angular-cn/tools/broccoli/traceur/index.ts

45 lines
1.5 KiB
TypeScript

var fs = require('fs');
var fse = require('fs-extra');
var path = require('path');
var traceur = require('../../transpiler');
var walkSync = require('walk-sync');
var Writer = require('broccoli-writer');
var xtend = require('xtend');
class TraceurFilter extends Writer {
constructor(private inputTree, private options = {}) {}
write(readTree, destDir) {
return readTree(this.inputTree)
.then(srcDir => {
walkSync(srcDir)
.filter(filepath => {
var extension = path.extname(filepath).toLowerCase();
return extension === '.js' || extension === '.es6';
})
.map(filepath => {
var options = xtend({filename: filepath}, this.options);
var fsOpts = {encoding: 'utf-8'};
var sourcecode = fs.readFileSync(path.join(srcDir, filepath), fsOpts);
var result = traceur.compile(options, filepath, sourcecode);
result.js = result.js + '\n//# sourceMappingURL=./' + path.basename(filepath).replace(/\.\w+$/, '.map');
var destFilepath = filepath.replace(/\.\w+$/, '.es6');
var destFile = path.join(destDir, destFilepath);
fse.mkdirsSync(path.dirname(destFile));
var destMap = path.join(destDir, filepath + '.map');
fs.writeFileSync(destFile, result.js, fsOpts);
result.sourceMap.file = destFilepath;
fs.writeFileSync(destMap, JSON.stringify(result.sourceMap), fsOpts);
});
});
}
}
module.exports = TraceurFilter;