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POHow do I exclude/include specific packages using xsbt-proguard-plugin?
 

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  1. POHow do I exclude/include specific packages using xsbt-proguard-plugin?
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    <p>I'm using <a href="https://github.com/siasia/xsbt-proguard-plugin" rel="nofollow noreferrer">xsbt-proguard-plugin</a>, which is an SBT plugin for working with Proguard.</p> <p>I'm trying to come up with a Proguard configuration for a <a href="https://github.com/snowplow/snowplow-log-deserializers" rel="nofollow noreferrer">Hive Deserializer</a> I've written, which has the following dependencies:</p> <pre><code>// project/Dependencies.scala val hadoop = "org.apache.hadoop" % "hadoop-core" % V.hadoop val hive = "org.apache.hive" % "hive-common" % V.hive val serde = "org.apache.hive" % "hive-serde" % V.hive val httpClient = "org.apache.httpcomponents" % "httpclient" % V.http val logging = "commons-logging" % "commons-logging" % V.logging val specs2 = "org.specs2" %% "specs2" % V.specs2 % "test" </code></pre> <p>Plus an unmanaged dependency:</p> <pre><code>// lib/UserAgentUtils-1.6.jar </code></pre> <p>Because most of these are either for local unit testing or are available within a Hadoop/Hive environment anyway, I want my minified jarfile to only include:</p> <ul> <li>The Java classes SnowPlowEventDeserializer.class and SnowPlowEventStruct.class</li> <li><code>org.apache.httpcomponents.httpclient</code></li> <li><code>commons-logging</code></li> <li><code>lib/UserAgentUtils-1.6.jar</code></li> </ul> <p>But I'm really struggling to get the syntax right. Should I start from a whitelist of classes I want to keep, or explicitly filter out the Hadoop/Hive/Serde/Specs2 libraries? I'm aware of <a href="https://stackoverflow.com/questions/4830474/how-to-keep-exclude-a-particular-package-path-when-using-proguard">this SO question</a> but it doesn't seem to apply here.</p> <p>If I initially try the whitelist approach:</p> <pre><code>// Should be equivalent to sbt&gt; package import ProguardPlugin._ lazy val proguard = proguardSettings ++ Seq( proguardLibraryJars := Nil, proguardOptions := Seq( "-keepattributes *Annotation*,EnclosingMethod", "-dontskipnonpubliclibraryclassmembers", "-dontoptimize", "-dontshrink", "-keep class com.snowplowanalytics.snowplow.hadoop.hive.SnowPlowEventDeserializer", "-keep class com.snowplowanalytics.snowplow.hadoop.hive.SnowPlowEventStruct" ) ) </code></pre> <p>Then I get a Hadoop processing error, so clearly Proguard is still trying to bundle Hadoop:</p> <pre><code>proguard: java.lang.IllegalArgumentException: Can't find common super class of [[Lorg/apache/hadoop/fs/FileStatus;] and [[Lorg/apache/hadoop/fs/s3/Block;] </code></pre> <p>Meanwhile if I try <a href="http://proguard.sourceforge.net/index.html#manual/usage.html" rel="nofollow noreferrer">Proguard's filtering syntax</a> to build up the blacklist of libraries I don't want to include:</p> <pre><code>import ProguardPlugin._ lazy val proguard = proguardSettings ++ Seq( proguardLibraryJars := Nil, proguardOptions := Seq( "-keepattributes *Annotation*,EnclosingMethod", "-dontskipnonpubliclibraryclassmembers", "-dontoptimize", "-dontshrink", "-injars !*hadoop*.jar" ) ) </code></pre> <p>Then this doesn't seem to work either:</p> <pre><code>proguard: java.io.IOException: Can't read [/home/dev/snowplow-log-deserializers/!*hadoop*.jar] (No such file or directory) </code></pre> <p>Any help greatly appreciated!</p>
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