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diff --git a/setupbzr.py b/setupbzr.py
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+# setuptools plugin for bzr
+# Barry Warsaw <barry@python.org>
+
+# Use by adding this to your setuptools.file_finders entry point:
+# 'bzr = bzrplug:find_files_for_bzr'
+
+# http://peak.telecommunity.com/DevCenter/setuptools#adding-support-for-other-revision-control-systems
+
+import os
+import bzrlib.branch
+
+
+def get_children(path):
+    # Open an existing branch which contains the url.
+    branch, inpath = bzrlib.branch.Branch.open_containing(path)
+    # Get the inventory of the branch's last revision.
+    inv = branch.repository.get_revision_inventory(branch.last_revision())
+    # Get the inventory entry for the path.
+    entry = inv[inv.path2id(path)]
+    # Return the names of the children.
+    return [os.path.join(path, child) for child in entry.children.keys()]
+
+
+def find_files_for_bzr(dirname):
+    bzrfiles = []
+    search = [dirname]
+    while search:
+        current = search.pop(0)
+        children = get_children(current)
+        bzrfiles.extend(children)
+        search.extend([child for child in children if os.path.isdir(child)])
+    return bzrfiles