forked from Silverfish/proton-bridge
97 lines
2.8 KiB
Go
97 lines
2.8 KiB
Go
// Copyright (c) 2021 Proton Technologies AG
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//
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// This file is part of ProtonMail Bridge.
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//
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// ProtonMail Bridge is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// ProtonMail Bridge is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with ProtonMail Bridge. If not, see <https://www.gnu.org/licenses/>.
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package logging
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import (
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"fmt"
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"io"
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"os"
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"path/filepath"
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"regexp"
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"time"
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"github.com/ProtonMail/proton-bridge/internal/constants"
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"github.com/sirupsen/logrus"
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"github.com/sirupsen/logrus/hooks/writer"
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)
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const (
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// MaxLogSize defines the maximum log size we should permit.
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// Zendesk has a file size limit of 20MB. When the last N log files are zipped,
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// it should fit under 20MB. So here we permit up to 10MB (most files are a few hundred kB).
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MaxLogSize = 10 * 2 << 20
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// MaxLogs defines how many old log files should be kept.
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MaxLogs = 3
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)
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func Init(logsPath string) error {
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logrus.SetFormatter(&logrus.TextFormatter{
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ForceColors: true,
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FullTimestamp: true,
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TimestampFormat: time.StampMilli,
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})
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logrus.AddHook(&writer.Hook{
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Writer: os.Stderr,
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LogLevels: []logrus.Level{
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logrus.PanicLevel,
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logrus.FatalLevel,
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logrus.ErrorLevel,
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},
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})
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rotator, err := NewRotator(MaxLogSize, func() (io.WriteCloser, error) {
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if err := clearLogs(logsPath, MaxLogs); err != nil {
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return nil, err
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}
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return os.Create(filepath.Join(logsPath, getLogName(constants.Version, constants.Revision)))
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})
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if err != nil {
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return err
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}
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logrus.SetOutput(rotator)
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return nil
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}
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// SetLevel will change the level of logging and in case of Debug or Trace
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// level it will also prevent from writing to file. Setting level to Info or
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// higher will not set writing to file again if it was previously cancelled by
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// Debug or Trace.
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func SetLevel(level string) {
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if lvl, err := logrus.ParseLevel(level); err == nil {
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logrus.SetLevel(lvl)
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}
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if logrus.GetLevel() == logrus.DebugLevel || logrus.GetLevel() == logrus.TraceLevel {
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// The hook to print panic, fatal and error to stderr is always
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// added. We want to avoid log duplicates by replacing all hooks
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_ = logrus.StandardLogger().ReplaceHooks(logrus.LevelHooks{})
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logrus.SetOutput(os.Stderr)
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}
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}
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func getLogName(version, revision string) string {
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return fmt.Sprintf("v%v_%v_%v.log", version, revision, time.Now().Unix())
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}
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func matchLogName(name string) bool {
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return regexp.MustCompile(`^v.*\.log$`).MatchString(name)
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}
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