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log.go
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log.go
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// (c) Cartesi and individual authors (see AUTHORS)
// SPDX-License-Identifier: Apache-2.0 (see LICENSE)
package config
import (
"fmt"
"io"
"log"
"os"
)
var (
ErrorLogger *log.Logger
WarningLogger *log.Logger
InfoLogger *log.Logger
DebugLogger *log.Logger
)
func init() {
logInit()
}
func logInit() {
var flags int
if GetCartesiLogTimestamp() {
flags = log.LstdFlags
}
ErrorLogger = log.New(os.Stderr, "ERROR ", flags)
WarningLogger = log.New(os.Stderr, "WARN ", flags)
InfoLogger = log.New(os.Stdout, "INFO ", flags)
DebugLogger = log.New(os.Stdout, "DEBUG ", flags)
switch GetCartesiLogLevel() {
case LogLevelError:
WarningLogger.SetOutput(io.Discard)
fallthrough
case LogLevelWarning:
InfoLogger.SetOutput(io.Discard)
fallthrough
case LogLevelInfo:
DebugLogger.SetOutput(io.Discard)
case LogLevelDebug:
flags |= log.Llongfile
ErrorLogger.SetFlags(flags)
WarningLogger.SetFlags(flags)
InfoLogger.SetFlags(flags)
DebugLogger.SetFlags(flags)
default:
panic("Invalid log level")
}
}
type LogLevel uint8
const (
LogLevelDebug LogLevel = iota
LogLevelInfo
LogLevelWarning
LogLevelError
)
func toLogLevelFromString(s string) (LogLevel, error) {
var m = map[string]LogLevel{
"debug": LogLevelDebug,
"info": LogLevelInfo,
"warning": LogLevelWarning,
"error": LogLevelError,
}
if v, ok := m[s]; ok {
return v, nil
} else {
var zeroValue LogLevel
return zeroValue, fmt.Errorf(`invalid log level "%s"`, s)
}
}