More uncompress related code will be added shortly, so having a
separate file makes more sense.

The utils.py imports the functions from archive.py, so that
existing callers don't need to be modified. This avoids
redundant code churn until later in the series when all
calls will be adapted for other reasons.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
---
 tests/functional/qemu_test/uncompress.py | 36 ++++++++++++++++++++++++
 tests/functional/qemu_test/utils.py      | 27 ++----------------
 2 files changed, 38 insertions(+), 25 deletions(-)
 create mode 100644 tests/functional/qemu_test/uncompress.py

diff --git a/tests/functional/qemu_test/uncompress.py b/tests/functional/qemu_test/uncompress.py
new file mode 100644
index 0000000000..955170df65
--- /dev/null
+++ b/tests/functional/qemu_test/uncompress.py
@@ -0,0 +1,36 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+#
+# Utilities for python-based QEMU tests
+#
+# Copyright 2024 Red Hat, Inc.
+#
+# Authors:
+#  Thomas Huth <thuth@redhat.com>
+
+import gzip
+import lzma
+import os
+import shutil
+
+
+def gzip_uncompress(gz_path, output_path):
+    if os.path.exists(output_path):
+        return
+    with gzip.open(gz_path, 'rb') as gz_in:
+        try:
+            with open(output_path, 'wb') as raw_out:
+                shutil.copyfileobj(gz_in, raw_out)
+        except:
+            os.remove(output_path)
+            raise
+
+def lzma_uncompress(xz_path, output_path):
+    if os.path.exists(output_path):
+        return
+    with lzma.open(xz_path, 'rb') as lzma_in:
+        try:
+            with open(output_path, 'wb') as raw_out:
+                shutil.copyfileobj(lzma_in, raw_out)
+        except:
+            os.remove(output_path)
+            raise
diff --git a/tests/functional/qemu_test/utils.py b/tests/functional/qemu_test/utils.py
index 5ce1c4388e..6b87af4414 100644
--- a/tests/functional/qemu_test/utils.py
+++ b/tests/functional/qemu_test/utils.py
@@ -8,13 +8,12 @@
 # This work is licensed under the terms of the GNU GPL, version 2 or
 # later.  See the COPYING file in the top-level directory.
 
-import gzip
-import lzma
 import os
-import shutil
 
 from .archive import tar_extract as archive_extract
 from .archive import cpio_extract
+from .uncompress import gzip_uncompress
+from .uncompress import lzma_uncompress
 
 """
 Round up to next power of 2
@@ -36,25 +35,3 @@ def image_pow2ceil_expand(path):
         if size != size_aligned:
             with open(path, 'ab+') as fd:
                 fd.truncate(size_aligned)
-
-def gzip_uncompress(gz_path, output_path):
-    if os.path.exists(output_path):
-        return
-    with gzip.open(gz_path, 'rb') as gz_in:
-        try:
-            with open(output_path, 'wb') as raw_out:
-                shutil.copyfileobj(gz_in, raw_out)
-        except:
-            os.remove(output_path)
-            raise
-
-def lzma_uncompress(xz_path, output_path):
-    if os.path.exists(output_path):
-        return
-    with lzma.open(xz_path, 'rb') as lzma_in:
-        try:
-            with open(output_path, 'wb') as raw_out:
-                shutil.copyfileobj(lzma_in, raw_out)
-        except:
-            os.remove(output_path)
-            raise
-- 
2.46.0