github.com/ethereumproject/go-ethereum@v5.5.2+incompatible/logger/log.go (about)

     1  // Copyright 2015 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package logger
    18  
    19  import (
    20  	"fmt"
    21  	"io"
    22  	"os"
    23  
    24  	"github.com/ethereumproject/go-ethereum/common"
    25  )
    26  
    27  func openFile(datadir string, filename string) *os.File {
    28  	path := common.EnsurePathAbsoluteOrRelativeTo(datadir, filename)
    29  	file, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0666)
    30  	if err != nil {
    31  		panic(fmt.Sprintf("error opening log file '%s': %v", filename, err))
    32  	}
    33  	return file
    34  }
    35  
    36  func New(datadir string, logFile string, logLevel int, flags int) LogSystem {
    37  	var writer io.Writer
    38  	if logFile == "" {
    39  		writer = os.Stdout
    40  	} else {
    41  		writer = openFile(datadir, logFile)
    42  	}
    43  
    44  	var sys LogSystem
    45  	sys = NewStdLogSystem(writer, flags, LogLevel(logLevel))
    46  	AddLogSystem(sys)
    47  
    48  	return sys
    49  }
    50  
    51  func BuildNewMLogSystem(datadir string, logFile string, logLevel int, flags int, withTimestamp bool) LogSystem {
    52  	var writer io.Writer
    53  	if logFile == "" {
    54  		writer = os.Stdout
    55  	} else {
    56  		writer = openFile(datadir, logFile)
    57  	}
    58  
    59  	var sys LogSystem
    60  	sys = NewMLogSystem(writer, flags, LogLevel(logLevel), withTimestamp)
    61  	AddLogSystem(sys)
    62  
    63  	return sys
    64  }
    65  
    66  func NewJSONsystem(datadir string, logFile string) LogSystem {
    67  	var writer io.Writer
    68  	if logFile == "-" {
    69  		writer = os.Stdout
    70  	} else {
    71  		writer = openFile(datadir, logFile)
    72  	}
    73  
    74  	var sys LogSystem
    75  	sys = NewJsonLogSystem(writer)
    76  	AddLogSystem(sys)
    77  
    78  	return sys
    79  }
    80  
    81  const (
    82  	reset   = "\x1b[39m"
    83  	green   = "\x1b[32m"
    84  	blue    = "\x1b[36m"
    85  	yellow  = "\x1b[33m"
    86  	red     = "\x1b[31m"
    87  	magenta = "\x1b[35m"
    88  )
    89  
    90  func ColorGreen(s string) (coloredString string) {
    91  	return green + s + reset
    92  }
    93  func ColorRed(s string) (coloredString string) {
    94  	return red + s + reset
    95  }
    96  func ColorBlue(s string) (coloredString string) {
    97  	return blue + s + reset
    98  }
    99  func ColorYellow(s string) (coloredString string) {
   100  	return yellow + s + reset
   101  }
   102  func ColorMagenta(s string) (coloredString string) {
   103  	return magenta + s + reset
   104  }