GEF Classic 3.26 Release for Eclipse 2025-12

[azoitl]

This issue is used to track and coordinate the work for the GEF Classic 3.26.0 release to be contributed to the Eclipse 2025-12 release train. It shall serve as checklist as well as template for the upcoming release.

• Create 3.26 Milestone
• Update version number and target platforms:
  • Update the version number of all features to 3.26.0
  • Bump maintenance version number of all plugins
  • Update the target platform for the API baseline to GEF Classic 3.25.0
  • Update the pom file target platform checking to GEF Classic 3.25.0
  • Update the development target platform to Eclipse 2025-12
• 06.10.2025: Release 3.26.0 M1 for 2025-12 M1
  • create release record
• 27.10.2025: Release 3.26.0 M2 for 2025-12 M2
• 11.11.2025: Release 3.26.0 M3 for 2025-12 M3
• 24.11.2025: Release 3.26.0 RC1 for 2025-12 RC1
• 01.12.2025: Release 3.26.0 for 2025-12 RC2
  • create R3_26_maintenance branch
• 10.12.2025: 2025-12 Release
  • tag release commit and mark it as release in Github, create release notes

[azoitl]

Master branch is open and ready for 3.26 contributions.

[ptziegler]

@azoitl What should we do about #805? I think it would be beneficial to have this included for the M1. I've already prepared a fix for the Zest tests, but don't have a solution for the Draw2D failures. Here I'm tempted to revert the enablement of the "advanced mode" in the FigureUtilities class and track that issue separately.

[azoitl]

@ptziegler the more we have in M1 the better. However the last weeks I didn't find enough time to full go through all the changes. So I would rely on your assessment. But splitting sounds like a good approach.

[ptziegler]

Then let's merge everything. I think especially with such a delicate feature, early feedback will be invaluable. And if there are issues, people can always opt-out and get the original functionality.

[azoitl]

Could you do the M1 later today?

[ptziegler]

Sure. I'll trigger the job once everything is merged.

[ptziegler]

M1 has been contributed:

https://download.eclipse.org/tools/gef/classic/milestone/S202510061831
eclipse-simrel/simrel.build@9ff79e8

Release record:
https://projects.eclipse.org/projects/tools.gef/releases/gef-classic-3.26.0

[ptziegler]

Respin of the M1:
https://download.eclipse.org/tools/gef/classic/milestone/S202510081740
eclipse-simrel/simrel.build@358fee9

[azoitl]

M2 has been contributed:

• https://download.eclipse.org/tools/gef/classic/milestone/S202510280640
• eclipse-simrel/simrel.build@c4118f0

[ptziegler]

M2a has been contributed, containing the fix for #831:
https://download.eclipse.org/tools/gef/classic/milestone/S202510291753
eclipse-simrel/simrel.build@5e8a801