1 files changed, 68 insertions, 0 deletions
diff --git a/baserockimport/package.py b/baserockimport/package.py
new file mode 100644
index 0000000..6095b30
--- /dev/null
+++ b/baserockimport/package.py
@@ -0,0 +1,68 @@
+# Copyright (C) 2014  Codethink Limited
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+
+class Package(object):
+    '''A package in the processing queue.
+
+    In order to provide helpful errors, this item keeps track of what
+    packages depend on it, and hence of why it was added to the queue.
+
+    '''
+    def __init__(self, kind, name, version):
+        self.kind = kind
+        self.name = name
+        self.version = version
+        self.required_by = []
+        self.morphology = None
+        self.dependencies = None
+        self.is_build_dep = False
+        self.version_in_use = version
+
+    def __cmp__(self, other):
+        return cmp(self.name, other.name)
+
+    def __repr__(self):
+        return '<Package %s-%s>' % (self.name, self.version)
+
+    def __str__(self):
+        if len(self.required_by) > 0:
+            required_msg = ', '.join(self.required_by)
+            required_msg = ', required by: ' + required_msg
+        else:
+            required_msg = ''
+        return '%s-%s%s' % (self.name, self.version, required_msg)
+
+    def add_required_by(self, item):
+        self.required_by.append('%s-%s' % (item.name, item.version))
+
+    def match(self, name, version):
+        return (self.name==name and self.version==version)
+
+    # FIXME: these accessors are useless, but I want there to be some way
+    # of making it clear that some of the state of the Package object is
+    # mutable and some of the state is not ...
+
+    def set_morphology(self, morphology):
+        self.morphology = morphology
+
+    def set_dependencies(self, dependencies):
+        self.dependencies = dependencies
+
+    def set_is_build_dep(self, is_build_dep):
+        self.is_build_dep = is_build_dep
+
+    def set_version_in_use(self, version_in_use):
+        self.version_in_use = version_in_use