Add lint workflow

.github/workflows/lint.yml

@@ -0,0 +1,39 @@
+name: Lint
+on:
+  push:
+    paths:
+      - "**.go"
+      - go.mod
+      - go.sum
+  pull_request:
+    paths:
+      - "**.go"
+      - go.mod
+      - go.sum
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Set up Go 1.19
+        uses: actions/setup-go@v3
+        with:
+          go-version: 1.19
+
+      - name: Check out code
+        uses: actions/checkout@v2
+
+      - name: Verify dependencies
+        env:
+          LINT_VERSION: 1.50.1
+        run: |
+          go mod verify
+          go mod download
+
+          curl -fsSL https://github.com/golangci/golangci-lint/releases/download/v${LINT_VERSION}/golangci-lint-${LINT_VERSION}-linux-amd64.tar.gz | \
+            tar xz --strip-components 1 --wildcards \*/golangci-lint
+          mkdir -p bin && mv golangci-lint bin/
+
+      - name: Run checks
+        run: bin/golangci-lint run --out-format=github-actions

main.go

@@ -35,12 +35,12 @@ func mainRun() exitCode {
 	rootCmd, err := cmd.NewRootCmd(iostream)
 
 	if err != nil {
-		fmt.Fprint(stderr, "failed to create root command: %s\n", err)
+		fmt.Fprintf(stderr, "failed to create root command: %s\n", err)
 		return exitError
 	}
-	if _, err := rootCmd.ExecuteContextC(ctx); err != nil {
+	if command, err := rootCmd.ExecuteContextC(ctx); err != nil {
 		// printError(stderr, err, cmd, hasDebug)
-		// fmt.Fprint(stderr, "Error %s", err, command)
+		fmt.Fprintf(stderr, "Error %v", command)
 
 	}
 	return exitOK