pyScss, a Scss compiler for Python
Project description
pyScss, a Scss compiler for Python
- Author:
German M. Bravo (Kronuz) <german.mb@gmail.com>
About
pyScss compiles Scss (Sass), a superset of CSS that is more powerful, elegant and easier to maintain than plain-vanilla CSS. The library acts as a CSS source code preprocesor which allows you to use variables, nested rules, mixins, and have inheritance of rules, all with a CSS-compatible syntax which the preprocessor then compiles to standard CSS.
Scss, as an extension of CSS, helps keep large stylesheets well-organized. It borrows concepts and functionality from projects such as OOCSS and other similar frameworks like as Sass. It’s build on top of the original PHP xCSS codebase structure but it’s been completely rewritten, many bugs have been fixed and it has been extensively extended to support almost the full range of Sass’ Scss syntax and functionality.
Support
pyScss is fully compatible with SCSS (Sass) 3.2 …it has:
Compass: Compass 0.11 Support
Nested rules
Keyword arguments
Mixins: @mixin, @include
Functions: @function, @return
Inheritance: @extend
Conditions: @if, @else if, @else
Loops: @for, @each
Variables: $, @variables, @vars
Sprites: sprite-map(), sprite(), sprite-position(), sprite-url(), …
Images: image-url(), image-width(), image-height(), …
Embedded (inline) images: inline-image()
Colors handling: adjust-color(), scale-color(), opacify()/transparentize(), lighten()/darken(), mix(), …
Math functions: sin(), cos(), tan(), round(), ceil(), floor(), pi(), …
CSS Compression: @option compress:yes;
Requirements
python >= 2.5
Installation
pyScss should be installed using pip or setuptools:
pip install pyScss easy_install pyScss
Usage
Usage example:
from scss import Scss css = Scss() css.compile("a { color: red + green; }")
Or compile from the command line:
python scss.py < file.scss
Interactive mode:
python scss.py --interactive
Examples
- Nested Rules
Example:
@option compress: no; .selector { a { display: block; } strong { color: blue; } }
…produces:
.selector a { display: block; } .selector strong { color: #00f; }
- Variables
Example:
@option compress: no; $main-color: #ce4dd6; $style: solid; $side: bottom; #navbar { border-#{$side}: { color: $main-color; style: $style; } }
…produces:
#navbar { border-bottom-color: #ce4dd6; border-bottom-style: solid; }
- Mixins
Example:
@option compress: no; @mixin rounded($side, $radius: 10px) { border-#{$side}-radius: $radius; -moz-border-radius-#{$side}: $radius; -webkit-border-#{$side}-radius: $radius; } #navbar li { @include rounded(top); } #footer { @include rounded(top, 5px); } #sidebar { @include rounded(left, 8px); }
…produces:
#navbar li { border-top-radius: 10px; -moz-border-radius-top: 10px; -webkit-border-top-radius: 10px; } #footer { border-top-radius: 5px; -moz-border-radius-top: 5px; -webkit-border-top-radius: 5px; } #sidebar { border-left-radius: 8px; -moz-border-radius-left: 8px; -webkit-border-left-radius: 8px; }
- Extend (using @extend)
Example:
@option compress: no; .error { border: 1px #f00; background-color: #fdd; } .error.intrusion { background-image: url("/image/hacked.png"); } .seriousError { @extend .error; border-width: 3px; }
…produces:
.error, .seriousError { border: 1px red; background-color: #fdd; } .error.intrusion, .seriousError.intrusion { background-image: url("/image/hacked.png"); } .seriousError { border-width: 3px; }
- Sprites (using sprite-map())
Example:
@option compress: no; $icons: sprite-map("sociable/*.png"); // contains sociable/facebook.png among others. div { background: $icons; } @each $icon in sprites($icons) { div .#{$icon} { width: image-width(sprite-file($icons, $icon)); height: image-height(sprite-file($icons, $icon)); background-position: sprite-position($icons, $icon); } }
…generates a new sprite file and produces something like:
div { background: url("/static/assets/u8Y7yEQL0UffAVw5rX7yhw.png?_=1298240989") 0px 0px no-repeat; } div .facebook { width: 32px; height: 32px; background-position: 0px 0px; } div .twitter { width: 32px; height: 32px; background-position: 0px -32px; } ...
- Interactive mode
Example:
$ python scss.py --interactive >>> @import "compass/css3" >>> show() ['functions', 'mixins', 'options', 'vars'] >>> show(mixins) ['apply-origin', 'apply-transform', ... 'transparent'] >>> show(mixins, transparent) @mixin transparent() { @include opacity(0); } >>> 1px + 5px 6px >>> _
Sass Sassy CSS
pyScss is a Scss (Sass) implementation for Python. Currently it implements @mixin, @include, @if, @else, @for, and @import… it also implements many of the Sass functions including color functions like hsla(), hsl(), darken(), lighten(), mix(), opacify(), transparentize(), saturate(), desaturate(), etc.) as well as sprite-map(), sprite-file(), image-width(), image-height() and the others.
In the file scss.py, by the top, you can configure the LOAD_PATHS to point to your Sass frameworks path (I have sass/frameworks/compass/*.scss and sass/framework/blueprint/*.scss files in my project directory: /usr/local/www/project/, where scss.py lives, so it defaults to use the sass/framework/ path, relative to the scss.py file) or configure using the command line –load-path option, see python scss.py –help.
I have succesfully compiled some Compass using python scss.py < myfile.css the following myfile.css:
@option compress: no; $blueprint-grid-columns : 24; $blueprint-grid-width : 30px; $blueprint-grid-margin : 10px; $font-color : #333; @import "compass/reset"; @import "compass/utilities"; @import "blueprint"; // Stuff goes here...
Bug tracker
If you have any suggestions, bug reports or annoyances please report them to the issue tracker at http://github.com/Kronuz/pyScss/issues
Contributing
Development of pyScss happens at github: https://github.com/Kronuz/pyScss
License
MIT License. See LICENSE for details. http://www.opensource.org/licenses/mit-license.php
Copyright
Copyright (c) 2011 German M. Bravo (Kronuz) Bits of code in pyScss come from various projects:
- Compass:
(c) 2009 Christopher M. Eppstein http://compass-style.org/
- Sass:
(c) 2006-2009 Hampton Catlin and Nathan Weizenbaum http://sass-lang.com/
- xCSS:
(c) 2010 Anton Pawlik http://xcss.antpaw.org/docs/
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