Implement a new @live-ebuilds which is generated from installed packages

that inherit from know live eclasses such as cvs, darcs, git, mercurial,
and subversion. The list of eclasses is controlled by an "inherits"
attribute that is configure in sets.conf for and instance of InheritSet.
This set serves a purpose similar to the -scm ebuild suffix that has
been proposed in GLEP 54.

svn path=/main/trunk/; revision=11292

2 files changed, 44 insertions, 1 deletions

diff --git a/cnf/sets.conf b/cnf/sets.conf
index f422f5004..13c09a366 100644
--- a/cnf/sets.conf
+++ b/cnf/sets.conf
@@ -41,3 +41,9 @@ directory = /etc/portage/sets
 [preserved-rebuild]
 class = portage.sets.libs.PreservedLibraryConsumerSet
 world-candidate = False
+
+# Installed ebuilds that inherit from known live eclasses.
+[live-ebuilds]
+class = portage.sets.dbapi.InheritSet
+world-candidate = False
+inherits = "cvs darcs git mercurial subversion"
diff --git a/pym/portage/sets/dbapi.py b/pym/portage/sets/dbapi.py
index 5352a32f3..c31db5542 100644
--- a/pym/portage/sets/dbapi.py
+++ b/pym/portage/sets/dbapi.py
@@ -6,7 +6,7 @@ from portage.versions import catsplit
 from portage.sets.base import PackageSet
 from portage.sets import SetConfigError, get_boolean
 
-__all__ = ["CategorySet", "EverythingSet"]
+__all__ = ["CategorySet", "EverythingSet", "InheritSet"]
 
 class EverythingSet(PackageSet):
 	_operations = ["merge", "unmerge"]
@@ -32,6 +32,43 @@ class EverythingSet(PackageSet):
 		return EverythingSet(trees["vartree"].dbapi)
 	singleBuilder = classmethod(singleBuilder)
 
+class InheritSet(PackageSet):
+
+	_operations = ["merge", "unmerge"]
+
+	description = "Package set which contains all packages " + \
+		"that inherit one or more specific eclasses."
+
+	def __init__(self, vardb=None, inherits=None):
+		super(InheritSet, self).__init__()
+		self._db = vardb
+		self._inherits = inherits
+
+	def load(self):
+		atoms = []
+		inherits = self._inherits
+		cp_list = self._db.cp_list
+		aux_get = self._db.aux_get
+		aux_keys = ["INHERITED", "SLOT"]
+		for cp in self._db.cp_all():
+			for cpv in cp_list(cp):
+				inherited, slot = aux_get(cpv, aux_keys)
+				inherited = inherited.split()
+				if inherits.intersection(inherited):
+					atoms.append("%s:%s" % (cp, slot))
+
+		self._setAtoms(atoms)
+
+	def singleBuilder(cls, options, settings, trees):
+		if not "inherits" in options:
+			raise SetConfigError("no inherits given")
+
+		inherits = options["inherits"]
+		return cls(vardb=trees["vartree"].dbapi,
+			inherits=frozenset(inherits.split()))
+
+	singleBuilder = classmethod(singleBuilder)
+
 class CategorySet(PackageSet):
 	_operations = ["merge", "unmerge"]