Develop

.devcontainer/devcontainer-lock.json

@@ -1,16 +1,16 @@
 {
   "features": {
-    "ghcr.io/devcontainers/features/dotnet:2": {
+    "ghcr.io/devcontainers/features/dotnet": {
       "version": "2.5.0",
       "resolved": "ghcr.io/devcontainers/features/dotnet@sha256:0fc16547ed4db6d7ff2a9f5981d2b93eb314e568affb9958029ad794f1f9a093",
       "integrity": "sha256:0fc16547ed4db6d7ff2a9f5981d2b93eb314e568affb9958029ad794f1f9a093"
     },
-    "ghcr.io/devcontainers/features/go:1": {
+    "ghcr.io/devcontainers/features/go": {
       "version": "1.3.4",
       "resolved": "ghcr.io/devcontainers/features/go@sha256:d85e921f91b41340055bb12b325d9d551170ed04b3b832e33530bf42f167c032",
       "integrity": "sha256:d85e921f91b41340055bb12b325d9d551170ed04b3b832e33530bf42f167c032"
     },
-    "ghcr.io/devcontainers/features/node:2": {
+    "ghcr.io/devcontainers/features/node": {
       "version": "2.1.0",
       "resolved": "ghcr.io/devcontainers/features/node@sha256:586c9a6f7dd40bd3ba2cd41e7f2f88dcc31fbe5d1442afcbf07ffbc66b686857",
       "integrity": "sha256:586c9a6f7dd40bd3ba2cd41e7f2f88dcc31fbe5d1442afcbf07ffbc66b686857"

.devcontainer/devcontainer.json

@@ -3,36 +3,31 @@
 {
 	"name": "Ubuntu",
 	// Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
-	"image": "mcr.microsoft.com/devcontainers/base:resolute",
+	"image": "mcr.microsoft.com/devcontainers/base:ubuntu",
 	"features": {
-		"ghcr.io/devcontainers/features/dotnet:2": {
+		"ghcr.io/devcontainers/features/dotnet": {
 			"tabCompletions": true,
 			"version": "latest"
 		},
-		"ghcr.io/devcontainers/features/go:1": {
+		"ghcr.io/devcontainers/features/go": {
 			"version": "latest"
 		},
-		"ghcr.io/devcontainers/features/node:2": {
+		"ghcr.io/devcontainers/features/node": {
 			"nodeGypDependencies": true,
 			"version": "lts",
 			"npmVersion": "lts",
 			"pnpmVersion": "latest",
 			"nvmVersion": "latest"
 		}
 	}
-
 	// Features to add to the dev container. More info: https://containers.dev/features.
 	// "features": {},
-
 	// Use 'forwardPorts' to make a list of ports inside the container available locally.
 	// "forwardPorts": [],
-
 	// Use 'postCreateCommand' to run commands after the container is created.
 	// "postCreateCommand": "uname -a",
-
 	// Configure tool-specific properties.
 	// "customizations": {},
-
 	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
 	// "remoteUser": "root"
-}
+}

.github/actions/setup-playwright/action.yaml

@@ -20,7 +20,7 @@ runs:
         echo "PLAYWRIGHT_VERSION=$PLAYWRIGHT_VERSION" >> $GITHUB_OUTPUT
 
     - name: Cache Playwright with deps
-      uses: actions/cache@v4
+      uses: actions/cache@v6
       with:
         path: ~/.cache/ms-playwright
         key: playwright-${{ steps.version.outputs.PLAYWRIGHT_VERSION }}

.github/dependabot.yml

@@ -0,0 +1,16 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file
+
+version: 2
+updates:
+  - package-ecosystem: "devcontainers" # See documentation for possible values
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "weekly"
+
+  - package-ecosystem: "github-actions" 
+    directory: "/" 
+    schedule:
+      interval: "weekly"

.github/workflows/chapter-1-go.yaml → .github/workflows/chapter-1-hello.yaml

@@ -1,6 +1,6 @@
 # Chapter 1 Hello World、ワークフローの定義ファイルの書き方.
 ---
-name: Chapter 1 - Hello World (Go Test)
+name: Chapter 1 - Hello World
 
 on:
   # Events
@@ -11,16 +11,14 @@ on:
     branches:
       - main
     paths:
-      - "./chapters/go/go.mod"
-      - "./chapters/go/go.sum"
-      - "./chapters/go/*.go"    
-      - ".github/workflows/chapter-1-go.yaml"
+      - './chapters/go/hello/**'
+      - '.github/workflows/chapter-1-hello.yaml'
 
   # issusのコメントでワークフローをトリガーする設定
   issue_comment:
     types: [created, deleted]
 
-  # 指定した時間にワークフローをトリガーする設定 
+  # 指定した時間にワークフローをトリガーする設定
   # schedule:
   #   - cron: "0 9 1 * *" # At 09:00 on day-of-month 1.
 
