Started moving things.

pakit/__init__.py

@@ -27,7 +27,8 @@
 from __future__ import absolute_import
 
 from pakit.recipe import Recipe
-from pakshell.shell import Archive, Dummy, Git, Hg
+from pakshell.shell import Dummy, Git, Hg
+from pakshell.arc import Archive
 
 __all__ = ['Archive', 'Dummy', 'Git', 'Hg', 'Recipe']
 

pakit/ifaces.py

@@ -0,0 +1,66 @@
+"""
+Shared holder of interfaces for the project.
+"""
+from __future__ import absolute_import
+from abc import ABCMeta, abstractmethod, abstractproperty
+
+from pakshell.cmd import Command
+
+
+class Fetchable(object):
+    """
+    Establishes an abstract interface for fetching source code.
+
+    Subclasses are destined for Recipe.repos to be used to retrieve source
+    from the wild.
+
+    Attributes:
+        target: The folder the source code should end up in.
+        uri: The location of the source code.
+    """
+    __metaclass__ = ABCMeta
+
+    def __init__(self, uri, target):
+        self.target = target
+        self.uri = uri
+
+    @abstractmethod
+    def __enter__(self):
+        """
+        Guarantees that source is available at target
+        """
+        raise NotImplementedError
+
+    @abstractmethod
+    def __exit__(self, exc_type, exc_value, exc_tb):
+        """
+        Handles errors as needed
+        """
+        raise NotImplementedError
+
+    @abstractproperty
+    def ready(self):
+        """
+        True iff the source code is available at target
+        """
+        raise NotImplementedError
+
+    @abstractproperty
+    def src_hash(self):
+        """
+        A hash that identifies the source snapshot
+        """
+        raise NotImplementedError
+
+    def clean(self):
+        """
+        Purges the source tree from the system
+        """
+        Command('rm -rf ' + self.target)
+
+    @abstractmethod
+    def download(self):
+        """
+        Retrieves code from the remote, may require additional steps
+        """
+        raise NotImplementedError

pakit/recipe.py

@@ -16,7 +16,8 @@
 
 from pakit.conf import RecipeURIDB
 from pakit.exc import PakitDBError, PakitError
-from pakshell.shell import Command, vcs_factory
+from pakshell.cmd import Command
+from pakshell.shell import vcs_factory
 
 
 PLOG = logging.getLogger('pakit').info

pakit/task.py

@@ -1,4 +1,4 @@
-# pylint: disable=not-an-iterable
+# pylint: disable=not-an-iterable,unsubscriptable-object
 """
 The Tasks that pakit can perform for the user.
 
@@ -17,9 +17,10 @@
 import pakit.recipe
 from pakit.exc import PakitCmdError, PakitLinkError
 from pakshell.shell import (
-    Command, walk_and_link, walk_and_unlink, walk_and_unlink_all,
+    walk_and_link, walk_and_unlink, walk_and_unlink_all,
     write_config, unlink_man_pages, user_input, cd_and_call
 )
+from pakshell.cmd import Command
 
 PREFIX = '\n  '
 PLOG = logging.getLogger('pakit').info