I am having problem building a fat jar for an open source project I downloaded. As is when I ran sbt assembly, each subproject creates a jar but includes all the scala lib classes and log4j classes (even after I added "provided" in the dependency lines). There is no assembly.sbt or any other assembly instructions that I can see. When I move an assembly.sbt from another working project, I get a
error: not found: type MergeStrategy
val defaultMergeStrategy: String => MergeStrategy = {
The entire assembly.sbt is
import AssemblyKeys._ // put this at the top of the file
assemblySettings
val defaultMergeStrategy: String => MergeStrategy = {
case _ => MergeStrategy.first
}
mergeStrategy in assembly <<= (mergeStrategy in assembly) { (old) => {
case m if m.toLowerCase.matches("meta-inf/.*\\.sf$") => MergeStrategy.discard
case PathList("META-INF", "MANIFEST.MF") => MergeStrategy.discard
case _ => MergeStrategy.first
}
}
Can any one help me fix this? Why does the assembly.sbt work for all my other projects and fails here? is that another way to remove the scala lib and log4j classes?
Related
I have a scala project which contain multiple main methods. I want to generate a fat jar so that I can run one of the main method related code.
build.sbt
lazy val commonSettings = Seq(
version := "0.1-SNAPSHOT",
organization := "my.company",
scalaVersion := "2.11.12",
test in assembly := {}
)
lazy val app = (project in file("app")).
settings(commonSettings: _*).
settings(
mainClass in assembly := Some("my.test.Category")
)
assemblyMergeStrategy in assembly := {
case "reference.conf" => MergeStrategy.concat
case "META-INF/services/org.apache.spark.sql.sources.DataSourceRegister" => MergeStrategy.concat
case PathList("META-INF", xs#_*) => MergeStrategy.discard
case _ => MergeStrategy.first
}
plugins.sbt
addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.15.0")
By this Manifest file is generated successfully in my resource folder.
next I run sbt assembly and executable jar is generated successfully.
When i run java -jar category-assembly-0.1.jar i get the following error
no main manifest attribute, in category-assembly-0.1.jar
I tried many steps given in the internet but i keep getting this error
UPDATE
Currently following is included in my build.sbt.
lazy val spark: Project = project
.in(file("./spark"))
.settings(
mainClass in assembly := Some("my.test.Category"),
mainClass in (Compile, packageBin) := Some("my.test.Category"),
mainClass in (Compile, run) := Some("my.test.Category")
)
assemblyMergeStrategy in assembly := {
case "reference.conf" => MergeStrategy.concat
case "META-INF/services/org.apache.spark.sql.sources.DataSourceRegister" => MergeStrategy.concat
case PathList("META-INF", xs#_*) => MergeStrategy.discard
case _ => MergeStrategy.first
}
After building the artifacts and run the command sbt assembly and tried running the genrated jar im still getting the same error as follows
no main manifest attribute, in category-assembly-0.1.jar
I had the same issue when i was deploying on EMR.
Add the following to your setting in build.sbt and it will be alright.
lazy val spark: Project = project
.in(file("./spark"))
.settings(
...
// set the main class for packaging the main jar
mainClass in (Compile, packageBin) := Some("com.orgname.name.ClassName"),
mainClass in (Compile, run) := Some("com.orgname.name.ClassName"),
...
)
This essentially sets the name of your existing class in your project as default mainClass. i set both for packageBin and run so you should be alright.
Just don't forget to rename the com.orgname.name.ClassName to your classname.
(This is just to refresh your memory)
Classname consists of <PackageName>/<ClassName>.
For example:
package com.orgname.name
object ClassName {}
Trying to build a fat jar of a play (2.6.6) + scala.js application, getting
[error] (play/*:assembly) deduplicate: different file contents found in the following:
[error] /home/user/.ivy2/cache/com.typesafe.play/play_2.12/jars/play_2.12-2.6.6.jar:play/reference-overrides.conf
[error] /home/user/.ivy2/cache/com.typesafe.play/play-akka-http-server_2.12/jars/play-akka-http-server_2.12-2.6.6.jar:play/reference-overrides.conf
build.sbt
mainClass in assembly := Some("play.core.server.ProdServerStart")
//fullClasspath in assembly += Attributed.blank(PlayKeys.playPackageAssets.value)
(Inspired by https://www.playframework.com/documentation/2.6.6/Deploying#Using-the-SBT-assembly-plugin)
(but not using playPackageAssets at the moment)
my assembly.sbt contains just addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.14.5")
I also tried with a "non-standard" config:
assemblyMergeStrategy in assembly := {
// Building fat jar without META-INF
case PathList("META-INF", xs # _*) => MergeStrategy.discard
// Take last config file
case PathList(ps # _*) if ps.last endsWith ".conf" => MergeStrategy.last
case o =>
val oldStrategy = (assemblyMergeStrategy in assembly).value
oldStrategy(o)
}
but no luck either. How to fix that the/a correct way?
You need to tell sbt-assembly how to merge these two reference-overrides.conf config files:
assemblyMergeStrategy in assembly := {
// Building fat jar without META-INF
case PathList("META-INF", xs # _*) => MergeStrategy.discard
// Take last config file
case PathList(ps # _*) if ps.last endsWith ".conf" => MergeStrategy.last
case PathList("reference-overrides.conf") => MergeStrategy.concat
case o =>
val oldStrategy = (assemblyMergeStrategy in assembly).value
oldStrategy(o)
}
I faced the same problem and solved it by adding the following to .
case PathList("play", "reference-overrides.conf") => MergeStrategy.concat
I have a big root sbt project that contains several sub-projects. Among those project definitions there is a lot of code duplication that I am trying to remove.
For example every assembly project contains the following code:
project
.enablePlugins(sbtassembly.AssemblyPlugin)
.settings(
mainClass in Compile := Some(mainClassName),
assemblyJarName in assembly := jarName,
assemblyMergeStrategy in assembly := {
case PathList("META-INF", xs#_*) => MergeStrategy.discard
case PathList("sandbox.sc") => MergeStrategy.discard
case PathList("org", "joda", "time", xs#_*) => MergeStrategy.first
case PathList("reference.conf") => MergeStrategy.concat
case x => MergeStrategy.deduplicate
}
)
Instead i would like to write something like that:
project
.assembly(className, jarName)
Is it possible to achieve such syntax? I know it is possible to achieve this syntax in a typical scala file using an implicit class. Is these a way to do it in sbt ?
Yes, it's possible. create object(SbtProjectImplicits.scala) under the project directory(depend on your project structure), like:
your-project/
project/SbtProjectImplicits.scala
src/
...
and the SbtProjectImplicits.scala object content maybe like:
object SbtProjectImplicits {
implicit class ProjectSettings(p: sbt.Project) {
def assembly(className: Class, jarName): sbt.Project = {
p.settings(
mainClass in Compile := Some(mainClassName),
assemblyJarName in assembly := jarName,
...
)
p
}
}
}
so you can in build.sbt do it like:
import SbtProjectImplicits._
project
.assembly(className, jarName)
Being new to sbt and the sbt-assembly plugin I am confused about how one deals with builds involving different class definitions within dependencies I am trying to package.
[error] (*:assembly) deduplicate: different file contents found in the following:
[error] /Users/dm/.ivy2/cache/org.apache.tika/tika-app/jars/tika-app-1.3.jar:javax/xml/XMLConstants.class
[error] /Users/dm/.ivy2/cache/stax/stax-api/jars/stax-api-1.0.1.jar:javax/xml/XMLConstants.class
[error] /Users/dm/.ivy2/cache/xml-apis/xml-apis/jars/xml-apis-1.3.03.jar:javax/xml/XMLConstants.class
I've added:
mergeStrategy in assembly <<= (mergeStrategy in assembly) { (old) =>
{
case PathList("javax", "xml", xs # _*) => MergeStrategy.first
}
}
to my build.sbt file, but I'm still getting the error above (regardless of whether or not it's in the build file). Any guidance would be greatly appreciated.
Thanks,
Don
I think you're close. Make sure that you add any rewiring after assemblySettings are loaded, and also pass any patterns you're not handling to the default strategy:
assemblySettings
mergeStrategy in assembly <<= (mergeStrategy in assembly) { (old) =>
{
case PathList("javax", "xml", xs # _*) => MergeStrategy.first
case _ => old
}
}
Just an update—with current sbt (0.13.8) and sbt-assembly (0.13.0) versions, Eugene's code becomes:
assemblyMergeStrategy in assembly := {
case PathList("javax", "xml", xs # _*) => MergeStrategy.first
case x =>
val oldStrategy = (assemblyMergeStrategy in assembly).value
oldStrategy(x)
}
I am trying to convert a scala project into a deployable fat jar using sbt-assembly. When I run my assembly task in sbt I am getting the following error:
Merging 'org/apache/commons/logging/impl/SimpleLog.class' with strategy 'deduplicate'
:assembly: deduplicate: different file contents found in the following:
[error] /Users/home/.ivy2/cache/commons-logging/commons-logging/jars/commons-logging-1.1.1.jar:org/apache/commons/logging/impl/SimpleLog.class
[error] /Users/home/.ivy2/cache/org.slf4j/jcl-over-slf4j/jars/jcl-over-slf4j-1.6.4.jar:org/apache/commons/logging/impl/SimpleLog.class
Now from the sbt-assembly documentation:
If multiple files share the same relative path (e.g. a resource named
application.conf in multiple dependency JARs), the default strategy is
to verify that all candidates have the same contents and error out
otherwise. This behavior can be configured on a per-path basis using
either one of the following built-in strategies or writing a custom one:
MergeStrategy.deduplicate is the default described above
MergeStrategy.first picks the first of the matching files in classpath order
MergeStrategy.last picks the last one
MergeStrategy.singleOrError bails out with an error message on conflict
MergeStrategy.concat simply concatenates all matching files and includes the result
MergeStrategy.filterDistinctLines also concatenates, but leaves out duplicates along the way
MergeStrategy.rename renames the files originating from jar files
MergeStrategy.discard simply discards matching files
Going by this I setup my build.sbt as follows:
import sbt._
import Keys._
import sbtassembly.Plugin._
import AssemblyKeys._
name := "my-project"
version := "0.1"
scalaVersion := "2.9.2"
crossScalaVersions := Seq("2.9.1","2.9.2")
//assemblySettings
seq(assemblySettings: _*)
resolvers ++= Seq(
"Typesafe Releases Repository" at "http://repo.typesafe.com/typesafe/releases/",
"Typesafe Snapshots Repository" at "http://repo.typesafe.com/typesafe/snapshots/",
"Sonatype Repository" at "http://oss.sonatype.org/content/repositories/releases/"
)
libraryDependencies ++= Seq(
"org.scalatest" %% "scalatest" % "1.6.1" % "test",
"org.clapper" %% "grizzled-slf4j" % "0.6.10",
"org.scalaz" % "scalaz-core_2.9.2" % "7.0.0-M7",
"net.databinder.dispatch" %% "dispatch-core" % "0.9.5"
)
scalacOptions += "-deprecation"
mainClass in assembly := Some("com.my.main.class")
test in assembly := {}
mergeStrategy in assembly := mergeStrategy.first
In the last line of the build.sbt, I have:
mergeStrategy in assembly := mergeStrategy.first
Now, when I run SBT, I get the following error:
error: value first is not a member of sbt.SettingKey[String => sbtassembly.Plugin.MergeStrategy]
mergeStrategy in assembly := mergeStrategy.first
Can somebody point out what I might be doing wrong here?
