Initial QSfera import

Server/vendor/go-micro.dev/v4/debug/log/os.go

@@ -0,0 +1,81 @@
+package log
+
+import (
+	"sync"
+
+	"github.com/google/uuid"
+	"go-micro.dev/v4/util/ring"
+)
+
+// Should stream from OS.
+type osLog struct {
+	format FormatFunc
+	buffer *ring.Buffer
+	subs   map[string]*osStream
+
+	sync.RWMutex
+	once sync.Once
+}
+
+type osStream struct {
+	stream chan Record
+}
+
+// Read reads log entries from the logger.
+func (o *osLog) Read(...ReadOption) ([]Record, error) {
+	var records []Record
+
+	// read the last 100 records
+	for _, v := range o.buffer.Get(100) {
+		records = append(records, v.Value.(Record))
+	}
+
+	return records, nil
+}
+
+// Write writes records to log.
+func (o *osLog) Write(r Record) error {
+	o.buffer.Put(r)
+	return nil
+}
+
+// Stream log records.
+func (o *osLog) Stream() (Stream, error) {
+	o.Lock()
+	defer o.Unlock()
+
+	// create stream
+	st := &osStream{
+		stream: make(chan Record, 128),
+	}
+
+	// save stream
+	o.subs[uuid.New().String()] = st
+
+	return st, nil
+}
+
+func (o *osStream) Chan() <-chan Record {
+	return o.stream
+}
+
+func (o *osStream) Stop() error {
+	return nil
+}
+
+func NewLog(opts ...Option) Log {
+	options := Options{
+		Format: DefaultFormat,
+	}
+	for _, o := range opts {
+		o(&options)
+	}
+
+	l := &osLog{
+		format: options.Format,
+		buffer: ring.New(1024),
+		subs:   make(map[string]*osStream),
+	}
+
+	return l
+}