Standardized fencing off of python virtual environments on a per-project basis
Standardized fencing off of python virtual environments on a per-project basis. The idea is to take a directory as an input and create and manage a python virtual environment in a known location.
Master on Linux
Master on Windows
How does it work?
fencepy is fairly simple. After parsing arguments, it calls out to the correct copy of virtualenv (based on the location of the running python interpreter) with a pre-generated base directory. Upon successful creation of the virtual environment, it applies various modifications based on the contents of the directory from which it was run.
The goal is to make this framework attractive to users of other compatible products. For instance, as a user of git and sublime text, I added functionality related to those.
If the directory provided as input (defaults to cwd) is part of a git repository, the virtual environment created will be relative to the root of that repository.
The sublime linter plugin is very easy to configure. Pointing it to a particular installation of python is as simple as putting some json into a configuration file. If there is a .sublime-project file in the input directory, then it will be configured to respect the virtual environment that is being created.
As a helpful shortcut, if there is a requirements.txt file in the input directory, then those requirements will be installed upon virtualenv creation.
If you use oh-my-zsh, when you set up your first fencepy environment, it will configure some shortcuts for you:
fpadd -> fencepy create fpnew -> fencepy create fpsrc -> . `fencepy activate` fpup -> fencepy update fpdel -> fencepy erase
fencepy create: Create a new virtual environment
. `fencepy activate`: Activate the virtual environment in a bash-like shell
source (fencepy activate): Activate the virtual environment in fish shell
. $(fencepy activate): Activate the virtual environment in windows powershell
fencepy update: Re-run all plugins on an existing fencepy
fencepy erase: Remove the virtual environment
fencepy nuke: Remove all of fencepy’s virtual environments (for the obsessive cleaners out there)
fencepy genconfig: Create a config file with defaults in fencepy’s root directory
fencepy help: Get help on these and other optional arguments
Both python 2 and 3 are supported. Additionally, both can be used for one project, as they will be stored in separate directories.
Both Windows and UNIX shells are supported! I have not yet figured out how to activate in one command from within CMD.exe. If anyone knows the solution, please let me know!
Additional functionality should be very easy to implement. Each of the hooks mentioned above is implemented as a “plugin” that takes the full dict of parsed arguments as input. Additionally, inverse cleanup methods are planned for the future.
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