Expose option for configuring user-debug or eng builds

[richnetdesign]

For developers or recovery purposes, would be helpful to allow configuring options in aosp-build to make eng or user-debug builds.

This is how it can be done manually
TARGET_BUILD_TYPE=debug breakfast sargo eng
TARGET_BUILD_TYPE=debug brunch sargo eng

Discussed here
https://source.android.com/setup/build/building

[ypid]

would be helpful to allow configuring options in aosp-build to make eng or user-debug builds

Yes, that would be helpful. I guess for any serious person building and maintaining a custom ROM, a second phone running user-debug or so is basic. I currently only partly have a second phone that is the same as my main one laying around, but I definitional plan to get one again for the Android 11 update.

So, feel free to implement this.

[ypid]

Currently, this can only be configured using:

aosp-build/config/config.yml

Line 4 in a562660

variant: user

I am not sure what the best way to expose this is.

Pro config.yml:

• variant will change the build output so it should be contained in the config.

Pro for make parameter:

• Simpler to make a user debug build.

For the time being, I would propose to leave it as it is unless more compelling arguments for exposing it as make parameter are found.