add a migrate script

migrate

@@ -0,0 +1,37 @@
+#!/usr/bin/env emacs --script
+
+(defun read-from-file (file-name)
+  "read one lisp expression from a file"
+  (cond
+   ((file-exists-p file-name)
+    (with-temp-buffer
+      (insert-file-contents-literally file-name)
+      (goto-char (point-min))
+      (car
+       (read-from-string
+        (buffer-substring-no-properties (point-min) (point-max))))))))
+
+(message (prin1-to-string command-line-args-left))
+(when command-line-args-left
+  (let* ((file-name (car command-line-args-left))
+         (config
+          (read-from-file
+           (message (expand-file-name ".config" (expand-file-name file-name "epkgs")))))
+         (master
+          (read-from-file
+           (expand-file-name "master" (expand-file-name file-name "epkgs")))))
+    (princ
+     (pp-to-string
+      (cons
+       (intern file-name)
+       (plist-put
+        (plist-put
+         (plist-put
+          nil
+          :summary
+          (plist-get master :summary))
+         :url
+         (plist-get config :url))
+        :fetcher
+        (plist-get config :fetcher)))
+      ))))