78 lines
2.6 KiB
Python
78 lines
2.6 KiB
Python
# Copyright (c) 2013 Mirantis Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import sys
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from bunch import Bunch
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from files_manager import FilesManager
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from script_runner import ScriptRunner
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class ExecutionPlanRunner(object):
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def __init__(self, execution_plan):
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self._execution_plan = execution_plan
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self._main_script = self._prepare_script(execution_plan.Body)
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self._script_funcs = {}
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self._files_manager = FilesManager(execution_plan)
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self._prepare_executors(execution_plan)
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def run(self):
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script_globals = {
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"args": Bunch(self._execution_plan.get('Parameters') or {})
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}
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script_globals.update(self._script_funcs)
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exec self._main_script in script_globals
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if '__execution_plan_exception' in script_globals:
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raise script_globals['__execution_plan_exception']
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return script_globals['__execution_plan_result']
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@staticmethod
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def _unindent(script, initial_indent):
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lines = script.expandtabs(4).split('\n')
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min_indent = sys.maxint
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for line in lines:
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indent = -1
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for i, c in enumerate(line):
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if c != ' ':
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indent = i
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break
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if 0 <= indent < min_indent:
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min_indent = indent
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return '\n'.join([' ' * initial_indent + line[min_indent:]
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for line in lines])
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def _prepare_executors(self, execution_plan):
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for key, value in execution_plan.Scripts.items():
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self._script_funcs[key] = ScriptRunner(
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key, Bunch(value), self._files_manager)
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@staticmethod
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def _prepare_script(body):
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script = 'def __execution_plan_main():\n'
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script += ExecutionPlanRunner._unindent(body, 4)
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script += """
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try:
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__execution_plan_result = __execution_plan_main()
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except Exception as e:
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__execution_plan_exception = e
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"""
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return script
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def __enter__(self):
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return self
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def __exit__(self, exc_type, exc_val, exc_tb):
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self._files_manager.clear()
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return False
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