Python 3.10 support: collections.abc (#20441)

lib/spack/external/jinja2/runtime.py

@@ -315,10 +315,14 @@ def __repr__(self):
 
 # register the context as mapping if possible
 try:
-    from collections import Mapping
+    from collections.abc import Mapping
     Mapping.register(Context)
 except ImportError:
-    pass
+    try:
+        from collections import Mapping
+        Mapping.register(Context)
+    except ImportError:
+        pass
 
 
 class BlockReference(object):

lib/spack/external/jinja2/sandbox.py

@@ -14,7 +14,7 @@
 """
 import types
 import operator
-from collections import Mapping
+import sys
 from jinja2.environment import Environment
 from jinja2.exceptions import SecurityError
 from jinja2._compat import string_types, PY2
@@ -23,6 +23,11 @@
 from markupsafe import EscapeFormatter
 from string import Formatter
 
+if sys.version_info >= (3, 3):
+    from collections.abc import Mapping
+else:
+    from collections import Mapping
+
 
 #: maximum number of items a range may produce
 MAX_RANGE = 100000
@@ -79,7 +84,10 @@
     pass
 
 #: register Python 2.6 abstract base classes
-from collections import MutableSet, MutableMapping, MutableSequence
+if sys.version_info >= (3, 3):
+    from collections.abc import MutableSet, MutableMapping, MutableSequence
+else:
+    from collections import MutableSet, MutableMapping, MutableSequence
 _mutable_set_types += (MutableSet,)
 _mutable_mapping_types += (MutableMapping,)
 _mutable_sequence_types += (MutableSequence,)

lib/spack/external/jinja2/tests.py

@@ -10,11 +10,16 @@
 """
 import operator
 import re
-from collections import Mapping
+import sys
 from jinja2.runtime import Undefined
 from jinja2._compat import text_type, string_types, integer_types
 import decimal
 
+if sys.version_info >= (3, 3):
+    from collections.abc import Mapping
+else:
+    from collections import Mapping
+
 number_re = re.compile(r'^-?\d+(\.\d+)?$')
 regex_type = type(number_re)
 

lib/spack/external/jinja2/utils.py

@@ -482,10 +482,14 @@ def __reversed__(self):
 
 # register the LRU cache as mutable mapping if possible
 try:
-    from collections import MutableMapping
+    from collections.abc import MutableMapping
     MutableMapping.register(LRUCache)
 except ImportError:
-    pass
+    try:
+        from collections import MutableMapping
+        MutableMapping.register(LRUCache)
+    except ImportError:
+        pass
 
 
 def select_autoescape(enabled_extensions=('html', 'htm', 'xml'),