chore(ci): And hopefully the final one

.github/workflows/propose_osc_changes.yml

@@ -8,7 +8,7 @@ permissions:
   contents: read
 
 jobs:
-  generate:
+  propose-osc-pr:
     if: github.event.pull_request.merged == true
     runs-on: ubuntu-latest
     steps:
@@ -50,29 +50,63 @@ jobs:
             uv run openstack-codegenerator --work-dir wrk --target rust-tui --metadata metadata/identity_metadata.yaml --service identity --resource ${resource}
           done;
 
-      - name: Set variables
-        id: vars
-        run: |
-          echo "branch_name=${GITHUB_HEAD_REF}" >> $GITHUB_OUTPUT
-          echo "pr_number=${{ github.event.pull_request.number }}" >> $GITHUB_OUTPUT
-
-      - name: Get commit message from merged PR
-        id: commit
-        env:
-          GH_TOKEN: ${{ github.token }}
-          PR_NUMBER: ${{ steps.vars.outputs.pr_number }}
-          REPO: ${{ github.repository }}
-        run: |
-          # Fetch all commits for the PR
-          RESPONSE=$(curl -s -H "Authorization: token $GH_TOKEN" \
-            "https://api.github.com/repos/$REPO/pulls/$PR_NUMBER/commits")
-
-          # Extract last commit message using jq
-          COMMIT_MESSAGE=$(echo "$RESPONSE" | jq -r '.[-1].commit.message')
-
-          echo "commit_message<<EOF" >> $GITHUB_OUTPUT
-          echo "$COMMIT_MESSAGE" >> $GITHUB_OUTPUT
-          echo "EOF" >> $GITHUB_OUTPUT
+        - name: Set PR variables 
+          id: vars
+          run: |
+            echo "pr_number=${{ github.event.pull_request.number }}" >> $GITHUB_OUTPUT
+            echo "branch_name=${{ github.event.pull_request.head.ref }}" >> $GITHUB_OUTPUT
+            echo "merge_sha=${{ github.event.pull_request.merge_commit_sha }}" >> $GITHUB_OUTPUT
+
+        - name: Resolve best commit message for the merged PR
+          id: commit
+          env:
+            GITHUB_TOKEN: ${{ github.token }}
+            PR_NUMBER: ${{ steps.vars.outputs.pr_number }}
+            REPO: ${{ github.repository }}
+            MERGE_SHA: ${{ steps.vars.outputs.merge_sha }}
+          run: |
+            set -euo pipefail
+            # helper to emit multi-line output
+            set_output() {
+                echo "commit_message<<'EOF'" >> $GITHUB_OUTPUT
+                printf "%s\n" "$1" >> $GITHUB_OUTPUT
+                echo "EOF" >> $GITHUB_OUTPUT
+            }
+
+            COMMIT_MSG=""
+            # 1) If merge_commit_sha exists, try to fetch that commit (works for merge & squash)
+            if [ -n "$MERGE_SHA" ] && [ "$MERGE_SHA" != "null" ]; then
+                echo "Attempting to fetch merge commit message for SHA: $MERGE_SHA"
+                RESP=$(curl -s -H "Authorization: token $GITHUB_TOKEN" \
+                    "https://api.github.com/repos/$REPO/commits/$MERGE_SHA")
+                COMMIT_MSG=$(echo "$RESP" | jq -r '.commit.message // empty' | sed 's/\r$//')
+            fi
+
+            # 2) Fallback: collect all commits on the PR and join their messages
+            if [ -z "$COMMIT_MSG" ]; then
+                echo "Falling back to collecting PR commits..."
+                RESP=$(curl -s -H "Authorization: token $GITHUB_TOKEN" \
+                    "https://api.github.com/repos/$REPO/pulls/$PR_NUMBER/commits")
+                COMMIT_MSG=$(echo "$RESP" | jq -r 'map(.commit.message) | join("\n\n---\n\n")' | sed 's/\r$//')
+            fi
+
+            # 3) Fallback: use PR title and body
+            if [ -z "$COMMIT_MSG" ]; then
+                echo "Falling back to PR title/body..."
+                RESP=$(curl -s -H "Authorization: token $GITHUB_TOKEN" \
+                    "https://api.github.com/repos/$REPO/pulls/$PR_NUMBER")
+                TITLE=$(echo "$RESP" | jq -r '.title // empty') BODY=$(echo "$RESP" | jq -r '.body // empty')
+                if [ -n "$TITLE" ] || [ -n "$BODY" ]; then
+                    COMMIT_MSG="$TITLE"$'\n\n'"$BODY"
+                fi
+            fi
+
+            # 4) Final fallback
+            if [ -z "$COMMIT_MSG" ]; then
+                COMMIT_MSG="Automated update from source repo (PR #$PR_NUMBER)"
+            fi
+
+            set_output "$COMMIT_MSG"
 
       - name: Clone target repository
         run: |
@@ -112,5 +146,5 @@ jobs:
             --repo gtema/openstack \
             --head "${{ steps.vars.outputs.branch_name }}" \
             --base main \
-            --title "${{ steps.vars.commit.commit_message }}" \
+            --title "${{ steps.commit.commit_message }}" \
             --body "Automated PR created after merging '${{ steps.vars.outputs.branch_name }}' in the gtema/keystone repo."