scala - How to exclude transitive dependency in Sbt ( in context of assembly plugin )? -

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i have 2 sbt projects, my-commons , my-service.

my-commons

with dependencies

librarydependencies ++= seq(   "nz.ac.waikato.cms.weka" % "attributeselectionsearchmethods" % "1.0.7",   "de.bwaldvogel" % "liblinear" % "1.95"   "io.dropwizard.metrics" % "metrics-graphite" % "3.1.2",   "com.github.nscala-time" %% "nscala-time" % "2.2.0",   "org.apache.hive" % "hive-jdbc" % "1.1.0-cdh5.4.5",   "org.apache.hadoop" % "hadoop-common" % "2.6.0-cdh5.4.5",   "org.apache.hadoop" % "hadoop-hdfs" % "2.6.0-cdh5.4.5" )

my-service:

with dependencies

librarydependencies ++= {   seq(     "ch.qos.logback" % "logback-classic" % "1.0.13",     "io.spray" %% "spray-httpx" % "1.3.3",     "io.spray" %% "spray-json" % "1.3.2",     "io.spray" %% "spray-can" % "1.3.3",     "io.spray" %% "spray-routing" % "1.3.3",     "io.spray" %% "spray-testkit" % "1.3.3" % "test",     "com.typesafe.akka" %% "akka-actor" % "2.3.9",     "com.typesafe.akka" %% "akka-testkit" % "2.3.9" % "test",     "org.specs2" %% "specs2-core" % "2.3.11" % "test",     "org.json4s" %% "json4s-native" %  "3.2.11",     "org.json4s" %% "json4s-ext" %  "3.2.11",     "org.mockito" % "mockito-all" % "1.8.4" % "test",     "com.mycommon.projects" % "my-commons" % "1.0.+"   )

i'm using assembly sbt plugin

   addsbtplugin("com.eed3si9n" % "sbt-assembly" % "0.11.2")

i'm getting error on sbt assembly:

at java.lang.thread.run(thread.java:745) [error] (*:assembly) deduplicate: different file contents found in following: [error] /home/me/.ivy2/cache/org.slf4j/slf4j-api/jars/slf4j-api-1.7.7.jar:meta-inf/maven/org.slf4j/slf4j-api/pom.properties [error] /home/me/.ivy2/cache/com.twitter/parquet-hadoop-bundle/jars/parquet-hadoop-bundle-1.5.0-cdh5.4.5.jar:meta-inf/maven/org.slf4j/slf4j-api/pom.properties

i've tried exclude libs build no success. 

librarydependencies ~= { _ map {   case m if m.organization.startswith("org.apache") || m.organization.startswith("com.twitter") || m.name.contains("parquet") =>    m.exclude("org.slf4j","slf4j-api").    exclude("org.slf4j","slf4j-log4j12")    case m => m  }}

probably i'm doing wrong... how can resolve dependency hell?

in case, files exist different content , can't merged sbt assembly plugin.

two approaches possible

approach 1:

use merge filter of assembly plugin specify, files keep, e.g.

val sharedmergestrategy: (string => mergestrategy) => string => mergestrategy =   (old: (string) => mergestrategy) => {     case x if x.startswith("meta-inf/eclipsef.rsa") => mergestrategy.last     case x if x.startswith("meta-inf/mailcap") => mergestrategy.last     case x if x.endswith("plugin.properties") => mergestrategy.last     case x => old(x)   }

approach 2:

see http://www.scala-sbt.org/0.13/docs/library-management.html#exclude+transitive+dependencies on how exclude transitive dependencies.


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