Add staticcheck tool

vendor/honnef.co/go/tools/staticcheck/sa4028/sa4028.go

@@ -0,0 +1,35 @@
+package sa4028
+
+import (
+	"honnef.co/go/tools/analysis/code"
+	"honnef.co/go/tools/analysis/lint"
+	"honnef.co/go/tools/analysis/report"
+	"honnef.co/go/tools/pattern"
+
+	"golang.org/x/tools/go/analysis"
+)
+
+var SCAnalyzer = lint.InitializeAnalyzer(&lint.Analyzer{
+	Analyzer: &analysis.Analyzer{
+		Name:     "SA4028",
+		Run:      run,
+		Requires: code.RequiredAnalyzers,
+	},
+	Doc: &lint.RawDocumentation{
+		Title:    `\'x % 1\' is always zero`,
+		Since:    "2022.1",
+		Severity: lint.SeverityWarning,
+		MergeIf:  lint.MergeIfAny, // MergeIfAny if we only flag literals, not named constants
+	},
+})
+
+var Analyzer = SCAnalyzer.Analyzer
+
+var moduloOneQ = pattern.MustParse(`(BinaryExpr _ "%" (IntegerLiteral "1"))`)
+
+func run(pass *analysis.Pass) (any, error) {
+	for node := range code.Matches(pass, moduloOneQ) {
+		report.Report(pass, node, "x % 1 is always zero")
+	}
+	return nil, nil
+}