Update vendor (#1265)

vendor/github.com/mattermost/logr/format/plain.go

@@ -0,0 +1,75 @@
+package format
+
+import (
+	"bytes"
+	"fmt"
+
+	"github.com/mattermost/logr"
+)
+
+// Plain is the simplest formatter, outputting only text with
+// no colors.
+type Plain struct {
+	// DisableTimestamp disables output of timestamp field.
+	DisableTimestamp bool
+	// DisableLevel disables output of level field.
+	DisableLevel bool
+	// DisableMsg disables output of msg field.
+	DisableMsg bool
+	// DisableContext disables output of all context fields.
+	DisableContext bool
+	// DisableStacktrace disables output of stack trace.
+	DisableStacktrace bool
+
+	// Delim is an optional delimiter output between each log field.
+	// Defaults to a single space.
+	Delim string
+
+	// TimestampFormat is an optional format for timestamps. If empty
+	// then DefTimestampFormat is used.
+	TimestampFormat string
+}
+
+// Format converts a log record to bytes.
+func (p *Plain) Format(rec *logr.LogRec, stacktrace bool, buf *bytes.Buffer) (*bytes.Buffer, error) {
+	delim := p.Delim
+	if delim == "" {
+		delim = " "
+	}
+	if buf == nil {
+		buf = &bytes.Buffer{}
+	}
+
+	timestampFmt := p.TimestampFormat
+	if timestampFmt == "" {
+		timestampFmt = logr.DefTimestampFormat
+	}
+
+	if !p.DisableTimestamp {
+		var arr [128]byte
+		tbuf := rec.Time().AppendFormat(arr[:0], timestampFmt)
+		buf.Write(tbuf)
+		buf.WriteString(delim)
+	}
+	if !p.DisableLevel {
+		fmt.Fprintf(buf, "%v%s", rec.Level().Name, delim)
+	}
+	if !p.DisableMsg {
+		fmt.Fprint(buf, rec.Msg(), delim)
+	}
+	if !p.DisableContext {
+		ctx := rec.Fields()
+		if len(ctx) > 0 {
+			logr.WriteFields(buf, ctx, " ")
+		}
+	}
+	if stacktrace && !p.DisableStacktrace {
+		frames := rec.StackFrames()
+		if len(frames) > 0 {
+			buf.WriteString("\n")
+			logr.WriteStacktrace(buf, rec.StackFrames())
+		}
+	}
+	buf.WriteString("\n")
+	return buf, nil
+}