name: Build
run-name: Build the game and save artifact
on:
  workflow_dispatch:
  push:
    branches: [ "main" ]
jobs:
  build:
    runs-on: ubuntu-latest
    steps:

      - name: install elan
        run: |
          set -o pipefail
          curl -sSfL https://github.com/leanprover/elan/releases/download/v3.0.0/elan-x86_64-unknown-linux-gnu.tar.gz | tar xz
          ./elan-init -y --default-toolchain none
          echo "$HOME/.elan/bin" >> $GITHUB_PATH

      - uses: actions/checkout@v4

      - name: print lean and lake versions
        run: |
          lean --version
          lake --version

        # Note: this would also happen in the lake post-update-hook
      - name: get mathlib cache
        continue-on-error: true
        run: |
          lake exe cache clean
          # We've been seeing many failures at this step recently because of network errors.
          # As a band-aid, we try twice.
          # The 'sleep 1' is small pause to let the network recover.
          lake exe cache get Game || (sleep 1; lake exe cache get Game)

      - name: create timestamp file
        run: touch tmp_timestamp

      - name: building game
        run: env LEAN_ABORT_ON_PANIC=1 lake build

      - name: delete unused mathlib cache
        continue-on-error: true
        run: find . -type d \( -name "*/.git" \) -delete -print && find ./.lake/ -type f \( -name "*.c" -o -name "*.hash" -o -name "*.trace" \) -delete -print && find ./.lake/ -type f \( -name "*.olean" \) \! -neweraa ./tmp_timestamp -delete -print

      - name: delete timestamp file
        run: rm ./tmp_timestamp

      - name: compress built game
        #run: tar -czvf ../game.tar.gz .
        run: zip game.zip * .lake/ .i18n/ -r

      - name: upload compressed game folder
        uses: actions/upload-artifact@v4
        with:
          name: build-for-server-import
          path: |
            game.zip

      - name: What next?
        run: echo "To export the game to the Game Server, open https://adam.math.hhu.de/import/trigger/${GITHUB_REPOSITORY,,} \n Afterwards, you can play the game at https://adam.math.hhu.de/#/g/${GITHUB_REPOSITORY,,}"