Add varcheck

Author: sridharv

varcheck/varcheck.go

@@ -0,0 +1,19 @@
+// Package varcheck provides lint integration for the varcheck linter
+package varcheck
+
+import "github.com/surullabs/lint/checkers"
+
+// Check runs the varcheck linter (https://github.com/opennota/check)
+type Check struct {
+	// ReportExported reports exported variables that are unused
+	ReportExported bool
+}
+
+// Check runs varcheck and returns any errors found.
+func (c Check) Check(pkgs ...string) error {
+	var args []string
+	if c.ReportExported {
+		args = append(args, "-e")
+	}
+	return checkers.Lint("varcheck", "github.com/opennota/check/cmd/varcheck", pkgs, args...)
+}

varcheck/varcheck_test.go

@@ -0,0 +1,55 @@
+package varcheck_test
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/surullabs/lint"
+	"github.com/surullabs/lint/varcheck"
+	"github.com/surullabs/lint/testutil"
+)
+
+func TestGoVarcheck(t *testing.T) {
+	testutil.Test(t, "varchecktest", []testutil.StaticCheckTest{
+		{
+			Checker: varcheck.Check{},
+			Content: []byte(`package varchecktest
+// TestFunc is a test function
+func TestFunc() {
+}
+`),
+			Validate: testutil.NoError,
+		},
+		{
+			Checker: varcheck.Check{},
+			Content: []byte(`package varchecktest
+sfsff
+
+func TestFunc() {
+}
+`),
+			Validate: testutil.Contains("expected declaration, found 'IDENT' sfsff"),
+		},
+		{
+			Checker: varcheck.Check{},
+			Content: []byte(`package varchecktest
+var unused bool
+`),
+			Validate: testutil.HasSuffix("unused"),
+		},
+		{
+			Checker: lint.Skip(varcheck.Check{}, lint.StringSkipper{
+				Strings: []string{
+					"unused",
+				},
+				Matcher: strings.HasSuffix,
+			}),
+			Content: []byte(`package varchecktest
+
+var unused bool
+`),
+			Validate: testutil.NoError,
+		},
+	},
+	)
+}