@@ -31,7 +29,7 @@ permissions: {}
 defaults:
   run:
     shell: bash
-    
+
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
@@ -46,17 +44,17 @@ jobs:
       contents: read
     defaults:
       run:
-        working-directory: ./chapters/go/
+        working-directory: './chapters/go/hello/'
 
-    # steps は job の中で実行されるタスクの集合体です。 
+    # steps は job の中で実行されるタスクの集合体です。
     steps:
       # 複雑な処理や頻繁に使用する処理は、アクションを定義して使用することができます。
       - uses: actions/checkout@v7
 
       - name: Set up Go
         uses: actions/setup-go@v7
         with:
-          go-version: "1.26.5"
+          go-version: '1.26'
           cache: false
 
       - name: Build

.github/workflows/chapter-2-1-ci.yaml

@@ -3,14 +3,13 @@
 name: Chapter 2 (1) - CI
 
 on:
+  # main ブランチへのプルリクエストが作成されたときに実行する
   pull_request:
     branches:
       - main
     paths:
-      - "./chapters/go/go.mod"
-      - "./chapters/go/go.sum"
-      - "./chapters/go/*.go"
-      - ".github/workflows/chapter-2-1-ci.yaml"
+      - './chapters/go/hello-api/**'
+      - '.github/workflows/chapter-2-1-ci.yaml'
   workflow_dispatch:
 
 permissions: {}
@@ -30,22 +29,27 @@ jobs:
       contents: read
     defaults:
       run:
-        working-directory: ./chapters/go/
+        working-directory: 'chapters/go/hello-api/'
 
     steps:
       - name: チェックアウトする
         uses: actions/checkout@v7
+
       - name: Go の環境をセットアップする
         uses: actions/setup-go@v7
         with:
-          go-version: "1.26.5"
-          
+          go-version: '1.26'
+
       - name: フォーマットを実行する
-        # フォーマット違反時にステップを失敗させる
+        # gofmt はフォーマット違反の検出にかかわらず正常終了する。
+        # そのため test -z で違反がある場合に失敗させる。
         run: test -z "$(gofmt -l .)"
+
       - name: 静的解析を実行する
         run: go vet ./...
+
       - name: テストを実行する
         run: go test
+
       - name: ビルドを実行する
         run: go build .

.github/workflows/chapter-2-2-cd.yaml

@@ -3,20 +3,20 @@
 name: Chapter 2 (2) - CD
 
 on:
+  # main への push つまりマージが行われたときに実行する
   push:
     branches:
       - main
     paths:
-      - "./chapters/go/go.mod"
-      - "./chapters/go/go.sum"
-      - "./chapters/go/*.go"
+      - './chapters/go/hello-api/**'
+      - './.github/workflows/chapter-2-2-cd.yaml'
   workflow_dispatch:
 
 permissions: {}
 defaults:
   run:
     shell: bash
-    
+
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
@@ -25,25 +25,22 @@ jobs:
   cd:
     name: cd
     runs-on: ubuntu-latest
+    # GitHub Container Registry にイメージを push するための権限を付与する
     permissions:
       contents: read
       packages: write
+    defaults:
+      run:
+        working-directory: './chapters/go/hello-api/'
+
     steps:
       - uses: actions/checkout@v7
-      - name: Container registory に認証する
+
+      - name: Container registry に認証する
         run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u ${{ github.actor }} --password-stdin
-      - name: Container registory に認証する
-        uses: docker/login-action@v3
-        with:
-          registry: ghcr.io
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
+
       - name: Docker ビルドする
         run: docker build -t ghcr.io/${{ github.repository }}:latest .
+
       - name: Docker イメージをプッシュする
         run: docker push ghcr.io/${{ github.repository }}:latest
-      - name: Docker をビルドおよびプッシュする
-        uses: docker/build-push-action@v5
-        with:
-          push: true
-          tags: ghcr.io/${{ github.repository }}:latest

