Expand the Suite interface and create a TargetSuite sub-class

Signed-off-by: Niels Thykier <niels@thykier.net>

britney.py

@@ -193,7 +193,7 @@ from urllib.parse import quote
 import apt_pkg
 
 # Check the "check_field_name" reflection before removing an import here.
-from britney2 import Suites, Suite, SuiteClass, SourcePackage, BinaryPackageId, BinaryPackage
+from britney2 import Suites, Suite, SuiteClass, TargetSuite, SourcePackage, BinaryPackageId, BinaryPackage
 from britney2.consts import (SOURCE, SOURCEVER, ARCHITECTURE, CONFLICTS, DEPENDS, PROVIDES, MULTIARCH)
 from britney2.excuse import Excuse
 from britney2.hints import HintParser
@@ -354,6 +354,8 @@ class Britney(object):
 
         self.logger.info("Compiling Installability tester")
         self.pkg_universe, self._inst_tester = build_installability_tester(self.suite_info, self.options.architectures)
+        target_suite = self.suite_info.target_suite
+        target_suite.inst_tester = self._inst_tester
 
         if not self.options.nuninst_cache:
             self.logger.info("Building the list of non-installable packages for the full archive")
@@ -497,6 +499,8 @@ class Britney(object):
                 if suite != 'testing':
                     suite_class = SuiteClass.ADDITIONAL_SOURCE_SUITE if suffix else SuiteClass.PRIMARY_SOURCE_SUITE
                     suites.append(Suite(suite_class, suite, suite_path, suite_short_name=suffix))
+                else:
+                    suites.append(TargetSuite(suite_class, suite, suite_path, suite_short_name=suffix))
             else:
                 if suite in {'testing', 'unstable'}:  # pragma: no cover
                     self.logger.error("Mandatory configuration %s is not set in the config", suite.upper())

britney2/__init__.py

@@ -34,13 +34,74 @@ class Suite(object):
         self.path = path
         self.suite_short_name = suite_short_name if suite_short_name else ''
         self.sources = {}
-        self.binaries = {}
+        self._binaries = {}
         self.provides_table = {}
+        self._all_binaries_in_suite = None
 
     @property
     def excuses_suffix(self):
         return self.suite_short_name
 
+    @property
+    def binaries(self):
+        return self._binaries
+
+    @binaries.setter
+    def binaries(self, binaries):
+        self._binaries = binaries
+        self._all_binaries_in_suite = {x.pkg_id: x for a in binaries for x in binaries[a].values()}
+
+    def any_of_these_are_in_the_suite(self, pkgs):
+        """Test if at least one package of a given set is in the suite
+
+        :param pkgs: A set of BinaryPackageId
+        :return: True if any of the packages in pkgs are currently in the suite
+        """
+        return not self._all_binaries_in_suite.isdisjoint(pkgs)
+
+    def is_pkg_in_the_suite(self, pkg_id):
+        """Test if the package of is in testing
+
+        :param pkg_id: A BinaryPackageId
+        :return: True if the pkg is currently in the suite
+        """
+        return pkg_id in self._all_binaries_in_suite
+
+
+class TargetSuite(Suite):
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.inst_tester = None
+
+    # FIXME: Make this independent of the inst_tester once _all_binaries_in_suite
+    # is kept in sync
+    def any_of_these_are_in_the_suite(self, pkg_ids):
+        """Test if at least one package of a given set is in the suite
+
+        :param pkg_ids: A set of BinaryPackageId
+        :return: True if any of the packages in pkgs are currently in the suite
+        """
+        return self.inst_tester.any_of_these_are_in_testing(pkg_ids)
+
+    # FIXME: Make this independent of the inst_tester once _all_binaries_in_suite
+    # is kept in sync
+    def is_pkg_in_the_suite(self, pkg_id):
+        """Test if the package of is in testing
+
+        :param pkg_id: A BinaryPackageId
+        :return: True if the pkg is currently in the suite
+        """
+        return self.inst_tester.is_pkg_in_testing(pkg_id)
+
+    def is_installable(self, pkg_id):
+        """Determine whether the given package can be installed in the suite
+
+        :param pkg_id: A BinaryPackageId
+        :return: True if the pkg is currently installable in the suite
+        """
+        return self.inst_tester.is_installable(pkg_id)
+
 
 class Suites(object):