| """Executable Python script for running Python actions. |
| |
| /* |
| * 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. |
| */ |
| """ |
| |
| import os |
| import sys |
| import codecs |
| import traceback |
| sys.path.append('../actionProxy') |
| from actionproxy import ActionRunner, main, setRunner |
| |
| |
| class PythonRunner(ActionRunner): |
| |
| def __init__(self): |
| ActionRunner.__init__(self, '/action/__main__.py') |
| self.fn = None |
| self.mainFn = 'main' |
| self.global_context = {} |
| |
| def initCodeFromString(self, message): |
| # do nothing, defer to build step |
| return True |
| |
| def build(self, message): |
| binary = message['binary'] if 'binary' in message else False |
| if not binary: |
| code = message['code'] |
| filename = 'action' |
| elif os.path.isfile(self.source): |
| with codecs.open(self.source, 'r', 'utf-8') as m: |
| code = m.read() |
| workdir = os.path.dirname(self.source) |
| sys.path.insert(0, workdir) |
| os.chdir(workdir) |
| else: |
| sys.stderr.write('Zip file does not include ' + os.path.basename(self.source) + '\n') |
| return False |
| |
| try: |
| filename = os.path.basename(self.source) |
| self.fn = compile(code, filename=filename, mode='exec') |
| if 'main' in message: |
| self.mainFn = message['main'] |
| |
| # if the directory 'virtualenv' is extracted out of a zip file |
| path_to_virtualenv = os.path.dirname(self.source) + '/virtualenv' |
| if os.path.isdir(path_to_virtualenv): |
| # activate the virtualenv using activate_this.py contained in the virtualenv |
| activate_this_file = path_to_virtualenv + '/bin/activate_this.py' |
| if os.path.exists(activate_this_file): |
| with open(activate_this_file) as f: |
| code = compile(f.read(), activate_this_file, 'exec') |
| exec(code, dict(__file__=activate_this_file)) |
| else: |
| sys.stderr.write('Invalid virtualenv. Zip file does not include /virtualenv/bin/' + os.path.basename(activate_this_file) + '\n') |
| return False |
| exec(self.fn, self.global_context) |
| return True |
| except Exception: |
| traceback.print_exc(file=sys.stderr, limit=0) |
| return False |
| |
| def verify(self): |
| return self.fn is not None |
| |
| def run(self, args, env): |
| result = None |
| try: |
| os.environ = env |
| self.global_context['param'] = args |
| exec('fun = %s(param)' % self.mainFn, self.global_context) |
| result = self.global_context['fun'] |
| except Exception: |
| traceback.print_exc(file=sys.stderr) |
| |
| if result and isinstance(result, dict): |
| return (200, result) |
| else: |
| return (502, {'error': 'The action did not return a dictionary.'}) |
| |
| if __name__ == '__main__': |
| setRunner(PythonRunner()) |
| main() |