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Generate proguard rules on-demand (#236)
* Add ProguardConfig * Wire in proguard config to externally generated files * Remove generated file bits * Add tests * Nix unused import
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auto-value-gson-runtime/src/main/resources/META-INF/proguard/autovaluegson.pro
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,35 +1,3 @@ | ||
| # Annotations are for embedding static analysis information. | ||
| -dontwarn org.jetbrains.annotations.** | ||
| -dontwarn com.google.errorprone.annotations.** | ||
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|
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| # Retain generated TypeAdapters if annotated type is retained. | ||
| -if @com.ryanharter.auto.value.gson.GenerateTypeAdapter class * | ||
| -keep class <1>_GsonTypeAdapter { | ||
| <init>(...); | ||
| <fields>; | ||
| } | ||
| -if @com.ryanharter.auto.value.gson.GenerateTypeAdapter class **$* | ||
| -keep class <1>_<2>_GsonTypeAdapter { | ||
| <init>(...); | ||
| <fields>; | ||
| } | ||
| -if @com.ryanharter.auto.value.gson.GenerateTypeAdapter class **$*$* | ||
| -keep class <1>_<2>_<3>_GsonTypeAdapter { | ||
| <init>(...); | ||
| <fields>; | ||
| } | ||
| -if @com.ryanharter.auto.value.gson.GenerateTypeAdapter class **$*$*$* | ||
| -keep class <1>_<2>_<3>_<4>_GsonTypeAdapter { | ||
| <init>(...); | ||
| <fields>; | ||
| } | ||
| -if @com.ryanharter.auto.value.gson.GenerateTypeAdapter class **$*$*$*$* | ||
| -keep class <1>_<2>_<3>_<4>_<5>_GsonTypeAdapter { | ||
| <init>(...); | ||
| <fields>; | ||
| } | ||
| -if @com.ryanharter.auto.value.gson.GenerateTypeAdapter class **$*$*$*$*$* | ||
| -keep class <1>_<2>_<3>_<4>_<5>_<6>_GsonTypeAdapter { | ||
| <init>(...); | ||
| <fields>; | ||
| } |
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85
auto-value-gson/src/main/java/com/ryanharter/auto/value/gson/ProguardConfig.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| package com.ryanharter.auto.value.gson; | ||
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|
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| import com.google.auto.value.AutoValue; | ||
| import com.squareup.javapoet.ClassName; | ||
| import java.io.IOException; | ||
| import java.io.Writer; | ||
| import java.util.List; | ||
| import javax.annotation.processing.Filer; | ||
| import javax.lang.model.element.Element; | ||
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|
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| import static javax.tools.StandardLocation.CLASS_OUTPUT; | ||
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| /** | ||
| * Represents a proguard configuration for a given spec. This covers two main areas: | ||
| * <ul> | ||
| * <li>Keeping the target class name to GenerateTypeAdapter.FACTORY's reflective lookup of the adapter.</li> | ||
| * <li>Keeping the generated adapter class name + public constructor for reflective lookup.</li> | ||
| * </ul> | ||
| * <p> | ||
| * Each rule is intended to be as specific and targeted as possible to reduce footprint, and each is | ||
| * conditioned on usage of the original target type. | ||
| * <p> | ||
| * To keep this processor as an {@code ISOLATING} incremental processor, we generate one file per | ||
| * target class with a deterministic name (see {@link #outputFile}) with an appropriate originating | ||
| * element. | ||
| */ | ||
| @AutoValue | ||
| abstract class ProguardConfig { | ||
| abstract ClassName targetClass(); | ||
| abstract ClassName adapterName(); | ||
| abstract List<String> adapterConstructorParams(); | ||
| abstract String outputFile(); | ||
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| static ProguardConfig create( | ||
| ClassName targetClass, | ||
| ClassName adapterName, | ||
| List<String> adapterConstructorParams) { | ||
| String outputFile = "META-INF/proguard/avg-" + targetClass.canonicalName() + ".pro"; | ||
| return new AutoValue_ProguardConfig(targetClass, | ||
| adapterName, | ||
| adapterConstructorParams, | ||
| outputFile); | ||
| } | ||
|
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| /** Writes this to {@code filer}. */ | ||
| final void writeTo(Filer filer, Element... originatingElements) throws IOException { | ||
| try (Writer writer = filer.createResource(CLASS_OUTPUT, "", outputFile(), originatingElements) | ||
| .openWriter()) { | ||
| writeTo(writer); | ||
| } | ||
| } | ||
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| private void writeTo(Appendable out) throws IOException { | ||
| // | ||
| // -if class {the target class} | ||
| // -keepnames class {the target class} | ||
| // -if class {the target class} | ||
| // -keep class {the generated adapter} { | ||
| // <init>(...); | ||
| // } | ||
| // | ||
| String targetName = targetClass().canonicalName(); | ||
| String adapterCanonicalName = adapterName().canonicalName(); | ||
| // Keep the class name for GenerateTypeAdapter.FACTORY's reflective lookup based on it | ||
| out.append("-if class ") | ||
| .append(targetName) | ||
| .append("\n"); | ||
| out.append("-keepnames class ") | ||
| .append(targetName) | ||
| .append("\n"); | ||
| out.append("-if class ") | ||
| .append(targetName) | ||
| .append("\n"); | ||
| out.append("-keep class ") | ||
| .append(adapterCanonicalName) | ||
| .append(" {\n"); | ||
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| // Keep the constructor for GenerateTypeAdapter.FACTORY's reflective lookup | ||
| String constructorArgs = String.join(",", adapterConstructorParams()); | ||
| out.append(" <init>(") | ||
| .append(constructorArgs) | ||
| .append(");\n"); | ||
| out.append("}\n"); | ||
| } | ||
| } |
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