ino: do not generate easy_install.pth

see Homebrew/homebrew#29518

- use resources for python dependencies as in the ansible formula
- omit options as per [the wiki][] because ordereddict's setup.py does not recognize them

[the wiki]:
https://github.com/Homebrew/homebrew/wiki/Homebrew-and-Python#if-the-software-provides-a-setuppy

Closes Homebrew/homebrew#30218.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>

Formula/ino.rb

@@ -8,13 +8,57 @@ class Ino < Formula
   depends_on "picocom"
   depends_on :python if MacOS.version <= :snow_leopard
 
+  resource "argparse" do
+    url "https://pypi.python.org/packages/source/a/argparse/argparse-1.2.1.tar.gz"
+    sha1 "caadac82aa2576d6b445058c1fcf6ef0b14dbaa1"
+  end
+
+  resource "ordereddict" do
+    url "https://pypi.python.org/packages/source/o/ordereddict/ordereddict-1.1.tar.gz"
+    sha1 "ab90b67dceab55a11b609d253846fa486eb980c4"
+  end
+
+  resource "configobj" do
+    url "https://pypi.python.org/packages/source/c/configobj/configobj-5.0.5.tar.gz"
+    sha1 "a3a1dbe1444932b7c87e4c35fe6f64cf029d9559"
+  end
+
+  resource "pyserial" do
+    url "https://pypi.python.org/packages/source/p/pyserial/pyserial-2.7.tar.gz"
+    sha1 "f15694b1bea9e4369c1931dc5cf09e37e5c562cf"
+  end
+
+  resource "six" do
+    url "https://pypi.python.org/packages/source/s/six/six-1.7.2.tar.gz"
+    sha1 "6ed970106d18e48b361b09c227dac83b4cc72f26"
+  end
+
+  resource "markupsafe" do
+    url "https://pypi.python.org/packages/source/M/MarkupSafe/MarkupSafe-0.23.tar.gz"
+    sha1 "cd5c22acf6dd69046d6cb6a3920d84ea66bdf62a"
+  end
+
+  resource "jinja2" do
+    url "https://pypi.python.org/packages/source/J/Jinja2/Jinja2-2.7.3.tar.gz"
+    sha1 "25ab3881f0c1adfcf79053b58de829c5ae65d3ac"
+  end
+
   def install
     ENV["PYTHONPATH"] = lib+"python2.7/site-packages"
-    ENV.prepend_create_path "PYTHONPATH", lib+"python2.7/site-packages"
+    ENV.prepend_create_path "PYTHONPATH", libexec+"lib/python2.7/site-packages"
+    ENV.prepend_create_path "PYTHONPATH", prefix+"lib/python2.7/site-packages"
+    install_args = ["setup.py", "install", "--prefix=#{libexec}"]
+
+    res = %w[argparse ordereddict configobj pyserial jinja2 six markupsafe]
+    res.each do |r|
+      resource(r).stage { system "python", *install_args }
+    end
 
     system "python", "setup.py", "install", "--prefix=#{prefix}"
 
-    bin.env_script_all_files(libexec+'bin', :PYTHONPATH => ENV['PYTHONPATH'])
+    rm Dir["#{lib}/python2.7/site-packages/*.pth"]
+
+    bin.env_script_all_files(libexec+"bin", :PYTHONPATH => ENV["PYTHONPATH"])
   end
 
   test do