Go Liquid Template Parser

goliquid is a very early-stage Go implementation of the Shopify Liquid template language, for use in Gojekyll.

Status

• Basics
  • Literals
    • String Escapes
  • Variables
  • Operators
  • Arrays
  • Whitespace Control
• Tags
  • Comment
  • Control Flow
    • if/else/elsif
    • unless
    • case/when
  • Iteration
    • modifiers
      • limit
      • offset
      • range
      • reversed
    • break, continue
    • loop variables
    • tablerow
    • cycle
  • Raw
  • Variable
    • Assign
    • Capture
• Filters
  • some
  • all

Install

go get -u github.com/osteele/goliquid

Contribute

Setup

make setup

Install Ragel. On macOS: brew install ragel.

Workflow

go generate ./...
go test ./...

Test just the scanner:

cd expressions
ragel -Z scanner.rl && go test

References

https://shopify.github.io/liquid

https://help.shopify.com/themes/liquid

https://github.com/Shopify/liquid/wiki/Liquid-for-Designers

Attribution

Kyoung-chan Lee's https://github.com/leekchan/timeutil for formatting dates.

Michael Hamrah's Lexing with Ragel and Parsing with Yacc using Go was essential to understanding go yacc.

The original Liquid engine, of course, for the design and documentation of the Liquid template language.

(That said, this is a clean-room implementation to make sure it just implements the documented design.)

License

MIT License