ADFA-5153: Decode Content rows against the shared Brotli dictionary

app/build.gradle.kts

@@ -3,6 +3,7 @@
 import com.itsaky.androidide.build.config.BuildConfig
 import com.itsaky.androidide.desugaring.utils.JavaIOReplacements.applyJavaIOReplacements
 import com.itsaky.androidide.plugins.AndroidIDEAssetsPlugin
+import org.gradle.nativeplatform.platform.internal.DefaultNativePlatform
 import org.json.JSONObject
 import java.io.BufferedOutputStream
 import java.io.ByteArrayInputStream
@@ -214,6 +215,55 @@ configurations.configureEach {
 	exclude(group = "com.google.auto.value", module = "auto-value")
 }
 
+// brotli4j ships its native decoder as a per-OS/arch artifact, so the JVM unit tests need the one
+// matching whoever is building. Mirrors build-logic/plugins' dispatch, but degrades to null on an
+// unrecognized host instead of throwing: this runs at configuration time, so throwing would fail
+// every task in the build -- including :app:assembleV8Debug, which needs no desktop native at all
+// -- rather than only the JVM unit-test tasks that actually consume this dependency.
+fun brotli4jNativeForHost(): Provider<MinimalExternalModuleDependency>? {
+	val arch = DefaultNativePlatform.getCurrentArchitecture()
+	val os = DefaultNativePlatform.getCurrentOperatingSystem()
+	val native =
+		when {
+			os.isMacOsX -> {
+				when {
+					arch.isArm64 -> libs.brotli4j.osx.aarch64
+					arch.isAmd64 -> libs.brotli4j.osx.x64
+					else -> null
+				}
+			}
+
+			os.isWindows -> {
+				when {
+					arch.isArm64 -> libs.brotli4j.windows.aarch64
+					arch.isAmd64 -> libs.brotli4j.windows.x64
+					else -> null
+				}
+			}
+
+			os.isLinux -> {
+				when {
+					arch.isArm64 -> libs.brotli4j.linux.aarch64
+					arch.isAmd64 -> libs.brotli4j.linux.x64
+					else -> null
+				}
+			}
+
+			else -> {
+				null
+			}
+		}
+	if (native == null) {
+		logger.warn(
+			"brotli4j: no native decoder for {}/{} -- brotli4j-backed JVM unit tests " +
+				"(e.g. BrotliDictionaryDecodeTest) will fail with UnsatisfiedLinkError on this host.",
+			os,
+			arch,
+		)
+	}
+	return native
+}
+
 dependencies {
 	debugImplementation(libs.common.leakcanary)
 
@@ -353,6 +403,13 @@ dependencies {
 
 	// brotli4j
 	implementation(libs.brotli4j)
+	// JVM unit tests (e.g. BrotliDictionaryDecodeTest) run brotli4j's real native decoder, not an
+	// Android target -- without a desktop native on the test classpath, Brotli4jLoader has nothing
+	// to load and every such test fails with UnsatisfiedLinkError. Pick the native for whoever is
+	// building, so the suite runs off a Linux x64 CI runner too (same dispatch as build-logic/plugins').
+	// Null on an unrecognized host just means those specific tests fail there -- see
+	// brotli4jNativeForHost's own warning -- not that this whole build should refuse to configure.
+	brotli4jNativeForHost()?.let { testImplementation(it) }
 
 	implementation(libs.common.markwon.core)
 	implementation(libs.common.markwon.linkify)