feat(remove.go): added removing packages

remove.go

@@ -0,0 +1,45 @@
+package main
+
+import (
+	"errors"
+	"net"
+	"os"
+	"path/filepath"
+)
+
+func removeMap(conn net.Conn, instance string, objmap map[string]interface{}) error {
+	program, has := objmap["package"]
+	if !has {
+		return errors.New("a package is required")
+	}
+
+	keep_data, has := objmap["keep_data"]
+	if !has {
+		keep_data = false
+	}
+
+	return remove(conn, instance, program.(string), keep_data.(bool))
+}
+
+func remove(conn net.Conn, instance string, program string, keep_data bool) error {
+	package_path, err := filepath.Abs(filepath.Join(instance, "apps", program))
+	if err != nil {
+		return err
+	}
+	if exists, err := exists(package_path); !exists || err != nil {
+		return errors.New("package not found")
+	}
+	err = os.RemoveAll(package_path)
+	if err != nil {
+		return err
+	}
+	var_path, err := filepath.Abs(filepath.Join(instance, "var", program))
+	if exists, err := exists(var_path); exists && err == nil && !keep_data {
+		err = os.RemoveAll(var_path)
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}