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90 lines
2.0 KiB
Markdown
90 lines
2.0 KiB
Markdown
# Go Liquid Template Parser
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`goliquid` is a very early-stage Go implementation of the [Shopify Liquid template language](https://shopify.github.io/liquid), for use in [Gojekyll](https://github.com/osteele/gojekyll).
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## Status
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[](https://travis-ci.org/osteele/liquid)
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[](https://goreportcard.com/report/github.com/osteele/liquid)
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- [ ] Basics
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- [x] Literals
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- [ ] String Escapes
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- [x] Variables
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- [ ] Operators
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- [x] Arrays
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- [ ] Whitespace Control
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- [ ] Tags
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- [x] Comment
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- [ ] Control Flow
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- [x] `if`/`else`/`elsif`
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- [x] `unless`
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- [ ] `case`/`when`
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- [ ] Iteration
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- [x] modifiers
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- [ ] `limit`
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- [ ] `offset`
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- [ ] `range`
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- [x] `reversed`
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- [ ] `break`, `continue`
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- [ ] loop variables
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- [ ] `tablerow`
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- [ ] `cycle`
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- [x] Raw
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- [ ] Variable
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- [x] Assign
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- [ ] Capture
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- [ ] Filters
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- [x] some
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- [ ] all
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## Install
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`go get -u github.com/osteele/goliquid`
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## Contribute
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### Setup
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```bash
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make setup
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```
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Install Ragel. On macOS: `brew install ragel`.
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### Workflow
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```bash
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go generate ./...
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go test ./...
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```
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Test just the scanner:
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```bash
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cd expressions
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ragel -Z scanner.rl && go test
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```
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## References
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<https://shopify.github.io/liquid>
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<https://help.shopify.com/themes/liquid>
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<https://github.com/Shopify/liquid/wiki/Liquid-for-Designers>
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## Attribution
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Kyoung-chan Lee's <https://github.com/leekchan/timeutil> for formatting dates.
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Michael Hamrah's [Lexing with Ragel and Parsing with Yacc using Go](https://medium.com/@mhamrah/lexing-with-ragel-and-parsing-with-yacc-using-go-81e50475f88f) was essential to understanding `go yacc`.
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The [original Liquid engine](https://shopify.github.io/liquid), of course, for the design and documentation of the Liquid template language.
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(That said, this is a clean-room implementation to make sure it just implements the documented design.)
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## License
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MIT License
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