Add thor help command to view all subcommands simultaneously

[hlascelles]

I would like to be able to see all thor commands and subcommands in one go.

ie not:

❯ myapp --help
Commands:
  myapp foo            # Foo commands
  myapp qux            # Qux commands

❯ myapp foo --help
Commands:
  myapp foo baz        # Baz!
  myapp foo bar        # Bar!

I would like:

❯ myapp --tree-help
Commands:
  myapp foo            # Foo commands
  myapp foo baz        # Baz!
  myapp foo bar        # Bar!
  myapp qux            # Qux commands
  myapp qux pop        # Pop!

The switch could be one of:

myapp --tree-help
myapp  --help-tree
myapp --help --tree
myapp --tree
....

If you think this would be useful I could have a go... Or does something like it exist?

[hlascelles]

And/or to put it another way, how do I find a command where I know the subcommand is baz? (That happens to be my usecase).

But I would also like to print out a tree too!

[hlascelles]

@rafaelfranca @yahonda If I had a go at this would it be well received?

[rafaelfranca]

I think if it is a flag to the command, I see no problem with doing this.

[hlascelles]

@rafaelfranca I've had an initial go here: #906

It exposes it as a simple command like app tree and as app --tree. Let me know how you would like it improved!