Currently, we don't register all available commands. For instance, when the CLI is ran inside a workspace the `new` command is not registered. Thus, this will cause a confusing error message when `ng new` is ran inside a workspace.
Example:
```
$ ng new
Error: Unknown command. Did you mean e?
```
With this commit we change this by registering all the commands and valid the command scope during the command building phase which is only triggered once the command is invoked but prior to the execution phase.
Apart from better code quality, this helps reduce the time of CLI bootstrapping time, as retrieving the package manager name is a rather expensive operator due to the number of process spawns.
The package manager name isn't always needed until we run a command and therefore in some cases we can see an improvement of around `~600ms`. Ex: `ng b --help`. From ` 1.34s` to `0.76s`.
This will be important when we eventually introduce auto complete as users will get faster loopback.
The `schematicCollections` can be placed under the `cli` option in the global `.angular.json` configuration, at the root or at project level in `angular.json` .
```jsonc
{
"$schema": "./node_modules/@angular/cli/lib/config/schema.json",
"version": 1,
"cli": {
"schematicCollections": ["@schematics/angular", "@angular/material"]
}
// ...
}
```
**Rationale**
When this option is not configured and a user would like to run a schematic which is not part of `@schematics/angular`,
the collection name needs to be provided to `ng generate` command in the form of `[collection-name:schematic-name]`. This make the `ng generate` command too verbose for repeated usages.
This is where `schematicCollections` comes handle. When adding `@angular/material` to the list of `schematicCollections`, the generate command will try to locate the schematic in the specified collections.
```
ng generate navigation
```
is equivalent to:
```
ng generate @angular/material:navigation
```
**Conflicting schematic names**
When multiple collections have a schematic with the same name. Both `ng generate` and `ng new` will run the first schematic matched based on the ordering (as specified) of `schematicCollections`.
DEPRECATED:
The `defaultCollection` workspace option has been deprecated in favor of `schematicCollections`.
Before
```json
"defaultCollection": "@angular/material"
```
After
```json
"schematicCollections": ["@angular/material"]
```
Closes#12157
