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flags.go
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flags.go
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// Copyright 2018 ETH Zurich, Anapaya Systems
//
// 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 (
"flag"
"github.com/scionproto/scion/go/lib/serrors"
)
var (
logDir string
logLevel string
logConsole string
logSize int
logAge int
logBackups int
logFlush int
)
var (
ConsoleLevel = DefaultConsoleLevel
)
const (
DefaultConsoleLevel = "crit"
DefaultFileLevel = "debug"
DefaultFileSizeMiB = 50
DefaultFileMaxAgeDays = 7
DefaultFileMaxBackups = 10
DefaultFileFlushSeconds = 5
)
func AddLogConsFlags() {
flag.StringVar(&logConsole, "log.console", ConsoleLevel,
"Console logging level: trace|debug|info|warn|error|crit")
}
func AddLogFileFlags() {
flag.StringVar(&logDir, "log.dir", "logs", "Log directory")
flag.StringVar(&logLevel, "log.level", DefaultFileLevel,
"File logging level: trace|debug|info|warn|error|crit")
flag.IntVar(&logSize, "log.size", DefaultFileSizeMiB, "Max size of log file in MiB")
flag.IntVar(&logAge, "log.age", DefaultFileMaxAgeDays, "Max age of log file in days")
flag.IntVar(&logBackups, "log.backups", DefaultFileMaxBackups,
"Max number of log files to retain")
flag.IntVar(&logFlush, "log.flush", DefaultFileFlushSeconds,
"How frequently to flush to the log file, in seconds")
}
func SetupFromFlags(name string) error {
var err error
if logConsole != "" {
err = SetupLogConsole(logConsole)
if err != nil {
return err
}
}
// if name passed, the caller wants to setup a log file
if name != "" {
if logDir == "" {
return serrors.New("Log dir flag not set")
}
err = SetupLogFile(name, logDir, logLevel, logSize, logAge, logBackups, logFlush)
}
return err
}