ng add @angular/pwa fails with 'Invalid rule result: Function().'

[mruknowme]

Bug Report or Feature Request (mark with an x)

- [x] bug report -> please search issues before submitting
- [ ] feature request

Command (mark with an x)

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

Versions

node --version
v10.2.1

ng --version

     _                      _                 ____ _     ___
    / \   _ __   __ _ _   _| | __ _ _ __     / ___| |   |_ _|
   / △ \ | '_ \ / _` | | | | |/ _` | '__|   | |   | |    | |
  / ___ \| | | | (_| | |_| | | (_| | |      | |___| |___ | |
 /_/   \_\_| |_|\__, |\__,_|_|\__,_|_|       \____|_____|___|
                |___/


Angular CLI: 6.0.8
Node: 10.2.1
OS: darwin x64
Angular: 6.0.9
... animations, common, compiler, compiler-cli, core, forms
... http, language-service, platform-browser
... platform-browser-dynamic, router

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.6.8
@angular-devkit/build-angular     0.6.8
@angular-devkit/build-optimizer   0.6.8
@angular-devkit/core              0.6.8
@angular-devkit/schematics        0.6.8
@angular/cli                      6.0.8
@angular/pwa                      0.7.0
@ngtools/webpack                  6.0.8
@schematics/angular               0.6.8
@schematics/update                0.6.8
rxjs                              6.2.2
typescript                        2.7.2
webpack                           4.8.3

npm --version
6.2.0

Repro steps

ng new projectName --routing --prefix=prfx --style=scss && cd projectName && ng add @angular/pwa

The log given by the failure

ng add @angular/pwa
Installing packages for tooling via npm.
+ @angular/pwa@0.7.0
updated 1 package and audited 26697 packages in 6.57s
found 13 vulnerabilities (9 low, 4 high)
  run `npm audit fix` to fix them, or `npm audit` for details
Installed packages for tooling via npm.
Invalid rule result: Function().

Mention any other details that might be useful

[bobweeman]

@mruknowme Do you have a solution yet. Am having the same issue.

[proeben]

Same problem here. 6.1.0 doesnt work either (different error). I tried to downgrade and got this.

[gsphamnguyen]

You should to use @angular/pwa@0.6.8. Goodluck!

[gkalpak]

Sounds similar to #11640 (although the error message is different).

[hansl]

This is due to a new feature in Schematics that you can now return a Rule in a Schematics. Unfortunately, that means some Schematics are not backward compatible.

We will release a patch that will fix this, but in the meantime you can update @angular-devkit/schematics to 0.7.0 and it will fix the issue.

[Shubedobedo]

@hansl after updating now I get "Path "/ngsw-config.json" already exist."

[odineshrao]

Same problem, i thing there is bugs in pwa@0.7.1, you need to use lower version, after that works fine

[dgpuranik]

@hansl I am using @angular-devkit/schematics 0.7.1. I still get same error. @odineshrao I tried installing lower version pwa@0.7.0 but still get same error. Do you know which lower version work proper?

[dgpuranik]

@odineshrao 0.6.8 worked.