fix go.mod error

go.mod

module github.com/skanehira/docui

go 1.12

require (
	github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78 // indirect
	github.com/Microsoft/go-winio v0.4.14 // indirect
	github.com/Sirupsen/logrus v1.4.2
	github.com/docker/distribution v2.7.1+incompatible // indirect
	// v17.05.0-ce
	github.com/docker/docker v0.0.0-20170504205632-89658bed64c2
	github.com/docker/go-connections v0.4.0
	github.com/docker/go-units v0.4.0 // indirect
	github.com/docker/libtrust v0.0.0-20160708172513-aabc10ec26b7 // indirect
	github.com/gdamore/tcell v1.2.0
	github.com/jroimartin/gocui v0.4.0
	github.com/micmonay/keybd_event v0.0.0-20190804163414-202c5b2c8150
	github.com/mitchellh/go-homedir v1.1.0
	github.com/nsf/termbox-go v0.0.0-20190817171036-93860e161317 // indirect
	github.com/opencontainers/go-digest v1.0.0-rc1 // indirect
	github.com/rivo/tview v0.0.0-20190721135419-23dc8a0944e4
	golang.org/x/net v0.0.0-20190827160401-ba9fcec4b297 // indirect
)

replace github.com/Sirupsen/logrus v1.4.2 => github.com/sirupsen/logrus v1.4.2

logger.go

// common/logger.go
package common

import (
	"os"
	"path/filepath"

	log "github.com/Sirupsen/logrus"
	homedir "github.com/mitchellh/go-homedir"
)

// Logger logger
var Logger *logger

// Logger logger.
type logger struct {
	*os.File
	*log.Logger
}

// NewLogger create new logger.
func NewLogger(logLevel string) {
	level, err := log.ParseLevel(logLevel)
	if err != nil {
		panic(err)
	}

	home, err := homedir.Dir()
	if err != nil {
		panic(err)
	}

	logFile, err := os.OpenFile(filepath.Join(home, "docui.log"), os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0666)

	if err != nil {
		panic(err)
	}

	log.SetFormatter(&log.TextFormatter{
		DisableColors: true,
		FullTimestamp: true,
	})
	log.SetOutput(logFile)
	log.SetLevel(level)
	log.SetReportCaller(true)

	Logger = &logger{
		File:   logFile,
		Logger: log.StandardLogger(),
	}
}