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CI: stop rebuilding the framework at every run; a build cache and ccache (#74) #76

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twisla merged 3 commits from ci-speed into main 2026-10-07 02:08:50 +00:00
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twislaandClaude Opus 5.5 828f7ce821 R1: the CI timings measured on the runner
CI / build (pull_request) Successful in 1m17s
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Site / build (pull_request) Successful in 8s
Details 
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EhqxQ49eCju4CzKYNjZzwT
 2026-10-07 02:22:15 +02:00
twislaandClaude Opus 5.5 ca5874fe70 CI: say how to start the caches again from nothing
Site / build (pull_request) Successful in 9s
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CI / build (pull_request) Successful in 1m6s
Details 
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EhqxQ49eCju4CzKYNjZzwT
 2026-10-07 02:18:05 +02:00
twislaandClaude Opus 5.5 07ac7ba457 CI: stop rebuilding the framework at every run; a build cache, ccache, and the version out of the compiler flags (#74)
CI / build (pull_request) Successful in 7m11s
Details
Site / build (pull_request) Successful in 9s
Details 
A pull request's firmware step took 358 s: 260 of them rebuilding the
framework that was already in the volume, because the platform decides by
sdkconfig.defaults in the project folder, which is generated and not in git,
so no fresh checkout had it. It is now kept in the volume, inside the
libraries it describes, and copied into the checkout; the platform still
checks its hash against platformio.ini.

The version was a -D on every command line: each commit recompiled
everything, and no cache could help. scripts/version.py now writes one
generated header, read by one file.

PlatformIO's build cache in the volume for pull requests' firmware, ccache
for the host tests (built for coverage, which the build cache can't keep),
the tools in a venv in the volume, and a tag builds its firmware once.
A release still compiles its own sources from nothing.

Measured on fresh copies of the tree: the firmware step 358 s to 27 s (a new
version and one changed file), tests and coverage 49 s to 33 s, a local
rebuild with nothing changed 77 s to 13 s.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EhqxQ49eCju4CzKYNjZzwT
 2026-10-07 02:10:34 +02:00