Feature idea: --one-list

[bwood]

Use case: I'm creating a php data file to serve as a data source for script. E.g. I want to get https:info data into a file so that a script that needs that data doesn't have to exec https:info for each site.

Currently if you choose a terminus option like--format=var_export you (understandably) get multiple arrays:

$ terminus genie --name=example --env=live -- https:info --format=var_export
array (
  'live-upgrade-example-kl-01.pantheon.foobar.com' =>
  array (
    'id' => 'live-upgrade-example-kl-01.pantheon.foobar.com',
    'type' => 'vanity',
    'status' => 'OK',
    'status_message' => 'Launched',
    'deletable' => 'false',
  ),
  'live-upgrade-example-kl-01.pantheonsite.io' =>
  array (
    'id' => 'live-upgrade-example-kl-01.pantheonsite.io',
    'type' => 'platform',
    'status' => 'OK',
    'status_message' => 'Launched',
    'deletable' => 'false',
  ),
)
array (
  'www.open.foobar.com' =>
  array (
    'id' => 'www.open.foobar.com',
    'type' => 'custom',
    'status' => 'OK',
    'status_message' => 'Launched',
    'deletable' => 'true',
  ),
  'live-example.pantheon.foobar.com' =>
  array (
    'id' => 'live-example.pantheon.foobar.com',
    'type' => 'vanity',
    'status' => 'OK',
    'status_message' => 'Launched',
    'deletable' => 'false',
  ),
)

It'd be useful if you could pass --one-list or some named option to get this:

$ terminus genie --name=example --env=live -- https:info --format=var_export
array (
  'live-upgrade-example-kl-01.pantheon.foobar.com' =>
  array (
    'id' => 'live-upgrade-example-kl-01.pantheon.foobar.com',
    'type' => 'vanity',
    'status' => 'OK',
    'status_message' => 'Launched',
    'deletable' => 'false',
  ),
  'live-upgrade-example-kl-01.pantheonsite.io' =>
  array (
    'id' => 'live-upgrade-example-kl-01.pantheonsite.io',
    'type' => 'platform',
    'status' => 'OK',
    'status_message' => 'Launched',
    'deletable' => 'false',
  ),
  'www.open.foobar.com' =>
  array (
    'id' => 'www.open.foobar.com',
    'type' => 'custom',
    'status' => 'OK',
    'status_message' => 'Launched',
    'deletable' => 'true',
  ),
  'live-example.pantheon.foobar.com' =>
  array (
    'id' => 'live-example.pantheon.foobar.com',
    'type' => 'vanity',
    'status' => 'OK',
    'status_message' => 'Launched',
    'deletable' => 'false',
  ),
)

This probably applies to some of the other --format options.