Fix a reassigned variable

This occurred when $ensure was set to 'absent'. Then the variable used
for the title of the exec resource was assigned twice, resulting in an
error.

manifests/pip.pp

@@ -174,8 +174,6 @@
   $pip_install = "${pip_env} --log ${log}/pip.log install"
   $pip_common_args = "${pypi_index} ${proxy_flag} ${install_args} ${install_editable} ${source}"
 
-  $pip_exec_name = "pip_install_${name}"
-
   # Explicit version out of VCS when PIP supported URL is provided
   if $source =~ /^'(git\+|hg\+|bzr\+|svn\+)(http|https|ssh|svn|sftp|ftp|lp|git)(:\/\/).+'$/ {
     if $_ensure != present and $_ensure != latest {
@@ -221,14 +219,19 @@
 
       default: {
         # Anti-action, uninstall.
-        $pip_exec_name = "pip_uninstall_${name}"
+        $uninstall = true
         $command = "echo y | ${pip_env} uninstall ${uninstall_args} ${proxy_flag} ${name}"
         $unless_command = "! ${pip_env} list | grep -i -e '${grep_regex}'"
       }
     }
   }
 
-  exec { $pip_exec_name:
+  $pip_installer = (defined('$uninstall')) ? {
+    true  => "pip_uninstall_${name}",
+    false => "pip_install_${name}",
+  }
+
+  exec { $pip_installer:
     command     => $command,
     unless      => $unless_command,
     user        => $owner,

spec/defines/pip_spec.rb

@@ -106,6 +106,16 @@
         it { is_expected.to contain_exec('pip_install_rpyc').with_unless(%r{wordpress-json}) }
       end
     end
+
+    describe 'uninstall' do
+      context 'adds correct title' do
+        let(:params) { { ensure: 'absent' } }
+
+        it { is_expected.not_to contain_exec('pip_install_rpyc') }
+
+        it { is_expected.to contain_exec('pip_uninstall_rpyc').with_command(%r{uninstall.*rpyc$}) }
+      end
+    end
   end
 end