GoでGitの差分だけFmt,Test,Lintを走らせて高速化する

.PHONY: help
help: ## 使い方(運用が増えるとmakeコマンド多くなるので、確認出来るように付けておくと便利)
	@awk 'BEGIN {FS = ":.*?## "} /^[a-zA-Z_-]+:.*?## / {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}' $(MAKEFILE_LIST)

.PHONY: dtest
dtest: ## 差分testの実行
	go test -v `$(call diff) | xargs -I{} echo ./{}`

.PHONY: dfmt
dfmt: ## 差分fmtの実行
	gofmt -s -w `$(call diff_files)`
	goimports -w -local "github.com/xx/xxx" `$(call diff)`

.PHONY: dlint
dlint: ## 差分lintの実行
	go mod download
	golangci-lint run -v -c .golangci.yml `$(call diff)`

# 変更差分のあるディレクトリを取得
define diff
git diff --name-only --diff-filter=ACMRT | grep .go$ | xargs -I{} dirname {} | sort | uniq
endef

$ make help
$ make dtest
$ make dfmt
$ make dlint

linters-settings:
  goimports:
    local-prefixes: "github.com/xx/xxx"
  gocritic:
    enabled-tags:
      - performance
  gosimple:
    go: "1.17"
  staticcheck:
    go: "1.17"
  stylecheck:
    go: "1.17"
  unused:
    go: "1.17"

linters:
  enable:
    - deadcode
    - typecheck
    - gofmt
    - goimports
    - gocritic
    - gosec
    - govet
    - errcheck
    - staticcheck
    - unused
    - gosimple
    - structcheck
    - varcheck
    - ineffassign

run:
  timeout: 30m
  skip-dirs:
    - pkg/xx
  skip-files:
    - "pkg/proto/.*\\.xx\\.go$"

issues:
  exclude-rules: [ ]

name: Pull Request Go Tester
on:
  pull_request:
    branches:
      - '**'
    paths:
      - 'cmd/**'
      - 'pkg/**'
jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - name: Set up Go 1.17
        uses: actions/setup-go@v3
        with:
          go-version: 1.17.8
        id: go
​
      - name: Checkout code
        uses: actions/checkout@v3
        with:
          # HEAD^ と HEADの差分をテストするため
          fetch-depth: 2
​
      - name: Cache Go Modules
        uses: actions/cache@v2
        id: cache
        with:
          path: ~/go/pkg/mod
          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
          restore-keys: |
            ${{ runner.os }}-go-
​
      - name: Download Modules
        if: steps.cache.outputs.cache-hit != 'true'
        run: go mod download
	
​      # masterブランチは通常通り全てのテストを走らせる
      - name: Test for master branch
        if: github.base_ref == 'master'
        run: go test -v `go list ./... | grep -v -e pkg/xxx`
​
      # それ以外のブランチは差分だけのテストを走らせる
      - name: Test for develop branch
        if: github.base_ref != 'master'
        run: go test -v `git diff --name-only --diff-filter=ACMRT ${{ github.sha }}^ ${{ github.sha }} | grep .go$ | xargs -I{} dirname {} | sort | uniq | xargs -I{} echo ./{}`
​

name: Pull Request Go Linter
on:
  pull_request:
    branches:
      - '**'
    paths:
      - 'cmd/**'
      - 'pkg/**'
jobs:
  lint:
    runs-on: ubuntu-latest
    env:
      GOGC: 50
    steps:
      - name: Set up Go 1.17
        uses: actions/setup-go@v3
        with:
          go-version: 1.17.8
        id: go

      - name: Checkout code
        uses: actions/checkout@v3
        with:
          # HEAD^ と HEADの差分をテストするため
          fetch-depth: 2

      # masterブランチは通常通り全てのテストを走らせる
      - name: golangci-lint for master branch
        if: github.base_ref == 'master'
        uses: golangci/golangci-lint-action@v3
        with:
          version: v1.44.2
          args: -v -c .golangci.yml cmd/... pkg/...
	  
      # それ以外のブランチは差分だけのテストを走らせる
      - name: golangci-lint for develop branch
        if: github.base_ref != 'master'
        uses: golangci/golangci-lint-action@v3
        with:
          version: v1.44.2
          args: -v -c .golangci.yml `git diff --name-only --diff-filter=ACMRT ${{ github.sha }}^ ${{ github.sha }} | grep .go$ | xargs -I{} dirname {} | sort | uniq`