consolidate generate-sandboxes workflows into a single workflow and c…

…omposite action

.github/actions/generate-sandboxes-composite-action.yml

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+name: Generate and push sandboxes action
+description: This is a composite action that generates sandboxes and pushes them to the storybookjs/sandboxes repository
+
+inputs:
+  destination-branch:
+    description: The destination branch to generate sandboxes to in the storybookjs/sandboxes repository
+    required: true
+
+defaults:
+  run:
+    shell: bash
+    working-directory: ./code
+
+runs:
+  using: "composite"
+  steps:
+    - uses: actions/setup-node@v3
+      with:
+        node-version-file: ".nvmrc"
+
+    - name: Setup git user
+      run: |
+        git config --global user.name "storybook-bot"
+        git config --global user.email "[email protected]"
+
+    - name: Install dependencies
+      working-directory: ./scripts
+      env:
+        YARN_ENABLE_IMMUTABLE_INSTALLS: false
+      run: node --experimental-modules ./check-dependencies.js
+
+    - name: Compile Storybook libraries
+      run: yarn task --task compile --start-from=auto --no-link
+
+    - name: Publish to local registry
+      run: yarn local-registry --publish
+
+    - name: Run local registry
+      run: yarn local-registry --open &
+
+    - name: Wait for registry
+      run: yarn wait-on tcp:127.0.0.1:6001
+
+    - name: Generate
+      env:
+        CLEANUP_SANDBOX_NODE_MODULES: true
+      run: yarn generate-sandboxes --local-registry
+
+    - name: Publish
+      run: yarn publish-sandboxes --remote=https://storybook-bot:${{ secrets.PAT_STORYBOOK_BOT}}@github.com/storybookjs/sandboxes.git --push --branch=${{ inputs.destination-branch }}
+
+    - name: The job has failed
+      if: ${{ failure() || cancelled() }}
+      env:
+        DISCORD_WEBHOOK: ${{ secrets.DISCORD_MONITORING_URL }}
+      uses: Ilshidur/action-discord@master
+      with:
+        args: "The generation of sandboxes in the **${{ inputs.destination-branch }}** branch has failed. [View Run](https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }})"

.github/workflows/generate-sandboxes.yml

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+name: Generate and push sandboxes
+
+on:
+  schedule:
+    - cron: "2 2 */1 * *"
+  workflow_dispatch:
+  # To test fixes on push rather than wait for the scheduling, do the following:
+  # 1. Uncomment the lines below and add your branch.
+  # push:
+  #   branches:
+  #     - <your-branch-name>
+  # 2. Change the "ref" value to <your-branch-name> in the actions/checkout step below.
+  # 3. Comment out the whole "generate-main" job starting at line 26
+  # 3. 👉 DON'T FORGET TO UNDO STEP 2 AND 3 BEFORE YOU MERGE YOUR CHANGES!
+
+jobs:
+  generate-next:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: next
+      - uses: .github/actions/generate-sandboxes-composite-action.yml
+        with:
+          destination-branch: next
+  generate-main:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          ref: main
+      - uses: .github/actions/generate-sandboxes-composite-action.yml
+        with:
+          destination-branch: main