Add find-script.el

lisp/find-script.el

@@ -0,0 +1,36 @@
+;;; find-script.el --- Find a script in $PATH -*- lexical-binding: t; -*-
+
+;;; Commentary:
+
+;; This package makes it easier to find a script to edit in $PATH.  The initial
+;; `rehash-exes' is slow, but it's stored in `*exes*' as a caching mechanism.
+;; However, I'm sure it could be improved.
+
+;; In addition, `*exes*' currently contains /all/ executables in $PATH, which
+;; ... maybe only the ones stored in some text format should be shown.
+
+;;; Code:
+
+(defvar *exes* nil
+  "All the exectuables in $PATH.
+Run `rehash-exes' to refresh this variable.")
+
+(defun rehash-exes ()
+  "List all the executables in $PATH.
+Also sets `*exes*' parameter."
+  (setq *exes*
+        (cl-loop for dir in exec-path
+                 append (file-expand-wildcards (concat dir "*"))
+                 into exes
+                 finally return exes)))
+
+;;;###autoload
+(defun find-script (script)
+  "Find a file in $PATH."
+  (interactive
+   (list (let ((exes (or *exes* (rehash-exes))))
+           (completing-read "Script> " exes nil t))))
+  (find-file script))
+
+(provide 'find-script)
+;;; find-script.el ends here