V1 error :cannot use ([]cli.Command literal)

[AchalaSB]

my urfave/cli version is

version v1
Getting error in v1 version. The same code I ran 15days before it was working fine. but now its not working. I haven't changed the version.

package main

import (
	"fmt"
	"log"
	"os"

	"github.com/urfave/cli"
)

func main() {
	app := cli.NewApp()

	app.Commands = []cli.Command{
		{
			Name:    "add",
			Aliases: []string{"a"},
			Usage:   "add a task to the list",
			Flags: []cli.Flag{
				cli.StringFlag{Name: "message, m"},
			},
			Action: func(c *cli.Context) error {
				fmt.Println("added task: ", c.Args().First())
				return nil
			},
		},
		{
			Name:    "complete",
			Aliases: []string{"c"},
			Usage:   "complete a task on the list",
			Action: func(c *cli.Context) error {
				fmt.Println("completed task: ", c.Args().First())
				return nil
			},
		},
	}

	err := app.Run(os.Args)
	if err != nil {
		log.Fatal(err)
	}
}

error log

cannot use ([]cli.Command literal) (value of type []cli.Command) as []*cli.Command value in assignment
cannot use (cli.StringFlag literal) (value of type cli.StringFlag) as cli.Flag value in array or slice literal: missing method Apply

Run go version and paste its output here

go version go1.13.4 linux/amd64

Run go env and paste its output here

GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/home/achala/.cache/go-build"
GOENV="/home/achala/.config/go/env"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/home/achala/go/"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build979489797=/tmp/go-build -gno-record-gcc-switches"

[coilysiren]

@AchalaSB []cli.Command was changed to []*cli.Command in v2, please do either of the following things:

• look through this issue Create a short guide on how to pin urfave/cli v1 #928 to figure out how to pin v1, because the error you are receiving is from trying to run v1 code with v2 of the package
• look through this issue Create a v1 => v2 migration guide #921 for examples of how to upgrade to v2, because the error you are getting is coming from v2

[abdennour]

For me i get similar error, but it's nothing to do with migration.

Simply, it's was a typo that the function does not return error in its signature:

// issue
func DetectPrintln(ctx *cli.Context) {

// OK
func DetectPrintln(ctx *cli.Context) error {