grunt-clean-ts-extends ported to gulp!.
If you first compile all your TypeScript sources and then concatenate them into one file you might get quite a lot of __extends declarations. This plugin leaves the first one and removes all following.
Works only with non-minified JavaScript!
npm install gulp-clean-ts-extends --save
var ts = require('gulp-typescript');
var concat = require('gulp-concat');
var sourcemaps = require('gulp-sourcemaps');
var cleants = require('gulp-clean-ts-extends');
gulp.task('scripts', function() {
var tsResult = gulp.src('lib/*.ts')
.pipe(sourcemaps.init())
.pipe(ts({
sortOutput: true,
// ...
}));
return tsResult.js
.pipe(concat('output.js'))
.pipe(cleants()) // remove all __extends declarations except the first one
.pipe(sourcemaps.write())
.pipe(gulp.dest('release/js'));
}); npm test