Build static libraries for Android

Author: simolus3

.github/actions/android/action.yml

@@ -14,10 +14,10 @@ inputs:
 runs:
   using: "composite"
   steps:
-    - uses: actions/setup-java@v4
+    - uses: actions/setup-java@v5
       with:
         distribution: "temurin"
-        java-version: "17"
+        java-version: "25"
 
     - name: Validate Gradle wrapper
       uses: gradle/actions/wrapper-validation@v4
@@ -39,7 +39,7 @@ runs:
       if: ${{ inputs.sign-publication == '1' }}
       run: |
         cd android
-        ./gradlew build zipPublication -PgpgKey=${{ inputs.gpg-key }} -PgpgPassword=${{ inputs.gpg-password }}
+        ./gradlew build zipPublication  -PgpgKey=${{ inputs.gpg-key }} -PgpgPassword=${{ inputs.gpg-password }}
         ls -lh build/outputs/aar
         find build/repository
 
@@ -60,3 +60,19 @@ runs:
         compression-level: 0 # We're uploading a zip, no need to compress again
         path: android/build/distributions/powersync_android.zip
         if-no-files-found: error
+
+    - name: Copy static libraries
+      shell: bash
+      run: |
+        cp target/aarch64-linux-android/release/libpowersync.a libpowersync_aarch64.android.a
+        cp target/armv7-linux-androideabi/release/libpowersync.a libpowersync_armv7.android.a
+        cp target/i686-linux-android/release/libpowersync.a libpowersync_x86.android.a
+        cp target/x86_64-linux-android/release/libpowersync.a libpowersync_x64.android.a
+
+    - name: Upload static libraries
+      uses: actions/upload-artifact@v4
+      with:
+        name: android-static
+        retention-days: 14
+        path: |
+          *.a

.github/workflows/release.yml

@@ -179,18 +179,26 @@ jobs:
         with:
           submodules: true
 
-      - name: Download libs
+      - name: Download Linux libraries
         uses: actions/download-artifact@v5
         with:
           name: linux-library
-      - name: Download libs
+      - name: Download macOS libraries
         uses: actions/download-artifact@v5
         with:
           name: macos-library
-      - name: Download libs
+      - name: Download Windows libraries
+        uses: actions/download-artifact@v5
+        with:
+          name: windows-library
+      - name: Download Windows libraries
         uses: actions/download-artifact@v5
         with:
           name: windows-library
+      - name: Download static Android libraries
+        uses: actions/download-artifact@v5
+        with:
+          name: android-static
 
       - name: List libraries
         run: ls -al

android/build.gradle.kts

@@ -1,4 +1,3 @@
-import org.gradle.tooling.BuildException
 import java.util.Base64
 import java.util.Properties
 import kotlin.io.path.Path
@@ -54,30 +53,48 @@ fun ndkPath(): String {
     error("Expected an NDK 28 or later installation in $ndks")
 }
 
-val buildRust = tasks.register<Exec>("buildRust") {
+fun Exec.rustCompilation(project: String, output: String? = null) {
     group = "build"
     environment("ANDROID_NDK_HOME", ndkPath())
 
     workingDir("..")
-    commandLine(
-        "cargo",
-        "ndk",
-        "-t",
-        "armeabi-v7a",
-        "-t",
-        "arm64-v8a",
-        "-t",
-        "x86",
-        "-t",
-        "x86_64",
-        "-o",
-        "./android/build/intermediates/jniLibs",
-        "build",
-        "--release",
-        "-Zbuild-std",
-        "-p",
-        "powersync_loadable"
-    )
+    val args = buildList<String> {
+        this += listOf(
+            "cargo",
+            "ndk",
+            "-t",
+            "armeabi-v7a",
+            "-t",
+            "arm64-v8a",
+            "-t",
+            "x86",
+            "-t",
+            "x86_64",
+        )
+
+        output?.let {
+            this += "-o"
+            this += it
+        }
+
+        this += listOf(
+            "build",
+            "--release",
+            "-Zbuild-std",
+            "-p",
+            project,
+        )
+    }
+
+    commandLine(args)
+}
+
+val buildRust = tasks.register<Exec>("buildRust") {
+    rustCompilation("powersync_loadable", "./android/build/intermediates/jniLibs")
+}
+
+val buildRustStatic = tasks.register<Exec>("buildRustStatic") {
+    rustCompilation("powersync_static")
 }
 
 val prefabAar = tasks.register<Zip>("prefabAar") {
@@ -199,5 +216,5 @@ val zipPublication by tasks.registering(Zip::class) {
 }
 
 tasks.named("build") {
-    dependsOn(prefabAar)
+    dependsOn(prefabAar, buildRustStatic)
 }

android/gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.14.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.1.0-bin.zip
 networkTimeout=10000
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME