download_hash.py: support for 'multi-hash' file + runc

runc upstream does not provide one hash file per assets in their
releases, but one file with all the hashes.
To handle this (and/or any arbitrary format from upstreams), add a
dictionary mapping the name of the download to a lambda function which
transform the file provided by upstream into a dictionary of hashes,
keyed by architecture.

scripts/download_hash.py

@@ -34,8 +34,16 @@ def download_hash(minors):
  "kubeadm": "https://dl.k8s.io/release/{version}/bin/linux/{arch}/kubeadm.sha256",
  "kubectl": "https://dl.k8s.io/release/{version}/bin/linux/{arch}/kubectl.sha256",
  "kubelet": "https://dl.k8s.io/release/{version}/bin/linux/{arch}/kubelet.sha256",
- "runc": "https://github.com/opencontainers/runc/releases/download/{version}/runc.{arch}.sha256sum",
+ "runc": "https://github.com/opencontainers/runc/releases/download/{version}/runc.sha256sum",
  }
+ # Handle hashes not directly in one url per hash. Return dict of hashs indexed by arch
+ download_hash_extract = {
+ "runc": lambda hashes : {
+ parts[1].split('.')[1] : parts[0]
+ for parts in (line.split()
+ for line in hashes.split('\n')[3:9])
+ },
+ }
 
  data, yaml = open_checksums_yaml()
 
@@ -61,7 +69,13 @@ def download_hash(minors):
  print(f"Unable to find {download} hash file for version {version} (arch: {arch}) at {hash_file.url}")
  break
  hash_file.raise_for_status()
- sha256sum = hash_file.content.decode().split(' ')[0]
+ sha256sum = hash_file.content.decode()
+ if download in download_hash_extract:
+ sha256sum = download_hash_extract[download](sha256sum).get(arch)
+ if sha256sum == None:
+ break
+ sha256sum = sha256sum.split()[0]
+
  if len(sha256sum) != 64:
  raise Exception(f"Checksum has an unexpected length: {len(sha256sum)} (binary: {download}, arch: {arch}, release: {version}, checksum: '{sha256sum}')")
  data[checksum_name][arch][version] = sha256sum