externals: move spack.util.ordereddict to external/ordereddict_backport

lib/spack/external/_pytest/fixtures.py

@@ -21,10 +21,7 @@
 from _pytest.outcomes import fail, TEST_OUTCOME
 
 
-if sys.version_info[:2] == (2, 6):
-    from ordereddict import OrderedDict
-else:
-    from collections import OrderedDict  # nopyqver
+from ordereddict_backport import OrderedDict
 
 
 def pytest_sessionstart(session):

lib/spack/spack/config.py

@@ -57,6 +57,7 @@
 from contextlib import contextmanager
 from six import string_types
 from six import iteritems
+from ordereddict_backport import OrderedDict
 
 import yaml
 from yaml.error import MarkedYAMLError
@@ -69,7 +70,6 @@
 import spack.architecture
 import spack.schema
 from spack.error import SpackError
-from spack.util.ordereddict import OrderedDict
 
 # Hacked yaml for configuration files preserves line numbers.
 import spack.util.spack_yaml as syaml

lib/spack/spack/test/conftest.py

@@ -28,6 +28,7 @@
 import shutil
 import re
 
+import ordereddict_backport
 import py
 import pytest
 
@@ -42,7 +43,6 @@
 import spack.platforms.test
 import spack.repo
 import spack.stage
-import spack.util.ordereddict
 import spack.util.executable
 import spack.util.pattern
 from spack.dependency import Dependency
@@ -603,7 +603,7 @@ def __init__(self, name, dependencies, dependency_types, conditions=None,
                  versions=None):
         self.name = name
         self.spec = None
-        self.dependencies = spack.util.ordereddict.OrderedDict()
+        self.dependencies = ordereddict_backport.OrderedDict()
 
         assert len(dependencies) == len(dependency_types)
         for dep, dtype in zip(dependencies, dependency_types):

lib/spack/spack/util/spack_yaml.py

@@ -31,6 +31,7 @@
   default unorderd dict.
 
 """
+from ordereddict_backport import OrderedDict
 from six import string_types, StringIO
 
 import yaml
@@ -41,7 +42,6 @@
 from llnl.util.tty.color import colorize, clen, cextra
 
 import spack.error
-from spack.util.ordereddict import OrderedDict
 
 # Only export load and dump
 __all__ = ['load', 'dump', 'SpackYAMLError']