Add staticcheck tool

vendor/honnef.co/go/tools/staticcheck/sa3001/sa3001.go

@@ -0,0 +1,47 @@
+package sa3001
+
+import (
+	"fmt"
+	"go/ast"
+
+	"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:     "SA3001",
+		Run:      run,
+		Requires: code.RequiredAnalyzers,
+	},
+	Doc: &lint.RawDocumentation{
+		Title: `Assigning to \'b.N\' in benchmarks distorts the results`,
+		Text: `The testing package dynamically sets \'b.N\' to improve the reliability of
+benchmarks and uses it in computations to determine the duration of a
+single operation. Benchmark code must not alter \'b.N\' as this would
+falsify results.`,
+		Since:    "2017.1",
+		Severity: lint.SeverityError,
+		MergeIf:  lint.MergeIfAny,
+	},
+})
+
+var Analyzer = SCAnalyzer.Analyzer
+
+var query = pattern.MustParse(`(AssignStmt sel@(SelectorExpr selX (Ident "N")) "=" [_] )`)
+
+func run(pass *analysis.Pass) (any, error) {
+	for node, m := range code.Matches(pass, query) {
+		assign := node.(*ast.AssignStmt)
+		if !code.IsOfPointerToTypeWithName(pass, m.State["selX"].(ast.Expr), "testing.B") {
+			continue
+		}
+		report.Report(pass, assign,
+			fmt.Sprintf("should not assign to %s", report.Render(pass, m.State["sel"])))
+	}
+	return nil, nil
+}