This fixes a possible race where messages printed directly after calls
to NewPrinter may appear before the printer starts. With this change, we
delay all of the logs until after.
Signed-off-by: Justin Chadwell <me@jedevc.com>
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>
The NewPrinter function is mostly borrowed from buildkit. However, at
some point, it seems that the implementations drifted.
This patch updates buildx to be more similar in behavior to it's
buildkit counterpart, specifically, it will explicitly fail if a TTY
output is requested using "--progress=tty", but the output is not
available.
To gracefully fallback to plain progress in this scenario,
"--progress=plain" is required.
Signed-off-by: Justin Chadwell <me@jedevc.com>
CrazyMax