.github/workflows/chapter-2-3-cd-action.yaml

@@ -0,0 +1,56 @@
+# Chapter 2 マージ駆動でCDを実現する(Docker公式のactionを使用する方法).
+---
+name: Chapter 2 (3) - CD with Docker action
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - './chapters/go/hello-api/**'
+      - './.github/workflows/chapter-2-3-cd-action.yaml'
+  workflow_dispatch:
+
+permissions: {}
+defaults:
+  run:
+    shell: bash
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  cd:
+    name: cd
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    defaults:
+      run:
+        working-directory: './chapters/go/hello-api/'
+
+    steps:
+      - uses: actions/checkout@v7
+
+      # https://github.com/marketplace/actions/build-and-push-docker-images
+      - name: Login to Docker Hub
+        uses: docker/login-action@v4
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v4
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v4
+
+      - name: Build and push
+        uses: docker/build-push-action@v7
+        with:
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: ghcr.io/${{ github.repository }}:latest

.github/workflows/chapter-3-1-context.yaml

@@ -1,32 +1,42 @@
 # Chapter 3 ワークフロー内で利用可能な値（コンテキスト）.
 ---
-name: Chapter 3 (1) - actions/context
+name: Chapter 3 (1) - Context
 
 on:
   pull_request:
     paths:
-      - ".github/workflows/context.yaml"
+      - '.github/workflows/chapter-3-1-context.yaml'
   workflow_dispatch:
 
 permissions: {}
+defaults:
+  run:
+    shell: bash
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+# ワークフロー内では GitHub Actions に関連するさまざまな情報へアクセスするための値（コンテキスト）が利用できます。
 
 jobs:
   display:
     name: display
     runs-on: ubuntu-latest
     permissions:
       contents: read
+
     steps:
       - name: プルリクエストの情報を表示
         env:
-          GITHUB_HEAD_REF: "${{ github.head_ref }}"
+          GITHUB_HEAD_REF: '${{ github.head_ref }}'
         run: |
           echo "プルリクエストのブランチ名: $GITHUB_HEAD_REF"
           echo "プルリクエストの番号: ${{ github.event.pull_request.number }}"
           echo "プルリクエストの作成者": ${{ github.event.pull_request.user.login }}
 
-      # - see: https://docs.github.com/ja/actions/writing-workflows/choosing-what-your-workflow-does/accessing-contextual-information-about-workflow-runs
       - name: github コンテキストの表示
+        # github コンテキストには主に、GitHub Actions の実行に関する情報が格納されています
         # Be aware that it contains sensitive information such as github.token!
         env:
           GITHUB_EVENT_CONTEXT: ${{ toJson(github.event) }}
@@ -39,14 +49,32 @@ jobs:
           echo "github.event: $GITHUB_EVENT_CONTEXT"
 
       - name: runner コンテキストの表示
+        # runner コンテキストには主に、GitHub Actions の実行環境に関する情報が格納されています
         env:
           RUNNER_CONTEXT: ${{ toJson(runner) }}
         run: echo "$RUNNER_CONTEXT"
 
       - uses: actions/checkout@v7
+        # steps コンテキストを利用するには、id を指定する必要があります
         id: checkout
-      - name: actions/checkout のステータスを表示
-        run: echo "${{ steps.checkout.conclusion }}"
 
-      - name: job のステータスを表示
-        run: echo "${{ job.status }}"
+      - name: steps コンテキストの表示
+        # steps コンテキストには、同じジョブ内で実行されたステップの情報が格納されています
+        run: |
+          # actions/checkout のステータスを表示
+          echo "${{ steps.checkout.conclusion }}"
+
+      - name: job コンテキストの表示
+        # job コンテキストには、同じジョブ内で実行されたステップの情報が格納されています
+        run: |
+          echo "${{ job.status }}"
+          echo "${{ toJson(job) }}"
+
+      - name: その他のコンテキストの表示
+        # - see: https://docs.github.com/ja/actions/writing-workflows/choosing-what-your-workflow-does/accessing-contextual-information-about-workflow-runs
+        run: |
+          echo "${{ toJson(matrix) }}"
+          echo "${{ toJson(needs) }}"
+          echo "${{ toJson(runner.os) }}"
+          echo "${{ toJson(env) }}"
+          echo "${{ toJson(inputs) }}"