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Mozilla Circus hook for modifying environment with an external command.

Project description

A simple Mozilla Circus hook for preparing process execution environment with external script or program.

Ever wanted to load environment variables from a shell script instead of putting them in the Circus configuration? Now you can.


$ pip install circus-env-modifier

Usage example


[watcher:myprocess] cmd = /usr/bin/mydaemon hooks.before_spawn = circus_env_modifier.before_spawn env_modification_command = . /opt/

[env:myprocess] APP_PATH=/opt/application




Copyright 2014 Mikołaj Siedlarek <>

Licensed 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

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.

Project details

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