WIP: Trial using `context.bat` instead of `context.sh` on Windows in docker

[sxa]

This is very much a 'work-in-progress' / feasibility study with the intention of diagnosing the problem described in https://github.com/adoptium/infrastructure/issues/3714. The PR is not ready for review (since it's mostly debug information and experiments) but I'm creating it in the spirit of openness to go alongside the issue :-)

I have attempted to put comments against all of the context.sh operations which are performed inside the containers during a docker build to identify which ones are causing problems.

I have converted some of them to context.bat based on some of the trial runs (Noting that this cannot be a final solution as-is as it won't work on non-Windows systems unless an if windows block is used to switch between them).

The four-digit numbers in the battable lines are the line number in the openjdk_build_pipeline.groovy and the windbld numbers are the job runs of windbld which showed the problem, so are instances where we have definitely hit an issue with those.

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[sxa]

run tests

[sxa]

@andrew-m-leonard FYI

This is really horrible, but it's to resolve issues with using context.sh in a docker container. I've trapped the situations that are occurring more often - I may need to do more but it's been fairly reliable since I got this far.

LMK what you think of this (Mostly the if windows && docker use context.bat else context.sh bits) - I'd love to hear other suggestions - would it work as a wrapper function for example?

The other changes in this WIP are pretty much just debug or downloading a workspace tarball to avoid me re-running the build each time to see how well it's working (about 7 minutes vs over 2 hours) so you can ignore those bits - obviously they won't be there if this gets to a stage where we're comfortable taking it out of draft.

[sxa]

run tests

[eclipse-temurin-bot]

 PR TESTER RESULT 

✅ All pipelines passed! ✅

[sxa]

Noting that while this branch is still being used for testing, it will likely get merged into a second PR to cover the refactoring described in https://github.com/adoptium/infrastructure/issues/3709#issuecomment-2333827072