feat(build): set up two-module structure for framework/batteries split

eppo-android-common/build.gradle

@@ -0,0 +1,153 @@
+plugins {
+    id 'com.android.library'
+    id 'maven-publish'
+    id "com.vanniktech.maven.publish" version "0.32.0"
+    id 'signing'
+    id "com.diffplug.spotless" version "8.0.0"
+}
+
+group = "cloud.eppo"
+version = "4.12.1"
+
+android {
+    buildFeatures.buildConfig false
+    compileSdk 34
+
+    defaultConfig {
+        // Use a different namespace to avoid conflicts with the framework module
+        // The code still uses cloud.eppo.android packages, but the Android namespace is different
+        namespace "cloud.eppo.android.common"
+        minSdk 26
+        targetSdk 34
+        consumerProguardFiles "consumer-rules.pro"
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+            matchingFallbacks = ['release']
+        }
+
+        debug {
+            minifyEnabled false
+            matchingFallbacks = ['debug']
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+    testOptions {
+        unitTests.returnDefaultValues = true
+    }
+    packagingOptions {
+        resources {
+            excludes += "META-INF/**"
+        }
+    }
+}
+
+dependencies {
+    // API dependency on framework (for compilation)
+    api project(':eppo')
+
+    // These will be added in PR4 when we add default implementations
+    // implementation 'cloud.eppo:eppo-sdk-common:4.0.0-SNAPSHOT'
+    // implementation "com.squareup.okhttp3:okhttp:4.12.0"
+    // implementation "com.fasterxml.jackson.core:jackson-databind:2.19.1"
+}
+
+spotless {
+    format 'misc', {
+        target '*.gradle', '.gitattributes', '.gitignore'
+
+        trimTrailingWhitespace()
+        leadingTabsToSpaces(2)
+        endWithNewline()
+    }
+    java {
+        target '**/*.java'
+
+        googleJavaFormat()
+        formatAnnotations()
+    }
+}
+
+signing {
+    if (System.getenv("GPG_PRIVATE_KEY") && System.getenv("GPG_PASSPHRASE")) {
+        // Use in-memory keys for CI builds
+        useInMemoryPgpKeys(System.env.GPG_PRIVATE_KEY, System.env.GPG_PASSPHRASE)
+    }
+
+    sign publishing.publications // Sign all Maven publications
+}
+
+// Make sure signing tasks only run if configured correctly
+tasks.withType(Sign) {
+    onlyIf {
+        (System.getenv("GPG_PRIVATE_KEY") && System.getenv("GPG_PASSPHRASE")) ||
+                (project.hasProperty('signing.keyId') &&
+                        project.hasProperty('signing.password') &&
+                        project.hasProperty('signing.secretKeyRingFile'))
+    }
+}
+
+// For backward compatibility, keep same artifact ID
+mavenPublishing {
+    publishToMavenCentral(com.vanniktech.maven.publish.SonatypeHost.CENTRAL_PORTAL)
+    signAllPublications()
+    coordinates("cloud.eppo", "android-sdk", project.version)
+
+    pom {
+        name = 'Eppo Android'
+        description = 'Eppo Android SDK - batteries-included with OkHttp and Jackson'
+        url = 'https://github.com/Eppo-exp/android-sdk'
+        licenses {
+            license {
+                name = 'MIT License'
+                url = 'http://www.opensource.org/licenses/mit-license.php'
+            }
+        }
+        developers {
+            developer {
+                name = 'Eppo'
+                email = 'https://www.geteppo.com'
+            }
+        }
+        scm {
+            connection = 'scm:git:git://github.com/Eppo-exp/android-sdk.git'
+            developerConnection = 'scm:git:ssh://github.com/Eppo-exp/android-sdk.git'
+            url = 'https://github.com/Eppo-exp/android-sdk/tree/main'
+        }
+    }
+}
+
+// Custom task to ensure we can conditionally publish either a release or snapshot artifact
+// based on a command line switch. See github workflow files for more details on usage.
+task checkVersion {
+    doLast {
+        if (!project.hasProperty('release') && !project.hasProperty('snapshot')) {
+            throw new GradleException("You must specify either -Prelease or -Psnapshot")
+        }
+        if (project.hasProperty('release') && project.version.endsWith('SNAPSHOT')) {
+            throw new GradleException("You cannot specify -Prelease with a SNAPSHOT version")
+        }
+        if (project.hasProperty('snapshot') && !project.version.endsWith('SNAPSHOT')) {
+            throw new GradleException("You cannot specify -Psnapshot with a non-SNAPSHOT version")
+        }
+        project.ext.shouldPublish = true
+    }
+}
+
+// Ensure checkVersion runs before publishing
+tasks.named('publish').configure {
+    dependsOn checkVersion
+}
+
+// Conditionally enable or disable publishing tasks
+tasks.withType(PublishToMavenRepository) {
+    onlyIf {
+        project.ext.has('shouldPublish') && project.ext.shouldPublish
+    }
+}

eppo-android-common/consumer-rules.pro

@@ -0,0 +1,2 @@
+# Consumer ProGuard rules for eppo-android-common (batteries-included)
+# These rules are included in apps that use this library

eppo-android-common/src/main/AndroidManifest.xml

@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+</manifest>

eppo/build.gradle

@@ -126,11 +126,11 @@ tasks.withType(Sign) {
 mavenPublishing {
     publishToMavenCentral(com.vanniktech.maven.publish.SonatypeHost.CENTRAL_PORTAL)
     signAllPublications()
-    coordinates("cloud.eppo", "android-sdk", project.version)
+    coordinates("cloud.eppo", "android-sdk-framework", project.version)
 
     pom {
-        name = 'Eppo Android'
-        description = 'Eppo Android SDK'
+        name = 'Eppo Android Framework'
+        description = 'Eppo Android SDK Framework - requires HTTP and parser implementations'
         url = 'https://github.com/Eppo-exp/android-sdk'
         licenses {
             license {

example/build.gradle

@@ -58,7 +58,7 @@ dependencies {
     implementation 'androidx.appcompat:appcompat:1.7.1'
     implementation 'com.google.android.material:material:1.12.0'
     implementation 'androidx.constraintlayout:constraintlayout:2.2.1'
-    implementation project(path: ':eppo')
+    implementation project(path: ':eppo-android-common')
     testImplementation 'junit:junit:4.13.2'
     androidTestImplementation 'androidx.test.ext:junit:1.2.1'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.6.1'

settings.gradle

@@ -19,3 +19,4 @@ dependencyResolutionManagement {
 rootProject.name = "Eppo SDK"
 include ':example'
 include ':eppo'
+include ':eppo-android-common'