virtualenv: add README (#7273)

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Sagar Patil 2018-10-13 01:24:26 +05:30 committed by Marc Cornellà
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# virtualenv
The plugin displays information of the created virtual container and allows background theming.
To use it, add `virtualenv` to the plugins array of your zshrc file:
```
plugins=(... virtualenv)
```
The plugin creates a `virtualenv_prompt_info` function that you can use in your theme, which displays
the basename of the current `$VIRTUAL_ENV`. It uses two variables to control how that is shown:
- `ZSH_THEME_VIRTUALENV_PREFIX`: sets the prefix of the VIRTUAL_ENV. Defaults to `[`.
- `ZSH_THEME_VIRTUALENV_SUFFIX`: sets the suffix of the VIRTUAL_ENV. Defaults to `]`.