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@mrjameshamilton mrjameshamilton released this 29 Jun 12:02
· 301 commits to master since this release
v7.1.0
91e0206

Version 7.1 (June 2021)

AGP 7 compatible Gradle plugin

The way ProGuard is integrated into Android projects is changing because AGP 7 will no longer allow developers to disable R8 with the android.enableR8 Gradle property.

ProGuard 7.1 includes a new Gradle plugin which allows for a seamless integration with this new AGP version. A detailed and step-by-step guide for transition from the previous plugin is provided in the upgrading guide.

Java support

New Java versions are released every 6 months.
To allow ProGuard to continue to optimize, obfuscate and shrink Java class files we have added support for the latest releases, up to Java 16.
This includes

  • Add support for processing Java 14, 15 and 16 class files. (PGC-0015, PGD-0064)
  • Add support for Java 14 sealed classes. (PGD-0064)
  • Add support for records (previewed in Java 15/16, targeted for Java 17). (PGD-0064)

New optimizations

ProGuard 7.1 adds 5 new code optimizations. These optimization aim at reducing the number of classes required by the application and help pinpointing the specialized type wherever possible. This can have a positive impact on code shrinking and application performances.

  • method/specialization/returntype - specializes the types of method return values, whenever possible.
  • method/specialization/parametertype - specializes the types of method parameters, whenever possible.
  • method/generalization/class - generalizes the classes of method invocations, whenever possible.
  • field/specialization/type - specializes the types of fields, whenever possible.
  • field/generalization/class - generalizes the classes of field accesses, whenever possible.

Maven central

ProGuard was previously hosted at JCenter, but this repository has recently been removed.
ProGuard is now published to Maven Central.

  • Simple integration : follow the gradle setup instructions to select the mavenCentral() repository and dependencies to the proguard-gradle artifact.

Easier configuration

The -addconfigurationdebugging allows to help configuring ProGuard -keep rules. For more details and to see this in action have a look at Configuring ProGuard, an Easy Step-by-Step Tutorial.

-addconfigurationdebugging previously reported -keep rule suggestions for classes, methods or fields that did not exist in the app. Such -keep rules are not necessary.

ProGuard 7.1 improves the suggestion of -keep rules by only suggesting rules for classes, methods and fields that were actually in the original application (DGD-3264).

  • More precise keep rule suggestions provided by -addconfigurationdebugging.
  • Easier ProGuard -keep rules configuration.
  • Reduced ProGuard configuration size.

Miscellaneous

Improvements

  • Remove Gradle plugin dependency on Android build tools. (PGD-0066)
  • Improve error message when missing classes result in an incomplete class hierarchy. (DGD-0013)
  • Improve speed of horizontal class merging. (DGD-1471)
  • Fix potential NullPointerException during GSON optimization. (T3568, T3607)
  • Fix potential dangling switch labels and next local index in GsonDeserializationOptimizer.
  • Fix potential NoClassDefFoundError at runtime after applying Gson optimization to library project. (T2374)
  • Improve general performance and stability of optimization.

Bug fixes

  • Fix ProGuardTask Gradle task compatibility with Gradle 7. (PGD-0136)
  • Fix potentially incorrect class merging optimizations that could cause a run-time NullPointerException. (DGD-3377)
  • Fix Gradle task error when using an existing -outjar directory. (PGD-0106)
  • Fix potential class merging optimization issue resulting in ArrayIndexOutOfBoundsException during build. (DGD-1995)
  • Fix enum unboxing for already obfuscated code. (DGD-0567)
  • Fix potential parameter removal optimization issue when optimizing constructors. (PGD-0018, PGD-0019)
  • Fix potential IllegalArgumentException (Stack size becomes negative) in class/merging/wrapper optimization. (DGD-2587)
  • Fix wrapper class merging with new/dup/astore sequences. (DGD-1564)
  • Fix potential incorrect removal of exception handlers during optimization. (DGD-3036)
  • Fix potential, incorrect advanced code optimizations. (DGD-3289)
  • Disallow merging of nest hosts or members during class merging optimization. (PGD-0037)
  • Fix packaging of Ant plugin. (PGD-0052)
  • Fix potential IllegalArgumentException in GSON optimization. (PGD-0047)
  • Fix writing of kept directories. (PGD-0110)
  • Fix storage and alignment of uncompressed zip entries. (DGD-2390)
  • Fix processing of constant boolean arrays. (DGD-2338)
  • Prevent injected classes from being merged into other classes.
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