Combining Multiple SASS files into one SASS file - sass

Question

Does anyone know if there is a way to combine multiple SASS/SCSS files into one SASS/SCSS file. I do mean "into one SASS/SCSS" and not into a CSS file.
For example, I have 3 scss files:
app.scss
base.scss
layout.scss
The app.scss file contains 2 imports to base.scss and layout.scss.
I would like to beable to generate 1 SCSS file that basically concatenates the files and does not process the sass.
It's fairly difficult to search for as everything that gets return is to do with combining into CSS.
Why would I want to do this? Basically, I'd like to easily reference a set of SCSS files from within a codepen (other online code editor).
Thanks

Answer 1

I analyze all files by the mask, find all imports inside and concatenate into one file. So I don't need one entry point
npm install -D bundle-scss
"script": {
"postbuild": "npm run themes",
"themes": "bundle-scss -m \"./src/**/*.theme.scss\" -d \"./dist/themes.scss\""
}

Answer 2

scss-bundle solves this problem
https://github.com/reactway/scss-bundle
Caution: Does not support newer module based imports. Issue #90

Answer 3

You could modify this for javascript. Kept it in typescript as I am currently solving this issue on my own (angular 6 library), and ran into this question.
According to the docs, angular material uses this implementation.
import * as path from 'path';
import { Bundler } from 'scss-bundle';
import * as fs from 'fs';
(async () => {
// Absolute project directory path.
// Assuming all of your scss files are in `./projects/my-library/src/styles`
const projectDirectory = path.resolve(__dirname, './projects/my-library/src/styles');
const bundler = new Bundler(undefined, projectDirectory);
// Relative file path to project directory path.
// The name of your file here would be `app.scss`
// Kept this here if anyone runs into this answer and wants to do this with the new angular 6 library.
const { found, bundledContent } = await bundler.Bundle('./_all-theme.scss');
if (found && bundledContent) {
// where you want to save the file, and what you would like it to be called.
const location = path.resolve(__dirname, '_theming.scss');
fs.writeFileSync(location, bundledContent);
}
})();