PSA: https://rbcommons.com/s/twitter/r/3071/ changes how we handle the version-request flags,

-v

,

-V

,

--version

and

--pants-version

. The first three now no longer take an optional argument, and display the current version.

--pants-version

now requires an argument, and pants verifies that it's running against that version. This also documents the pants_version key in pants.ini, which is used by scripts etc.