ng update error message: Cannot find module 'tslint'.

🐞 Bug report

Command (mark with an x)

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

Is this a regression?

Description

It seems like some part of angular-cli uses tslint to perform some migration step from Angular 7 to Angular 8. When running npm update @angular/cli @angular/core @angular/material, the procedure crashes after static query migration is performed. After installing tslint, it does not crash anymore, but our environment does not make use of tslint and it doesn’t seem to be a dependency of angular-cli either.

🔬 Minimal Reproduction

• Have an Angular 7 project without tslint
• Run ng update @angular/cli @angular/core @angular/material

🔥 Exception or Error

Cannot find module 'tslint'

🌍 Your Environment

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


Angular CLI: 7.3.9
Node: 10.14.2
OS: win32 x64
Angular: 7.2.15
... animations, common, compiler, compiler-cli, core, forms
... language-service, platform-browser, platform-browser-dynamic
... router

Package                           Version
-----------------------------------------------------------
@angular-devkit/architect         0.13.9
@angular-devkit/build-angular     0.13.9
@angular-devkit/build-optimizer   0.13.9
@angular-devkit/build-webpack     0.13.9
@angular-devkit/core              7.3.9
@angular-devkit/schematics        7.3.9
@angular/cdk                      7.3.7
@angular/cli                      7.3.9
@angular/material                 7.3.7
@ngtools/webpack                  7.3.9
@schematics/angular               7.3.9
@schematics/update                0.13.9
rxjs                              6.5.2
typescript                        3.2.4
webpack                           4.29.0

Anything else relevant?

[dgp1130]

Thanks for the clarification @devversion. Seems like this can still happen then, so I’m reopening the issue. We’ll need to address that usage or add better warnings for this case.

[angular-automatic-lock-bot[bot]]

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