editor/emacs: refactor + don't install HEAD w/ homebrew

editor/emacs/install

@@ -3,7 +3,7 @@
 case "$OSTYPE" in
     darwin*)
         brew tap railwaycat/emacsmacport
-        brew install emacs-mac --with-imagemagick --with-modern-icon --HEAD
+        brew install emacs-mac --with-imagemagick --with-modern-icon
         ;;
     linux*)
         if [[ -f /etc/arch-release ]]; then
@@ -16,6 +16,5 @@ esac
 
 if [[ ! -d "$HOME/.emacs.d" ]]; then
     git clone --recursive "hlissner/.emacs.d" "$HOME/.emacs.d"
-    cd "$HOME/.emacs.d"
-    make install
+    cd "$HOME/.emacs.d" && make install
 fi

editor/emacs/update

@@ -1,3 +1,3 @@
 #!/usr/bin/env bash
-[[ -d ~/.emacs.d ]] && { cd ~/.emacs.d && YES=1 make update; }
+[[ -f ~/.emacs.d/Makefile ]] && { cd ~/.emacs.d && YES=1 make update; }