pip-install

A step to execute the pip command. Without any arguments this step will try to install the requirements defined in requirements.txt. The step will fail if the file does not exist.

If you want to install only a single package, you can just set the requirements_file parameter to an empty string and specify the packages via the packages_list parameter:

    - pip-install:
        requirements_file: ""
        packages_list: "mock"

By default the step will try to use wheel if the enviroment variable PIP_USE_WHEEL is set to true. Wheel support however may fail, since not all packages support wheel. However it can speed up future installs/builds significantly. The virtual-env step can easily enable wheel support on the wercker/python box.

Options

• requirements_file (optional, default=requirements.txt). The requirements.txt file to use. Set to empty if no requirements file is used.
• packages_list (optional, default=""). List of packages to install (usefull for installing packages outside of requirements.txt). The property can contain more than one package, specified as a single string seperated by spaces.
• pip_command (optional, default="pip"). Can be used to switch to python 3 specific pip on Ubuntu: pip-3.2.
• auto_run_wheel (optional, default=true). If the PIP_USE_WHEEL environment variable is set to true. The pip install step will also run pip wheel before running pip install. Settings auto_run_wheel to false will disable this behavior.
• cleanup_wheel_dir (optional, default=false). If the $PIP_WHEEL_DIR environment variable is set. Settings this property to true, will clenaup the wheel dir (before running). This may be needed after updates to the box, or when packages are updated without changing version numbers. If the wheel dir is specified through a pip.ini this option will fail, only $PIP_WHEEL_DIR is supported.
• extra_args (optional, default=""). This allows you to pass any argument to the pip install command.
• extra_wheel_args (optional, default=""). This allows you to pass any argument to the pip wheel command (if enabled). Since the default wercker python environment uses a recent version of pip and can use wheel to speed up subsequent installs, you may want to pass extra arguments such as: ALLOW_EXTERNAL and ALLOW_UNVERIFIED to allow installs of external and unverified packages/sources. See the documentation on pip wheel for more information.

Example

Basic usage:

    - pip-install

If your requirements file is not named requirements.txt, but dev-requirements.txt:

    - pip-install:
        requirements_file: "dev-requirements.txt"

Only install the mock and httpretty packages

    - pip-install:
        requirements_file: ""
        packages_list: "mock httpretty"

If you want to install a package besides the ones specified in the requirements.txt file:

    - pip-install:
        packages_list: "mock httpretty"

To disable the automatic execution of wheel, use:

    - pip-install:
        auto_run_wheel: false

To run pip install, but with a clean up of the $PIP_WHEEL_DIR:

    - pip-install:
        cleanup_wheel_dir: true

License

The MIT License (MIT)

Copyright (c) 2014 wercker

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Changelog

0.0.6

• added: extra_args parameter support
• added: extra_wheel_args parameter support
• fix: a bash error when trying to install via packages_list and requirements_file

0.0.5

• pip_command option added

0.0.4

• cleanup_wheel_dir support added
• requirements_file support added
• packages_list option added

0.0.3

• auto_run_wheel property added
• pip wheel behavior added (if $PIP_USE_WHEEL is set to true )

0.0.1

• initial release