ci: add reusable headless Docker build environment - #1475
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Add a Maven profile activated on linux/aarch64 that sets osgi.os=linux, osgi.ws=gtk, osgi.arch=aarch64. Without it, Tycho falls back to the pom's default win32 target environment on arm64 Linux and builds an unlaunchable test runtime (NoClassDefFoundError: org.eclipse.swt.SWTError, exit code 13), so SWT/UI tests cannot run in an arm64 container. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Add docker/Dockerfile (Maven + Temurin 21 base plus Xvfb and the GTK/X11 libraries Eclipse SWT and AWT require) and a README documenting how to run the full verify suite headlessly in a container. Runs --init so xvfb-run is not PID 1, and mounts a persistent .m2 volume to cache p2/Maven downloads between runs. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Adds a reusable Docker image for building and testing DSL DevKit headlessly in a Linux container, plus the Tycho target-environment profile required on Linux ARM64.
This supersedes #1501: the first commit contains the ARM64 profile from that PR, and the second adds the tested container environment and documentation.
What it adds
64bit_linux_aarch64Maven profile withosgi.os=linux,osgi.ws=gtk, andosgi.arch=aarch64.MAVEN_IMAGEbuild argument, replacing the previous copiedDockerfile.localworkaround.Local verification
All Maven invocations used
-T 3C.Linux AMD64 on Windows
<testcase>elements.Linux ARM64 on Windows
--platform linux/arm64under Docker Desktop emulation.64bit_linux_aarch64and Tycho launched the Eclipse test runtime aslinux/gtk/aarch64.-Dtest.timeout=7200. Native ARM64 should be substantially faster.The exact final AMD64 and ARM64 images also launched an SWT
DisplayandShellunder Xvfb.Image cleanup
The original Dockerfile explicitly requested 20 packages, including redundant transitive dependencies and unused GTK4/ALSA fallback packages. The final image explicitly installs four:
libgtk-3-0t64librsvg2-commonlibxtst6xvfbCompared with the original image, this reduces the AMD64 image by 13.35 MiB and the ARM64 image by 14.70 MiB while retaining the required SWT/GTK behavior.