rollup cache is not invalidated when external templates or styles are edited

[robianmcd]

If I enable rollup's cache option then changes to html files and css files will be ignored until their component is edited. e.g. with the following gulpfile

var gulp = require('gulp');
var rollup = require('rollup').rollup;
var angular = require('rollup-plugin-angular');
var typescript = require('rollup-plugin-typescript');
var nodeResolve = require('rollup-plugin-node-resolve');
var commonjs = require('rollup-plugin-commonjs');

var rollUpBundle;
gulp.task('rollup', function () {
    var rollupConfig = {
        entry: 'src/app.component.ts',
        cache: rollUpBundle,
        plugins: [
            angular(),
            typescript(),
            nodeResolve({ jsnext: true, main: true }),
            commonjs({include: 'node_modules/rxjs/**'})]
    };

    return rollup(rollupConfig)
        .then(function (bundle) {
            rollUpBundle = bundle;

            return bundle.write({
                format: 'iife',
                dest: 'dist/app.js'
            });
        });
});

gulp.task('default', ['rollup'], function () {
    gulp.watch('src/**', ['rollup']);
});

and the following component

import {Component} from '@angular/core';

@Component({
    selector: 'my-app',
    templateUrl: 'app.component.html'
})
class AppComponent {

}

editing app.component.html will not change the bundle that rollup outputs.

Attached is a minimal app that reproduces the issue
rollup-angular.zip

Reproduce by running

npm install
gulp

edit app.component.html and note that the changes are not added to the app.js bundle unless you edit app.component.ts

[cebor]

Yes, you are right. I don't know the the rollup plugin system very well, to achieve this.

It's just a port of https://github.com/TheLarkInn/angular2-template-loader.

But feel free to create a PR.

[cebor]

FYI: https://github.com/rollup/rollup/wiki/Plugins#creating-plugins

[robianmcd]

I took a look at how caching works in rollup and I'm not sure if it is possible for a plugin like this to invalidate the cache when it needs to. I opened an issue on Rollup to get some input