Remove interactivity from CLI, delete by default

[davidmorgan]

build_runner has been around for quite some time now :) ... based on how people use it, I propose to:

• remove interactivity: currently, it can prompt before deleting pre-existing outputs or a pre-existing merged output folder
• make "do delete outputs", -d, the default option
• possibly also make "do delete outputs" the only option

roughly, the justification is that these are all things you can easily achieve yourself in a wrapper script / tool / build, and it's better if build_runner just does the simplest and most useful thing always.

These would technically be breaking changes, but I'd be surprised if they cause trouble for 99% of people.

Please comment if you need/like the current "prompt by default" behaviour :)

[gmpassos]

I agree with the proposal. However, I suggest also allowing the previous parameters in the CLI to avoid introducing any breaking changes in many CI scripts in the wild.

[davidmorgan]

I agree with the proposal. However, I suggest also allowing the previous parameters in the CLI to avoid introducing any breaking changes in many CI scripts in the wild.

Yes indeed, -d would I guess first do nothing, then maybe issue a warning for a while before eventually being removed.