Django Static Precompiler

Django Static Precompiler provides template tags and filters to compile CoffeeScript, SASS / SCSS, LESS, Stylus, Babel and Handlebars. It works with both inline code and external files.

Installation

django-static-precompiler is avaiable through pip:

$ pip install django-static-precompiler
  1. Add “static_precompiler” to INSTALLED_APPS setting.

  2. Initialize DB:

    • On Django < 1.7 run syncdb or migrate static_precompiler if you use South (1.0 is required).
    • On Django >= 1.7 run migrate static_precompiler.
  3. Make sure that you have necessary compilers installed.

  4. Optionally, you can specify the full path to compilers (see below).

  5. In case you use Django’s staticfiles contrib app you have to add static-precompiler’s file finder to the STATICFILES_FINDERS setting, for example:

    STATICFILES_FINDERS = (
        'django.contrib.staticfiles.finders.FileSystemFinder',
        'django.contrib.staticfiles.finders.AppDirectoriesFinder',
        # other finders..
        'static_precompiler.finders.StaticPrecompilerFinder',
    )
    

Note that by default compiled files are saved into COMPILED folder under your STATIC_ROOT (or MEDIA_ROOT if you have no STATIC_ROOT in your settings). You can change this folder with STATIC_PRECOMPILER_ROOT and STATIC_PRECOMPILER_OUTPUT_DIR settings.

Note that all relative URLs in your stylesheets are converted to absolute URLs using your STATIC_URL setting.

compile template filter

compile is a template filter that allows to compile any source file supported by compilers configured with STATIC_PRECOMPILER_COMPILERS settings.

Example

{% load compile_static %}
{% load static %}

<script src="{% static "path/to/script.coffee"|compile %}"></script>
<link rel="stylesheet" href="{% static "path/to/styles1.less"|compile %}" />
<link rel="stylesheet" href="{% static "path/to/styles2.scss"|compile %}" />

renders to:

<script src="/static/COMPILED/path/to/script.js"></script>
<link rel="stylesheet" href="/static/COMPILED/path/to/styles1.css" />
<link rel="stylesheet" href="/static/COMPILED/path/to/styles2.css" />

{% inlinecompile %} tag

Compiles everything between {% inlinecompile %} and {% endinlinecompile %} with compiler specified by name. Compiler must be specified in STATIC_PRECOMPILER_COMPILERS setting. Names for default compilers are:

  • coffeescript
  • babel
  • less
  • sass
  • scss
  • stylus

Example

{% load compile_static %}

<script type="text/javascript">
  {% inlinecompile "coffeescript" %}
    console.log "Hello, World!"
  {% endinlinecompile %}
</script>

renders to:

<script type="text/javascript">
  (function() {
    console.log("Hello, World!");
  }).call(this);
</script>

General settings

STATIC_PRECOMPILER_COMPILERS

List of enabled compilers. You can modify it to enable your custom compilers. Default:

STATIC_PRECOMPILER_COMPILERS = (
    'static_precompiler.compilers.CoffeeScript',
    'static_precompiler.compilers.Babel',
    'static_precompiler.compilers.Handlebars',
    'static_precompiler.compilers.SASS',
    'static_precompiler.compilers.SCSS',
    'static_precompiler.compilers.LESS',
    'static_precompiler.compilers.Stylus',
)

You can specify compiler options using the following format:

STATIC_PRECOMPILER_COMPILERS = (
    ('static_precompiler.compilers.CoffeeScript', {"executable": "/usr/bin/coffeescript"}),
    ('static_precompiler.compilers.SCSS', {"compass_enabled": True}),
)
STATIC_PRECOMPILER_ROOT
Controls the absolute file path that compiled files will be written to. Default: STATIC_ROOT.
STATIC_PRECOMPILER_OUTPUT_DIR
Controls the directory inside STATIC_PRECOMPILER_ROOT that compiled files will be written to. Default: "COMPILED".
STATIC_PRECOMPILER_USE_CACHE
Whether to use cache for inline compilation. Default: True.
STATIC_PRECOMPILER_CACHE_TIMEOUT
Cache timeout for inline styles (in seconds). Default: 30 days.
STATIC_PRECOMPILER_MTIME_DELAY
Cache timeout for reading the modification time of source files (in seconds). Default: 10 seconds.
STATIC_PRECOMPILER_CACHE_NAME
Name of the cache to be used. If not specified then the default django cache is used. Default: None.
STATIC_PRECOMPILER_PREPEND_STATIC_URL
Add STATIC_URL to the output of template tags and filters. Default: False.
STATIC_PRECOMPILER_DISABLE_AUTO_COMPILE
Disable automatic compilation from template tags or compile_static utility function. Files are compiled only with compilestatic command (see below). Default: False.
STATIC_PRECOMPILER_FINDER_LIST_FILES
Whether or not static_precompiler.finders.StaticPrecompilerFinder will list compiled files when collectstatic command is executed. Set to True if you want compiled files to be found by collectstatic. Default: False.

Compiler specific settings

CoffeeScript

executable
Path to CoffeeScript compiler executable. Default: "coffee".
sourcemap_enabled
Boolean. Set to True to enable source maps. Default: False.

Example:

STATIC_PRECOMPILER_COMPILERS = (
    ('static_precompiler.compilers.CoffeeScript', {
        "executable": "/usr/bin/coffee",
        "sourcemap_enabled": True,
    }),
)

Babel

executable
Path to Babel compiler executable. Default: "babel".
sourcemap_enabled
Boolean. Set to True to enable source maps. Default: False.
plugins
Babel plugins command line option. Default: None (uses Babel’s default option).
presets
Babel presets command line option. Default: None (uses Babel’s default option).

