Remove pkg-info dependency

Author: phikal

elixir-mode.el

@@ -11,7 +11,7 @@
 ;; Created: Mon Nov 7 2011
 ;; Keywords: languages elixir
 ;; Version: 2.4.0
-;; Package-Requires: ((emacs "25") (pkg-info "0.6"))
+;; Package-Requires: ((emacs "25"))
 
 ;; This file is not a part of GNU Emacs.
 
@@ -38,7 +38,6 @@
 
 (require 'easymenu)           ; Elixir Mode menu definition
 (require 'elixir-smie)        ; Syntax and indentation support
-(require 'pkg-info)           ; Display Elixir Mode package version
 (require 'elixir-format)      ; Elixir Format functions
 
 (defgroup elixir nil
@@ -478,7 +477,14 @@ If the version number could not be determined, signal an error,
 if called interactively, or if SHOW-VERSION is non-nil, otherwise
 just return nil."
   (interactive (list t))
-  (let ((version (pkg-info-version-info 'elixir-mode)))
+  (let ((version (eval-when-compile
+		   (or (ignore-errors
+		      (require 'lisp-mnt)
+		      (let ((file (or load-file-name buffer-file-name)))
+			(with-temp-buffer
+			  (insert-file-contents file)
+			  (lm-header "Version"))))
+		       "Unknown"))))
     (when show-version
       (message "Elixir-Mode version: %s" version))
     version))