The MG4 head unit's platform certificate (c8a2e9bc…192ab8, per
tools/README.md) is the public AOSP test key. build-car fetches that key
into the gitignored tools/ directory from a pinned android-9.0.0_r1 tag,
builds assembleUnstableDebug, zipaligns and signs it, and refuses to
finish unless both the key's certificate and the resulting signer match
the expected SHA-256. Output lands in build/car/ with a .sha256 sidecar.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Provides JDK 21 and an Android SDK (platforms 36/36.1, build-tools
36.0.0) via `nix develop`. Points AGP at the SDK's aapt2 and Gradle at
the Nix JDK, since the binaries they would otherwise download do not
run on NixOS.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
nilsandClaude Opus 5.5