index.js

var es = require('event-stream');
var iced = require('iced-coffee-script');
var gutil = require('gulp-util');
var Buffer = require('buffer').Buffer;
var path = require('path');

module.exports = function (opt) {
        function modifyFile(file) {
                if (file.isNull()) return this.emit('data', file); // pass along
                if (file.isStream()) return this.emit('error', new Error("gulp-iced: Streaming not supported"));

                var str = file.contents.toString('utf8');
                var dest = gutil.replaceExtension(file.path, ".js");

                var options = {
                        literate: /\.(litcoffee|coffee\.md)$/.test(file.path)
                };

                if (opt) {
                        options = {
                                bare: opt.bare != null ? !! opt.bare : false,
                                runtime: opt.runtime != null ? opt.runtime : 'node',
                                literate: opt.literate != null ? !! opt.literate : options.literate,
                                sourceMap: opt.sourceMap != null ? !! opt.sourceMap : false,
                                filename: file.path,
                                sourceFiles: [path.basename(file.path)],
                                generatedFile: path.basename(dest)
                        }
                }

                try {
                        data = iced.compile(str, options);
                } catch (err) {
                        return this.emit('error', new Error(err));
                }

                if (options.sourceMap) {
                        sourceMapFile = new gutil.File({
                                cwd: file.cwd,
                                base: file.base,
                                path: dest + '.map',
                                contents: new Buffer(data.v3SourceMap)
                        });
                        this.emit('data', sourceMapFile);
                        data = data.js + "\n/*\n//# sourceMappingURL=" + path.basename(sourceMapFile.path) + "\n*/\n";
                }
                file.contents = new Buffer(data);
                file.path = dest;
                this.emit('data', file);
        }

        return es.through(modifyFile);
};