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[Xamarin.Android.Build.Tasks] redistribute
proguard-android.txt fro…
…m Android gradle plugin Context: https://discord.com/channels/732297728826277939/732297837953679412/1303383272918618163 A customer found their app grew in size when building on Windows versus macOS. The difference being a file that was passed to the `<R8/>` task on Windows, but not on macOS: C:\Users\[username]\AppData\Local\Android\Sdk\tools\proguard\proguard-android.txt `tools` is *ancient*, as any Android SDK should be using `cmdline-tools` now. Let's stop using this file as a default set of proguard rules. But we need to use the *right* set of proguard rules, reading the text of the old one: > This file is no longer maintained and is not used by new (2.2+) > versions of the # Android plugin for Gradle. Instead, the Android > plugin for Gradle generates the # default rules at build time and > stores them in the build directory. I found the source code for the gradle task that generates the new files at: * https://cs.android.com/android-studio/platform/tools/base/+/mirror-goog-studio-main:build-system/gradle-core/src/main/java/com/android/build/gradle/ProguardFiles.java;l=116 In order to get this file, we can setup an empty gradle project using the Android gradle plugin: plugins { id 'com.android.application' version '8.7.0' } Which, hopefully, dependabot is able to update this version. Then we can run the task: .\gradlew extractProguardFiles This outputs files such as: src\proguard-android\build\intermediates\default_proguard_files\global\proguard-android-optimize.txt-8.7.0 src\proguard-android\build\intermediates\default_proguard_files\global\proguard-android.txt-8.7.0 src\proguard-android\build\intermediates\default_proguard_files\global\proguard-defaults.txt-8.7.0 For now, I simply redistributed the `proguard-android.txt` file, but we could consider making `proguard-android-optimize.txt` useable in the future. I believe the only difference is the `-allowaccessmodification` flag, which users could put in their own proguard rules.
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,6 @@ | ||
| .idea/ | ||
| build/ | ||
| out/ | ||
| .classpath | ||
| .project | ||
| .settings/ |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,14 @@ | ||
| plugins { | ||
| id 'com.android.application' version '8.7.0' | ||
| } | ||
|
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| repositories { | ||
| google() | ||
| mavenCentral() | ||
| } | ||
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| android { | ||
| namespace 'com.microsoft.proguard.android' | ||
| // Setting the minimum we support at the moment, might not matter | ||
| compileSdk 21 | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,10 @@ | ||
| <Project Sdk="Microsoft.Build.NoTargets"> | ||
| <PropertyGroup> | ||
| <OutputType>Exe</OutputType> | ||
| <TargetFramework>netstandard2.0</TargetFramework> | ||
| <AppendTargetFrameworkToOutputPath>false</AppendTargetFrameworkToOutputPath> | ||
| <OutputPath Condition="'$(OutputPath)'==''">bin\$(Configuration)</OutputPath> | ||
| </PropertyGroup> | ||
| <Import Project="..\..\Configuration.props" /> | ||
| <Import Project="proguard-android.targets" /> | ||
| </Project> |
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| @@ -0,0 +1,34 @@ | ||
| <Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003"> | ||
| <PropertyGroup> | ||
| <_Destination>$(MicrosoftAndroidSdkOutDir)proguard-android.txt</_Destination> | ||
| </PropertyGroup> | ||
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| <Target Name="_GenerateProGuardRules" | ||
| BeforeTargets="Build" | ||
| Inputs="$(MSBuildThisFile);build.gradle;settings.gradle" | ||
| Outputs="$(_Destination)"> | ||
| <Exec | ||
| Command=""$(GradleWPath)" extractProguardFiles $(GradleArgs)" | ||
| EnvironmentVariables="JAVA_HOME=$(JavaSdkDirectory);APP_HOME=$(GradleHome)" | ||
| WorkingDirectory="$(MSBuildThisFileDirectory)" | ||
| /> | ||
| <ItemGroup> | ||
| <_ProguardRules Include="$(MSBuildThisFileDirectory)build\intermediates\default_proguard_files\global\proguard-android.txt-*" /> | ||
| </ItemGroup> | ||
| <Copy | ||
| SourceFiles="@(_ProguardRules)" | ||
| DestinationFiles="$(_Destination)" | ||
| /> | ||
| <Touch Files="$(_Destination)" /> | ||
| </Target> | ||
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| <Target Name="_CleanProguardRules" BeforeTargets="Clean"> | ||
| <Delete Files="$(_Destination)" /> | ||
| <Exec | ||
| Command=""$(GradleWPath)" clean $(GradleArgs)" | ||
| EnvironmentVariables="JAVA_HOME=$(JavaSdkDirectory);APP_HOME=$(GradleHome)" | ||
| WorkingDirectory="$(MSBuildThisFileDirectory)" | ||
| /> | ||
| </Target> | ||
|
|
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| </Project> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,8 @@ | ||
| pluginManagement { | ||
| repositories { | ||
| gradlePluginPortal() | ||
| google() | ||
| mavenCentral() | ||
| } | ||
| } | ||
| rootProject.name = 'proguard-android' |