name: Assign IDs

on:
  push:
    branches: master

jobs:
  assign-ids:
    name: Assign IDs
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v2

    - name: Cache cargo bin
      uses: actions/cache@v1
      with:
        path: ~/.cargo/bin
        key: rustsec-admin-v0.3.4

    - name: Install rustsec-admin
      run: |
        if [ ! -f $HOME/.cargo/bin/rustsec-admin ]; then
            cargo install rustsec-admin --vers 0.3.4
        fi

    - name: Assign IDs
      id: assign
      run: |
        message=$(rustsec-admin assign-id --github-actions-output)
        echo "::set-output name=commit_message::${message}"

    - name: Create duplicate ID assignment guard
      run: |
        echo "This file causes merge conflicts if two ID assignment jobs run concurrently." > .duplicate-id-guard
        echo "This prevents duplicate ID assignment due to a race between those jobs." >> .duplicate-id-guard
        ls -R . | sha256sum >> .duplicate-id-guard

    - name: Lint advisories
      run: rustsec-admin lint

    - name: Create pull request
      uses: peter-evans/create-pull-request@v3
      with:
        token: ${{ secrets.GITHUB_TOKEN }}
        commit-message: ${{ steps.assign.outputs.commit_message }}
        title: ${{ steps.assign.outputs.commit_message }}
        branch: assign-ids