some new errors from buildifier

package_manager/dpkg_parser.py

@@ -119,11 +119,11 @@ def download_dpkg(package_files, packages, workspace_name, versionsfile):
             expected_checksum = pkg[SHA256_KEY]
             if actual_checksum != expected_checksum:
                 raise Exception("Wrong checksum for package %s %s (%s).  Expected: %s, Actual: %s" %(pkg_name, os.getcwd() + "/" + out_file, pkg[FILENAME_KEY], expected_checksum, actual_checksum))
-    with open(PACKAGE_MAP_FILE_NAME, 'w') as f:
+    with open(PACKAGE_MAP_FILE_NAME, 'w', encoding="utf-8") as f:
         f.write("packages = " + json.dumps(package_to_rule_map))
         f.write("\nversions = " + json.dumps(package_to_version_map))
     if versionsfile:
-        with open(versionsfile, 'w') as f:
+        with open(versionsfile, 'w', encoding="utf-8") as f:
             f.write(json.dumps(package_to_version_map, sort_keys=True, indent=4, separators=(',', ': ')))
             f.write('\n')
 
@@ -194,7 +194,7 @@ def download_package_list(mirror_url, distro, arch, snapshot, sha256, packages_u
         with lzma.open("Packages.xz", 'rb') as f:
             data = f.read()
     metadata = parse_package_metadata(data, mirror_url, snapshot, package_prefix)
-    with open(PACKAGES_FILE_NAME, 'w') as f:
+    with open(PACKAGES_FILE_NAME, 'w', encoding="utf-8") as f:
         json.dump(metadata, f)
 
 if __name__ == "__main__":

package_manager/util.py

@@ -61,7 +61,7 @@ def generate_os_release(distro, os_release_file):
 
 def build_os_release_tar(distro, os_release_file, os_release_path, tar_file_name):
     os.makedirs(os_release_path)
-    with open(os_release_file, 'w') as os_release:
+    with open(os_release_file, 'w', encoding="utf-8") as os_release:
         generate_os_release(distro, os_release)
     with TarFile(output=tar_file_name, directory=None, compression='', root_directory='./', default_mtime=0) as tar:
         tar.add_file(os_release_path, os_release_path, mode=0o644)