1 files changed, 45 insertions, 0 deletions
diff --git a/pym/portage/_sets/shell.py b/pym/portage/_sets/shell.py
new file mode 100644
index 000000000..658353ef2
--- /dev/null
+++ b/pym/portage/_sets/shell.py
@@ -0,0 +1,45 @@
+# Copyright 2007 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+import subprocess
+
+from portage import os
+from portage import _unicode_decode
+from portage.sets.base import PackageSet
+from portage.sets import SetConfigError
+
+__all__ = ["CommandOutputSet"]
+
+class CommandOutputSet(PackageSet):
+	"""This class creates a PackageSet from the output of a shell command.
+	   The shell command should produce one atom per line, that is:
+
+	   >>> atom1
+	       atom2
+	       ...
+	       atomN
+
+	   Args:
+	     name: A string that identifies the set.
+	     command: A string or sequence identifying the command to run
+	     (see the subprocess.Popen documentaion for the format)
+	"""
+	_operations = ["merge", "unmerge"]
+
+	def __init__(self, command):
+		super(CommandOutputSet, self).__init__()
+		self._command = command
+		self.description = "Package set generated from output of '%s'" % self._command
+	
+	def load(self):
+		pipe = subprocess.Popen(self._command, stdout=subprocess.PIPE, shell=True)
+		stdout, stderr = pipe.communicate()
+		if pipe.wait() == os.EX_OK:
+			self._setAtoms(_unicode_decode(stdout).splitlines())
+
+	def singleBuilder(self, options, settings, trees):
+		if not "command" in options:
+			raise SetConfigError("no command specified")
+		return CommandOutputSet(options["command"])
+	singleBuilder = classmethod(singleBuilder)