cli feature idea: list generator tasks / help and list available generators

[tunnckoCore]

Would be good to be able to list generator tasks - not all, but maybe that are not silenced? only the main, without the aliases. Also generator help task if exist.

Something like that

# list generate-project tasks
$ gen project --tasks

# list generate-node tasks
$ gen node --tasks
$ gen node --list-tasks?
$ gen node --list?

# list 
$ gen foo bar --tasks
$ gen foo bar baz qux --tasks

Hm. So, maybe would make more sense if I rephrase it to per generator options.

And just popup one more thing in my mind - list available generators (globally/locally installed).

Maybe something like

# list globally installed generators
$ gen --list

# list locally installed
$ gen --list-local

# list sub-generators of `foo` generator
$ gen foo --list
$ gen foo --list-local

# list tasks of `foo` generator
$ gen foo --tasks

# list sub-sub-sub-generator
$ gen foo bar baz --list

---

edit: Or.. because this looks a bit complex. maybe better option can be to list them all through core generate command. Or maybe even in help command (of course only the top generators, not their sub-generators) like:

$ gen list
Globally installed generators 

Path: /home/user/path/to/global/location
List: foo, bar, project
dest
node
mocha
gitignore

$ gen list-local
Locally installed generators

Path: ~/path/to/cwd/location
List: meow, car, train

$ gen list-tasks [generator-name]
# or
$ gen tasks [generator-name]

[jonschlinkert]

I just realized the docs on this repo suck, but it has a method that prompts for tasks

we can probably expose that in a generator so it's available globally when you install it globally