Refactor the progress printer creation to the caller-side of the
controller api. Then, instead of passing around status channels (and
progressMode strings), we can simply pass around the higher level
interface progress.Writer.
This has a couple of benefits:
- A simplified interface to the controller
- Allows us to correctly extract warnings out of the controller, so that
they can be displayed correctly from the client side.
Some extra work is required to make sure that we can pass a
progress.Printer into the debug monitor. If we want to keep it
persistent, then we need a way to temporarily suspend output from it,
otherwise it will continue printing as the monitor is prompting for
input from the user, and forwarding output from debug containers.
To handle this, we add two methods to the printer, `Pause` and
`Unpause`. `Pause` acts similarly to `Wait`, closing the printer, and
cleanly shutting down the display - however, the printer does not
terminate, and can later be resumed by a call to `Unpause`. This
provides a neater interface to the caller, instead of needing to
continually reconstruct printers for every single time we want to
produce progress output.
Signed-off-by: Justin Chadwell <me@jedevc.com>
Now clients can access the result of the solve, specifically the image
id output. This is a useful refactor, as well as being required if we
want to allow bake to invoke through the controller api.
This also allows us to remove the quiet option from the API, since we
can compute the required progress type outside of the controller, and
can print the image id from the result of the solve.
As a follow-up, we should also be able to remove the image id file
output from the controller api, now that the client has access to it.
Signed-off-by: Justin Chadwell <me@jedevc.com>
