update go-critic (#679)

Go-critic got a new checker `regexpPattern`.

go.mod

@@ -7,7 +7,7 @@ require (
 	github.com/OpenPeeDeeP/depguard v1.0.0
 	github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6 // indirect
 	github.com/fatih/color v1.6.0
-	github.com/go-critic/go-critic v0.3.5-0.20190526074819-1df300866540
+	github.com/go-critic/go-critic v0.3.5-0.20190904082202-d79a9f0c64db
 	github.com/go-lintpack/lintpack v0.5.2
 	github.com/go-ole/go-ole v1.2.1 // indirect
 	github.com/gobwas/glob v0.2.3 // indirect

go.sum

@@ -10,8 +10,8 @@ github.com/fatih/color v1.6.0 h1:66qjqZk8kalYAvDRtM1AdAJQI0tj4Wrue3Eq3B3pmFU=
 github.com/fatih/color v1.6.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
 github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
-github.com/go-critic/go-critic v0.3.5-0.20190526074819-1df300866540 h1:djv/qAomOVj8voCHt0M0OYwR/4vfDq1zNKSPKjJCexs=
+github.com/go-critic/go-critic v0.3.5-0.20190904082202-d79a9f0c64db h1:GYXWx7Vr3+zv833u+8IoXbNnQY0AdXsxAgI0kX7xcwA=
-github.com/go-critic/go-critic v0.3.5-0.20190526074819-1df300866540/go.mod h1:+sE8vrLDS2M0pZkBk0wy6+nLdKexVDrl/jBqQOTDThA=
+github.com/go-critic/go-critic v0.3.5-0.20190904082202-d79a9f0c64db/go.mod h1:+sE8vrLDS2M0pZkBk0wy6+nLdKexVDrl/jBqQOTDThA=
 github.com/go-lintpack/lintpack v0.5.2 h1:DI5mA3+eKdWeJ40nU4d6Wc26qmdG8RCi/btYq0TuRN0=
 github.com/go-lintpack/lintpack v0.5.2/go.mod h1:NwZuYi2nUHho8XEIZ6SIxihrnPoqBTDqfpXvXAN0sXM=
 github.com/go-ole/go-ole v1.2.1 h1:2lOsA72HgjxAuMlKpFiCbHTvu44PIVkZ5hqm3RSdI/E=

vendor/github.com/go-critic/go-critic/checkers/dupArg_checker.go

@@ -24,6 +24,9 @@ func init() {
 		// args[xIndex] and args[yIndex] are equal.
 		newMatcherFunc := func(xIndex, yIndex int) func(*ast.CallExpr) bool {
 			return func(call *ast.CallExpr) bool {
+				if len(call.Args) <= xIndex || len(call.Args) <= yIndex {
+					return false
+				}
 				x := call.Args[xIndex]
 				y := call.Args[yIndex]
 				return astequal.Expr(x, y)

vendor/github.com/go-critic/go-critic/checkers/regexpPattern_checker.go

@@ -0,0 +1,68 @@
+package checkers
+
+import (
+	"go/ast"
+	"go/constant"
+	"regexp"
+	"strings"
+
+	"github.com/go-lintpack/lintpack"
+	"github.com/go-lintpack/lintpack/astwalk"
+)
+
+func init() {
+	var info lintpack.CheckerInfo
+	info.Name = "regexpPattern"
+	info.Tags = []string{"diagnostic", "experimental"}
+	info.Summary = "Detects suspicious regexp patterns"
+	info.Before = "regexp.MustCompile(`google.com|yandex.ru`)"
+	info.After = "regexp.MustCompile(`google\\.com|yandex\\.ru`)"
+
+	collection.AddChecker(&info, func(ctx *lintpack.CheckerContext) lintpack.FileWalker {
+		domains := []string{
+			"com",
+			"org",
+			"info",
+			"net",
+			"ru",
+			"de",
+		}
+
+		allDomains := strings.Join(domains, "|")
+		domainRE := regexp.MustCompile(`[^\\]\.(` + allDomains + `)\b`)
+		return astwalk.WalkerForExpr(&regexpPatternChecker{
+			ctx:      ctx,
+			domainRE: domainRE,
+		})
+	})
+}
+
+type regexpPatternChecker struct {
+	astwalk.WalkHandler
+	ctx *lintpack.CheckerContext
+
+	domainRE *regexp.Regexp
+}
+
+func (c *regexpPatternChecker) VisitExpr(x ast.Expr) {
+	call, ok := x.(*ast.CallExpr)
+	if !ok {
+		return
+	}
+
+	switch qualifiedName(call.Fun) {
+	case "regexp.Compile", "regexp.CompilePOSIX", "regexp.MustCompile", "regexp.MustCompilePosix":
+		cv := c.ctx.TypesInfo.Types[call.Args[0]].Value
+		if cv == nil || cv.Kind() != constant.String {
+			return
+		}
+		s := constant.StringVal(cv)
+		if m := c.domainRE.FindStringSubmatch(s); m != nil {
+			c.warnDomain(call.Args[0], m[1])
+		}
+	}
+}
+
+func (c *regexpPatternChecker) warnDomain(cause ast.Expr, domain string) {
+	c.ctx.Warn(cause, "'.%s' should probably be '\\.%s'", domain, domain)
+}

vendor/modules.txt

@@ -10,7 +10,7 @@ github.com/davecgh/go-spew/spew
 github.com/fatih/color
 # github.com/fsnotify/fsnotify v1.4.7
 github.com/fsnotify/fsnotify
-# github.com/go-critic/go-critic v0.3.5-0.20190526074819-1df300866540
+# github.com/go-critic/go-critic v0.3.5-0.20190904082202-d79a9f0c64db
 github.com/go-critic/go-critic/checkers
 github.com/go-critic/go-critic/checkers/internal/lintutil
 # github.com/go-lintpack/lintpack v0.5.2
@@ -187,6 +187,8 @@ github.com/stretchr/testify/require
 github.com/timakin/bodyclose/passes/bodyclose
 # github.com/ultraware/funlen v0.0.1 => github.com/golangci/funlen v0.0.0-20190909161642-5e59b9546114
 github.com/ultraware/funlen
+# github.com/ultraware/whitespace v0.0.2
+github.com/ultraware/whitespace
 # github.com/valyala/bytebufferpool v1.0.0
 github.com/valyala/bytebufferpool
 # github.com/valyala/quicktemplate v1.1.1