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/*
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. It also sets
// the output to log.outputSplitter, so you get error logs
// on stderr and normal logs on stdout.
func New(level string) (*logrus.Logger, error) {
log := logrus.New()
log.SetOutput(&outputSplitter{})
logLevel, err := logrus.ParseLevel(level)
if err != nil {
return nil, err
}
log.SetLevel(logLevel)
if logLevel == logrus.TraceLevel {
log.SetReportCaller(true)
}
log.SetFormatter(&logrus.TextFormatter{
DisableColors: true,
ForceQuote: true,
FullTimestamp: true,
})
return log, nil
}
// 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)
}
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