brew-cleanup-installed: Rubify, make internal cmd.

1 files changed, 20 insertions, 0 deletions

diff --git a/Library/Homebrew/cmd/cleanup-installed.rb b/Library/Homebrew/cmd/cleanup-installed.rb
new file mode 100755
index 000000000..b79a380c1
--- /dev/null
+++ b/Library/Homebrew/cmd/cleanup-installed.rb
@@ -0,0 +1,20 @@
+# brew-cleanup-installed: uninstall all non-whitelisted Homebrew formulae.
+#
+# Useful for maintainers/testers who regularly install lots of formulae
+# they don't actually use.
+#
+# Populate ~/.brew-cleanup-installed with the formulae you want to keep
+# installed. All others will be uninstalled when brew-cleanup-installed is run.
+
+module Homebrew
+  def cleanup_installed
+    cleanup_file = Pathname.new "#{ENV["HOME"]}/.brew-cleanup-installed"
+    return unless cleanup_file.exist?
+
+    kept_formulae = cleanup_file.read.lines.map(&:strip)
+    current_formulae = `brew list`.lines.map(&:strip)
+    uninstall_formulae = current_formulae - kept_formulae
+    return if uninstall_formulae.empty?
+    safe_system "brew", "uninstall", *uninstall_formulae
+  end
+end