Legacy Interop

For some past versions of ldmx-sw, we need to modify the code slightly in order for it to be able to be built by the newer containers. For this reason, we have a set of patch files (the ci/interop directory).

The patch files here are intended to patch older versions of ldmx-sw so that they can be built with newer images that have newer dependencies and compilers.

They are git applyed within ldmx-sw and are applied before the configuration (cmake) step so that they can modify the build configuration files if need be.

For creating a patch files, there is a small script in ci/interop that runs the appropriate git commands for you.

# inside of the ldmx-sw you have patched
path/to/dev-build-context/ci/interop/save-patch

Many versions of ldmx-sw require the same patch and so instead of copying the same file, I have just symlinked a specific version's patch file to the previous version so that developers only need to update a patch file for the version where the (now breaking) change was introduced.