vendor: initial vendor

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

vendor/github.com/containerd/containerd/log/context.go

@@ -0,0 +1,90 @@
+/*
+   Copyright The containerd Authors.
+
+   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.
+*/
+
+package log
+
+import (
+	"context"
+	"sync/atomic"
+
+	"github.com/sirupsen/logrus"
+)
+
+var (
+	// G is an alias for GetLogger.
+	//
+	// We may want to define this locally to a package to get package tagged log
+	// messages.
+	G = GetLogger
+
+	// L is an alias for the the standard logger.
+	L = logrus.NewEntry(logrus.StandardLogger())
+)
+
+type (
+	loggerKey struct{}
+)
+
+// TraceLevel is the log level for tracing. Trace level is lower than debug level,
+// and is usually used to trace detailed behavior of the program.
+const TraceLevel = logrus.Level(uint32(logrus.DebugLevel + 1))
+
+// RFC3339NanoFixed is time.RFC3339Nano with nanoseconds padded using zeros to
+// ensure the formatted time is always the same number of characters.
+const RFC3339NanoFixed = "2006-01-02T15:04:05.000000000Z07:00"
+
+// ParseLevel takes a string level and returns the Logrus log level constant.
+// It supports trace level.
+func ParseLevel(lvl string) (logrus.Level, error) {
+	if lvl == "trace" {
+		return TraceLevel, nil
+	}
+	return logrus.ParseLevel(lvl)
+}
+
+// WithLogger returns a new context with the provided logger. Use in
+// combination with logger.WithField(s) for great effect.
+func WithLogger(ctx context.Context, logger *logrus.Entry) context.Context {
+	return context.WithValue(ctx, loggerKey{}, logger)
+}
+
+// GetLogger retrieves the current logger from the context. If no logger is
+// available, the default logger is returned.
+func GetLogger(ctx context.Context) *logrus.Entry {
+	logger := ctx.Value(loggerKey{})
+
+	if logger == nil {
+		return L
+	}
+
+	return logger.(*logrus.Entry)
+}
+
+// Trace logs a message at level Trace with the log entry passed-in.
+func Trace(e *logrus.Entry, args ...interface{}) {
+	level := logrus.Level(atomic.LoadUint32((*uint32)(&e.Logger.Level)))
+	if level >= TraceLevel {
+		e.Debug(args...)
+	}
+}
+
+// Tracef logs a message at level Trace with the log entry passed-in.
+func Tracef(e *logrus.Entry, format string, args ...interface{}) {
+	level := logrus.Level(atomic.LoadUint32((*uint32)(&e.Logger.Level)))
+	if level >= TraceLevel {
+		e.Debugf(format, args...)
+	}
+}