`apt::ppa` and `apt::setting` don't actually include `apt::update` so
anchors are unnecessary. Move `apt` to use contain instead of anchors,
since it wasn't anchoring properly anyways. Update the tests to make
sure it can have settings and ppas depending on each other without
cycles.
This was a great idea but is pretty pointless. It's also not being used
by anything and not exposed as a switch on the main class so it would
almost never affect any behaviour.
Instead of having two additional parameters, `base_name` and
`setting_type` simply parse it from `title`.
We need to prefix most resources with `list-`, `conf-`, or `pref-` any
way to avoid duplicate resources so we might as well leverage that.
This allows you to work around duplicate resource issues when you have
settings of different types with the same name. When the files are built
it is path/${priority}${base_name}${extension}.
This is a 'base' type. It's a simple wrapper around a file which takes
`type`, `ensure`, `content`, `source` and `file_perms`. It is intended
for usage by `apt::conf`, `apt::source` and an upcoming `apt::pref`.
