virtstrap - Making repeatable environments easy!
A simple script that allows you to setup a repeatable project using a variety of tools. The project came out of a need to use some things from buildout and some things from pip and virtualenv. However, eventually buildout support was abandoned as pip and virtualenv were powerful enough for the job - they just needed better tools.
- Create repeatable projects between other developers and environments
- Provide a simple and easy to use interface
- Create Gemfile/Gemfile.lock like system
- Set custom environment variables in the virtualenv
- Setup multi python virtualenvs
- Create a plugin system similar that is both flexible and simple
- Allow for local caching of compiled python modules so new virtstrap environments don’t continually go online to find a module.
- A configuration file that is portable to more than just virtstrap. This allows for programs that aren’t virtstrap to take advantage of the the configuration file.
- Provides a standard location for virtualenv
- Provide a quick and simple way to activate the current environment
- Generate a requirements file much like a Gemfile.lock
- Provide a simple plugin system
- Allows for arbitrary environment variables to be set
Is this yet another build tool?
Yes and no. Virtstrap is meant as a layer above virtualenv+pip to give the user buildout like capabilities without all the buildout overhead (I hope).
Why not virtualenv-wrapper?
I looked into using it but it did not fit my particular needs. It’s a great tool but I originally wanted to create a tool that didn’t have to be installed system wide to see use. Now, however, I see that as a horrible oversight and an unnecessary limitation. Although I still feel there is something elegant about keeping the package out of the global system, it now seems unreasonable to me. As a consequence, this question seems even more relevant. However, after having built the initial versions of virtstrap, I realized that virtstrap could make virtualenv-wrapper even simpler. It could also be shared between developers, build systems, and any number of scenarios. So, here’s my crack at making something truly useful for python development.
virtstrap Quick Start
The easiest way to get started with virtstrap is to install it on your local machine by simply doing the following:
pip install virtstrap
Note: If you don’t want to install it into your system. Look below for an alternative installation.
To add virtstrap to your project. The most basic usage is:
cd path_to_your_project_path vstrap init
This will add a directory named .vs.env and a file called quickactivate to your directory.
As of 0.3.x configuration files won’t be required. Granted, virtstrap isn’t very useful without it, but, if you really want to start a virtstrapped environment without doing anything, it’s as simple as vstrap init.
To get more out of virtstrap you should define a VEfile. This stands for virtual environment file. This is a general purpose file to be used for defining your virtual environment.
The configuration file will be expected in the root directory of your project. Any other location can be specified, but that is extremely discouraged.
At the moment the file is a YAML file. Eventually I hope to move away from yaml as its syntax can get in the way of defining requirements and the general environment.
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