LESSCPY

Python LESS Compiler.

A compiler written in Python for the LESS language. For those of us not willing or able to have node.js installed in our environment. Not all features of LESS are supported (yet). Some features wil probably never be supported (JavaScript evaluation). This program uses PLY (Python Lex-Yacc) to tokenize / parse the input and is considerably slower than the NodeJS compiler. The plan is to utilize this to build in proper syntax checking and perhaps YUI compressing.

This is an early version, so you are likly to find bugs.

For more information on LESS:

http://lesscss.org/ or https://github.com/cloudhead/less.js

Development files:

https://github.com/robotis/Lesscpy

Requirements

• Python 2.6 or 2.7
• ply (Python Lex-Yacc)

For more information on ply:

http://www.dabeaz.com/ply/

Installation

python setup.py install

Or simply place the package into your Python path.

Compiler script Usage

usage: lesscpy [-h] [-v] [-I INCLUDE] [-V] [-x] [-X] [-t] [-s SPACES] [-o OUT]
               [-r] [-f] [-m] [-D] [-g] [-S] [-L] [-N]
               target

LessCss Compiler

positional arguments:
  target                less file or directory

optional arguments:
  -h, --help            show this help message and exit
  -v, --version         show program's version number and exit
  -I INCLUDE, --include INCLUDE
                        Included less-files (comma separated)
  -V, --verbose         Verbose mode

Formatting options:
  -x, --minify          Minify output
  -X, --xminify         Minify output, no end of block newlines
  -t, --tabs            Use tabs
  -s SPACES, --spaces SPACES
                        Number of startline spaces (default 2)

Directory options:
  Compiles all \*.less files in directory that have a newer timestamp than
  it's css file.

  -o OUT, --out OUT     Output directory
  -r, --recurse         Recursive into subdirectorys
  -f, --force           Force recompile on all files
  -m, --min-ending      Add '.min' into output filename. eg, name.min.css
  -D, --dry-run         Dry run, do not write files

Debugging:
  -g, --debug           Debugging information
  -S, --scopemap        Scopemap
  -L, --lex-only        Run lexer on target
  -N, --no-css          No css output

Supported features

• Variables
• String interpolation
• Mixins
• mixins (Nested)
• mixins (Nested (Calls))
• mixins (closures)
• mixins (recursive)
• Guard expressions
• Parametered mixins (class)
• Parametered mixins (id)
• @arguments
• Nesting
• Escapes ~/e()
• Expressions
• Keyframe blocks
• Color functions:
  • lighten
  • darken
  • saturate
  • desaturate
  • spin
  • hue
  • mix
  • saturation
  • lightness
• Other functions:
  • round
  • increment
  • decrement
  • format '%('
  • add
  • iscolor
  • isnumber
  • isurl
  • isstring
  • iskeyword
• Keyframe blocks

Differences from less.js

• All MS filters and other strange vendor constructs must be escaped
• All colors are auto-formatted to #nnnnnn. eg, #f7e923
• Does not preserve css comments

Not supported

• JavaScript evaluation

License

See the LICENSE file