# Notes:
#
#   jobs.<job_id>
#
#     A seperate job id results in a lot of duplication of nix/cachix work.
#     The build will have to download any substituted derivations from cachix
#     for the steps with each distinct job id and upload built derivations to
#     cachix after each job has completed, either succesfully or on failure.
#
#   jobs.<job_id>.steps.run
#
#     build + test are distinct as each step entry results in a collapsable title
#     within the log output, which makes it easier to view failing builds or
#     tests independently.
#
#   jobs.<job_id>.strategy.fail-fast
#
#     Set to false so developers working on vere or king-haskell can have their
#     respective builds proceed without the other causing failure.
#
#   shell.nix
#
#     mkShell doesn't allow you to build it - so instantiate all the subshells
#     defined for the individual pkg/*/shell.nix as a sanity check and to create
#     some artefacts suitable for developers to pull from cachix. The top-level
#     shell.nix build time is dominated by Haskell dependencies so it's built as
#     part of the haskell build steps.
#
# Syntax:
#
#   https://docs.github.com/en/free-pro-team@latest/actions/reference/workflow-syntax-for-github-actions

name: build

on:
  push:
    tags: 'urbit-rc-v*'
    paths:
      - '.github/workflows/build.yml'
      - 'pkg/arvo/**'
      - 'pkg/docker-image/**'
      - 'pkg/ent/**'
      - 'pkg/ge-additions/**'
      - 'pkg/libaes_siv/**'
      - 'pkg/urbit/**'
      - 'pkg/urcrypt/**'
      - 'bin/**'
      - 'nix/**'
      - default.nix
  pull_request:
    paths:
      - '.github/workflows/build.yml'
      - 'pkg/arvo/**'
      - 'pkg/docker-image/**'
      - 'pkg/ent/**'
      - 'pkg/ge-additions/**'
      - 'pkg/libaes_siv/**'
      - 'pkg/urbit/**'
      - 'pkg/urcrypt/**'
      - 'bin/**'
      - 'nix/**'
      - default.nix
  workflow_dispatch:
    inputs:
      upload:
        description: 'upload binaries to gcp'
        default: false
        required: false
        type: boolean

env:
  DO_UPLOAD: >-
    ${{
    inputs.upload ||
    (github.ref_type == 'tag' && startsWith(github.ref_name, 'urbit-rc-v')) ||
    (github.ref_name == 'next/vere' && github.ref_type == 'branch')
    }}
  UPLOAD_BASE: bootstrap.urbit.org/vere
  # make configureable for (pre-)release builds
  VERE_PACE: >-
    ${{
    (github.ref_type == 'tag' && startsWith(github.ref_name, 'urbit-rc-v')) &&
    'soon' || 'often'
    }}

jobs:
  urbit:
    strategy:
      fail-fast: false
      matrix:
        include:
          - { os: ubuntu-latest }
          - { os: macos-latest }

    runs-on: ${{ matrix.os }}

    steps:
      - uses: actions/checkout@v2

      # We only want the extra nix config on linux, where it is necessary
      # for the docker build. We don't want in on Mac, where it isn't but
      # it breaks the nix install. The two `if` clauses should be mutually
      # exclusive
      - uses: cachix/install-nix-action@v16
        with:
          extra_nix_config: |
            system-features = nixos-test benchmark big-parallel kvm
        if: ${{ matrix.os == 'ubuntu-latest' }}
      - uses: cachix/install-nix-action@v16
        if: ${{ matrix.os != 'ubuntu-latest' }}

      - uses: cachix/cachix-action@v10
        with:
          name: ares
          authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}

      - name: build static binary
        run: |
          nix-build -A urbit        \
            --arg enableStatic true \
            --argstr verePace ${{ env.VERE_PACE }} > ./urbit-derivation
          cat ./urbit-derivation
          echo -n "urbit_static=" >> $GITHUB_ENV
          cat ./urbit-derivation >> $GITHUB_ENV
          cat ./urbit-derivation

      - name: confirm binary is mostly static
        if: matrix.os == 'macos-latest'
        run: |
          bin="${{ env.urbit_static }}/bin/urbit"

          if [ ! -f "$bin" ]; then
            echo "no binary at $bin"
            exit 1;
          fi

          libs="$(otool -L "${{ env.urbit_static }}/bin/urbit" | tail -n +2)"

          #  XX CoreFoundation?
          if [ -z "$(echo "$libs" | grep -v libSystem)" ]; then
            echo "it's mostly static"
            echo "$libs"
            exit 0
          else
            echo "dynamic links found:"
            echo "$libs"
            exit 1
          fi

      - uses: google-github-actions/setup-gcloud@v0.2.0
        if: env.DO_UPLOAD == 'true'
        with:
          version: '290.0.1'
          service_account_key: ${{ secrets.GCS_SERVICE_ACCOUNT_KEY }}
          project_id: ${{ secrets.GCS_PROJECT }}
          export_default_credentials: true

