new manage_requirements argument to address issue 273

README.md

@@ -128,6 +128,8 @@ Installs and manages Python packages from requirements file.
 
 **group** - The group that was used to create the virtualenv.  This is used to create the requirements file with correct permissions if it's not present already.
 
+**manage_requirements** - Create the requirements file if it doesn't exist. Default: true
+
 ```puppet
   python::requirements { '/var/www/project1/requirements.txt' :
     virtualenv => '/var/www/project1',

manifests/requirements.pp

@@ -38,6 +38,9 @@
 # [*extra_pip_args*]
 # Extra arguments to pass to pip after the requirements file
 #
+# [*manage_requirements*]
+# Create the requirements file if it doesn't exist. Default: true
+#
 # [*fix_requirements_owner*]
 # Change owner and group of requirements file. Default: true
 #
@@ -71,6 +74,7 @@
   $forceupdate            = false,
   $cwd                    = undef,
   $extra_pip_args         = '',
+  $manage_requirements    = true,
   $fix_requirements_owner = true,
   $log_dir                = '/tmp',
   $timeout                = 1800,
@@ -110,7 +114,7 @@
 
   # This will ensure multiple python::virtualenv definitions can share the
   # the same requirements file.
-  if !defined(File[$requirements]) {
+  if !defined(File[$requirements]) and $manage_requirements == true {
     file { $requirements:
       ensure  => present,
       mode    => '0644',