Refactors Cabal to fit the new mediator pattern design

Cabal has now been split into a builder, cabal, a fetcher, hackage, and a port aka mediator, haskellport. It's been gutted to try to match some common api between the base classes. Also, bits of Darcs have been pulled out into packagesource.

1 files changed, 33 insertions, 0 deletions

diff --git a/modules/fetcher.py b/modules/fetcher.py
new file mode 100644
index 0000000..6f52fe8
--- /dev/null
+++ b/modules/fetcher.py
@@ -0,0 +1,33 @@
+# Fedora Developer Shell
+#
+# 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 Library 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+#
+# Authors: Yaakov M. Nemoy <ynemoy@redhat.com>
+#
+
+from base.module import Module
+
+class Fetcher(Module): pass
+    def latest_version(self, pkg):
+        '''download information from hackage to find out the latest version of a package
+        '''
+        raise NotImplementedError
+
+    def url(self, pkg, ver):
+        '''returns the url for tarball for a hackage package'''
+        raise NotImplementedError
+
+    def latest_url(self, pkg):
+        ver = self.latest_version(pkg)
+        return self.url(pkg, ver)