Engine

Setup

Prerequisites

JDK 17.
Android SDK with ANDROID_HOME set to its root. Extension modules invoke d8 from $ANDROID_HOME/build-tools/*/ and link against the latest platforms/android-*/android.jar.
The reseam CLI, built from the Reseam repo or installed from a release.
Git.

First build

Generate a bundle signing key the first time:

reseam bundle keygen --out bundle-signing.key

Keep it private and store it outside the repository. The corresponding public key is embedded in patches.json so clients can verify the bundles you publish.

Build:

export RESEAM_BUNDLE_KEY=$PWD/bundle-signing.key
./gradlew bundle

Output: build/bundle/<name>.reseam.

Inspect and apply to a local APK to check:

reseam bundle list build/bundle/<name>.reseam
reseam patch target.apk \
  --bundle build/bundle/<name>.reseam \
  --output patched.apk

For the project layout itself, see Bundles. For the full release flow, see Publishing.

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