SourcyPants

Simple source map parser for .NET Standard. Based on SourceMapDotNet, which titles itself as a "port of a small portion of Mozilla's source-map module to .NET intended for reading a source map".

This project goes a bit further, and adds support for asking "what line and column number in the original source does line X and column Y in the generated source map to?" instead of just what line.

It also handles a bit more for display purposes, such as supporting SourceRoot and method names.

Usage

Build a SourceMapConsumer by either supplying the JSON contents of a source map file:

var consumer = new Sourcypants.SourceMapConsumer("{ source: 'map', goes: 'here'
}");

Or build directly from a SourceMapFile instance, built using your JSON decoder of choice:

var file = JsonConvert.Deserialize<Sourcypants.SourceMapFile>("{ source: 'map',
goes: 'here' }");
var consumer = new Sourcypants.SourceMapConsumer(file);

Then find out which original source lines map to a given generated source line number (line numbers are 1-based):

// Get the original source lines that map to line 12, column 0 of the generated
source
var matches = consumer.OriginalPositionsFor(12, 0);

foreach (var match in matches)
{
    var line = match.LineNumber;
    var filename = match.File;
    
    // Do useful things...
}

An empty array is returned if there are no matching original source lines for the specified generated source line.

License

MIT licensed