Sourcemap Parser

A sourcemap parser in crystal, using vlq encoding.

This repo use changed code from the repo ConradIrwin/ruby-source_map. Thanks Conrad Irwin!

Installation

1. Add the dependency to your shard.yml:

   dependencies:
     sourcemap:
       github: confact/sourcemap
   

2. Run shards install

Usage

require "sourcemap"

Get a sourcemap from a sourcemap file:

Sourcemap::Parser.from_file("sourcemap.js.map")

Get a sourcemap from a sourcemap json string:

Sourcemap::Parser.from_string(sourcemap_string)

To get the mappings of the sourcemap:

sourcemap = Sourcemap::Parser.from_file("sourcemap.js.map")

sourcemap.parsed_mappings

It will return an array of Sourcemap::Mapping. Those mappings can be used to get the original source code and the original line and column.

Retrive all mappings for a line and column:

sourcemap = Sourcemap::Parser.from_file("sourcemap.js.map")

mapping = sourcemap.mapping_for(1, 1)

Get mappings for specific source file:

sourcemap = Sourcemap::Parser.from_file("sourcemap.js.map")

sourcemap.mappings_for_source("sourcemap.js")

Development

clone the repo and see the code and test the specs. the specs can be run with crystal spec

Contributing

1. Fork it (https://github.com/confact/sourcemap/fork)
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request

Contributors

• Håkan - creator and maintainer