Change recompile-files shell script to pure Elisp

It still calls `find(1)`, but everything else is Elisp. This means it is
generally faster. It still has some buffer processing overhead, though.

lisp/recompile-files.el

@@ -0,0 +1,26 @@
+(defun recompile-stale-elcs ()
+  (interactive)
+
+  (with-temp-buffer
+    (setq-local default-directory user-emacs-directory)
+
+    (let ((find-command (find-cmd '(prune (name ".git"))
+                                  '(name "*.elc"))))
+
+      (shell-command find-command t t))
+
+    (goto-char (point-min))
+
+    (setq more-lines t)
+
+    (while more-lines
+      (let ((start (progn (beginning-of-line)
+                          (point)))
+            (end (progn (end-of-line)
+                        (point))))
+        (let ((el (buffer-substring start (- end 1)))
+              (elc (buffer-substring start end)))
+
+          (if (file-newer-than-file-p el elc)
+              (byte-compile-file (buffer-substring start (- end 1))))))
+      (setq more-lines (= 0 (forward-line 1))))))

recompile-files.sh

@@ -1,22 +0,0 @@
-#! /bin/sh
-
-cd `dirname $0`
-pwd=`pwd`
-
-for file in `find -iname '*.elc'`
-do
-    elc=`basename "$file"`
-    el="${elc%c}"
-    dir=`dirname "$file"`
-
-    cd "$dir"
-
-    if test "$elc" -ot "$el"
-    then
-        echo "Recompiling ${el}"
-
-        emacs --batch --eval '(byte-compile-file "'${el}'")'
-    fi
-
-    cd $pwd
-done