name: 'Tests: nvm install with set -e'

on:
  pull_request:
  push:
  workflow_dispatch:
    inputs:
      ref:
        description: 'git ref to use'
        required: false
        default: 'HEAD'

permissions:
  contents: read

jobs:
  matrix:
    permissions:
      contents: read
    runs-on: ubuntu-latest
    outputs:
      matrix: ${{ steps.matrix.outputs.matrix }}
    steps:
      - uses: actions/checkout@v6
        with:
          fetch-depth: 0
      - id: matrix
        run: |
          if [ "${{ github.event_name }}" == "workflow_dispatch" ] && [ -n "${{ github.event.inputs.ref }}" ]; then
            echo "matrix=\"[\"${{ github.event.inputs.ref }}\"]\"" >> $GITHUB_OUTPUT
          else
            TAGS="$((echo "HEAD" && git tag --sort=-v:refname --merged HEAD --format='%(refname:strip=2) %(creatordate:short)' | grep '^v' | while read tag date; do
              if [ "$(uname)" == "Darwin" ]; then
                timestamp=$(date -j -f "%Y-%m-%d" "$date" +%s)
                threshold=$(date -j -v-4y +%s)
              else
                timestamp=$(date -d "$date" +%s)
                threshold=$(date -d "4 years ago" +%s)
              fi
              if [ $timestamp -ge $threshold ]; then echo "$tag"; fi
            done) | xargs)"
            echo $TAGS
            TAGS_JSON=$(printf "%s\n" $TAGS | jq -R . | jq -sc .)
            echo "matrix=${TAGS_JSON}" >> $GITHUB_OUTPUT
          fi

  test:
    permissions:
      contents: read
    needs: [matrix]
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        ref: ${{ fromJson(needs.matrix.outputs.matrix) }}
        has-nvmrc:
          - 'no nvmrc'
          - 'nvmrc'
        shell-level:
          - 1 shlvl
          - 2 shlvls

    steps:
      - uses: actions/checkout@v6
      - name: resolve HEAD to sha
        run: |
          if [ '${{ matrix.ref }}' = 'HEAD' ]; then
            REF="$(git rev-parse HEAD)"
          else
            REF="${{ matrix.ref }}"
          fi
          echo "resolved ref: ${REF}"
          echo "ref="$REF"" >> $GITHUB_ENV
      - run: echo $- # which options are set
      - run: echo node > .nvmrc
        if: ${{ matrix.has-nvmrc == 'nvmrc' }}
      - run:  curl -I --compressed -v https://nodejs.org/dist/
      - name: 'install nvm'
        run: |
          set -e
          export NVM_INSTALL_VERSION="${ref}"
          curl -o- "https://raw.githubusercontent.com/nvm-sh/nvm/${ref}/install.sh" | bash
      # v0.40.0 with an .nvmrc present is expected to fail (https://github.com/nvm-sh/nvm/issues/3405):
      # the steps below tolerate failure for that combination, and the final step
      # turns the job red only if the expected failure did NOT happen.
      - name: nvm --version
        id: nvm-version
        continue-on-error: ${{ matrix.ref == 'v0.40.0' && matrix.has-nvmrc == 'nvmrc' }}
        run: |
          set +e
          . $NVM_DIR/nvm.sh && nvm --version
      - name: nvm install in 1 shell level, ${{ matrix.has-nvmrc }}
        id: install-1
        if: ${{ matrix.shell-level == '1 shlvl' }}
        continue-on-error: ${{ matrix.ref == 'v0.40.0' && matrix.has-nvmrc == 'nvmrc' }}
        run: |
          set -ex
          . $NVM_DIR/nvm.sh
          echo nvm.sh sourced
          nvm --version
          if [ '${{ matrix.has-nvmrc }}' == 'nvmrc' ]; then
            nvm install
          fi
      - name: nvm install in 2 shell levels, ${{ matrix.has-nvmrc }}
        id: install-2
        if: ${{ matrix.shell-level == '2 shlvls' }}
        continue-on-error: ${{ matrix.ref == 'v0.40.0' && matrix.has-nvmrc == 'nvmrc' }}
        run: |
          if [ '${{ matrix.has-nvmrc }}' == 'nvmrc' ]; then
            bash -c "set -ex && . $NVM_DIR/nvm.sh && echo nvm.sh sourced && nvm --version && nvm install"
          else
            bash -c "set -ex && . $NVM_DIR/nvm.sh && echo nvm.sh sourced && nvm --version"
          fi
      - name: 'confirm the expected failure happened (v0.40.0 + nvmrc)'
        if: ${{ matrix.ref == 'v0.40.0' && matrix.has-nvmrc == 'nvmrc' }}
        env:
          SOURCE_OUTCOME: ${{ steps.nvm-version.outcome }}
          INSTALL_1_OUTCOME: ${{ steps.install-1.outcome }}
          INSTALL_2_OUTCOME: ${{ steps.install-2.outcome }}
        run: |
          echo "nvm --version: ${SOURCE_OUTCOME}; install (1 shlvl): ${INSTALL_1_OUTCOME}; install (2 shlvls): ${INSTALL_2_OUTCOME}"
          if [ "${SOURCE_OUTCOME}" = 'failure' ] || [ "${INSTALL_1_OUTCOME}" = 'failure' ] || [ "${INSTALL_2_OUTCOME}" = 'failure' ]; then
            echo 'v0.40.0 failed as expected: https://github.com/nvm-sh/nvm/issues/3405'
          else
            echo '::error::v0.40.0 with an .nvmrc was expected to fail (https://github.com/nvm-sh/nvm/issues/3405), but every step succeeded. If v0.40.0 somehow works now, remove the expected-failure handling from this workflow.'
            exit 1
          fi

  finisher:
    permissions:
      contents: none
    runs-on: ubuntu-latest
    needs: [test]
    steps:
      - run: true