switch to go vendoring

vendor/github.com/cs3org/reva/v2/pkg/logger/logger.go

@@ -0,0 +1,87 @@
+// Copyright 2018-2021 CERN
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// In applying this license, CERN does not waive the privileges and immunities
+// granted to it by virtue of its status as an Intergovernmental Organization
+// or submit itself to any jurisdiction.
+
+package logger
+
+import (
+	"io"
+	"os"
+	"time"
+
+	"github.com/rs/zerolog"
+)
+
+func init() {
+	zerolog.CallerSkipFrameCount = 2
+	zerolog.TimeFieldFormat = time.RFC3339Nano
+}
+
+// Mode changes the logging format.
+type Mode string
+
+const (
+	// JSONMode outputs JSON.
+	JSONMode Mode = "json"
+	// ConsoleMode outputs human-readable logs.
+	ConsoleMode Mode = "console"
+)
+
+// Option is the option to use to configure the logger.
+type Option func(l *zerolog.Logger)
+
+// New creates a new logger.
+func New(opts ...Option) *zerolog.Logger {
+	// create a default logger
+	zl := zerolog.New(os.Stderr).With().Timestamp().Caller().Logger()
+	for _, opt := range opts {
+		opt(&zl)
+	}
+	return &zl
+}
+
+// WithLevel is an option to configure the logging level.
+func WithLevel(lvl string) Option {
+	return func(l *zerolog.Logger) {
+		zlvl := parseLevel(lvl)
+		*l = l.Level(zlvl)
+	}
+}
+
+// WithWriter is an option to configure the logging output.
+func WithWriter(w io.Writer, m Mode) Option {
+	return func(l *zerolog.Logger) {
+		if m == ConsoleMode {
+			*l = l.Output(zerolog.ConsoleWriter{Out: w, TimeFormat: "2006-01-02 15:04:05.999"})
+		} else {
+			*l = l.Output(w)
+		}
+	}
+}
+
+func parseLevel(v string) zerolog.Level {
+	if v == "" {
+		return zerolog.InfoLevel
+	}
+
+	lvl, err := zerolog.ParseLevel(v)
+	if err != nil {
+		return zerolog.InfoLevel
+	}
+
+	return lvl
+}