actionsでGoのバージョンをgo.modから読み取る

.github/workflows/main.yml

@@ -12,11 +12,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - name: Read Go version
-        run: echo "GO_VERSION=$(cat ./.go-version)" >> $GITHUB_ENV
       - uses: actions/setup-go@v4
         with:
-          go-version: ${{ env.GO_VERSION }}
+          go-version-file: "./go.mod"
       - run: go mod download
       - run: make traQ
       - uses: actions/upload-artifact@v3
@@ -28,11 +26,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - name: Read Go version
-        run: echo "GO_VERSION=$(cat ./.go-version)" >> $GITHUB_ENV
       - uses: actions/setup-go@v4
         with:
-          go-version: ${{ env.GO_VERSION }}
+          go-version-file: "./go.mod"
       - name: golangci-lint
         uses: golangci/golangci-lint-action@v3
         with:
@@ -52,11 +48,9 @@ jobs:
           - 3306:3306
     steps:
       - uses: actions/checkout@v3
-      - name: Read Go version
-        run: echo "GO_VERSION=$(cat ./.go-version)" >> $GITHUB_ENV
       - uses: actions/setup-go@v4
         with:
-          go-version: ${{ env.GO_VERSION }}
+          go-version-file: "./go.mod"
       - name: Run tests
         run: |
           export TRAQ_IMAGEMAGICK=`which convert`

.github/workflows/release.yml

@@ -56,11 +56,9 @@ jobs:
         with:
           # goreleaserがchangelogを生成する用
           fetch-depth: 0
-      - name: Read Go version
-        run: echo "GO_VERSION=$(cat ./.go-version)" >> $GITHUB_ENV
       - uses: actions/setup-go@v4
         with:
-          go-version: ${{ env.GO_VERSION }}
+          go-version-file: "./go.mod"
       - name: Run GoReleaser
         uses: goreleaser/goreleaser-action@v4
         with: