Experimental support for SCL repositories on RHEL and CentOS

README.md

@@ -278,6 +278,14 @@ python::python_pips:
     virtualenv: "/opt/env2"
 ```
 
+### Using SCL packages from RedHat or CentOS
+
+To use this module with the Red Hat Software Collections (SCL) or the CentOS
+equivalents, set python::provider to 'scl' and python::version to the name of
+the collection you want to use (e.g., 'python27', 'python33', or
+'rh-python34').
+
+
 ## Authors
 
 [Sergey Stankevich](https://github.com/stankevich) | [Shiva Poudel](https://github.com/shivapoudel) | [Garrett Honeycutt](http://learnpuppet.com)

manifests/init.pp

@@ -72,12 +72,13 @@
 
   # validate inputs
   if $provider != undef {
-    validate_re($provider, ['^pip$'], 'Only "pip" is a valid provider besides the system default.')
+    validate_re($provider, ['^(pip|scl)$'], 'Only "pip" or "scl" are valid providers besides the system default.')
   }
 
   if $provider == 'pip' {
     validate_re($version, ['^(2\.[4-7]\.\d|3\.\d\.\d)$','^system$'])
-  # this will only be checked if not pip, every other string would be rejected by provider check
+  } elsif $provider == 'scl' {
+    validate_re($version, concat(['python33', 'python27', 'rh-python34'], $valid_versions))
   } else {
     validate_re($version, concat(['system', 'pypy'], $valid_versions))
   }

manifests/install.pp

@@ -61,6 +61,46 @@
       package { 'pip': ensure => latest, provider => pip }
       package { "python==${python::version}": ensure => latest, provider => pip }
     }
+    scl: {
+      # SCL is only valid in the RedHat family. If RHEL, package must be
+      # enabled using the subscription manager outside of puppet. If CentOS,
+      # the centos-release-SCL will install the repository.
+      $install_scl_repo_package = $::operatingsystem ? {
+          'CentOS' => present,
+          default  => absent,
+      }
+
+      package { 'centos-release-SCL':
+        ensure => $install_scl_repo_package,
+        before => Package['scl-utils'],
+      }
+      package { 'scl-utils': ensure => latest, }
+      package { $::python::version:
+        ensure  => present,
+        require => Package['scl-utils'],
+      }
+      # This gets installed as a dependency anyway
+      # package { "${python::version}-python-virtualenv":
+      #   ensure  => $venv_ensure,
+      #   require => Package['scl-utils'],
+      # }
+      package { "${python::version}-scldev":
+        ensure  => $dev_ensure,
+        require => Package['scl-utils'],
+      }
+      # This looks absurd but I can't figure out a better way
+      $pip_exec_onlyif = $pip_ensure ? {
+          present => '/bin/true',
+          default => '/bin/false',
+      }
+      exec { 'python-scl-pip-install':
+        require => Package['scl-utils'],
+        command => "scl enable ${python::version} -- easy_install pip",
+        path    => ['/usr/bin', '/bin'],
+        onlyif  => $pip_exec_onlyif,
+        creates => "/opt/rh/${python::version}/root/usr/bin/pip",
+      }
+    }
     default: {
       if $::osfamily == 'RedHat' {
         if $pip_ensure == present {

manifests/pyvenv.pp

@@ -61,9 +61,12 @@
 
   if $ensure == 'present' {
 
-    $virtualenv_cmd = $version ? {
-      'system' => 'pyvenv',
-      default  => "pyvenv-${version}",
+    $virtualenv_cmd = $python::provider ? {
+      'scl'   => "scl enable ${python::version} -- pyvenv --clear",
+      default => $version ? {
+        'system' => 'pyvenv',
+        default  => "pyvenv-${version}",
+      }
     }
 
     if ( $systempkgs == true ) {