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name: ⚔️ Check Merge Conflicts
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on:
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  # So that PRs touching the same files as the push are updated
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  push:
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  # So that the `dirtyLabel` is removed if conflicts are resolved
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  pull_request_target:
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    types: [synchronize]
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permissions:
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  contents: read
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  pull-requests: write
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jobs:
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  check-merge-conflicts:
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    name: ⚔️ Check Merge Conflicts
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    runs-on: ubuntu-latest
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    if: always()
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    steps:
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      - name: Mint App Token
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        id: app
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        # Create a GitHub App token
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        # https://github.com/marketplace/actions/create-github-app-token
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        uses: actions/create-github-app-token@fee1f7d63c2ff003460e3d139729b119787bc349 # v2
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        with:
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          app-id: ${{ vars.ST_BOT_APP_ID }}
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          private-key: ${{ secrets.ST_BOT_PRIVATE_KEY }}
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          owner: ${{ github.repository_owner }}
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      - name: Check Merge Conflicts
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        # Label Conflicting Pull Requests
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        # https://github.com/marketplace/actions/label-conflicting-pull-requests
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        uses: eps1lon/actions-label-merge-conflict@1df065ebe6e3310545d4f4c4e862e43bdca146f0 # v3.0.3
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        with:
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          dirtyLabel: '🚫 Merge Conflicts'
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          repoToken: ${{ steps.app.outputs.token }}
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          commentOnDirty: >
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            ⚠️ This PR has conflicts that need to be resolved before it can be merged.