/// <summary>
/// Generates a Package.proj file for MSBuild to invoke
/// - Generates Resource.designer.dll for rewiring resource values from the final Java project
/// - Links .NET assemblies and places output into /android/assets/assemblies
/// - Extracts assets and resources from Android library projects into /obj/
/// - Copies assets and resources into AAR
/// - Invokes aapt to generate R.txt
/// - One day I would like to get rid of the temp files, but I could not get the MSBuild APIs to work in-process
/// </summary>
public static string GeneratePackageProject(List <IKVM.Reflection.Assembly> assemblies, string outputDirectory, string assembliesDirectory)
{
var mainAssembly = assemblies[0].Location;
outputDirectory = Path.GetFullPath(outputDirectory);
assembliesDirectory = Path.GetFullPath(assembliesDirectory);
var androidDir = Path.Combine(outputDirectory, "android");
var assetsDir = Path.Combine(androidDir, "assets");
var resourceDir = Path.Combine(androidDir, "res");
var manifestPath = Path.Combine(androidDir, "AndroidManifest.xml");
var packageName = Generators.JavaGenerator.GetNativeLibPackageName(mainAssembly);
var project = CreateProject();
var target = project.AddTarget("Build");
//Generate Resource.designer.dll
var resourceDesigner = new ResourceDesignerGenerator
{
Assemblies = assemblies,
MainAssembly = mainAssembly,
OutputDirectory = outputDirectory,
PackageName = packageName,
};
resourceDesigner.Generate();
if (!resourceDesigner.WriteAssembly())
{
//Let's generate CS if this failed
string resourcePath = resourceDesigner.WriteSource();
throw new Exception($"Resource.designer.dll compilation failed! See {resourcePath} for details.");
}
//ResolveAssemblies Task
ResolveAssemblies(target, mainAssembly);
//LinkAssemblies Task
var linkAssemblies = target.AddTask("LinkAssemblies");
linkAssemblies.SetParameter("UseSharedRuntime", "False");
linkAssemblies.SetParameter("LinkMode", LinkMode);
linkAssemblies.SetParameter("LinkDescriptions", "@(LinkDescription)");
linkAssemblies.SetParameter("DumpDependencies", "True");
linkAssemblies.SetParameter("ResolvedAssemblies", "@(ResolvedAssemblies);" + Path.Combine(outputDirectory, "Resource.designer.dll"));
linkAssemblies.SetParameter("MainAssembly", mainAssembly);
linkAssemblies.SetParameter("OutputDirectory", assembliesDirectory);
//Aapt Task to generate R.txt
var aapt = target.AddTask("Aapt");
aapt.SetParameter("ImportsDirectory", outputDirectory);
aapt.SetParameter("OutputImportDirectory", outputDirectory);
aapt.SetParameter("ManifestFiles", manifestPath);
aapt.SetParameter("ApplicationName", packageName);
aapt.SetParameter("JavaPlatformJarPath", Path.Combine(XamarinAndroid.PlatformDirectory, "android.jar"));
aapt.SetParameter("JavaDesignerOutputDirectory", outputDirectory);
aapt.SetParameter("AssetDirectory", assetsDir);
aapt.SetParameter("ResourceDirectory", resourceDir);
aapt.SetParameter("ToolPath", AndroidSdk.GetBuildToolsPaths().First());
aapt.SetParameter("ToolExe", "aapt");
aapt.SetParameter("ApiLevel", XamarinAndroid.TargetSdkVersion);
aapt.SetParameter("ExtraArgs", "--output-text-symbols " + androidDir);
//There is an extra /manifest/AndroidManifest.xml file created
var removeDir = target.AddTask("RemoveDir");
removeDir.SetParameter("Directories", Path.Combine(androidDir, "manifest"));
//NOTE: might avoid the temp file later
var projectFile = Path.Combine(outputDirectory, "Package.proj");
project.Save(projectFile);
return(projectFile);
}
bool CreateAar()
{
var executableSuffix = Platform.IsWindows ? ".exe" : string.Empty;
var jar = Path.Combine(XamarinAndroid.JavaSdkPath, "bin", "jar" + executableSuffix);
var classesDir = Path.Combine(Options.OutputDir, "classes");
var androidDir = Path.Combine(Options.OutputDir, "android");
var name = Path.GetFileNameWithoutExtension(Project.Assemblies[0]).Replace('-', '_');
var args = new List <string> {
"cvf",
Path.Combine(Options.OutputDir, name + ".aar"),
$"-C {androidDir} ."
};
//Copy libmonosgen-2.0.so and libmonodroid.so
const string libMonoSgen = "libmonosgen-2.0.so";
const string libMonoAndroid = "libmono-android.release.so";
foreach (var abi in Directory.GetDirectories(XamarinAndroid.LibraryPath))
{
var abiDir = Path.Combine(androidDir, "jni", Path.GetFileName(abi));
string libMonoSgenSourcePath = Path.Combine(abi, libMonoSgen);
string libMonoSgenDestPath = Path.Combine(abiDir, libMonoSgen);
string libMonoAndroidSourcePath = Path.Combine(abi, libMonoAndroid);
string libMonoAndroidDestPath = Path.Combine(abiDir, "libmonodroid.so"); //NOTE: Xamarin.Android runtime uses different name from APK
if (!File.Exists(libMonoSgenSourcePath) || !File.Exists(libMonoAndroidSourcePath))
{
continue;
}
if (!Directory.Exists(abiDir))
{
Directory.CreateDirectory(abiDir);
}
File.Copy(libMonoSgenSourcePath, libMonoSgenDestPath, true);
File.Copy(libMonoAndroidSourcePath, libMonoAndroidDestPath, true);
}
//Copy JNA native libs
foreach (var file in Directory.GetFiles(Path.Combine(FindDirectory("external"), "jna"), "android-*"))
{
using (var stream = File.OpenRead(file))
using (var zip = new ZipArchive(stream))
{
foreach (var entry in zip.Entries)
{
//Skip non-*.so files
if (!entry.FullName.EndsWith(".so", StringComparison.Ordinal))
{
continue;
}
var arch = Path.GetFileNameWithoutExtension(file);
string abi;
switch (arch)
{
case "android-aarch64":
abi = "arm64-v8a";
break;
case "android-arm":
abi = "armeabi";
break;
case "android-armv7":
abi = "armeabi-v7a";
break;
case "android-x86-64":
abi = "x86_64";
break;
default:
abi = arch.Replace("android-", string.Empty);
break;
}
var abiDir = Path.Combine(androidDir, "jni", Path.GetFileName(abi));
if (!Directory.Exists(abiDir))
{
Directory.CreateDirectory(abiDir);
}
using (var zipEntryStream = entry.Open())
using (var fileStream = File.Create(Path.Combine(abiDir, entry.Name)))
{
zipEntryStream.CopyTo(fileStream);
}
}
}
}
//Copy jar to android/classes.jar
File.Copy(Path.Combine(Options.OutputDir, name + ".jar"), Path.Combine(androidDir, "classes.jar"), true);
//Copy .NET assemblies
var assembliesDir = Path.Combine(androidDir, "assets", "assemblies");
if (!Directory.Exists(assembliesDir))
{
Directory.CreateDirectory(assembliesDir);
}
foreach (var assembly in Project.Assemblies)
{
File.Copy(assembly, Path.Combine(assembliesDir, Path.GetFileName(assembly)), true);
}
//Copy any referenced assemblies such as mscorlib.dll
List <string> referencedAssemblies = new List <string>();
foreach (var assembly in Assemblies)
{
foreach (var reference in assembly.GetReferencedAssemblies())
{
if (!referencedAssemblies.Contains(reference.Name))
{
referencedAssemblies.Add(reference.Name);
}
}
}
Diagnostics.Message("Linking assemblies...");
//Performs Xamarin.Android build tasks such as Linking, Resource/Asset extraction, invoking aapt.
var project = XamarinAndroidBuild.GeneratePackageProject(Assemblies, Options);
if (!MSBuild(project))
{
return(false);
}
//Generate Resource.designer.dll
var resourceDesigner = new ResourceDesignerGenerator
{
Assemblies = Assemblies,
MainAssembly = Assemblies[0].Location,
OutputDirectory = assembliesDir,
JavaResourceFile = Path.Combine(androidDir, "R.txt"),
};
resourceDesigner.Generate();
if (!resourceDesigner.WriteAssembly())
{
//Let's generate CS if this failed
string resourcePath = Path.Combine(Options.OutputDir, "Resource.designer.cs");
resourceDesigner.WriteSource(resourcePath);
throw new Exception($"Resource.designer.dll compilation failed! See {resourcePath} for details.");
}
//Runs some final processing on .NET assemblies
XamarinAndroidBuild.ProcessAssemblies(Options.OutputDir);
var invocation = string.Join(" ", args);
var output = Invoke(jar, invocation);
return(output.ExitCode == 0);
}