Add staticcheck tool

vendor/honnef.co/go/tools/staticcheck/sa1015/sa1015.go

@@ -0,0 +1,69 @@
+package sa1015
+
+import (
+	"go/token"
+	"go/version"
+
+	"honnef.co/go/tools/analysis/code"
+	"honnef.co/go/tools/analysis/lint"
+	"honnef.co/go/tools/analysis/report"
+	"honnef.co/go/tools/go/ir"
+	"honnef.co/go/tools/go/ir/irutil"
+	"honnef.co/go/tools/internal/passes/buildir"
+
+	"golang.org/x/tools/go/analysis"
+)
+
+var SCAnalyzer = lint.InitializeAnalyzer(&lint.Analyzer{
+	Analyzer: &analysis.Analyzer{
+		Name:     "SA1015",
+		Run:      run,
+		Requires: []*analysis.Analyzer{buildir.Analyzer},
+	},
+	Doc: &lint.RawDocumentation{
+		Title: `Using \'time.Tick\' in a way that will leak. Consider using \'time.NewTicker\', and only use \'time.Tick\' in tests, commands and endless functions`,
+
+		Text: `Before Go 1.23, \'time.Ticker\'s had to be closed to be able to be garbage
+collected. Since \'time.Tick\' doesn't make it possible to close the underlying
+ticker, using it repeatedly would leak memory.
+
+Go 1.23 fixes this by allowing tickers to be collected even if they weren't closed.`,
+		Since:    "2017.1",
+		Severity: lint.SeverityWarning,
+		MergeIf:  lint.MergeIfAny,
+	},
+})
+
+var Analyzer = SCAnalyzer.Analyzer
+
+func run(pass *analysis.Pass) (any, error) {
+	for _, fn := range pass.ResultOf[buildir.Analyzer].(*buildir.IR).SrcFuncs {
+		if fn.Pos() == token.NoPos || version.Compare(code.StdlibVersion(pass, fn), "go1.23") >= 0 {
+			// Beginning with Go 1.23, the GC is able to collect unreferenced, unclosed
+			// tickers, which makes time.Tick safe(r) to use.
+			//
+			// When we don't have a valid position, we err on the side of false negatives.
+			// This shouldn't actually lead to any false negatives, as no functions
+			// without valid positions (such as the synthesized init function) should be
+			// able to use time.Tick.
+			continue
+		}
+
+		if code.IsMainLike(pass) || code.IsInTest(pass, fn) {
+			continue
+		}
+		for _, block := range fn.Blocks {
+			for _, ins := range block.Instrs {
+				call, ok := ins.(*ir.Call)
+				if !ok || !irutil.IsCallTo(call.Common(), "time.Tick") {
+					continue
+				}
+				if !irutil.Terminates(call.Parent()) {
+					continue
+				}
+				report.Report(pass, call, "using time.Tick leaks the underlying ticker, consider using it only in endless functions, tests and the main package, and use time.NewTicker here")
+			}
+		}
+	}
+	return nil, nil
+}