feat: cascading channel updates in release.yml

stable → all channels, rc → rc+below, beta → beta+below, etc.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.github/workflows/release.yml

@@ -375,6 +375,7 @@ jobs:
             exit 0
           fi
 
+          # Cascading channels: each stability updates itself and all lower levels
           export PY_STABILITY="$STABILITY" PY_VERSION="$VERSION" PY_SHA256="$SHA256" \
                  PY_ZIP_NAME="$ZIP_NAME" PY_TAG="$TAG" PY_DATE="$DATE" \
                  PY_GITEA_ORG="$GITEA_ORG" PY_GITEA_REPO="$GITEA_REPO"
@@ -390,73 +391,53 @@ jobs:
           gitea_org  = os.environ["PY_GITEA_ORG"]
           gitea_repo = os.environ["PY_GITEA_REPO"]
 
-          # Map stability to the <tag> value in updates.xml
-          tag_map = {
-              "development": "development",
-              "alpha": "alpha",
-              "beta": "beta",
-              "rc": "rc",
-              "stable": "stable",
+          # Cascade map: each level updates itself + all lower levels
+          cascade = {
+              "stable": ["development", "alpha", "beta", "rc", "stable"],
+              "rc": ["development", "alpha", "beta", "rc"],
+              "beta": ["development", "alpha", "beta"],
+              "alpha": ["development", "alpha"],
+              "development": ["development"],
           }
-          xml_tag = tag_map.get(stability, "development")
+          targets = cascade.get(stability, [stability])
 
           with open("updates.xml", "r") as f:
               content = f.read()
 
-          # Build regex to find the specific <update> block for this stability tag
-          # Use negative lookahead to avoid matching across multiple <update> blocks
-          block_pattern = r"(<update>(?:(?!</update>).)*?<tag>" + re.escape(xml_tag) + r"</tag>.*?</update>)"
-          match = re.search(block_pattern, content, re.DOTALL)
-
-          if not match:
-              print(f"No <update> block found for <tag>{xml_tag}</tag>")
-              exit(0)
-
-          block = match.group(1)
-          original_block = block
-
-          # Update version
-          block = re.sub(r"<version>[^<]*</version>", f"<version>{version}</version>", block)
-
-          # Update creation date
-          block = re.sub(r"<creationDate>[^<]*</creationDate>", f"<creationDate>{date}</creationDate>", block)
-
-          # Update or add SHA-256
-          if "<sha256>" in block:
-              block = re.sub(r"<sha256>[^<]*</sha256>", f"<sha256>{sha256}</sha256>", block)
-          else:
-              block = block.replace("</downloads>", f"</downloads>\n    <sha256>{sha256}</sha256>")
-
-          # Update Gitea download URL
           gitea_url = f"https://git.mokoconsulting.tech/{gitea_org}/{gitea_repo}/releases/download/{tag}/{zip_name}"
-          block = re.sub(
-              r"(<downloadurl[^>]*>)https://git\.mokoconsulting\.tech/[^<]*(</downloadurl>)",
-              rf"\g<1>{gitea_url}\g<2>",
-              block
-          )
 
-          # Update GitHub download URL only for RC and stable (others are Gitea-only)
-          if stability in ("rc", "stable"):
-              gh_url = f"https://github.com/mokoconsulting-tech/{gitea_repo}/releases/download/{tag}/{zip_name}"
+          for xml_tag in targets:
+              block_pattern = r"(<update>(?:(?!</update>).)*?<tag>" + re.escape(xml_tag) + r"</tag>.*?</update>)"
+              match = re.search(block_pattern, content, re.DOTALL)
+
+              if not match:
+                  print(f"No block for <tag>{xml_tag}</tag> — skipping")
+                  continue
+
+              block = match.group(1)
+              original = block
+
+              block = re.sub(r"<version>[^<]*</version>", f"<version>{version}</version>", block)
+              block = re.sub(r"<creationDate>[^<]*</creationDate>", f"<creationDate>{date}</creationDate>", block)
+
+              if "<sha256>" in block:
+                  block = re.sub(r"<sha256>[^<]*</sha256>", f"<sha256>{sha256}</sha256>", block)
+              else:
+                  block = block.replace("</downloads>", f"</downloads>\n    <sha256>{sha256}</sha256>")
+
               block = re.sub(
-                  r"(<downloadurl[^>]*>)https://github\.com/[^<]*(</downloadurl>)",
-                  rf"\g<1>{gh_url}\g<2>",
-                  block
-              )
-          else:
-              # Remove any GitHub download URL for dev/alpha/beta
-              block = re.sub(
-                  r"\n\s*<downloadurl[^>]*>https://github\.com/[^<]*</downloadurl>",
-                  "",
+                  r"(<downloadurl[^>]*>)https://git\.mokoconsulting\.tech/[^<]*(</downloadurl>)",
+                  rf"\g<1>{gitea_url}\g<2>",
                   block
               )
 
-          content = content.replace(original_block, block)
+              content = content.replace(original, block)
+              print(f"Updated {xml_tag} channel")
 
           with open("updates.xml", "w") as f:
               f.write(content)
 
-          print(f"Updated {xml_tag} channel: version={version}, sha={sha256[:16]}..., date={date}")
+          print(f"Cascaded {stability} → {', '.join(targets)}: v={version}, sha={sha256[:16]}...")
           PYEOF
 
       - name: "Commit updates.xml to current branch and main"