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[python] Improve and document virtualenvwrapper initialization flow

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Changes:
* Simplify zstyle name `skip-virtualenvwrapper-init` to `initialize`
  avoiding double negation in name
* Always perform `eval (pyenv virtualenv-init -)` at initialization
* Prefer `virtualenvwrapper_lazy` over `virtualenvwrapper` when available
* Honor `VIRTUALENVWRAPPER_VIRTUALENV` if it is defined.
* Document about `VIRTUALENVWRAPPER_PYTHON` and `VIRTUALENVWRAPPER_VIRTUALENV`
  (this would be particularly important in macOS after recent homebrew update)
* Add additional documentation for `initialize` in _README.md_ and _zpreztorc_
* Add aliases `py2`, `py3` as shortcut for `python2`, `python3` respectively
This commit is contained in:
Indrajit Raychaudhuri
2017-07-24 19:34:11 -05:00
committed by Indrajit Raychaudhuri
parent 7e7124e84a
commit 19435b16ea
3 changed files with 51 additions and 17 deletions
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24
modules/python/README.md
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@ -56,6 +56,20 @@ is used. Replace *Developer* with your projects directory.
export PROJECT_HOME="$HOME/Developer"
```
The variable `VIRTUALENVWRAPPER_PYTHON` tells virtualenvwrapper to use the
specified full path of `python` interpreter overriding the `$PATH` search.
```sh
export VIRTUALENVWRAPPER_PYTHON=/usr/local/bin/python
```
The variable `VIRTUALENVWRAPPER_VIRTUALENV` tells virtualenvwrapper to use the
specified full path of `virtualenv` binary overriding the `$PATH` search.
```sh
export VIRTUALENVWRAPPER_VIRTUALENV=/usr/local/bin/virtualenv
```
The variable `$VIRTUALENVWRAPPER_VIRTUALENV_ARGS` tells virtualenvwrapper what
arguments to pass to `virtualenv`. For example, set the value to
*--system-site-packages* to ensure that all new environments have access to the
@ -76,10 +90,20 @@ This can be enabled with:
zstyle ':prezto:module:python:virtualenv' auto-switch 'yes'
```
virtualenvwrapper is automatically initialized if pre-requisites are met
(`$VIRTUALENVWRAPPER_VIRTUALENV` is explicitly set or `virtualenv` is in
`$PATH`). This can be disabled with:
```
zstyle ':prezto:module:python:virtualenv' initialize 'no'
```
Aliases
-------
- `py` is short for `python`.
- `py2` is short for `python2`.
- `py3` is short for `python3`.
Functions
---------