ALBS-334: Make the ability of Pungi to give module_defaults from remote sources

pungi/scripts/create_packages_json.py

@@ -44,7 +44,6 @@ def is_xz_file(first_two_bytes):
         initial_bytes=b'fd37',
     )
 
-
 @dataclass
 class RepoInfo:
     # path to a directory with repo directories. E.g. '/var/repos' contains

pungi/scripts/gather_modules.py

@@ -1,4 +1,3 @@
-import binascii
 import gzip
 import lzma
 import os
@@ -13,29 +12,11 @@ import yaml
 import createrepo_c as cr
 from typing.io import BinaryIO
 
-from .create_packages_json import PackagesGenerator
+from .create_packages_json import PackagesGenerator, is_gzip_file, is_xz_file
 
 EMPTY_FILE = '.empty'
 
 
-def _is_compressed_file(first_two_bytes: bytes, initial_bytes: bytes):
-    return binascii.hexlify(first_two_bytes) == initial_bytes
-
-
-def is_gzip_file(first_two_bytes):
-    return _is_compressed_file(
-        first_two_bytes=first_two_bytes,
-        initial_bytes=b'1f8b',
-    )
-
-
-def is_xz_file(first_two_bytes):
-    return _is_compressed_file(
-        first_two_bytes=first_two_bytes,
-        initial_bytes=b'fd37',
-    )
-
-
 def read_modules_yaml(modules_yaml_path: Union[str, Path]) -> BytesIO:
     with open(modules_yaml_path, 'rb') as fp:
         return BytesIO(fp.read())