Regression in 7.3.0 when choosing SASS as preprocessor

[wkurniawan07]

🐞 Bug report

Command (mark with an x)

- [x] new
- [x] build
- [x] serve
- [ ] test
- [ ] e2e
- [ ] generate
- [ ] add
- [ ] update
- [ ] lint
- [ ] xi18n
- [ ] run
- [ ] config
- [ ] help
- [ ] version
- [ ] doc

Is this a regression?

Yes, the previous version in which this bug was not present was: All 7.x before 7.3.0

Description

When choosing Sass as the stylesheet preprocessor, CLI produces styles.scss but angular.json expects styles.sass.
Previous available choice of "Scss" is gone.

🔬 Minimal Reproduction

1. ng new
2. Choose Sass as the stylesheet format
3. ng build or ng serve

🔥 Exception or Error

ERROR in multi ./src/styles.sass
Module not found: Error: Can't resolve '[...]/src/styles.sass' in '[...]'

[...] above refers to the project folder.

[webcourse-ng]

Thank you, wkurniawan07! I spent a good half a day wrestling this one... checked my setup environment in a million places after not finding anything on Google yesterday. Even started a thread on Stack Overflow: https://stackoverflow.com/questions/54463979/angular-7-cli-generated-project-throws-error-in-multi-src-styles-sass

[robvaneck]

I have the same bug. Just updated my CLI to latest 7.3.0 and then created a new project... choose sass.. (which is scss)

but there is a typo in the cli source code (i guess)

The angular.json is invalid:

  "projects": {
    "angular-skeleton": {
      "schematics": {
        "@schematics/angular:component": {
          "style": "sass"
        }
      },
      "architect": {
        "build": {
          "builder": "@angular-devkit/build-angular:browser",
          "options": {
            "styles": [
              "src/styles.sass"
            ],

sass should be scss here

[DanJFletcher]

I have zero experience with the internals of Angular but could this bug be caused by line 129 in this file? https://github.com/angular/angular-cli/blob/master/packages/schematics/angular/ng-new/schema.json

I'm wondering if value is supposed to be scss and not sass. I have no idea how the templates actually get generated so I could be way off. But without running the tool in a local dev environment it's my best guess.