gotosocial/internal/log/log.go
2021-03-03 18:12:02 +01:00

59 lines
1.8 KiB
Go

/*
GoToSocial
Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package log
import (
"bytes"
"os"
"github.com/sirupsen/logrus"
)
// New returns a new logrus logger with the specified level,
// or an error if that level can't be parsed
func New(level string) (*logrus.Logger, error) {
log := logrus.New()
log.SetOutput(&outputSplitter{})
return setLogLevel(level, log)
}
// outputSplitter implements the io.Writer interface for use with Logrus, and simply
// splits logs between stdout and stderr depending on their severity.
// See: https://github.com/sirupsen/logrus/issues/403#issuecomment-346437512
type outputSplitter struct{}
func (splitter *outputSplitter) Write(p []byte) (n int, err error) {
if bytes.Contains(p, []byte("level=error")) {
return os.Stderr.Write(p)
}
return os.Stdout.Write(p)
}
// setLogLevel will try to set the logrus log level to the
// desired level specified by the user with the --log-level flag
func setLogLevel(level string, logger *logrus.Logger) (*logrus.Logger, error) {
log := logrus.New()
logLevel, err := logrus.ParseLevel(level)
if err != nil {
return nil, err
}
log.SetLevel(logLevel)
return log, nil
}