Set title and description written in line-openapi PR (#1494)

line/line-openapi#74

Author: Yang-33

.github/workflows/generate-code.yml

@@ -24,6 +24,7 @@ jobs:
           distribution: 'temurin'
           java-version: 17
           architecture: x64
+      - uses: actions/setup-node@v4
       - name: Generate code
         run: |
           python generate-code.py
@@ -39,14 +40,30 @@ jobs:
       ## Run if diff exists and event is not pull request, and make PR
       - if: ${{ github.event_name != 'pull_request' && env.DIFF_IS_EMPTY != 'true' }}
         run: |
+          BRANCH_NAME="update-diff-${{ env.CURRENT_DATETIME }}"
+
           git config user.name github-actions
           git config user.email github-actions@github.com
-          git checkout -b update-diff-${{ env.CURRENT_DATETIME }}
+          git checkout -b $BRANCH_NAME
 
           git add .
           git commit -m "Code are generated by openapi generator"
-          git push origin update-diff-${{ env.CURRENT_DATETIME }}
 
-          gh pr create -B ${{ github.ref_name }} -t "Codes are generated by openapi generator" -b "" --label "line-openapi-update"
+          git push origin $BRANCH_NAME
+
+          # Determine PR title and body
+          if [ "$CHANGE_TYPE" == "submodule-update" ]; then
+            # Fetch PR info from submodule
+            npx zx ./line-openapi/tools/get-pr-info.mjs
+            PR_INFO=$(cat pr_info.json)
+            TITLE=$(echo "$PR_INFO" | jq -r '.title')
+            BODY=$(echo "$PR_INFO" | jq -r '.url')$'\n\n'$(echo "$PR_INFO" | jq -r '.body')
+          else
+            # Default PR title and body
+            TITLE="Codes are generated by openapi generator"
+            BODY="⚠Reviewer: Please edit this description to include relevant information about the changes.⚠"
+          fi
+
+          gh pr create -B ${{ github.ref_name }} -H $BRANCH_NAME -t "$TITLE" -b "$BODY" --label "line-openapi-update"
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}