1 files changed, 57 insertions, 0 deletions
diff --git a/third_party/python/pip_tools/piptools/repositories/base.py b/third_party/python/pip_tools/piptools/repositories/base.py
new file mode 100644
index 0000000000..54849cb7f8
--- /dev/null
+++ b/third_party/python/pip_tools/piptools/repositories/base.py
@@ -0,0 +1,57 @@
+# coding: utf-8
+from __future__ import absolute_import, division, print_function, unicode_literals
+
+from abc import ABCMeta, abstractmethod
+from contextlib import contextmanager
+
+from pip._vendor.six import add_metaclass
+
+
+@add_metaclass(ABCMeta)
+class BaseRepository(object):
+    def clear_caches(self):
+        """Should clear any caches used by the implementation."""
+
+    @abstractmethod
+    @contextmanager
+    def freshen_build_caches(self):
+        """Should start with fresh build/source caches."""
+
+    @abstractmethod
+    def find_best_match(self, ireq):
+        """
+        Return a Version object that indicates the best match for the given
+        InstallRequirement according to the repository.
+        """
+
+    @abstractmethod
+    def get_dependencies(self, ireq):
+        """
+        Given a pinned, URL, or editable InstallRequirement, returns a set of
+        dependencies (also InstallRequirements, but not necessarily pinned).
+        They indicate the secondary dependencies for the given requirement.
+        """
+
+    @abstractmethod
+    def get_hashes(self, ireq):
+        """
+        Given a pinned InstallRequire, returns a set of hashes that represent
+        all of the files for a given requirement. It is not acceptable for an
+        editable or unpinned requirement to be passed to this function.
+        """
+
+    @abstractmethod
+    @contextmanager
+    def allow_all_wheels(self):
+        """
+        Monkey patches pip.Wheel to allow wheels from all platforms and Python versions.
+        """
+
+    @abstractmethod
+    def copy_ireq_dependencies(self, source, dest):
+        """
+        Notifies the repository that `dest` is a copy of `source`, and so it
+        has the same dependencies. Otherwise, once we prepare an ireq to assign
+        it its name, we would lose track of those dependencies on combining
+        that ireq with others.
+        """