Add staticcheck tool

vendor/honnef.co/go/tools/simple/s1037/s1037.go

@@ -0,0 +1,55 @@
+package s1037
+
+import (
+	"go/ast"
+
+	"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:     "S1037",
+		Run:      run,
+		Requires: append([]*analysis.Analyzer{generated.Analyzer}, code.RequiredAnalyzers...),
+	},
+	Doc: &lint.RawDocumentation{
+		Title: `Elaborate way of sleeping`,
+		Text: `Using a select statement with a single case receiving
+from the result of \'time.After\' is a very elaborate way of sleeping that
+can much simpler be expressed with a simple call to time.Sleep.`,
+		Since:   "2020.1",
+		MergeIf: lint.MergeIfAny,
+	},
+})
+
+var Analyzer = SCAnalyzer.Analyzer
+
+var (
+	checkElaborateSleepQ = pattern.MustParse(`(SelectStmt (CommClause (UnaryExpr "<-" (CallExpr (Symbol "time.After") [arg])) body))`)
+	checkElaborateSleepR = pattern.MustParse(`(CallExpr (SelectorExpr (Ident "time") (Ident "Sleep")) [arg])`)
+)
+
+func run(pass *analysis.Pass) (any, error) {
+	for node, m := range code.Matches(pass, checkElaborateSleepQ) {
+		if body, ok := m.State["body"].([]ast.Stmt); ok && len(body) == 0 {
+			report.Report(pass, node, "should use time.Sleep instead of elaborate way of sleeping",
+				report.ShortRange(),
+				report.FilterGenerated(),
+				report.Fixes(edit.Fix("Use time.Sleep", edit.ReplaceWithPattern(pass.Fset, node, checkElaborateSleepR, m.State))))
+		} else {
+			// TODO(dh): we could make a suggested fix if the body
+			// doesn't declare or shadow any identifiers
+			report.Report(pass, node, "should use time.Sleep instead of elaborate way of sleeping",
+				report.ShortRange(),
+				report.FilterGenerated())
+		}
+	}
+	return nil, nil
+}