Example:

STATIC_PRECOMPILER_COMPILERS = (
    ('static_precompiler.compilers.Babel', {
        "executable": "/usr/bin/babel",
        "sourcemap_enabled": True,
        "plugins": "transform-react-jsx",
        "presets": "es2015,react",
    }),
)

LiveScript

executable
Path to LiveScript compiler executable. Default: "lsc".
sourcemap_enabled
Boolean. Set to True to enable source maps. Default: False.

Example:

STATIC_PRECOMPILER_COMPILERS = (
    ('static_precompiler.compilers.LiveScript', {
        "executable": "/usr/bin/lsc",
        "sourcemap_enabled": True,
    }),
)

Handlebars

executable
Path to Handlebars compiler executable. Default: "handlebars".
sourcemap_enabled
Boolean. Set to True to enable source maps. Default: False.
known_helpers
List of known helpers (-k compiler option). Default: None.
namespace
Template namespace (-n compiler option). Default: None.
simple
Output template function only (-s compiler option). Default: False.

Example:

STATIC_PRECOMPILER_COMPILERS = (
    ('static_precompiler.compilers.Handlebars', {
        "executable": "/usr/bin/handlebars",
        "sourcemap_enabled": True,
        "simple": True,
    }),
)

SASS / SCSS

executable
Path to SASS compiler executable. Default: “sass”.
sourcemap_enabled
Boolean. Set to True to enable source maps. Default: False.
compass_enabled
Boolean. Whether to use compass or not. Compass must be installed in your system. Run sass --compass and if no error is shown it means that compass is installed.
load_paths
List of additional directories to look imported files (--load-path command line option). Default: None.
precision
How many digits of precision to use when outputting decimal numbers. Default: None. Set this to 8 or more if you compile Bootstrap.
output_style
Output style. Default: None. Can be nested, compact, compressed, or expanded.

Example:

STATIC_PRECOMPILER_COMPILERS = (
    ('static_precompiler.compilers.SCSS', {
        "executable": "/usr/bin/sass",
        "sourcemap_enabled": True,
        "compass_enabled": True,
        "load_paths": ["/path"],
        "precision": 8,
        "output_style": "compressed",
    }),
)

Libsass

Libsass is a C/C++ implementation of SASS. django-static-precompiler uses libsass-python bindings for libsass

To use SASS / SCSS compiler based on libsass install django-static-precompiler with libsass flavor:

pip install django-static-precompiler[libsass]

Note

Libsass compiler is disabled by default. See how to enable it in the example below.

Options:

sourcemap_enabled
Boolean. Set to True to enable source maps. Default: False.
load_paths
List of additional paths to find imports. Default: None.
precision
How many digits of precision to use when outputting decimal numbers. Default: None. Set this to 8 or more if you compile Bootstrap.
output_style
Output style. Default: None. Can be nested, compact, compressed, or expanded.

Example:

STATIC_PRECOMPILER_COMPILERS = (
    ('static_precompiler.compilers.libsass.SCSS', {
        "sourcemap_enabled": True,
        "load_paths": ["/path"],
        "precision": 8,
    }),
    ('static_precompiler.compilers.libsass.SASS', {
        "sourcemap_enabled": True,
        "load_paths": ["/path"],
        "precision": 8,
        "output_style": "compressed",
    }),
)

Note

Libsass compiler doesn’t support Compass extension, but you can replace it with compass-mixins.

LESS

executable
Path to LESS compiler executable. Default: "lessc".
sourcemap_enabled
Boolean. Set to True to enable source maps. Default: False.
include_path
List of additional directories to look for imported files (--include-path command line option). Default: None.
global_vars
Dictionary of global variables (--global-var command line option). Default: None.

Example:

STATIC_PRECOMPILER_COMPILERS = (
    ('static_precompiler.compilers.LESS', {
        "executable": "/usr/bin/lessc",
        "sourcemap_enabled": True,
        "global_vars": {"link-color": "red"},
    }),
)

Stylus

executable
Path to Stylus compiler executable. Default: "stylus".
sourcemap_enabled
Boolean. Set to True to enable source maps. Default: False.

Example:

STATIC_PRECOMPILER_COMPILERS = (
    ('static_precompiler.compilers.Stylus', {"executable": "/usr/bin/stylus", "sourcemap_enabled": True),
)

Usage with forms media

If you want to use static_precompiler in form media definitions, you can use the following approach:

from django import forms
from static_precompiler.utils import compile_static

class MyForm(forms.Form):

    @property
    def media(self):
        return forms.Media(
            css={"all": (
                compile_static("styles/myform.scss"),
            )},
            js=(
                compile_static("scripts/myform.coffee"),
            )
        )

compilestatic management command

Django Static Precompiler includes a management command compilestatic. It will scan your static files for source files and compile all of them.

You can use this command in conjunction with STATIC_PRECOMPILER_DISABLE_AUTO_COMPILE setting if you use custom STATICFILES_STORAGE such as S3 or some CDN. In that case you can should run compilestatic every time when your source files change and then run collectstatic.

You can run compilestatic in watch mode (--watch option). In watch mode it will monitor the changes in your source files and re-compile them on the fly. It can be handy if you use tools such as LiveReload.

You should install Watchdog to use watch mode or install django-static-precompiler with the watch extra:

$ pip install django-static-precompiler[watch]

Troubleshooting

If you get [Errno 2] No such file or directory make sure that you have the required compiler installed. For all compilers you can specify the path to executable file using the executable option, see examples above.

If you run migrate and get ImportError: cannot import name migrations then most likely you use Django < 1.7 and South < 1.0. You should either upgrade to Django 1.7+ or use South 1.0.