Switch to Cobra

Also:
- Fixed the Makefile
- Added a Taskfile.yml (see: https://taskfile.dev)
- Updated the manual page

Signed-off-by: Shin'ya Minazuki <shinyoukai@laidback.moe>

cmd/login.go

@@ -0,0 +1,70 @@
+package main
+
+import (
+	"fmt"
+	"strings"
+	"syscall"
+
+	"golang.org/x/term"
+	"go.yarn.social/client"
+	"git.laidback.moe/shinyoukai/mikuru"
+
+	log "github.com/sirupsen/logrus"
+	"github.com/spf13/cobra"
+)
+
+var (
+	username string
+	password string
+)
+
+var loginCmd = &cobra.Command{
+	Use: "login",
+	Short: "Authenticate against a Yarn.social pod",
+	Aliases: []string{"auth", "signin"},
+	Args: cobra.MaximumNArgs(0),
+	Run: func(_ *cobra.Command, _ []string) {
+		cli, err := client.NewClient(client.WithURI(mikuru.Config.Host))
+		if err != nil {
+			log.Fatal("Unable to create client", err)
+		}
+		signin(cli)
+	},
+}
+
+func init() {
+	mikuru.ConfInit()
+	rootCmd.AddCommand(loginCmd)
+}
+
+
+func signin(cli *client.Client) {
+	fmt.Printf("Username: ")
+	fmt.Scanln(&username)
+
+	if len(username) == 0 {
+		log.Fatal("No value. Bailing out")
+	}
+
+	fmt.Printf("Password: ")
+	data, err := term.ReadPassword(int(syscall.Stdin))
+	if err != nil {
+		log.Fatal("Unable to obtain password", err)
+	}
+
+	password := string(data)
+
+	res, err := cli.Login(username, password)
+	
+	if err != nil {
+		log.Fatal("Unable to login", err)
+	}
+
+	token := strings.Trim(fmt.Sprintf(res.Token), "{}")
+
+	fmt.Println("Login successful")
+	fmt.Println("Place this token in your configuration file for later use")
+	fmt.Println("Do not share it with anyone, it's classified information!")
+	fmt.Println("")
+	fmt.Printf("token = %v\n", token)
+}