civet 0.9.2

Civet
=====


(Picture credit: [Leendertz](http://en.wikipedia.org/wiki/Kopi_Luwak#mediaviewer/File:Luwak-Katze_in_Kepahiang.jpg))

Civet precompiles Sass and CoffeeScript files in your Django project when
you use the `runserver` command. It will also watch the file changes for you.
Therefore, you can edit your Sass and CoffeeScript files and expect
`runserver` to recompile those files upon save, just like it restarts the
app server when you make changes to your Python source code


Usage
-----

In your `settings.py`, add Civet to your `INSTALLED_APPS` right after
`django.contrib.staticfiles`:

INSTALLED_APPS = (
# ...
'django.contrib.staticfiles',
'civet',
# ...
)

Then add a `CIVET_PRECOMPILED_ASSET_DIR` setting that tells Civet where to
put the precompiled assets. For example:

CIVET_PRECOMPILED_ASSET_DIR = os.path.join(BASE_DIR, 'precompiled_assets')

That's it. Once set up, each time you use `manage.py runserver`, Civet will
first check to see if there are new Sass and CoffeeScript files that need
precompiling. It will also start watch for file changes.


Sass and CoffeeScript Versions Supported
----------------------------------------

Civet is known to work with the following versions of Sass and CoffeeScript

* Sass 3.2.5 and above with Compass 0.12.2
* CoffeeScript 1.6.3


"We Only Use Sass (or CoffeeScript)"
------------------------------------

If your project doesn't use Sass and therefore doesn't contain any Sass files,
Civet won't invoke the Sass compiler and therefore it's ok if you don't have
Sass installed. The same rule applies to CoffeeScript files.


Customizable Options
--------------------

If you want to use additional CoffeeScript or Sass compiling options, add
these to your `settings.py`. Here we show the default values Civet uses:

CIVET_COFFEE_SCRIPT_ARGUMENTS = ('--compile', '--map')
CIVET_SASS_ARGUMENTS = ('--compass',)


Recompile Everything
--------------------

To recompile everything, just quit the server, delete the entire
`CIVET_PRECOMPILED_ASSET_DIR` directory, and use the `runserver` command
again.


Motivation
----------

We have developed Civet to solve the following problems:

1. It is too cumbersome to ask all our developers to remember using
`coffee -w` and `sass -w` every time they use `runserver`.

2. We want our CoffeeScript and Sass assets to be precompiled. It makes no
sense to compile them on the fly as we serve static assets. Plus, Sass
files that have a lot of includes can take a long time to compile
At one point we had a Sass file that took 6 seconds to compile. We don't
want our developers to want for 6 seconds every time they reload a page.

3. Django's static file layout requires Sass and CoffeeScript to watch
for separate directories. We simply can't have them watch the top-level
directory and call it a day. It is very cumbersome, however, to have
Sass compiler watch multiple directories, and the option for
multi-directory watch simply doesn't exist in the CoffeeScript compiler.

4. We have a lot of CoffeeScript files, and on OS X that number exceeds the
default maximum number of files that node.js (on which the official
CoffeeScript compiler is based on) can watch. (See
[this issue](https://github.com/joyent/node/issues/2479) for details.)


About the Name
--------------

Civet is "a slender nocturnal carnivorous mammal" (according to *New Oxford
American Dictionary*) that also produces
[kopi luwak](http://en.wikipedia.org/wiki/Kopi_Luwak) by ingesting coffee
beans. I was looking for a cheeky (sassy) project name that has to do with
coffee, and this comes to mind. Disclaimer: I have no idea what kopi luwak
tastes like, and no animal is harmed during the development of this plug-in.