Modify ProGuard rules to automatically shrink object files

OpenKeychain/build.gradle

@@ -191,7 +191,13 @@ android {
     buildTypes {
         release {
             minifyEnabled true
-            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules-release.pro'
+
+            proguardFiles getDefaultProguardFile('proguard-android.txt'),
+                          'proguard-rules-base.pro',
+                          'proguard-rules-bouncycastle.pro',
+                          'proguard-rules-okio.pro',
+                          'proguard-rules-okhttp.pro',
+                          'proguard-rules-support.pro'
 
             // Reference them in the java files with e.g. BuildConfig.ACCOUNT_TYPE.
             buildConfigField "String", "ACCOUNT_TYPE", "\"org.sufficientlysecure.keychain.account\""
@@ -207,10 +213,17 @@ android {
         }
 
         debug {
-            // disable ProGuard for faster compile times for debug builds
-            minifyEnabled false
+            minifyEnabled true
 
-            multiDexEnabled true
+            proguardFiles = buildTypes.release.proguardFiles
+
+            testProguardFiles getDefaultProguardFile('proguard-android.txt'),
+                          'proguard-rules-base.pro',
+                          'proguard-rules-bouncycastle.pro',
+                          'proguard-rules-okio.pro',
+                          'proguard-rules-okhttp.pro',
+                          'proguard-rules-support.pro',
+                          'proguard-rules-test.pro'
 
             applicationIdSuffix ".debug"
 

OpenKeychain/proguard-rules-base.pro

@@ -0,0 +1,17 @@
+# Documentation for ProGuard:
+#   http://developer.android.com/guide/developing/tools/proguard.html
+#   http://proguard.sourceforge.net/
+
+-dontoptimize
+-dontpreverify
+
+-dontnote **
+
+-keepattributes **
+
+-keep class org.sufficientlysecure.keychain.** { *; }
+
+# * Obfuscate android.support.v7.view.menu.** to fix Samsung Android 4.2 bug
+#   https://code.google.com/p/android/issues/detail?id=78377
+# * Disable obfuscation for all other classes
+-keepnames class !android.support.v7.view.menu.**, ** { *; }

OpenKeychain/proguard-rules-bouncycastle.pro

@@ -0,0 +1,3 @@
+-keep class org.bouncycastle.jcajce.provider.** { *; }
+
+-dontwarn javax.naming.**

OpenKeychain/proguard-rules-okhttp.pro

@@ -0,0 +1,2 @@
+-dontwarn javax.annotation.Nullable
+-dontwarn javax.annotation.ParametersAreNonnullByDefault

OpenKeychain/proguard-rules-okio.pro

@@ -0,0 +1,2 @@
+-dontwarn org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement
+-dontwarn okio.**

OpenKeychain/proguard-rules-release.pro

@@ -1,21 +0,0 @@
-# Documentation for ProGuard:
-#   http://developer.android.com/guide/developing/tools/proguard.html
-#   http://proguard.sourceforge.net/
-
-#-dontshrink # shrinking enabled, see below
-#-dontobfuscate # obfuscation enabled for one class (see below)
--dontoptimize
--dontpreverify
--keepattributes **
--dontwarn **
--dontnote **
-
-# Rules are defined as negation filters!
-# (! = negation filter, ** = all subpackages)
-# Keep everything (** {*;}) except...
-
-# * Obfuscate android.support.v7.view.menu.** to fix Samsung Android 4.2 bug
-#   https://code.google.com/p/android/issues/detail?id=78377
-# * Remove unneeded Bouncy Castle packages to be under 64K limit
-#   http://developer.android.com/tools/building/multidex.html
--keep class !android.support.v7.view.menu.**,!org.bouncycastle.crypto.tls.**,!org.bouncycastle.pqc.**,!org.bouncycastle.x509.**,!org.bouncycastle.jcajce.provider.asymmetric.dstu.**,!org.bouncycastle.jcajce.provider.asymmetric.ecgost.**,!org.bouncycastle.jcajce.provider.asymmetric.gost.**,!org.bouncycastle.jcajce.provider.asymmetric.DSTU4145,!org.bouncycastle.jcajce.provider.asymmetric.ECGOST,!org.bouncycastle.jcajce.provider.asymmetric.GOST,!org.bouncycastle.asn1.cmp.**,!org.bouncycastle.asn1.crmf.**,!org.bouncycastle.asn1.dvcs.**,!org.bouncycastle.asn1.smime.**,!org.bouncycastle.asn1.tsp.**,** {*;}

OpenKeychain/proguard-rules-support.pro

@@ -0,0 +1 @@
+-keep class android.support.v7.widget.SearchView { *; }

OpenKeychain/proguard-rules-test.pro

@@ -0,0 +1,11 @@
+-dontwarn android.test.**
+-dontwarn com.android.support.test.**
+-dontwarn android.databinding.**
+-dontwarn javax.annotation.**
+
+-dontwarn org.hamcrest.**
+-dontwarn org.junit.**
+
+-dontwarn com.squareup.**
+
+-dontobfuscate