[Buildbot] Add script for setting up environment for debug/reproduction

[Kewen12]

This PR provides a script to help developers quickly set up a local environment for debugging or reproducing issues surfaced by our upstream buildbots. Updated readme for detailed instructions.

This script:

• Pulls the Rock manylinux Dockerfile and the necessary files for building the base image;
• Builds the same images that our buildbot run, based on the base image;
• Creates and run the container;
• Clean up the container and images;
• Supports flexible use cases.

Tested locally.

[jplehr]

Thanks for putting this together!

I think it would be great if a user could point to a local LLVM tree and then have that mounted into the container as a volume mount. This reduces the need for re-cloning.

The other question that I had: Do these docker commands that the script uses require a certain docker version to be available?

[Kewen12]

Thanks for putting this together!

I think it would be great if a user could point to a local LLVM tree and then have that mounted into the container as a volume mount. This reduces the need for re-cloning.

Good idea! I added a new flag --llvm-src to support the mounting.

The other question that I had: Do these docker commands that the script uses require a certain docker version to be available?

The docker cmds and options are fundamental which should be available for the versions widely used. So I think we don't have to enforce the version here.

[jplehr]

Should we check if the docker exists first?
This fails when the container is still running, right?

[Kewen12]

The revision has the following changes to address comment feedback:

• Added --rebuild-base to force rebuilding base image;
• Added logic to generate unique container name by default;
• Updated README for UID/GID: no UID/GID remapping, bind mount preserves host ownership;
• Added --clean-all option to clean container and image;
• Renamed functions and variables;
• Removed comments.