class LoraxInstallTree(BaseLoraxClass):
                                 stdin=find.stdout, stdout=subprocess.PIPE,
                                 preexec_fn=chdir)
 
-        compressed = subprocess.Popen([type, "-%s" % speed], stdin=cpio.stdout,
+        cmd = [type, "-%s" % speed]
+        if type == "xz":
+            cmd.append("--check=crc32")
+
+        compressed = subprocess.Popen(cmd, stdin=cpio.stdout,
                                       stdout=open(initrd.fpath, "wb"))
 
         logger.debug("compressing")
-- 
1.7.3.2

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