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+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+Execution plugin constants.
+"""
+import os
+import tempfile
+
+from . import exceptions
+
+# related to local
+PYTHON_SCRIPT_FILE_EXTENSION = '.py'
+POWERSHELL_SCRIPT_FILE_EXTENSION = '.ps1'
+DEFAULT_POWERSHELL_EXECUTABLE = 'powershell'
+
+# related to both local and ssh
+ILLEGAL_CTX_OPERATION_MESSAGE = 'ctx may only abort or retry once'
+
+# related to ssh
+DEFAULT_BASE_DIR = os.path.join(tempfile.gettempdir(), 'aria-ctx')
+FABRIC_ENV_DEFAULTS = {
+ 'connection_attempts': 5,
+ 'timeout': 10,
+ 'forward_agent': False,
+ 'abort_on_prompts': True,
+ 'keepalive': 0,
+ 'linewise': False,
+ 'pool_size': 0,
+ 'skip_bad_hosts': False,
+ 'status': False,
+ 'disable_known_hosts': True,
+ 'combine_stderr': True,
+ 'abort_exception': exceptions.TaskException,
+}
+VALID_FABRIC_GROUPS = set([
+ 'status',
+ 'aborts',
+ 'warnings',
+ 'running',
+ 'stdout',
+ 'stderr',
+ 'user',
+ 'everything'
+])