Hi, I'm on pants 1.16. Is there a way to specify default options on the command line?

./pants --jvm-options="-Xmx1g" options | grep shader.jvm_options
shader.jvm_options = ['-Xmx256m', '-Xmx3g', '-XX:+UseParallelGC'] (from CONFIG_DEFAULT in pants.ini)

https://www.pantsbuild.org/options.html#command-line-flags mentions its possible for global options, but I guess not default options?

what is your goal here? what default options would you want to specify on the command line?

I want to set every scope's

jvm_options

to a specific value. I know i can do it if i specify the scope

./pants --shader-jvm-options="-Xmx1g" options | grep shader.jvm_options
shader.jvm_options = ['-Xmx256m', '-Xmx3g', '-XX:+UseParallelGC', '-Xmx1g'] (from FLAG in pants.ini)

pants.ini has a "[DEFAULT]" section that can be useful for that case

hm, yes, i believe this is only doable in a config file right now, but there’s no reason that needs to be the case. since we can clearly tell that CONFIG_DEFAULT is being used i think our options system should be able to support this if it’s desired

yep, i have stuff in there, but for something like travis, i wanna override it

you could potentially add another config file

i see you guys dynamically generate the travis.yml file 🙂 , was hoping to avoid that

oooh, i see what you mean.

i see you guys dynamically generate the travis.yml file

This is only for deduplication because our CI is really complex. We use

pants.travis-ci.ini

to handle different Pants config in CI

ahh, good point. yeah i guess i can add in another

pants-travis.ini

with my overrides

the "[default]" section concept is implemented entirely in the ini config parser, unfortunately. and using it is really only needed for things like jvm_options which were spotily converted to subsystems a while back.

Hmm I'm noticing some weird behavior. For a few flags,

pants-traivs.ini

properly overrides the value, in other cases it doesnt

./pants --pants-config-files=pants-travis.ini options | grep jvm_options

analysis.zinc.jvm_options = ['-Xmx2g'] (from CONFIG_DEFAULT in pants-travis.ini)
binary.dup.jvm_options = ['-Xmx4g'] (from CONFIG in pants.ini, in pants.ini)

I have

jvm_options: ['-Xmx4g']

in my

pants.ini

and then exact same line with 2g in my

pants-travis.ini

. Seems like it takes affect for one option but not the other?

the "default" only applies where something is not defined

ah i see, i have

binary.dup.skip: True

in pants.ini