WinPB: Pin Cygwin Packages

[steelhead31]

Fixes #4068

Due to issues with the most recent version of Cygwin, being unable to build JDK11, due to an upstream JDK bug, we need to temporarily pin the cygwin installation to install specific versions of packages.

This bug : https://bugs.openjdk.org/browse/JDK-8357657?focusedId=14792554&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel

Should be fixed in time for January 2026 release, once this bug is fixed and tested, we can revert this change, and test with the current package versions again.

Have built all JDK versions locally on vms using this version of cygwin...

Checklist

• commit message has one of the standard prefixes
• playbook changes run through VPC or QPC (if you have access)

❌ JDK8 VPC : FAIL KNOWN ISSUE
✔️ : JDK11 VPC : https://ci.adoptium.net/job/VagrantPlaybookCheck/OS=Win2022,label=vagrant/2181/console
✔️ JDK17 VPC : https://ci.adoptium.net/job/VagrantPlaybookCheck/2187/
✔️ JDK21 VPC : https://ci.adoptium.net/job/VagrantPlaybookCheck/OS=Win2022,label=vagrant/2185/

[sxa]

Where did that URL come from? Using a non-official repository for this makes me somewhat nervous

[steelhead31]

Where did that URL come from? Using a non-official repository for this makes me somewhat nervous

Its this.. http://www.crouchingtigerhiddenfruitbat.org/Cygwin/index.html , its pretty official and hosted on behalf of cygwin by one of its maintainers. Its known as the cygwin time machine... http://www.crouchingtigerhiddenfruitbat.org/Cygwin/timemachine.html and is pretty much a snapshot of the mirrors at various points in time.

Despite its rather interesting domain name :)

[sxa]

The http in there (as opposed to https) also makes me a little nervous. I'd suggest (ok I've already suggested it to you but I'm writing it down here!) that we consider looking at a cached bundle that we could store in somewhere like ci.adoptium.net/userContent (Or /Vendor_Files but since this is likely temporary that may not be necessary)

[steelhead31]

Amending this to PR use a local cache of the required version of cygwin and its packages... returning to draft.

[steelhead31]

Tested locally and builds, 11,17 & 21 OK.. will run through VPC next.. JDK8 doesnt build due to issues with VS2022.

[sxa]

Approving on the basis that
a) This is intended as a temporary measure until this is resolved upstream (Alternate option: We float a patch til then)
b) The JDK8 issue is unrelated to this PR and is a separate known issue

Thanks for tracking this down and resolving.

[karianna]

@steelhead31 you happy to merge now?