osc usecase for reproducible builds #1922
Description
Is your feature request related to a problem? Please describe.
This is meant to describe my use-case of osc for my tooling to check reproducible builds.
My code is at
https://github.com/bmwiedemann/reproducibleopensuse/tree/devel
a) I get mtimes from .osc/_files for non-git builds, because those mtimes matter in the creation of .src.rpm cpio metadata.
b) I use the mtime of .osc/_files as reference for Makefiles to decide when to rebuild a package, so that I can run osc up on a whole project but only rebuild the parts that got updated.
c) for _multibuild packages, I need to figure out, which of them to rebuild. I use osc r to check for excluded/disabled/unresolvable builds.
I use .osc/_project but fallback to ../.osc/_project for bookkeeping.
I try to extract version info from .spec or .build.log
I use osc build --preload and --offline to run two parallel builds with identical versions of everything, also with --alternative-project or -p DIR to add local versions with toolchain patches.