.github/workflows/schedule_snapshot_release.yml

name: Schedule snapshot release

on:
  schedule:
    - cron: '0 10,22 * * *'

  workflow_dispatch:

jobs:
  tag_release:
    name: "Tag snapshot release"
    runs-on: ubuntu-18.04
    steps:
      - name: Checking out repository
        uses: actions/checkout@v2
        with:
          token: ${{ secrets.GITHUB_WRITE_ACCESS_TOKEN }}

      - name: Compute version
        run: |
          git fetch --depth=1 origin +refs/tags/*:refs/tags/*
          package_version="$(printf '%(%Y%m%d)T.${{ github.run_number }}')"
          tag_name="snapshot-${package_version}"
          echo "package_version=${package_version}" >> $GITHUB_ENV
          echo "tag_name=${tag_name}" >> $GITHUB_ENV

      - name: Updating snapshot tag
        run: |
          git tag "${tag_name}"

      - name: Pushing changes
        uses: ad-m/github-push-action@v0.6.0
        with:
          github_token: ${{ secrets.GITHUB_WRITE_ACCESS_TOKEN }}
          branch: main
          tags: true

      - name: Create Release
        id: create_release
        uses: actions/create-release@v1
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_WRITE_ACCESS_TOKEN }}
        with:
          tag_name: ${{ env.tag_name }}
          release_name: iree snapshot ${{ env.tag_name }}
          body: |
            Automatic snapshot release of iree.
          draft: true
          prerelease: true

      - name: "Invoke workflow :: Build Native Release Packages"
        uses: benc-uk/workflow-dispatch@v1
        with:
          workflow: Build Native Release Packages
          token: ${{ secrets.GITHUB_WRITE_ACCESS_TOKEN }}
          ref: "${{ env.tag_name }}"
          inputs: '{"package_suffix": "-snapshot", "package_version": "${{ env.package_version }}", "release_id": "${{ steps.create_release.outputs.id }}"}'