Thanks
As for the current version 0.11.2 (2014-03-25), the way to define the merge strategy is different.
This is documented here, the relevant part is:
NOTE:
mergeStrategy in assembly expects a function, you can't do
mergeStrategy in assembly := MergeStrategy.first
The new way is (copied from the same source):
mergeStrategy in assembly <<= (mergeStrategy in assembly) { (old) =>
{
case PathList("javax", "servlet", xs # _*) => MergeStrategy.first
case PathList(ps # _*) if ps.last endsWith ".html" => MergeStrategy.first
case "application.conf" => MergeStrategy.concat
case "unwanted.txt" => MergeStrategy.discard
case x => old(x)
}
}
This is possibly applicable to earlier versions as well, I don't know exactly when it has changed.
I think it should be MergeStrategy.first with a capital M, so mergeStrategy in assembly := MergeStrategy.first.
this is the proper way to merge most of the common java/scala projects.
it takes care of META-INF and classes.
also the service registration in META-INF is taken care of.
assemblyMergeStrategy in assembly := {
case x if Assembly.isConfigFile(x) =>
MergeStrategy.concat
case PathList(ps # _*) if Assembly.isReadme(ps.last) || Assembly.isLicenseFile(ps.last) =>
MergeStrategy.rename
case PathList("META-INF", xs # _*) =>
(xs map {_.toLowerCase}) match {
case ("manifest.mf" :: Nil) | ("index.list" :: Nil) | ("dependencies" :: Nil) =>
MergeStrategy.discard
case ps # (x :: xs) if ps.last.endsWith(".sf") || ps.last.endsWith(".dsa") =>
MergeStrategy.discard
case "plexus" :: xs =>
MergeStrategy.discard
case "services" :: xs =>
MergeStrategy.filterDistinctLines
case ("spring.schemas" :: Nil) | ("spring.handlers" :: Nil) =>
MergeStrategy.filterDistinctLines
case _ => MergeStrategy.first
}
case _ => MergeStrategy.first}
I have just setup a little sbt project that needs to rewire some mergeStrategies, and found the answer a little outdated, let me add my working code for versions (as of 4-7-2015)
sbt 0.13.8
scala 2.11.6
assembly 0.13.0
mergeStrategy in assembly := {
case x if x.startsWith("META-INF") => MergeStrategy.discard // Bumf
case x if x.endsWith(".html") => MergeStrategy.discard // More bumf
case x if x.contains("slf4j-api") => MergeStrategy.last
case x if x.contains("org/cyberneko/html") => MergeStrategy.first
case PathList("com", "esotericsoftware", xs#_ *) => MergeStrategy.last // For Log$Logger.class
case x =>
val oldStrategy = (mergeStrategy in assembly).value
oldStrategy(x)
}
For the new sbt version (sbt-version :0.13.11), I was getting the error for slf4j; for the time being took the easy way out : Please also check the answer here Scala SBT Assembly cannot merge due to de-duplication error in StaticLoggerBinder.class where sbt-dependency-graph tool is mentioned which is pretty cool to do this manually
assemblyMergeStrategy in assembly <<= (assemblyMergeStrategy in assembly) {
(old) => {
case PathList("META-INF", xs # _*) => MergeStrategy.discard
case x => MergeStrategy.first
}
}
Quick update: mergeStrategy is deprecated. Use assemblyMergeStrategy. Apart from that, earlier responses are still solid
Add following to build.sbt to add kafka as source or destination
assemblyMergeStrategy in assembly := {
case PathList("META-INF", xs # _*) => MergeStrategy.discard
//To add Kafka as source
case "META-INF/services/org.apache.spark.sql.sources.DataSourceRegister" =>
MergeStrategy.concat
case x => MergeStrategy.first
}