These async methods are a replacement for the Observable based `runSchematicAsync` and `runExternalSchematicAsync` methods.
DEPRECATED:
The Observable based `SchematicTestRunner.runSchematicAsync` and `SchematicTestRunner.runExternalSchematicAsync` method have been deprecated in favor of the Promise based `SchematicTestRunner.runSchematic` and `SchematicTestRunner.runExternalSchematic`.
With this change we change the how we handle `"format": "path"` schematic property option. We replace the formatter in favour of a `SmartDefaultProvider`, which ensures that nested schematics can access the `workingDirectory`.
With this change we removed several deprecated `@schematics/angular` deprecated options.
BREAKING CHANGE:
We removed several deprecated `@schematics/angular` deprecated options.
- `lintFix` have been removed from all schematics. `ng lint --fix` should be used instead.
- `legacyBrowsers` have been removed from the `application` schematics since IE 11 is no longer supported.
- `configuration` has been removed from the `web-worker` as it was unused.
- `target` has been removed from the `service-worker` as it was unused.
An internal schematics helper rule has been introduced for Angular schematics that only generate a set of project files from a set of templated files. Multiple current generation schematics contained essentially the same code which increased the sustainment burden and made refactoring and improvements more complicated.
All TypeScript files have been updated to pass the new eslint-based linting checks. eslint compatible disabling comments have also been added in place of the previous tslint comments.
It's confusing and redundant to use `When true` and `when false` in descriptions for a CLI arguments because specifying false/true is redundant in a command line argument flag and in most cases users will not do it.
Example:
`--foo=true` is the same as `--foo`
`--foo=false` is the same as `--no-foo`
Since will remove lintFix usage warnings when the option is set by a default of another schematic.
Example when executing
```
ng generate module customers --route customers --module app.module
```
The lintFix default of the module schematic will be passed down to the component schematic which would cause a warning to be shown.
Closes#19169
Currently when using `ivy-ngcc` it will print out a warning
```
Failed to read entry point info from //node_modules/@schematics/angular/workspace/files/package.json with error SyntaxError: Unexpected token < in JSON at position 1121.
```
Fixes#13378
