ci.yml

name: CI

on:
  push:
    branches:
      - main
      - release-*
  pull_request: {}
  workflow_dispatch:
    inputs:
      version:
        description: Package version (e.g. v0.1.0)
        required: false

env:
  # Common versions
  GO_VERSION: '1.21.3'
  GOLANGCI_VERSION: 'v1.55.2'
  DOCKER_BUILDX_VERSION: 'v0.11.2'

  # These environment variables are important to the Crossplane CLI install.sh
  # script. They determine what version it installs.
  XP_CHANNEL: master   # TODO(negz): Pin to stable once v1.14 is released.
  XP_VERSION: current  # TODO(negz): Pin to a version once v1.14 is released.

  # This CI job will automatically push new builds to xpkg.upbound.io if the
  # XPKG_ACCESS_ID and XPKG_TOKEN secrets are set in the GitHub respository (or
  # organization) settings. Create a token at https://accounts.upbound.io.
  XPKG_ACCESS_ID: ${{ secrets.XPKG_ACCESS_ID }}

  # The package to push, without a version tag. The default matches GitHub. For
  # example xpkg.upbound.io/crossplane/function-template-go.
  # XPKG: xpkg.upbound.io/${{ github.repository}}
  XPKG: index.docker.io/steve/function-unit-test

  # The package version to push. The default is 0.0.0-gitsha.
  XPKG_VERSION: ${{ inputs.version }}

jobs:
  lint:
    runs-on: ubuntu-22.04
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Setup Go
        uses: actions/setup-go@v4
        with:
          go-version: ${{ env.GO_VERSION }}
          cache: false  # The golangci-lint action does its own caching.

      - name: Lint
        uses: golangci/golangci-lint-action@v3
        with:
          version: ${{ env.GOLANGCI_VERSION }}

  unit-test:
    runs-on: ubuntu-22.04
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Setup Go
        uses: actions/setup-go@v4
        with:
          go-version: ${{ env.GO_VERSION }}

      - name: Run Unit Tests
        run: go test -v -cover ./...

  # We want to build most packages for the amd64 and arm64 architectures. To
  # speed this up we build single-platform packages in parallel. We then upload
  # those packages to GitHub as a build artifact. The push job downloads those
  # artifacts and pushes them as a single multi-platform package. 
  build:
    runs-on: ubuntu-22.04
    strategy:
      fail-fast: true
      matrix:
        arch:
          - amd64
          - arm64
    steps:
      - name: Setup QEMU
        uses: docker/setup-qemu-action@v3
        with:
          platforms: all

      - name: Setup Docker Buildx
        uses: docker/setup-buildx-action@v3
        with:
          version: ${{ env.DOCKER_BUILDX_VERSION }}
          install: true

      - name: Checkout
        uses: actions/checkout@v4

      # We ask Docker to use GitHub Action's native caching support to speed up
      # the build, per https://docs.docker.com/build/cache/backends/gha/.
      - name: Build Runtime
        id: image
        uses: docker/build-push-action@v5
        with:
          context: .
          platforms: linux/${{ matrix.arch }}
          cache-from: type=gha
          cache-to: type=gha,mode=max
          target: image
          build-args:
            GO_VERSION=${{ env.GO_VERSION }}
          outputs: type=docker,dest=runtime-${{ matrix.arch }}.tar
      
      - name: Setup the Crossplane CLI
        run: "curl -sL https://raw.githubusercontent.com/crossplane/crossplane/master/install.sh | sh"

      - name: Build Package
        run: ./crossplane xpkg build --package-file=${{ matrix.arch }}.xpkg --package-root=package/ --embed-runtime-image-tarball=runtime-${{ matrix.arch }}.tar
      
      - name: Upload Single-Platform Package
        uses: actions/upload-artifact@v3
        with:
          name: packages
          path: "*.xpkg"
          if-no-files-found: error
          retention-days: 1

  # This job downloads the single-platform packages built by the build job, and
  # pushes them as a multi-platform package. We only push the package it the
  # XPKG_ACCESS_ID and XPKG_TOKEN secrets were provided.
  push:
    runs-on: ubuntu-22.04
    needs:
      - build
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Download Single-Platform Packages
        uses: actions/download-artifact@v3
        with:
          name: packages
          path: .

      - name: Setup the Crossplane CLI
        run: "curl -sL https://raw.githubusercontent.com/crossplane/crossplane/master/install.sh | sh"

      - name: Login to Dockerhub
        uses: docker/login-action@v3
        if: env.XPKG_ACCESS_ID != ''
        with:
          registry: index.docker.io
          username: ${{ secrets.XPKG_ACCESS_ID }}
          password: ${{ secrets.XPKG_TOKEN }}

      # If a version wasn't explicitly passed as a workflow_dispatch input we
      # default to version v0.0.0-<git-commit-date>-<git-short-sha>, for example
      # v0.0.0-20231101115142-1091066df799. This is a simple implementation of
      # Go's pseudo-versions: https://go.dev/ref/mod#pseudo-versions.
      - name: Set Default Multi-Platform Package Version
        if: env.XPKG_VERSION == ''
        run: echo "XPKG_VERSION=v0.0.0-$(date -d@$(git show -s --format=%ct) +%Y%m%d%H%M%S)-$(git rev-parse --short=12 HEAD)" >> $GITHUB_ENV

      - name: Push Multi-Platform Package to Upbound
        if: env.XPKG_ACCESS_ID != ''
        run: "./crossplane --verbose xpkg push --package-files $(echo *.xpkg|tr ' ' ,) ${{ env.XPKG }}:${{ env.XPKG_VERSION }}"