monthly.yml

on:
  workflow_dispatch:
  schedule:
    # 3:25 UTC (12:25 JST) on 1st day of every month
    - cron: '25 3 1 * *'

jobs:
  release:
    runs-on: ubuntu-latest
    steps:
      - name: Get Info
        id: get-info
        run: |
          set -Eeuo pipefail

          # Get current date
          echo ::set-output name=name::$(TZ=Asia/Tokyo date +%Y%m%d)

          # Get latest tag (without fetch/clone, thus a bit hacky)
          echo ::set-output name=tag_name::$(git ls-remote --tags --refs --sort='-version:refname' --exit-code \
                                                           "${{ github.server_url }}/${{ github.repository }}" \
                                                           '*T*.*' | \
                                             sed -ne '1s@.*refs/tags/@@p')
      - uses: softprops/action-gh-release@v1
        with:
          name: ${{ steps.get-info.outputs.name }}
          tag_name: ${{ steps.get-info.outputs.tag_name }}

permissions:
  contents: write