Build SoLoader with Gradle in GitHub Actions

.github/workflows/build.yml

@@ -1,14 +1,24 @@
 name: Build
-on: [push]
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+permissions:
+  contents: read
 
 jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - name: Buck build
-        uses: passy/run-buck@v0.1.0
+      - uses: actions/checkout@v4
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
         with:
-          commands: '/opt/android-sdk-linux/tools/bin/sdkmanager "build-tools;27.0.3" "platforms;android-26" > /dev/null; buck fetch //...; buck build :soloader'
-        env:
-          ANDROID_HOME: ${{ env.ANDROID_SDK_ROOT }}
+          distribution: zulu
+          java-version: '17'
+      - name: Set up Gradle
+        uses: gradle/actions/setup-gradle@v4
+      - name: Build and publish artifacts to Maven Local
+        run: ./gradlew :soloader:assembleDebug publishToMavenLocal -Dmaven.repo.local="$RUNNER_TEMP/soloader-m2"

.gitignore

@@ -2,6 +2,8 @@
 /.idea
 /buck-cache
 /buck-out
+/.gradle
+/**/build
 /.buckd
 PROJECTc
 *~

README.md

@@ -25,9 +25,21 @@ implementation 'com.facebook.soloader:soloader:0.13.0+'
 ```
 
 ## Building from source
-To build SoLoader from source you'll need [Buck](https://buckbuild.com/).
-Once you have Buck installed execute following commands from the project root
-directory:
+To build the Android library and its two Java dependencies with Gradle, install
+the Android SDK and JDK 17, then run:
+
+```shell
+./gradlew :soloader:assembleDebug :annotation:jar :nativeloader:jar
+```
+
+The AAR is written to `soloader/build/outputs/aar/`, and the annotation and
+nativeloader JARs to their respective `build/libs/` directories.
+Run `./gradlew publishToMavenLocal` to publish all three artifacts to your local
+Maven repository, using the version from the `artifacts/` configuration files.
+The published class files target Java 7, matching earlier SoLoader releases.
+
+The existing [Buck](https://buckbuild.com/) build is also available. Once you have
+Buck installed, run the following commands from the project root directory:
 ```shell
   buck fetch //...
   buck build :soloader

annotation/build.gradle

@@ -0,0 +1,32 @@
+plugins {
+    id 'java-library'
+    id 'maven-publish'
+}
+
+description = 'DoNotOptimize class'
+
+java {
+    toolchain.languageVersion = JavaLanguageVersion.of(17)
+    sourceCompatibility = JavaVersion.VERSION_1_7
+    targetCompatibility = JavaVersion.VERSION_1_7
+    withSourcesJar()
+    withJavadocJar()
+}
+
+sourceSets {
+    main {
+        java {
+            srcDirs = ['../java']
+            include 'com/facebook/soloader/DoNotOptimize.java'
+            include 'com/facebook/soloader/DoNotStripAny.java'
+        }
+    }
+}
+
+publishing {
+    publications {
+        annotation(MavenPublication) {
+            from components.java
+        }
+    }
+}

build.gradle

@@ -0,0 +1,47 @@
+plugins {
+    id 'com.android.library' version '9.2.1' apply false
+}
+
+def artifactVersions = ['ANNOTATION', 'NATIVELOADER', 'SOLOADER'].collect { artifact ->
+    def matcher = file("artifacts/${artifact}").text =~ /(?m)^VERSION\s*=\s*['"]([^'"]+)['"]/
+    if (!matcher.find()) {
+        throw new GradleException("Missing version in artifacts/${artifact}")
+    }
+    matcher.group(1)
+}
+if (artifactVersions.toSet().size() != 1) {
+    throw new GradleException("SoLoader artifact versions must match: ${artifactVersions}")
+}
+
+subprojects {
+    group = 'com.facebook.soloader'
+    version = artifactVersions[0]
+    def publishingProject = project
+
+    pluginManager.withPlugin('maven-publish') {
+        publishing.publications.withType(MavenPublication).configureEach {
+            pom {
+                name = 'SoLoader'
+                description = publishingProject.description
+                url = 'https://github.com/facebook/soloader'
+                licenses {
+                    license {
+                        name = 'Apache-2'
+                        url = 'https://github.com/facebook/soloader/blob/main/LICENSE'
+                    }
+                }
+                developers {
+                    developer {
+                        id = 'facebook'
+                        name = 'Facebook'
+                    }
+                }
+                scm {
+                    url = 'https://github.com/facebook/soloader.git'
+                    connection = 'scm:git:https://github.com/facebook/soloader.git'
+                    developerConnection = 'scm:git:git@github.com:facebook/soloader.git'
+                }
+            }
+        }
+    }
+}

gradle.properties

@@ -0,0 +1,3 @@
+# SoLoader has Java sources only; disable AGP's built-in Kotlin support so its
+# published POM does not acquire an unnecessary Kotlin standard-library dependency.
+android.builtInKotlin=false

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.4.1-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists