Circular dependencies, like `app.module.ts` importing `app.component.ts` which in turn imports `app.module.ts`, now display a warning during builds:
```
kamik@T460p MINGW64 /d/sandbox/master-project (master)
$ ng build
Hash: 3516b252f4e32d6c5bb8
Time: 8693ms
chunk {0} polyfills.bundle.js, polyfills.bundle.js.map (polyfills) 160 kB {4} [initial] [rendered]
chunk {1} main.bundle.js, main.bundle.js.map (main) 5.95 kB {3} [initial] [rendered]
chunk {2} styles.bundle.js, styles.bundle.js.map (styles) 10.5 kB {4} [initial] [rendered]
chunk {3} vendor.bundle.js, vendor.bundle.js.map (vendor) 1.88 MB [initial] [rendered]
chunk {4} inline.bundle.js, inline.bundle.js.map (inline) 0 bytes [entry] [rendered]
WARNING in Circular dependency detected:
src\app\app.module.ts -> src\app\app.component.ts -> src\app\app.module.ts
WARNING in Circular dependency detected:
src\app\app.component.ts -> src\app\app.module.ts -> src\app\app.component.ts
```
It is important to detect and eliminate circular dependencies because leaving them in might lead to `Maximum call stack size exceeded` errors, or imports being `undefined` at runtime.
To remove these warnings from your project you can factor out the circular dependency into a separate module.
For instance, if module A imports `foo` from module B, and module B imports `bar` from module A, it is enough to extract `foo` into module C.
You can turn off these warnings by running ng set apps.0.hideCircularDependencyWarnings=true. This will add the "hideCircularDependencyWarnings": true value to your .angular-cli.json and disable the warnings.
Fix#6309Fix#6739
If there is a need to define multiple entries or otherwise more complex configuration a js file can be used to configure the proxy. These changes document how to do so.
* for several options that are saved in .angular-cli.json, I've added an explanation of what setting in the json file controls that options.
* added an explanation about what --dry-run will output.
* added possible values for --style option
* added respective documentation in the command
* also added less, sass and styl(stylus) as possible style extensions
The motivation for this change is that sometimes people would want to change some of the settings set by the cli durig ng new, that they might have not known or cared about, for example, prefix.
* add an explanation about what --dry-run will output
* add an explanation about what --lint-fix will do
* add an explanation about how to set default to use lint always
* add an explanation about what --verbose will do
Two new flags are added to `ng serve`:
- `--public-host` (aliased by `--live-reload-client): Specify the URL that the browser client will use.
- `--disable-host-check`: Don't verify connected clients are part of allowed hosts.
Setting `--disable-host-check` will output a warning:
```
WARNING Running a server with --disable-host-check is a security risk. See https://medium.com/webpack/webpack-dev-server-middleware-security-issues-1489d950874a for more information.
```
See #6070 for more context about this change.
Fix#6070
