# 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:
    paths:
      - 'pkg/arvo/**'
      - 'pkg/docker-image/**'
      - 'pkg/ent/**'
      - 'pkg/ge-additions/**'
      - 'pkg/libaes_siv/**'
      - 'pkg/urbit/**'
      - 'pkg/urcrypt/**'
      - 'bin/**'
      - 'nix/**'
      - default.nix
  pull_request:
    paths:
      - '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_name == 'next/vere' && github.ref_type == 'branch') }}

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 }}

      - run: nix-build -A urbit --arg enableStatic true

      - 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: ${{ env.DO_UPLOAD == 'true' }}
        # XX how to get the nix-store path from the previous step without "rebuilding" it?
        run: |
          result="$(nix-build -A urbit --arg enableStatic true)"
          version="$(cat ./pkg/urbit/version)"
          system="$(nix-instantiate --eval --expr 'builtins.currentSystem')"
          system=${system:1:${#system}-2}
          target="gs://bootstrap.urbit.org/ci/vere/often/${GITHUB_SHA:0:9}/vere-v${version}-${system}"

          gsutil cp -n $result/bin/urbit "$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