Add proguard task to reduce size of the jar

2 files changed, 128 insertions, 6 deletions

diff --git a/dokka-fatjar/build.gradle b/dokka-fatjar/build.gradle
index 0d1951e8..467385e1 100644
--- a/dokka-fatjar/build.gradle
+++ b/dokka-fatjar/build.gradle
@@ -1,13 +1,19 @@
 group 'org.jetbrains.dokka'
 version '1.0.0-beta-1038'
+import proguard.gradle.ProGuardTask
+
+buildscript {
+    repositories {
+        jcenter()
+    }
+    dependencies {
+        classpath 'net.sf.proguard:proguard-gradle:5.2.1'
+    }
+}
 
 apply plugin: 'java'
 apply plugin: 'maven-publish'
 
-dependencies {
-    compile 'org.fusesource.jansi:jansi:[1.11,2.0)'
-}
-
 task wrapper(type: Wrapper) {
     gradleVersion = '2.5'
     distributionUrl = "https://services.gradle.org/distributions/gradle-$gradleVersion-all.zip"
@@ -17,20 +23,34 @@ task sourceJar(type: Jar) {
     from fileTree('../src')
 }
 
+task proguard(type: ProGuardTask) {
+    configuration 'dokka.pro'
+
+    injars  'build/libs/dokka-fatjar-1.0.0-beta-1038.jar'
+    outjars 'build/libs/dokka-fatjar-1.0.0-beta-1038.out.jar'
+}
+
 jar {
     manifest {
         attributes "Implementation-Title": "Dokka Kotlin Documentation tool"
         attributes "Implementation-Version": version
-        attributes "Main-Class" : "org.jetbrains.dokka.DokkaPackage"
+        attributes "Main-Class" : "org.jetbrains.dokka.MainKt"
     }
+    duplicatesStrategy = DuplicatesStrategy.EXCLUDE
 
-    fileTree(project.file('../lib')).filter { it.name.endsWith('.jar') && !it.name.contains("-sources") }.each {
+    fileTree(project.file('../lib')).filter {
+        it.name.endsWith('.jar') &&
+                !it.name.contains("-sources") &&
+                !it.name.contains("-javadoc")
+    }.each {
         from (zipTree(it)) {
             exclude 'META-INF/MANIFEST.MF'
             exclude 'META-INF/*.SF'
             exclude 'META-INF/*.DSA'
             exclude 'META-INF/*.RSA'
             exclude '**/*.kt'
+            exclude '**/*.java'
+            exclude '**/*.md'
         }
     }
     from (zipTree(project.file('../out/dokka.jar'))) {
@@ -39,6 +59,8 @@ jar {
         exclude 'META-INF/*.DSA'
         exclude 'META-INF/*.RSA'
         exclude '**/*.kt'
+        exclude '**/*.java'
+        exclude '**/*.md'
     }
 }
 
diff --git a/dokka-fatjar/dokka.pro b/dokka-fatjar/dokka.pro
new file mode 100644
index 00000000..97eae693
--- /dev/null
+++ b/dokka-fatjar/dokka.pro
@@ -0,0 +1,100 @@
+# Include java runtime classes
+-libraryjars  <java.home>/lib/rt.jar
+
+# Keep filenames and line numbers
+-keepattributes SourceFile, LineNumberTable
+
+-target 1.6
+-dontoptimize
+-dontobfuscate
+
+-ignorewarnings
+# -keepdirectories
+
+-dontwarn org.jetbrains.annotations.**
+-dontwarn org.apache.commons.httpclient.**
+-dontwarn org.apache.tools.ant.**
+-dontwarn org.codehaus.plexus.**
+-dontwarn hidden.org.codehaus.plexus.**
+-dontwarn org.fusesource.**
+-dontwarn org.jaxen.jdom.**
+
+-keep class org.jetbrains.dokka.** { *; }
+-keep class org.fusesource.** { *; }
+-keep class org.jdom.input.JAXPParserFactory { *; }
+
+-keep class org.jetbrains.annotations.** {
+    public protected *;
+}
+
+-keep class javax.inject.** {
+    public protected *;
+}
+
+-keep class org.jetbrains.kotlin.** {
+    public protected *;
+}
+
+-keep class org.jetbrains.kotlin.compiler.plugin.** {
+    public protected *;
+}
+
+-keep class org.jetbrains.kotlin.extensions.** {
+    public protected *;
+}
+
+-keep class org.jetbrains.org.objectweb.asm.Opcodes { *; }
+
+-keep class org.jetbrains.kotlin.codegen.extensions.** {
+    public protected *;
+}
+
+-keepclassmembers class com.intellij.openapi.vfs.VirtualFile {
+    public InputStream getInputStream();
+}
+
+-keep class jet.** {
+    public protected *;
+}
+
+-keep class com.intellij.psi.** {
+    public protected *;
+}
+
+# for kdoc & dokka
+-keep class com.intellij.openapi.util.TextRange { *; }
+-keep class com.intellij.lang.impl.PsiBuilderImpl* {
+    public protected *;
+}
+-keep class com.intellij.openapi.util.text.StringHash { *; }
+
+# for gradle plugin and other server tools
+-keep class com.intellij.openapi.util.io.ZipFileCache { public *; }
+
+# for j2k
+-keep class com.intellij.codeInsight.NullableNotNullManager { public protected *; }
+
+-keepclassmembers enum * {
+    public static **[] values();
+    public static ** valueOf(java.lang.String);
+}
+
+-keepclassmembers class * {
+    ** toString();
+    ** hashCode();
+    void start();
+    void stop();
+    void dispose();
+}
+
+-keepclassmembers class org.jetbrains.org.objectweb.asm.Opcodes {
+    *** ASM5;
+}
+
+-keepclassmembers class org.jetbrains.org.objectweb.asm.ClassReader {
+    *** SKIP_CODE;
+    *** SKIP_DEBUG;
+    *** SKIP_FRAMES;
+}
+
+