727f0a536e
github.com/docker/docker/pkg/archive requires Sirupsen/logrus. So let's remove sirupsen/logrus at the moment. Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>
81 lines
2.1 KiB
Go
81 lines
2.1 KiB
Go
package log
|
|
|
|
import (
|
|
"context"
|
|
"path"
|
|
|
|
"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{}
|
|
moduleKey struct{}
|
|
)
|
|
|
|
// 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)
|
|
}
|
|
|
|
// WithModule adds the module to the context, appending it with a slash if a
|
|
// module already exists. A module is just an roughly correlated defined by the
|
|
// call tree for a given context.
|
|
//
|
|
// As an example, we might have a "node" module already part of a context. If
|
|
// this function is called with "tls", the new value of module will be
|
|
// "node/tls".
|
|
//
|
|
// Modules represent the call path. If the new module and last module are the
|
|
// same, a new module entry will not be created. If the new module and old
|
|
// older module are the same but separated by other modules, the cycle will be
|
|
// represented by the module path.
|
|
func WithModule(ctx context.Context, module string) context.Context {
|
|
parent := GetModulePath(ctx)
|
|
|
|
if parent != "" {
|
|
// don't re-append module when module is the same.
|
|
if path.Base(parent) == module {
|
|
return ctx
|
|
}
|
|
|
|
module = path.Join(parent, module)
|
|
}
|
|
|
|
ctx = WithLogger(ctx, GetLogger(ctx).WithField("module", module))
|
|
return context.WithValue(ctx, moduleKey{}, module)
|
|
}
|
|
|
|
// GetModulePath returns the module path for the provided context. If no module
|
|
// is set, an empty string is returned.
|
|
func GetModulePath(ctx context.Context) string {
|
|
module := ctx.Value(moduleKey{})
|
|
if module == nil {
|
|
return ""
|
|
}
|
|
|
|
return module.(string)
|
|
}
|