publish.yaml

name: CI

on: 
  pull_request:

jobs:
  publish:
    runs-on: ubuntu-latest
    steps:
      - name: Decision to Publish
        id: decisions
        run: |
          # Secrets cannot be used in conditionals, so this is our dance:
          # https://github.com/actions/runner/issues/520
          if [[ -n "${{ secrets.SNAPCRAFT_STORE_CREDENTIALS }}" ]]; then
            echo PUBLISH=true >> $GITHUB_OUTPUT
          else
            echo PUBLISH= >> $GITHUB_OUTPUT
          fi

      - if: steps.decisions.outputs.PUBLISH == 'true'
        name: Checkout Snapcraft
        uses: actions/checkout@v3
        with:
          # Fetch all of history so Snapcraft can determine its own version from git.
          fetch-depth: 0

      - if: steps.decisions.outputs.PUBLISH == 'true'
        uses: snapcore/action-build@v1
        name: Build Snapcraft Snap
        id: build
        with:
          snapcraft-channel: latest/candidate

      - if: steps.decisions.outputs.PUBLISH == 'true'
        name: Verify Snapcraft Snap
        run: |
          # Make sure it is installable.
          sudo snap install --dangerous --classic ${{ steps.build.outputs.snap }}

      - if: steps.decisions.outputs.PUBLISH == 'true' && github.event_name == 'pull_request'
        # Use this until snapcore/action-publish#27 it is merged.
        uses: sergiusens/action-publish@master
        env:
          SNAPCRAFT_STORE_CREDENTIALS: ${{ secrets.SNAPCRAFT_STORE_CREDENTIALS }}
        with:
          snap: ${{ steps.build.outputs.snap }}
          release: edge/pr-${{ github.event.number }}