Add CI workflow to lint and check formatting of Go code

.github/workflows/check-go-task.yml

@@ -0,0 +1,137 @@
+# Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/check-go-task.md
+name: Check Go
+
+env:
+  # See: https://github.com/actions/setup-go/tree/v2#readme
+  GO_VERSION: "1.16"
+
+# See: https://docs.github.com/en/actions/reference/events-that-trigger-workflows
+on:
+  push:
+    paths:
+      - ".github/workflows/check-go-task.ya?ml"
+      - "Taskfile.ya?ml"
+      - "go.mod"
+      - "go.sum"
+      - "**.go"
+  pull_request:
+    paths:
+      - ".github/workflows/check-go-task.ya?ml"
+      - "Taskfile.ya?ml"
+      - "go.mod"
+      - "go.sum"
+      - "**.go"
+  workflow_dispatch:
+  repository_dispatch:
+
+jobs:
+  check-errors:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ env.GO_VERSION }}
+
+      - name: Install Task
+        uses: arduino/setup-task@v1
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          version: 3.x
+
+      - name: Check for errors
+        run: task go:vet
+
+  check-outdated:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ env.GO_VERSION }}
+
+      - name: Install Task
+        uses: arduino/setup-task@v1
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          version: 3.x
+
+      - name: Modernize usages of outdated APIs
+        run: task go:fix
+
+      - name: Check if any fixes were needed
+        run: git diff --color --exit-code
+
+  check-style:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ env.GO_VERSION }}
+
+      - name: Install Task
+        uses: arduino/setup-task@v1
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          version: 3.x
+
+      - name: Install golint
+        run: go install golang.org/x/lint/golint@latest
+
+      - name: Check style
+        run: task --silent go:lint
+
+  check-formatting:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ env.GO_VERSION }}
+
+      - name: Install Task
+        uses: arduino/setup-task@v1
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          version: 3.x
+
+      - name: Format code
+        run: task go:format
+
+      - name: Check formatting
+        run: git diff --color --exit-code
+
+  check-config:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ env.GO_VERSION }}
+
+      - name: Run go mod tidy
+        run: go mod tidy
+
+      - name: Check whether any tidying was needed
+        run: git diff --color --exit-code

Taskfile.yml

@@ -1,5 +1,17 @@
 version: "3"
 
+vars:
+  DIST_DIR: "dist"
+  DUMMY_DISCOVERY_VERSION:
+    sh: echo "$(git describe --tags --dirty --broken)"
+  DUMMY_DISCOVERY_TIMESTAMP:
+    sh: echo "$(date -u +"%Y-%m-%dT%H:%M:%SZ")"
+  DUMMY_DISCOVERY_LDFLAGS: >
+    -X github.com/arduino/pluggable-discovery-protocol-handler/dummy-discovery/args.Tag={{.DUMMY_DISCOVERY_VERSION}}
+    -X github.com/arduino/pluggable-discovery-protocol-handler/dummy-discovery/args.Timestamp={{.DUMMY_DISCOVERY_TIMESTAMP}}
+  DEFAULT_GO_PACKAGES:
+    sh: echo $(go list ./... | tr '\n' ' ')
+
 tasks:
   build-dummy-discovery:
     desc: Build the dummy-discovery client example
@@ -73,12 +85,41 @@ tasks:
     cmds:
       - poetry update
 
-vars:
-  DIST_DIR: "dist"
-  DUMMY_DISCOVERY_VERSION:
-    sh: echo "$(git describe --tags --dirty --broken)"
-  DUMMY_DISCOVERY_TIMESTAMP:
-    sh: echo "$(date -u +"%Y-%m-%dT%H:%M:%SZ")"
-  DUMMY_DISCOVERY_LDFLAGS: >
-    -X github.com/arduino/pluggable-discovery-protocol-handler/dummy-discovery/args.Tag={{.DUMMY_DISCOVERY_VERSION}}
-    -X github.com/arduino/pluggable-discovery-protocol-handler/dummy-discovery/args.Timestamp={{.DUMMY_DISCOVERY_TIMESTAMP}}
+  # Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/check-go-task/Taskfile.yml
+  go:check:
+    desc: Check for problems with Go code
+    deps:
+      - task: go:vet
+      - task: go:lint
+
+  # Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/check-go-task/Taskfile.yml
+  go:vet:
+    desc: Check for errors in Go code
+    cmds:
+      - go vet {{default .DEFAULT_GO_PACKAGES .GO_PACKAGES}}
+
+  # Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/check-go-task/Taskfile.yml
+  go:fix:
+    desc: Modernize usages of outdated APIs
+    cmds:
+      - go fix {{default .DEFAULT_GO_PACKAGES .GO_PACKAGES}}
+
+  # Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/check-go-task/Taskfile.yml
+  go:lint:
+    desc: Lint Go code
+    cmds:
+      - |
+        if ! which golint &>/dev/null; then
+          echo "golint not installed or not in PATH. Please install: https://github.com/golang/lint#installation"
+          exit 1
+        fi
+      - |
+        golint \
+          {{default "-min_confidence 0.8 -set_exit_status" .GO_LINT_FLAGS}} \
+          {{default .DEFAULT_GO_PACKAGES .GO_PACKAGES}}
+
+  # Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/check-go-task/Taskfile.yml
+  go:format:
+    desc: Format Go code
+    cmds:
+      - go fmt {{default .DEFAULT_GO_PACKAGES .GO_PACKAGES}}