Adapt download.py to run as a package script

scripts/component_hash_update/src/component_hash_update/download.py

@@ -318,32 +318,36 @@ def download_hash(only_downloads: [str]) -> None:
         yaml.dump(data, checksums_yml)
         logger.info("Updated %s", CHECKSUMS_YML)
 
-parser = argparse.ArgumentParser(description=f"Add new patch versions hashes in {CHECKSUMS_YML}",
-                                 formatter_class=argparse.RawTextHelpFormatter,
-                                 epilog=f"""
- This script only lookup new patch versions relative to those already existing
- in the data in {CHECKSUMS_YML},
- which means it won't add new major or minor versions.
- In order to add one of these, edit {CHECKSUMS_YML}
- by hand, adding the new versions with a patch number of 0 (or the lowest relevant patch versions)
- and a hash value of 0.
- ; then run this script.
-
- Note that the script will try to add the versions on all
- architecture keys already present for a given download target.
-
- EXAMPLES:
-
- crictl_checksums:
-      ...
-    amd64:
-+     1.30.0: 0
-      1.29.0: d16a1ffb3938f5a19d5c8f45d363bd091ef89c0bc4d44ad16b933eede32fdcbb
-      1.28.0: 8dc78774f7cbeaf787994d386eec663f0a3cf24de1ea4893598096cb39ef2508"""
-
-)
-parser.add_argument('binaries', nargs='*', choices=downloads.keys(),
-                    help='if provided, only obtain hashes for these compoments')
-
-args = parser.parse_args()
-download_hash(args.binaries)
+
+def main():
+
+    logging.basicConfig(stream=sys.stdout, level=logging.INFO)
+    parser = argparse.ArgumentParser(description=f"Add new patch versions hashes in {CHECKSUMS_YML}",
+                                     formatter_class=argparse.RawTextHelpFormatter,
+                                     epilog=f"""
+     This script only lookup new patch versions relative to those already existing
+     in the data in {CHECKSUMS_YML},
+     which means it won't add new major or minor versions.
+     In order to add one of these, edit {CHECKSUMS_YML}
+     by hand, adding the new versions with a patch number of 0 (or the lowest relevant patch versions)
+     and a hash value of 0.
+     ; then run this script.
+
+     Note that the script will try to add the versions on all
+     architecture keys already present for a given download target.
+
+     EXAMPLES:
+
+     crictl_checksums:
+          ...
+        amd64:
+    +     1.30.0: 0
+          1.29.0: d16a1ffb3938f5a19d5c8f45d363bd091ef89c0bc4d44ad16b933eede32fdcbb
+          1.28.0: 8dc78774f7cbeaf787994d386eec663f0a3cf24de1ea4893598096cb39ef2508"""
+
+    )
+    parser.add_argument('binaries', nargs='*', choices=downloads.keys(),
+                        help='if provided, only obtain hashes for these compoments')
+
+    args = parser.parse_args()
+    download_hash(args.binaries)