Support alternative path to emerge tool (also for wrappers).

Signed-off-by: Robin H. Johnson <robbat2@gentoo.org>

manifests/init.pp

@@ -50,6 +50,7 @@ class portage (
   $portage_utils_keywords         = $portage::params::portage_utils_keywords,
   $portage_utils_keywords_version = $portage::params::portage_utils_keywords_version,
   $portage_utils_use              = $portage::params::portage_utils_use,
+  $emerge_command                 = $portage::params::emerge_command,
 ) inherits portage::params {
 
   include ::portage::install
@@ -65,7 +66,7 @@ class portage (
   }
 
   exec { 'changed_makeconf':
-    command     => 'emerge -1 --changed-use $(qlist -vIC | sed \'s/^/=/\')',
+    command     => "${emerge_command} -1 --changed-use $(qlist -vIC | sed \'s/^/=/\')",
     refreshonly => true,
     timeout     => 43200,
     provider    => shell,

manifests/package.pp

@@ -273,7 +273,7 @@ define portage::package (
   }
 
   exec { "rebuild_${atom}":
-    command     => "emerge --changed-use -u1 ${atom}",
+    command     => "${portage::emerge_command} --changed-use -u1 ${atom}",
     refreshonly => true,
     timeout     => 43200,
     path        => ['/usr/local/sbin','/usr/local/bin',

manifests/params.pp

@@ -34,4 +34,5 @@ class portage::params {
   $portage_utils_keywords         = undef
   $portage_utils_keywords_version = undef
   $portage_utils_use              = undef
+  $emerge_command                 = '/usr/bin/emerge'
 }