Ignore extra bash code from openrc

If a user has additional code in their openrc file that isn't just bash
variables, the auth provider might fail while parsing it. This change
updates the logic to only try and parse lines with OS_ in it to make
sure that extra things like bash code are ignored.

Change-Id: Id6f5406dcf15642bc0d70caeac30224114bb0669
Closes-Bug: #1699950

lib/puppet/provider/openstack/auth.rb

@@ -16,10 +16,13 @@ module Puppet::Provider::Openstack::Auth
     rcfile = [filename, '/root/openrc'].detect { |f| File.exists? f }
     unless rcfile.nil?
       File.open(rcfile).readlines.delete_if{|l| l=~ /^#|^$/ }.each do |line|
-        key, value = line.split('=')
-        key = key.split(' ').last
-        value = value.chomp.gsub(/'/, '')
-        env.merge!(key => value) if key =~ /OS_/
+        # we only care about the OS_ vars from the file LP#1699950
+        if line =~ /OS_/
+          key, value = line.split('=')
+          key = key.split(' ').last
+          value = value.chomp.gsub(/'/, '')
+          env.merge!(key => value) if key =~ /OS_/
+        end
       end
     end
     return env

releasenotes/notes/fix-openrc-parsing-2cc3a95b3bf2b259.yaml

@@ -0,0 +1,5 @@
+---
+fixes:
+  - |
+    Improve openrc parsing to prevent issues when additional bash code is
+    present in a user's openrc file. LP#1699950

spec/unit/provider/openstack/auth_spec.rb

@@ -102,6 +102,22 @@ describe Puppet::Provider::Openstack::Auth do
       end
     end
 
+    context 'with a valid RC file with extra code in it' do
+      it 'provides a hash' do
+        mock = "export OS_USERNAME='test'\nexport OS_PASSWORD='abc123'\nexport OS_PROJECT_NAME='test'\nexport OS_AUTH_URL='http://127.0.0.1:5000'\n_openstack() {\n foo\n} "
+        filename = 'file'
+        File.expects(:exists?).with('file').returns(true)
+        File.expects(:open).with('file').returns(StringIO.new(mock))
+
+        response = klass.get_os_vars_from_rcfile(filename)
+        expect(response).to eq({
+          "OS_AUTH_URL"     => "http://127.0.0.1:5000",
+          "OS_PASSWORD"     => "abc123",
+          "OS_PROJECT_NAME" => "test",
+          "OS_USERNAME"     => "test"})
+      end
+    end
+
     context 'with an empty file' do
       it 'provides an empty hash' do
         filename = 'file'