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| 1 | +# Copyright 2017, David Wilson |
| 2 | +# |
| 3 | +# Redistribution and use in source and binary forms, with or without |
| 4 | +# modification, are permitted provided that the following conditions are met: |
| 5 | +# |
| 6 | +# 1. Redistributions of source code must retain the above copyright notice, |
| 7 | +# this list of conditions and the following disclaimer. |
| 8 | +# |
| 9 | +# 2. Redistributions in binary form must reproduce the above copyright notice, |
| 10 | +# this list of conditions and the following disclaimer in the documentation |
| 11 | +# and/or other materials provided with the distribution. |
| 12 | +# |
| 13 | +# 3. Neither the name of the copyright holder nor the names of its contributors |
| 14 | +# may be used to endorse or promote products derived from this software without |
| 15 | +# specific prior written permission. |
| 16 | +# |
| 17 | +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 18 | +# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 19 | +# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 20 | +# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| 21 | +# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 22 | +# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 23 | +# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 24 | +# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 25 | +# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 26 | +# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 27 | +# POSSIBILITY OF SUCH DAMAGE. |
| 28 | + |
| 29 | +from __future__ import absolute_import |
| 30 | +import os.path |
| 31 | +import sys |
| 32 | + |
| 33 | +# |
| 34 | +# This is not the real Strategy implementation module, it simply exists as a |
| 35 | +# proxy to the real module, which is loaded using Python's regular import |
| 36 | +# mechanism, to prevent Ansible's PluginLoader from making up a fake name that |
| 37 | +# results in ansible_mitogen plugin modules being loaded twice: once by |
| 38 | +# PluginLoader with a name like "ansible.plugins.strategy.mitogen", which is |
| 39 | +# stuffed into sys.modules even though attempting to import it will trigger an |
| 40 | +# ImportError, and once under its canonical name, "ansible_mitogen.strategy". |
| 41 | +# |
| 42 | +# Therefore we have a proxy module that imports it under the real name, and |
| 43 | +# sets up the duff PluginLoader-imported module to just contain objects from |
| 44 | +# the real module, so duplicate types don't exist in memory, and things like |
| 45 | +# debuggers and isinstance() work predictably. |
| 46 | +# |
| 47 | + |
| 48 | +BASE_DIR = os.path.abspath( |
| 49 | + os.path.join(os.path.dirname(__file__), '../../..') |
| 50 | +) |
| 51 | + |
| 52 | +if BASE_DIR not in sys.path: |
| 53 | + sys.path.insert(0, BASE_DIR) |
| 54 | + |
| 55 | +import ansible_mitogen.loaders |
| 56 | +import ansible_mitogen.strategy |
| 57 | + |
| 58 | + |
| 59 | +Base = ansible_mitogen.loaders.strategy_loader.get('host_pinned', class_only=True) |
| 60 | + |
| 61 | +if Base is None: |
| 62 | + raise ImportError( |
| 63 | + 'The host_pinned strategy is only available in Ansible 2.7 or newer.' |
| 64 | + ) |
| 65 | + |
| 66 | +class StrategyModule(ansible_mitogen.strategy.StrategyMixin, Base): |
| 67 | + pass |
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