56 lines
2.2 KiB
TypeScript
56 lines
2.2 KiB
TypeScript
/// <reference path="../broccoli-writer.d.ts" />
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/// <reference path="../../typings/fs-extra/fs-extra.d.ts" />
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/// <reference path="../../typings/node/node.d.ts" />
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import fs = require('fs');
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import fse = require('fs-extra');
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import path = require('path');
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var traceur = require('../../../tools/transpiler');
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var walkSync = require('walk-sync');
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import Writer = require('broccoli-writer');
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var xtend = require('xtend');
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class TraceurFilter extends Writer {
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static RUNTIME_PATH = traceur.RUNTIME_PATH;
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constructor(private inputTree, private destExtension: string,
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private destSourceMapExtension: string, private options = {}) {
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super();
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}
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write(readTree, destDir) {
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return readTree(this.inputTree)
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.then(srcDir => {
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walkSync(srcDir)
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.filter(filepath =>
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{
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var extension = path.extname(filepath).toLowerCase();
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return extension === '.js' || extension === '.es6' || extension === '.cjs';
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})
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.map(filepath => {
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var options = xtend({filename: filepath}, this.options);
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var fsOpts = {encoding: 'utf-8'};
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var sourcecode = fs.readFileSync(path.join(srcDir, filepath), fsOpts);
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var result = traceur.compile(options, filepath, sourcecode);
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// TODO: we should fix the sourceMappingURL written by Traceur instead of overriding
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// (but we might switch to typescript first)
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var mapFilepath = filepath.replace(/\.\w+$/, '') + this.destSourceMapExtension;
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result.js = result.js + '\n//# sourceMappingURL=./' + path.basename(mapFilepath);
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var destFilepath = filepath.replace(/\.\w+$/, this.destExtension);
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var destFile = path.join(destDir, destFilepath);
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fse.mkdirsSync(path.dirname(destFile));
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fs.writeFileSync(destFile, result.js, fsOpts);
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var destMap = path.join(destDir, mapFilepath);
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result.sourceMap.file = destFilepath;
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fs.writeFileSync(destMap, JSON.stringify(result.sourceMap), fsOpts);
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});
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});
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}
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}
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module.exports = TraceurFilter;
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