Feature/1681 reverse dependency lookup for deploy

.github/workflows/sync-milestone.yml

@@ -17,16 +17,17 @@ jobs:
           REPO: ${{ github.repository }}
           OWNER: ${{ github.repository_owner }}
         run: |
-          # 1. Get the milestone of the officially linked issues and the PR's current milestone via GraphQL
-          # This catches issues linked via "Fixes #123" and similar in the body or the UI sidebar.
+          # 1. Get milestones from ALL linked closing issues and the PR's current milestone via GraphQL.
+          #    closingIssuesReferences catches issues linked via "Fixes #123" and similar in the body or sidebar.
           API_RESPONSE=$(gh api graphql -f query='
             query($owner: String!, $name: String!, $pr: Int!) {
               repository(owner: $owner, name: $name) {
                 pullRequest(number: $pr) {
                   milestone {
                     number
+                    title
                   }
-                  closingIssuesReferences(first: 1) {
+                  closingIssuesReferences(first: 20) {
                     nodes {
                       milestone {
                         number
@@ -38,18 +39,43 @@ jobs:
               }
             }' -F owner="$OWNER" -F name="${REPO#*/}" -F pr=$PR_NUMBER)
 
-          MILESTONE_NUMBER=$(echo "$API_RESPONSE" | jq -r '.data.repository.pullRequest.closingIssuesReferences.nodes[0].milestone.number // "null"')
-          MILESTONE_TITLE=$(echo "$API_RESPONSE" | jq -r '.data.repository.pullRequest.closingIssuesReferences.nodes[0].milestone.title // "null"')
-          CURRENT_PR_MILESTONE=$(echo "$API_RESPONSE" | jq -r '.data.repository.pullRequest.milestone.number // "null"')
-
-          # 2. Check if a milestone was found
-          if [ "$MILESTONE_NUMBER" != "null" ] && [ -n "$MILESTONE_NUMBER" ]; then
-            if [ "$MILESTONE_NUMBER" = "$CURRENT_PR_MILESTONE" ]; then
-              echo "PR already has milestone '$MILESTONE_TITLE' set. No update needed."
-            else
-              echo "Found milestone '$MILESTONE_TITLE' from linked issue. Assigning to PR..."
-              gh pr edit $PR_NUMBER --milestone "$MILESTONE_TITLE" --repo "$REPO"
-            fi
-          else
-            echo "No milestone found on linked issues or no issues linked."
+          # 2. Collect all X.Y.Z milestone titles from linked issues, dedupe, version-sort, pick highest.
+          MILESTONE_TITLE=$(echo "$API_RESPONSE" \
+            | jq -r '.data.repository.pullRequest.closingIssuesReferences.nodes[].milestone.title // empty' \
+            | grep -E '^[0-9]+\.[0-9]+\.[0-9]+$' \
+            | sort -uV \
+            | tail -n1)
+
+          CURRENT_PR_MILESTONE_TITLE=$(echo "$API_RESPONSE" | jq -r '.data.repository.pullRequest.milestone.title // "null"')
+
+          # 3. No qualifying milestone found across all linked issues.
+          if [ -z "$MILESTONE_TITLE" ]; then
+            echo "No X.Y.Z milestone found on any linked issue. Nothing to sync."
+            exit 0
+          fi
+
+          # 4. PR already has that exact milestone title — nothing to do.
+          if [ "$MILESTONE_TITLE" = "$CURRENT_PR_MILESTONE_TITLE" ]; then
+            echo "PR already has milestone '$MILESTONE_TITLE' set. No update needed."
+            exit 0
+          fi
+
+          echo "Candidate milestone: '$MILESTONE_TITLE' (current PR milestone: '$CURRENT_PR_MILESTONE_TITLE')"
+
+          # 5. Confirm the milestone title exists as an OPEN milestone on this repo.
+          #    gh pr edit --milestone only accepts open milestones; closed ones return "not found".
+          REPO_MILESTONE_MATCH=$(gh api "repos/$REPO/milestones?per_page=100&state=open" --paginate \
+            | jq -r '.[].title' \
+            | grep -Fx "$MILESTONE_TITLE" || true)
+
+          if [ -z "$REPO_MILESTONE_MATCH" ]; then
+            echo "::warning::Milestone '$MILESTONE_TITLE' not found as an open milestone on $REPO (it may be closed or deleted). Skipping PR milestone update."
+            exit 0
+          fi
+
+          # 6. Assign milestone to PR — treat any failure as a warning, never fail the job.
+          echo "Assigning milestone '$MILESTONE_TITLE' to PR #$PR_NUMBER..."
+          if ! gh pr edit "$PR_NUMBER" --milestone "$MILESTONE_TITLE" --repo "$REPO"; then
+            echo "::warning::Failed to assign milestone '$MILESTONE_TITLE' to PR #$PR_NUMBER. Manual update may be needed."
           fi
+          exit 0