Add staticcheck tool

vendor/honnef.co/go/tools/stylecheck/st1017/st1017.go

@@ -0,0 +1,47 @@
+package st1017
+
+import (
+	"honnef.co/go/tools/analysis/code"
+	"honnef.co/go/tools/analysis/edit"
+	"honnef.co/go/tools/analysis/facts/generated"
+	"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:     "ST1017",
+		Run:      run,
+		Requires: append([]*analysis.Analyzer{generated.Analyzer}, code.RequiredAnalyzers...),
+	},
+	Doc: &lint.RawDocumentation{
+		Title: `Don't use Yoda conditions`,
+		Text: `Yoda conditions are conditions of the kind \"if 42 == x\", where the
+literal is on the left side of the comparison. These are a common
+idiom in languages in which assignment is an expression, to avoid bugs
+of the kind \"if (x = 42)\". In Go, which doesn't allow for this kind of
+bug, we prefer the more idiomatic \"if x == 42\".`,
+		Since:   "2019.2",
+		MergeIf: lint.MergeIfAny,
+	},
+})
+
+var Analyzer = SCAnalyzer.Analyzer
+
+var (
+	checkYodaConditionsQ = pattern.MustParse(`(BinaryExpr left@(TrulyConstantExpression _) tok@(Or "==" "!=") right@(Not (TrulyConstantExpression _)))`)
+	checkYodaConditionsR = pattern.MustParse(`(BinaryExpr right tok left)`)
+)
+
+func run(pass *analysis.Pass) (any, error) {
+	for node, m := range code.Matches(pass, checkYodaConditionsQ) {
+		edits := code.EditMatch(pass, node, m, checkYodaConditionsR)
+		report.Report(pass, node, "don't use Yoda conditions",
+			report.FilterGenerated(),
+			report.Fixes(edit.Fix("Un-Yoda-fy", edits...)))
+	}
+	return nil, nil
+}