feat: Waku v2 bridge

Issue #12610

vendor/github.com/anacrolix/log/stream-handler.go

@@ -0,0 +1,59 @@
+package log
+
+import (
+	"fmt"
+	"io"
+	"runtime"
+	"time"
+)
+
+type StreamHandler struct {
+	W   io.Writer
+	Fmt ByteFormatter
+}
+
+func (me StreamHandler) Handle(r Record) {
+	r.Msg = r.Skip(1)
+	me.W.Write(me.Fmt(r))
+}
+
+type ByteFormatter func(Record) []byte
+
+func LineFormatter(msg Record) []byte {
+	names := msg.Names
+	if true || len(names) == 0 {
+		var pc [1]uintptr
+		msg.Callers(1, pc[:])
+		names = pcNames(pc[0], names)
+	}
+	ret := []byte(fmt.Sprintf(
+		"%s %-5s %s: %s",
+		time.Now().Format("2006-01-02T15:04:05-0700"),
+		msg.Level.LogString(),
+		names,
+		msg.Text(),
+	))
+	if ret[len(ret)-1] != '\n' {
+		ret = append(ret, '\n')
+	}
+	return ret
+}
+
+func pcNames(pc uintptr, names []string) []string {
+	if pc == 0 {
+		panic(pc)
+	}
+	funcName, file, line := func() (string, string, int) {
+		if false {
+			// This seems to result in one less allocation, but doesn't handle inlining?
+			func_ := runtime.FuncForPC(pc)
+			file, line := func_.FileLine(pc)
+			return func_.Name(), file, line
+		} else {
+			f, _ := runtime.CallersFrames([]uintptr{pc}).Next()
+			return f.Function, f.File, f.Line
+		}
+	}()
+	_ = file
+	return append(names, fmt.Sprintf("%s:%v", funcName, line))
+}