# This workflow is a collection of "quick checks" that should be reasonable
# to run for any new commit to this repository in principle.
#
# The main purpose of this workflow is to represent checks that we want to
# run prior to reviewing and merging a pull request. We should therefore aim
# for these checks to complete in no more than a few minutes in the common
# case.
#
# The build.yml workflow includes some additional checks we run only for
# already-merged changes to release branches and tags, as a compromise to
# keep the PR feedback relatively fast. The intent is that checks.yml should
# catch most problems but that build.yml might occasionally by the one to catch
# more esoteric situations, such as architecture-specific or OS-specific
# misbehavior.

name: Quick Checks

on:
  pull_request:
  push:
    branches:
      - main
      - 'v[0-9]+.[0-9]+'
      - checks-workflow-dev/*
    tags:
      - 'v[0-9]+.[0-9]+.[0-9]+*'

# This workflow runs for not-yet-reviewed external contributions and so it
# intentionally has no write access and only limited read access to the
# repository.
permissions:
  contents: read

jobs:
  unit-tests:
    name: "Unit Tests"
    runs-on: ubuntu-latest

    steps:
      - name: "Fetch source code"
        uses: actions/checkout@v2

      - name: Determine Go version
        id: go
        uses: ./.github/actions/go-version

      - name: Install Go toolchain
        uses: actions/setup-go@v2
        with:
          go-version: ${{ steps.go.outputs.version }}

      # NOTE: This cache is shared so the following step must always be
      # identical across the unit-tests, e2e-tests, and consistency-checks
      # jobs, or else weird things could happen.
      - name: Cache Go modules
        uses: actions/cache@v3
        with:
          path: "~/go/pkg"
          key: go-mod-${{ hashFiles('go.sum') }}
          restore-keys: |
            go-mod-

      - name: "Unit tests"
        run: |
          go test ./...

  race-tests:
    name: "Race Tests"
    runs-on: ubuntu-latest

    steps:
      - name: "Fetch source code"
        uses: actions/checkout@v2

      - name: Determine Go version
        id: go
        uses: ./.github/actions/go-version

      - name: Install Go toolchain
        uses: actions/setup-go@v2
        with:
          go-version: ${{ steps.go.outputs.version }}

      # NOTE: This cache is shared so the following step must always be
      # identical across the unit-tests, e2e-tests, and consistency-checks
      # jobs, or else weird things could happen.
      - name: Cache Go modules
        uses: actions/cache@v3
        with:
          path: "~/go/pkg"
          key: go-mod-${{ hashFiles('go.sum') }}
          restore-keys: |
            go-mod-

      # The race detector add significant time to the unit tests, so only run
      # it for select packages.
      - name: "Race detector"
        run: |
          go test -race ./internal/terraform ./internal/command ./internal/states

  e2e-tests:
    # This is an intentionally-limited form of our E2E test run which only
    # covers Terraform running on Linux. The build.yml workflow runs these
    # tests across various other platforms in order to catch the rare exception
    # that might leak through this.
    name: "End-to-end Tests"
    runs-on: ubuntu-latest

    steps:
      - name: "Fetch source code"
        uses: actions/checkout@v2

      - name: Determine Go version
        id: go
        uses: ./.github/actions/go-version

      - name: Install Go toolchain
        uses: actions/setup-go@v2
        with:
          go-version: ${{ steps.go.outputs.version }}

      # NOTE: This cache is shared so the following step must always be
      # identical across the unit-tests, e2e-tests, and consistency-checks
      # jobs, or else weird things could happen.
      - name: Cache Go modules
        uses: actions/cache@v3
        with:
          path: "~/go/pkg"
          key: go-mod-${{ hashFiles('go.sum') }}
          restore-keys: |
            go-mod-

      - name: "End-to-end tests"
        run: |
          TF_ACC=1 go test -v ./internal/command/e2etest

  consistency-checks:
    name: "Code Consistency Checks"
    runs-on: ubuntu-latest

    steps:
      - name: "Fetch source code"
        uses: actions/checkout@v2

      - name: Determine Go version
        id: go
        uses: ./.github/actions/go-version

      - name: Install Go toolchain
        uses: actions/setup-go@v2
        with:
          go-version: ${{ steps.go.outputs.version }}

      # NOTE: This cache is shared so the following step must always be
      # identical across the unit-tests, e2e-tests, and consistency-checks
      # jobs, or else weird things could happen.
      - name: Cache Go modules
        uses: actions/cache@v3
        with:
          path: "~/go/pkg"
          key: go-mod-${{ hashFiles('go.sum') }}
          restore-keys: |
            go-mod-

      - name: "go.mod and go.sum consistency check"
        run: |
          go mod tidy
          if [[ -n "$(git status --porcelain)" ]]; then
            echo >&2 "ERROR: go.mod/go.sum are not up-to-date. Run 'go mod tidy' and then commit the updated files."
            exit 1
          fi

      - name: Cache protobuf tools
        uses: actions/cache@v3
        with:
          path: "tools/protobuf-compile/.workdir"
          key: protobuf-tools-${{ hashFiles('tools/protobuf-compile/protobuf-compile.go') }}
          restore-keys: |
            protobuf-tools-

      - name: "Code consistency checks"
        run: |
          make fmtcheck generate staticcheck exhaustive protobuf
          if [[ -n "$(git status --porcelain)" ]]; then
            echo >&2 "ERROR: Generated files are inconsistent. Run 'make generate' and 'make protobuf' locally and then commit the updated files."
            git >&2 status --porcelain
            exit 1
          fi