Add staticcheck tool

vendor/honnef.co/go/tools/quickfix/qf1009/qf1009.go

@@ -0,0 +1,51 @@
+package qf1009
+
+import (
+	"go/ast"
+	"go/token"
+
+	"honnef.co/go/tools/analysis/code"
+	"honnef.co/go/tools/analysis/edit"
+	"honnef.co/go/tools/analysis/lint"
+	"honnef.co/go/tools/analysis/report"
+	"honnef.co/go/tools/pattern"
+
+	"golang.org/x/tools/go/analysis"
+	"golang.org/x/tools/go/analysis/passes/inspect"
+)
+
+var SCAnalyzer = lint.InitializeAnalyzer(&lint.Analyzer{
+	Analyzer: &analysis.Analyzer{
+		Name:     "QF1009",
+		Run:      run,
+		Requires: []*analysis.Analyzer{inspect.Analyzer},
+	},
+	Doc: &lint.RawDocumentation{
+		Title:    `Use \'time.Time.Equal\' instead of \'==\' operator`,
+		Since:    "2021.1",
+		Severity: lint.SeverityInfo,
+	},
+})
+
+var Analyzer = SCAnalyzer.Analyzer
+
+var timeEqualR = pattern.MustParse(`(CallExpr (SelectorExpr lhs (Ident "Equal")) rhs)`)
+
+func run(pass *analysis.Pass) (any, error) {
+	// FIXME(dh): create proper suggested fix for renamed import
+
+	fn := func(node ast.Node) {
+		expr := node.(*ast.BinaryExpr)
+		if expr.Op != token.EQL {
+			return
+		}
+		if !code.IsOfTypeWithName(pass, expr.X, "time.Time") || !code.IsOfTypeWithName(pass, expr.Y, "time.Time") {
+			return
+		}
+		report.Report(pass, node, "probably want to use time.Time.Equal instead",
+			report.Fixes(edit.Fix("Use time.Time.Equal method",
+				edit.ReplaceWithPattern(pass.Fset, node, timeEqualR, pattern.State{"lhs": expr.X, "rhs": expr.Y}))))
+	}
+	code.Preorder(pass, fn, (*ast.BinaryExpr)(nil))
+	return nil, nil
+}