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/post.go

@@ -0,0 +1,48 @@
+package main
+
+import (
+	"git.laidback.moe/shinyoukai/mikuru"
+	"go.yarn.social/client"
+	"github.com/tj/go-editor"
+	log "github.com/sirupsen/logrus"
+	"github.com/spf13/cobra"
+)
+
+var postCmd = &cobra.Command{
+	Use: "post",
+	Aliases: []string{"tweet"},
+	Short: "Publish a new post to a Yarn pod",
+	Run: func(_ *cobra.Command, args []string) {
+		cli, err := client.NewClient(
+			client.WithURI(mikuru.Config.Host),
+			client.WithToken(mikuru.Config.Token),
+		)
+		if err != nil {
+			log.Fatal("Unable to create client", err)
+		}
+		write(cli)
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(postCmd)
+	mikuru.ConfInit()
+}
+
+func write(cli *client.Client) {
+	var post string
+
+	data, err := editor.Read()
+	
+	if err != nil {
+		log.Fatal("Unable to read content from editor", err)
+	}
+
+	post = string(data)
+
+	_, err = cli.Post(post, "")
+
+	if err != nil {
+		log.Fatal("Unable to publish tweet", err)
+	}
+}