Is there a way to opt out of generating pex files during development* when trying to run scripts / modules? Unfortunately I have some large dependencies like scipy, etc, and whenever I make a slight change to a first party library (like add a print) it takes a really long time for

./pants run foo:cli

to run. Having

Building foo/cli.pex with 20 requirements:...

take 20 seconds really kills being able to establish a fast feedback loop

are you running a

pex_binary

target, or a

python_source

target? as of relatively recently, those have different implementations.

I'm targeting a

pex_binary

sorry for the trouble. running a

pex_binary

used to use the same optimization, so it wouldn’t have mattered which you ran. but there are technically some potential behavior differences in this optimization, so we decided to have running a

pex_binary

always fully create the PEX (like

package

would) before `run`ning it

Also, if/when you DO need a PEX binary, the default layout of zipapp usually causes these long building times for substantial libraries. Changing to one of the other modes is ideal

That's good to know. I had tried messing around with

execution_mode

but not

layout