Ergonomic, hermetic, user-friendly software build system for Python, Go, Java, Kotlin, Protobuf, Scala, Shell. Pants lets you fearlessly scale up your codebase!

Pants

Hi there !
I've opened a PR on github about non strict timestamps in zips (<https://github.com/pantsbuild/pants/pull/10032>). It shows that this is a new parameter in python 3.8, then <@UB2J9BQA0> suggests to try another method. My second guess about this would be to force pants incremental compilation to update modification date to `now()` even in case of unmodified jar.
Do you have any clue for me ?

hey <@U015ABFRS90>: responded there, but i suspect that it’s related to the underlying scala code which writes those

Hello, I've done some futher tests, and it appear that `org.pantsbuild.zinc.compiler.OutputUtils` may not be responsible of mtime = 0, since creating a `JarOutputStream` and closing it just after creates a jar with correct stat :
```$ stat foo.jar 
  File: foo.jar
  Size: 22        	Blocks: 8          IO Block: 4096   regular file
Device: fe06h/65030d	Inode: 2384464     Links: 1
Access: (0644/-rw-r--r--)  Uid: ( 1000/mgrenonville)   Gid: ( 1000/mgrenonville)
Access: 2020-06-22 12:01:24.880808759 +0200
Modify: 2020-06-22 12:01:28.464878220 +0200
Change: 2020-06-22 12:01:28.464878220 +0200
 Birth: -```
