ALBS-97: Build AlmaLinux PPC64le repos and ISOs with pungi

- Scripts `create_packages_json` & `gather_modules` can process lzma compressed yaml files
- Script `create_package_json` can use repodata there are packages with different
  arch by compare with passed to the script

@BS-NOBUILD
@BS-TARGET-CL8

Change-Id: Ia9a3bacfa4344f0cf33b9f416649fd4a5f8d3c37

pungi/scripts/create_packages_json.py

@@ -9,6 +9,7 @@ https://github.com/rpm-software-management/createrepo_c/blob/master/examples/pyt
 import argparse
 import gzip
 import json
+import lzma
 import os
 import re
 import tempfile
@@ -24,6 +25,7 @@ import yaml
 from createrepo_c import Package
 from dataclasses import dataclass
 
+from .gather_modules import is_gzip_file, is_xz_file
 
 @dataclass
 class RepoInfo:
@@ -153,8 +155,9 @@ class PackagesGenerator:
             warningcb=self._warning_callback,
         )
 
-    @staticmethod
+    @classmethod
     def _parse_modules_file(
+            cls,
             modules_file_path: AnyStr,
 
     ) -> List[Dict]:
@@ -163,10 +166,15 @@ class PackagesGenerator:
         :param modules_file_path: path to local modules.yaml.gz
         :return: List of dict for an each modules in a repo
         """
+
         with open(modules_file_path, 'rb') as modules_file:
-            uncompressed_data = gzip.decompress(modules_file.read())
+            data = modules_file.read()
+            if is_gzip_file(data[:2]):
+                data = gzip.decompress(data)
+            elif is_xz_file(data[:2]):
+                data = lzma.decompress(data)
             return yaml.load_all(
-                uncompressed_data,
+                data,
                 Loader=yaml.BaseLoader,
             )
 
@@ -273,6 +281,15 @@ class PackagesGenerator:
         )
         all_packages = defaultdict(lambda: {'variants': list()})
         for repo_info in self.repos:
+            repo_arches = [
+                repo_info.arch,
+                'noarch',
+            ]
+            if repo_info.arch == 'x86_64':
+                repo_arches.extend([
+                    'i686',
+                    'i386',
+                ])
             packages = {}  # type: Dict[AnyStr, cr.Package]
             repomd_records = self._get_repomd_records(
                 repo_info=repo_info,
@@ -283,7 +300,11 @@ class PackagesGenerator:
                 packages=packages,
             )
             for package in packages.values():
-                package_key = f'{package.name}.{package.arch}'
+                if package.arch not in repo_arches:
+                    package_arch = repo_info.arch
+                else:
+                    package_arch = package.arch
+                package_key = f'{package.name}.{package_arch}'
                 if 'module' in package.release and not any(
                         re.search(included_package, package.name)
                         for included_package in self.included_packages
@@ -319,10 +340,22 @@ class PackagesGenerator:
                     )
 
         for package_dict in all_packages.values():
+            repo_arches = [
+                package_dict['arch'],
+                'noarch',
+            ]
+            if package_dict['arch'] == 'x86_64':
+                repo_arches.extend([
+                    'i686',
+                    'i386',
+                ])
             for variant in package_dict['variants']:
                 repo_arch = package_dict['arch']
                 package = package_dict['package']
                 package_name = package.name
+                if package.arch not in repo_arches:
+                    package_arch = package_dict['arch']
+                else:
                     package_arch = package.arch
                 if any(re.search(excluded_package, package_name)
                        for excluded_package in self.excluded_packages):

pungi/scripts/gather_modules.py

@@ -1,4 +1,6 @@
+import binascii
 import gzip
+import lzma
 import os
 from argparse import ArgumentParser, FileType
 from io import BytesIO
@@ -10,6 +12,24 @@ import createrepo_c as cr
 from typing.io import BinaryIO
 
 
+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 grep_list_of_modules_yaml_gz(repo_path: AnyStr) -> List[BytesIO]:
     """
     Find all of valid *modules.yaml.gz in repos
@@ -47,7 +67,11 @@ def collect_modules(modules_paths: List[BinaryIO], target_dir: str):
     os.makedirs(module_defaults_path, exist_ok=True)
 
     for module_file in modules_paths:
-        data = gzip.decompress(module_file.read())
+        data = module_file.read()
+        if is_gzip_file(data[:2]):
+            data = gzip.decompress(data)
+        elif is_xz_file(data[:2]):
+            data = lzma.decompress(data)
         documents = yaml.load_all(data, Loader=yaml.BaseLoader)
         for doc in documents:
             if doc['document'] == 'modulemd-defaults':