Use Brewfile

The idea is from `brew bundle`. See
Homebrew/legacy-homebrew#30815.

Also rename `brews` command to `formulae`.

Brewfile

@@ -0,0 +1,26 @@
+update
+upgrade
+
+# Mac OS X
+install reattach-to-user-namespace
+
+# Tools
+install git
+install grep --default-names
+install wget
+install autojump --HEAD
+install imagemagick
+install zsh
+install tmux
+
+# Node.js
+install node
+
+# Keybase (Requires Node.js)
+install keybase
+
+# Vim
+install lua
+install vim --with-lua --with-tcl
+
+cleanup

README.md

@@ -36,7 +36,7 @@ Command option | Description
 ---------------|-----------------------------------------------
 `link`         | Install symbolic links
 `brew`         | Install Homebrew
-`brews`        | Install brews
+`formulae`     | Install Homebrew formulae using Brewfile
 `npm`          | Install global Node.js packages
 `ntfs`         | Install ntfs-3g to write to NTFS external disk
 `rbenv`        | Install rbenv
@@ -72,11 +72,11 @@ If you want to install [Homebrew](http://brew.sh),
 ./install.sh brew
 ```
 
-Then install brews with:
+Then install Homebrew formulae with:
 
 ``` sh
 rvm use system # To compile Vim with Ruby support
-./install.sh brews
+./install.sh formulae
 ```
 
 ### Ruby

install.sh

@@ -84,11 +84,11 @@ case "$1" in
   brew)
     ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
     ;;
-  brews)
-    while read LINE; do
-      [[ -z "$LINE" || ${LINE:0:1} == '#' ]] && continue
-      brew install $LINE
-    done < brews
+  formulae)
+    while read COMMAND; do
+      [[ -z "$COMMAND" || ${COMMAND:0:1} == '#' ]] && continue
+      brew $COMMAND
+    done < Brewfile
     echo 'Done.'
     ;;
   npm)
@@ -147,13 +147,13 @@ case "$1" in
     echo "usage: $(basename $0) <command>"
     echo ''
     echo 'Available commands:'
-    echo '    link    Install symbolic links'
-    echo '    brew    Install Homebrew'
-    echo '    brews   Install brews'
-    echo '    npm     Install global Node.js packages'
-    echo '    ntfs    Install ntfs-3g to write to NTFS external disk'
-    echo '    rbenv   Install rbenv'
-    echo '    rvm     Install RVM'
-    echo '    vim     Install Vim environments'
+    echo '    link      Install symbolic links'
+    echo '    brew      Install Homebrew'
+    echo '    formulae  Install Homebrew formulae using Brewfile'
+    echo '    npm       Install global Node.js packages'
+    echo '    ntfs      Install ntfs-3g to write to NTFS external disk'
+    echo '    rbenv     Install rbenv'
+    echo '    rvm       Install RVM'
+    echo '    vim       Install Vim environments'
     ;;
 esac