coffeescript-loader/index.js

coffeescript 2 loader for webpack

var coffeescript = require("coffeescript");
var loaderUtils = require("loader-utils");


module.exports = function(source) {
	this.cacheable && this.cacheable();
	var coffeeRequest = loaderUtils.getRemainingRequest(this);
	var jsRequest = loaderUtils.getCurrentRequest(this);
	var query = loaderUtils.parseQuery(this.query);

	try {
		var result = coffeescript.compile(source, {
			literate: query.literate,
			filename: coffeeRequest,
			debug: this.debug,
			bare: true,
			sourceMap: true,
			sourceRoot: "",
			sourceFiles: [coffeeRequest],
			generatedFile: jsRequest
		});

	} catch (e) {
		var err = "";
		if (e.location == null || e.location.first_column == null || e.location.first_line == null) {
			err += "Got an unexpected exception from the coffeescript compiler. The original exception was: " + e + "\n";
			err += "(The coffeescript compiler should not raise *unexpected* exceptions. You can file this error as an issue of the coffeescript compiler: https://github.com/jashkenas/coffeescript/issues)\n";
		} else {
			var codeLine = source.split("\n")[e.location.first_line];
			var offendingCharacter = (e.location.first_column < codeLine.length) ? codeLine[e.location.first_column] : "";
			err += e + "\n";
			// log erroneous line and highlight offending character
			err += "    L" + e.location.first_line + ": " + codeLine.substring(0, e.location.first_column) + offendingCharacter + codeLine.substring(e.location.first_column + 1) + "\n";
			err += "         " + (new Array(e.location.first_column + 1).join(" ")) + "^\n";
		}
		throw new Error(err);
	}

	var map = JSON.parse(result.v3SourceMap);
	map.sourcesContent = [source];
	this.callback(null, result.js, map);
}

module.exports.seperable = true;