Add staticcheck tool

vendor/honnef.co/go/tools/staticcheck/sa1000/sa1000.go

@@ -0,0 +1,46 @@
+package sa1000
+
+import (
+	"go/constant"
+	"regexp"
+
+	"honnef.co/go/tools/analysis/callcheck"
+	"honnef.co/go/tools/analysis/lint"
+	"honnef.co/go/tools/internal/passes/buildir"
+
+	"golang.org/x/tools/go/analysis"
+)
+
+var SCAnalyzer = lint.InitializeAnalyzer(&lint.Analyzer{
+	Analyzer: &analysis.Analyzer{
+		Name:     "SA1000",
+		Requires: []*analysis.Analyzer{buildir.Analyzer},
+		Run:      callcheck.Analyzer(rules),
+	},
+	Doc: &lint.RawDocumentation{
+		Title:    `Invalid regular expression`,
+		Since:    "2017.1",
+		Severity: lint.SeverityError,
+		MergeIf:  lint.MergeIfAny,
+	},
+})
+
+var Analyzer = SCAnalyzer.Analyzer
+
+var rules = map[string]callcheck.Check{
+	"regexp.MustCompile": check,
+	"regexp.Compile":     check,
+	"regexp.Match":       check,
+	"regexp.MatchReader": check,
+	"regexp.MatchString": check,
+}
+
+func check(call *callcheck.Call) {
+	arg := call.Args[0]
+	if c := callcheck.ExtractConstExpectKind(arg.Value, constant.String); c != nil {
+		s := constant.StringVal(c.Value)
+		if _, err := regexp.Compile(s); err != nil {
+			arg.Invalid(err.Error())
+		}
+	}
+}