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build(android): add a side-by-side release build for validating R8

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R8 has broken release APKs here before by stripping the JNI-loaded player
and security classes, and the only way to reproduce that was to build with
the real signing key and clobber the install you actually use.

`./scripts/build-and-deploy.sh release --device --debug` now builds a
fully minified release APK — exactly what ships — into the .debug
applicationId slot, signed with the local debug keystore:

  release            com.dtourolle.jellytau        0.5.5
  release --debug    com.dtourolle.jellytau.debug  0.5.5-debug-release
  debug              com.dtourolle.jellytau.debug  0.5.5-debug

It shares the applicationId *and* the signature with the plain debug
build, so the two replace each other cleanly rather than colliding, and
the versionName suffix says which is currently installed. No real key is
needed, so the side-by-side path deliberately skips
write-keystore-properties.sh.

The flag reaches Gradle as JT_SIDE_BY_SIDE=1. CI never sets it, and the
release manifest merges byte-identical without it — verified both ways
through processUniversalReleaseMainManifest.

deploy-android.sh and build-and-deploy.sh learned the flag too, since the
APK path is unchanged but the package to launch is not.
This commit is contained in:
dtourolle
2026-08-16 10:42:59 +02:00
parent 886cbcb29a
commit 521acc75fd
6 changed files with 106 additions and 21 deletions
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CLAUDE.md
+6 -3
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@@ -34,9 +34,12 @@ bun run android:logs # logcat
The **debug** build type carries `applicationIdSuffix ".debug"`, so
`com.dtourolle.jellytau.debug` ("JellyTau Debug") installs *alongside* a release
build with its own data dir — never uninstall the release app to test a debug
one. Only the applicationId is suffixed; Kotlin classes stay in the `namespace`
package `com.dtourolle.jellytau`, so JNI lookups and R8 keep rules are
unaffected. See [README_ANDROID_BUILD.md](src-tauri/android/README_ANDROID_BUILD.md).
one. `./scripts/build-and-deploy.sh release --device --debug` puts an
R8-minified *release* build in that same slot, signed with the local debug
keystore, for validating minification without the real key. Only the
applicationId is suffixed; Kotlin classes stay in the `namespace` package
`com.dtourolle.jellytau`, so JNI lookups and R8 keep rules are unaffected. See
[README_ANDROID_BUILD.md](src-tauri/android/README_ANDROID_BUILD.md).
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