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95 lines
2.3 KiB
JavaScript
95 lines
2.3 KiB
JavaScript
var coffee = require('coffee-script');
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var through = require('through');
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var convert = require('convert-source-map');
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function isCoffee (file) {
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return (/\.((lit)?coffee|coffee\.md)$/).test(file);
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}
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function isLiterate (file) {
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return (/\.(litcoffee|coffee\.md)$/).test(file);
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}
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function ParseError(error, src, file) {
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/* Creates a ParseError from a CoffeeScript SyntaxError
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modeled after substack's syntax-error module */
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SyntaxError.call(this);
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this.message = error.message;
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this.line = error.location.first_line + 1; // cs linenums are 0-indexed
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this.column = error.location.first_column + 1; // same with columns
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var markerLen = 2;
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if(error.location.first_line === error.location.last_line) {
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markerLen += error.location.last_column - error.location.first_column;
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}
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this.annotated = [
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file + ':' + this.line,
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src.split('\n')[this.line - 1],
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Array(this.column).join(' ') + Array(markerLen).join('^'),
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'ParseError: ' + this.message
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].join('\n');
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}
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ParseError.prototype = Object.create(SyntaxError.prototype);
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ParseError.prototype.toString = function () {
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return this.annotated;
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};
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ParseError.prototype.inspect = function () {
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return this.annotated;
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};
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function compile(file, data, callback) {
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var compiled;
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try {
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compiled = coffee.compile(data, {
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sourceMap: true,
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generatedFile: file,
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inline: true,
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bare: true,
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literate: isLiterate(file)
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});
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} catch (e) {
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var error = e;
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if (e.location) {
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error = new ParseError(e, data, file);
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}
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callback(error);
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return;
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}
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var map = convert.fromJSON(compiled.v3SourceMap);
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map.setProperty('sources', [file]);
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callback(null, compiled.js + '\n' + map.toComment());
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}
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function coffeeify(file) {
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if (!isCoffee(file)) return through();
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var data = '', stream = through(write, end);
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return stream;
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function write(buf) {
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data += buf;
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}
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function end() {
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compile(file, data, function(error, result) {
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if (error) stream.emit('error', error);
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stream.queue(result);
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stream.queue(null);
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});
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}
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}
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coffeeify.compile = compile;
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coffeeify.isCoffee = isCoffee;
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coffeeify.isLiterate = isLiterate;
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module.exports = coffeeify;
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