ci: install GUI system libraries on intel-clean-room runners#1
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The intel-clean-room runners are sandboxed and lack X11 / GTK4 / FLTK dev headers. fltk-sys's bundled cfltk C++ build needs Xlib's `Window` type and Mesa GL headers at compile time, which surfaces as `'fl_xid' was not declared` and `'Window' does not name a type` errors. Add a pre-build step to clippy / test / contracts / coverage jobs that installs the package set already documented in README.md for FLTK and GTK4. fmt and deny don't compile, so they stay unchanged. Subsequent runs on the same runner are no-ops once apt has the packages. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
- Multiple jobs land on the same intel-clean-room host and contend on /var/lib/apt/lists/lock when they run apt-get update in parallel. Switch each install step to `apt-get -o DPkg::Lock::Timeout=300` so apt waits up to 5 minutes for the lock instead of failing. - Add assets/hero.svg + hero.png and reference it from README so the landing page actually shows what the five framework demos look like. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
DPkg::Lock::Timeout only covers /var/lib/dpkg/lock-frontend, not /var/lib/apt/lists/lock — and the latter is what concurrent intel-clean-room jobs collide on. Wrap apt-get update+install in a 30-attempt retry loop with 10s gaps so the second-arriving jobs wait out the first job's apt-get update instead of failing fast. Pull the install into .github/actions/setup-deps so each consumer job is one line (`uses: ./.github/actions/setup-deps`) instead of repeating the package list four times. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
The 8 intel-clean-room runners share /home/noah/data/actions-runner/_work/
on the host filesystem. When two jobs from the same workflow (e.g. clippy
and test, or contracts and deny) land on the same runner, they trample
each other's target/debug/deps/, producing rustc "couldn't create a temp
dir" errors and fltk-sys cmake "opening dependency file ... No such file
or directory" failures.
Pin each compile job's target directory to ${{ runner.temp }} (auto-
isolated per job, auto-cleaned by the runner) so concurrent jobs on the
same host stay out of each other's way. fmt and deny don't compile, so
they don't need the override.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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Summary
'fl_xid' was not declaredand'Window' does not name a typeapt-get installstep to clippy/test/contracts/coverage jobs that installs the package set documented in README.mdTest plan
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