boot v2 progress: disks, ssh, success...

run.go

@@ -0,0 +1,18 @@
+package main
+
+import (
+	"encoding/json"
+	"os/exec"
+)
+
+func runJSON(v interface{}, cmd string, args ...string) (err error) {
+	c := exec.Command(cmd, args...)
+	c.Stderr = stderr
+	ba, err := c.Output()
+	if err != nil {
+		return
+	}
+
+	err = json.Unmarshal(ba, v)
+	return
+}