Added zapcore.TimeEncoderOfLayout

zapcore/encoder.go

@@ -21,6 +21,7 @@
 package zapcore
 
 import (
+	"strings"
 	"time"
 
 	"go.uber.org/zap/buffer"
@@ -151,15 +152,25 @@ func RFC3339NanoTimeEncoder(t time.Time, enc PrimitiveArrayEncoder) {
 	encodeTimeLayout(t, time.RFC3339Nano, enc)
 }
 
+// TimeEncoderOfFormat returns TimeEncoder which serializes a time.Time using
+// given format.
+func TimeEncoderOfFormat(format string) TimeEncoder {
+	return func(t time.Time, enc PrimitiveArrayEncoder) {
+		encodeTimeLayout(t, format, enc)
+	}
+}
+
 // UnmarshalText unmarshals text to a TimeEncoder.
 // "rfc3339nano" and "RFC3339Nano" are unmarshaled to RFC3339NanoTimeEncoder.
 // "rfc3339" and "RFC3339" are unmarshaled to RFC3339TimeEncoder.
 // "iso8601" and "ISO8601" are unmarshaled to ISO8601TimeEncoder.
 // "millis" is unmarshaled to EpochMillisTimeEncoder.
 // "nanos" is unmarshaled to EpochNanosEncoder.
+// "format=<time-layout-format>" is unmarshaled to TimeEncoder with given format.
 // Anything else is unmarshaled to EpochTimeEncoder.
 func (e *TimeEncoder) UnmarshalText(text []byte) error {
-	switch string(text) {
+	vals := strings.SplitAfterN(string(text), "=", 2)
+	switch vals[0] {
 	case "rfc3339nano", "RFC3339Nano":
 		*e = RFC3339NanoTimeEncoder
 	case "rfc3339", "RFC3339":
@@ -170,6 +181,8 @@ func (e *TimeEncoder) UnmarshalText(text []byte) error {
 		*e = EpochMillisTimeEncoder
 	case "nanos":
 		*e = EpochNanosTimeEncoder
+	case "format=":
+		*e = TimeEncoderOfFormat(vals[1])
 	default:
 		*e = EpochTimeEncoder
 	}

zapcore/encoder_test.go

@@ -530,6 +530,7 @@ func TestTimeEncoders(t *testing.T) {
 		{"ISO8601", "1970-01-01T00:01:40.050Z"},
 		{"millis", 100050.005},
 		{"nanos", int64(100050005000)},
+		{"format=06/01/02 03:04pm", "70/01/01 12:01am"},
 		{"", 100.050005},
 		{"something-random", 100.050005},
 		{"rfc3339", "1970-01-01T00:01:40Z"},