      - name: upload binary to bootstrap.urbit.org
        if: env.DO_UPLOAD == 'true'
        run: |
          if [ "once" -ne "$VERE_PACE" ]; then
            version="$(cat ./pkg/urbit/version)"
          else
            version="${GITHUB_SHA:0:9}"
          fi

          system="$(nix-instantiate --eval --expr 'builtins.currentSystem')"
          system=${system:1:${#system}-2}
          target="gs://${UPLOAD_BASE}/${VERE_PACE}/${version}/vere-v${version}-${system}"

          gsutil cp -n "${{ env.urbit_static }}/bin/urbit" "$target"
          exitcode=$?

          test $exitcode -eq 0 &&
            echo "upload to $target complete." ||
            echo "upload to $target failed.";
          exit $exitcode

      - if: ${{ matrix.os == 'ubuntu-latest' }}
        run: nix-build -A urbit-tests

      - if: ${{ matrix.os == 'ubuntu-latest' }}
        run: nix-build -A docker-image

  mingw:
    runs-on: windows-latest
    defaults:
      run:
        shell: >
          C:\msys64\msys2_shell.cmd -mingw64 -defterm -no-start -here -c
          ". <(cygpath '{0}')"
        working-directory: ./pkg/urbit

    steps:
      - uses: actions/checkout@v2
        with:
          lfs: true

      # echo suppresses pacman prompt
      - run: echo|./configure
        env:
          CACHIX_CACHE: ares
          CACHIX_AUTH_TOKEN: ${{ secrets.CACHIX_AUTH_TOKEN }}

      - run: mingw32-make build/urbit
      - run: >
          build/urbit -l -d -B ../../bin/solid.pill -F bus &&
          curl -f --data '{"source":{"dojo":"+hood/exit"},"sink":{"app":"hood"}}'
          http://localhost:12321

      - name: confirm binary is mostly static
        run: |
          if [ -z "$(ldd build/urbit | grep -vi "windows/system32")"]; then
            echo "it's mostly static"
            exit 0
          else
            echo "dynamic links found:"
            ldd build/urbit
            exit 1
          fi

      - uses: actions/setup-python@v2
        if: env.DO_UPLOAD == 'true'
        with:
          python-version: 3.7

      - uses: google-github-actions/setup-gcloud@v0.6.0
        if: env.DO_UPLOAD == 'true'
        env:
          # see https://github.com/google-github-actions/setup-gcloud/issues/100
          CLOUDSDK_PYTHON: ${{env.pythonLocation}}\python.exe
        with:
          service_account_key: ${{ secrets.GCS_SERVICE_ACCOUNT_KEY }}
          project_id: ${{ secrets.GCS_PROJECT }}
          export_default_credentials: true

      - name: upload binary to bootstrap.urbit.org
        if: env.DO_UPLOAD == 'true'
        env:
          CLOUDSDK_PYTHON: ${{env.pythonLocation}}\python.exe
        shell: bash
        run: |
          if [ "once" -ne "$VERE_PACE" ]; then
            version="$(cat ./pkg/urbit/version)"
          else
            version="${GITHUB_SHA:0:9}"
          fi

          system="x86_64-windows"
          target="gs://${UPLOAD_BASE}/${VERE_PACE}/${version}/vere-v${version}-${system}.exe"

          gsutil cp -n ./build/urbit.exe "$target"
          exitcode=$?

          test $exitcode -eq 0 &&
            echo "upload to $target complete." ||
            echo "upload to $target failed.";
          exit $exitcode


  after:
    runs-on: ubuntu-latest
    needs: [urbit, mingw]
    # XX disabled due to missing storage.objects.delete access
    # if: false
    steps:
      - uses: google-github-actions/setup-gcloud@v0.2.0
        if: env.DO_UPLOAD == 'true'
        with:
          version: '290.0.1'
          service_account_key: ${{ secrets.GCS_SERVICE_ACCOUNT_KEY }}
          project_id: ${{ secrets.GCS_PROJECT }}
          export_default_credentials: true

      - name: update latest deployed version
        if: env.DO_UPLOAD == 'true'
        run: |
          if [ "once" -ne "$VERE_PACE" ]; then
            version="$(cat ./pkg/urbit/version)"
          else
            version="${GITHUB_SHA:0:9}"
          fi

          target="gs://${UPLOAD_BASE}/${VERE_PACE}/last"

          echo -n $version > ./last-version
          gsutil cp ./last-version "$target"
          exitcode=$?

          test $exitcode -eq 0 &&
            echo "upload to $target complete." ||
            echo "upload to $target failed.";
          exit $exitcode