Add compact command

main.go

@@ -70,6 +70,21 @@ func main() {
 				return nil
 			},
 		},
+		{
+			Name:    "compact",
+			Aliases: []string{"c"},
+			Usage:   "compact all notebook",
+			Action: func(c *cli.Context) error {
+				Initialize(configPath, debug)
+
+				for _, notebook := range stick.Notebooks {
+					notebook.Compact()
+				}
+
+				fmt.Println("notebooks compacted")
+				return nil
+			},
+		},
 		{
 			Name:    "resolve",
 			Aliases: []string{"r"},

notebook.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"os/exec"
 	"strings"
 
 	"github.com/pkg/errors"
@@ -176,3 +177,12 @@ func (n *Notebook) File(id string) *object.File {
 
 	return file
 }
+
+func (n *Notebook) Compact() {
+	tree, err := n.Repository.Worktree()
+	CheckError(err)
+
+	cmd := exec.Command("git", "-C", tree.Filesystem.Root(), "gc", "--aggressive", "--prune=now")
+	err = cmd.Run()
+	CheckError(err)
+}