100 lines
1.7 KiB
Go
100 lines
1.7 KiB
Go
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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"strings"
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"sync"
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"time"
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"github.com/pkg/errors"
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)
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type Logger struct {
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file io.WriteCloser
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toStdout bool
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mut sync.Mutex
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}
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// NewLogger creates a Logger instance with given filename and
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// toStdout tells wether to write to Stdout as well or not.
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func NewLogger(path string, toStdout bool) (*Logger, error) {
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f, err := os.OpenFile(path, os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0660)
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if err != nil {
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return nil, errors.Wrap(err, "failed to open log file")
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}
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return &Logger{file: f, toStdout: toStdout}, nil
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}
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func (l *Logger) Println(v ...interface{}) {
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l.mut.Lock()
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defer l.mut.Unlock()
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nowStr := time.Now().UTC().Format(time.RFC3339)
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fmt.Fprintln(l.file, nowStr, v)
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if l.toStdout {
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fmt.Println(v...)
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}
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}
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func (l *Logger) Printf(format string, v ...interface{}) {
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l.mut.Lock()
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defer l.mut.Unlock()
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// Ensure a new line will be written
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if !strings.HasSuffix(format, "\n") {
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format += "\n"
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}
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nowStr := time.Now().UTC().Format(time.RFC3339)
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fmt.Fprintf(l.file, nowStr+" "+format, v...)
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if l.toStdout {
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fmt.Printf(format, v...)
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}
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}
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func (l *Logger) Fatalln(v ...interface{}) {
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l.mut.Lock()
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nowStr := time.Now().UTC().Format(time.RFC3339)
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fmt.Fprintln(l.file, nowStr, v)
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if l.toStdout {
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fmt.Println(v...)
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}
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l.file.Close()
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os.Exit(1)
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}
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func (l *Logger) Fatalf(format string, v ...interface{}) {
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l.mut.Lock()
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// Ensure a new line will be written
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if !strings.HasSuffix(format, "\n") {
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format += "\n"
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}
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nowStr := time.Now().UTC().Format(time.RFC3339)
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fmt.Fprintf(l.file, nowStr+" "+format, v...)
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if l.toStdout {
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fmt.Printf(format, v...)
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}
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l.file.Close()
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os.Exit(1)
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}
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func (l *Logger) Close() error {
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return l.file.Close()
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}
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