Setup workflows for OpenAPI code generation

.github/workflows/generate-code.yml

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+name: Generate OpenAPI based code
+
+on:
+  workflow_dispatch:
+  pull_request:
+  push:
+    branches:
+      - master
+
+jobs:
+  tests:
+    name: Generate OpenAPI based code
+    runs-on: ubuntu-latest
+
+    steps:
+      # Setup
+      - uses: actions/checkout@v4
+        with:
+          submodules: recursive
+      - name: Update submodules
+        run: git submodule update --remote --recursive
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.x'
+      - name: Set up Java
+        uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: 17
+          architecture: x64
+      - name: Set up Node
+      - uses: actions/setup-node@v4
+        id: setup_node_id
+        with:
+          node-version: 18
+
+      # Generate codes
+      - name: Generate code
+        run: python3 generate-code.py
+      - run: |
+          diff=$(git --no-pager diff --name-only)
+          echo "DIFF_IS_EMPTY=$([[ -z "$diff" ]] && echo 'true' || echo 'false')" >> $GITHUB_ENV
+          echo "CURRENT_DATETIME=$(date +'%Y%m%d%H%M%S')" >> $GITHUB_ENV
+      ## Run if diff exists and pull request, and make CI status failure (but allow renovate bot)
+      - if: ${{ github.event_name == 'pull_request' && env.DIFF_IS_EMPTY != 'true' && github.actor != 'renovate[bot]' }}
+        run: |
+          echo "There are changes in the generated codes. Please run 'generate-code.py' and commit the changes." >&2
+          echo "The files with differences are as follows." >&2
+          echo "$(git --no-pager diff --name-only HEAD)" >&2
+          exit 1
+      ## Run if diff exists and event is not pull request, and make PR
+      - if: ${{ github.event_name != 'pull_request' && env.DIFF_IS_EMPTY != 'true' }}
+        run: |
+          # Determine Change Type via Submodule Script. This scripts read current uncommited changes.
+          CHANGE_TYPE=$(npx zx ./line-openapi/tools/determine-change-type.mjs)
+          echo "Determined change type: $CHANGE_TYPE"
+
+          # Determine PR title and body
+          if [ "$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
+
+          # Create PR
+          BRANCH_NAME="update-diff-${{ env.CURRENT_DATETIME }}"
+
+          git config user.name github-actions
+          git config user.email github-actions@github.com
+          git checkout -b $BRANCH_NAME
+
+          git add line-openapi
+          git add lib/**
+          git commit -m "Codes are generated by openapi"
+
+          git push origin $BRANCH_NAME
+
+          gh pr create -B ${{ github.ref_name }} -H $BRANCH_NAME -t "$TITLE" -b "$BODY" --label "line-openapi-update"
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

renovate.json5

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+  {
+    "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+    "extends": [
+      "config:recommended"
+    ],
+    "timezone": "Asia/Tokyo",
+    "automerge": true,
+    "platformAutomerge": true,
+    "git-submodules": {
+      "enabled": true
+    },
+    "labels": [
+      "dependency upgrade"
+    ],
+    "packageRules": [
+      {
+        "matchPackagePatterns": [
+          "line-openapi"
+        ],
+        "labels": [
+          "dependency upgrade",
+          "line-openapi-update"
+        ],
+        // In many cases, we would like to update line-openapi by dispatching the GitHub workflow during working
+        // hours, as there are code changes.
+        // If that is forgotten, there's a possibility that line-openapi updates or code changes won't happen at
+        // all, so we allow it to run at night just in case.
+        "schedule": [
+          "after 11pm",
+          "before 4am"
+        ]
+      },
+    ]
+  }