在构建胖项目的同时忽略子项目JAR的根项目

Question

我有一个根项目，我想用sbt-assembly构建一个胖JAR。它有一个子项目，它依赖于我想为胖JAR忽略的根目录（就像它不存在一样）。我该怎么做呢？

基本上我想根项目包好像有从build.sbt没有localMode子项目中尝试的1

尝试1

我build.sbt是

import sbt.Keys._ 

name := "myprojectname" 
version := "0.0.1-SNAPSHOT" 
scalaVersion in ThisBuild := "2.11.8" 

mainClass in(Compile, run) := Some("com.mywebsite.MyExample") 
mainClass in(Compile, packageBin) := Some("com.mywebsite.MyExample") 
mainClass in assembly := Some("com.mywebsite.MyExample") 

libraryDependencies += "org.apache.spark" %% "spark-core" % "2.0.0" % Provided 
libraryDependencies += "org.scalatest" %% "scalatest" % "3.0.0" % Test 

lazy val localMode = project. 
    in(file("localMode")). 
    dependsOn(RootProject(file("."))). 
    settings(
    name := "myprojectname_local", 
    libraryDependencies += "org.apache.spark" %% "spark-core" % "2.0.0" % Compile, 
    mainClass in(Compile, run) := Some("com.mywebsite.MyExample"), 
    mainClass in(Compile, packageBin) := Some("com.mywebsite.MyExample") 
) 

fullClasspath in assembly := { 
    (fullClasspath in assembly).value diff 
    (fullClasspath in assembly in localMode).value 
} 

目前我得到的错误消息：

[error] (localMode/*:assembly) deduplicate: different file contents found in the following: 
[error] ~/.ivy2/cache/org.sonatype.sisu/sisu-guice/jars/sisu-guice-2.1.7-noaop.jar:com/google/inject/AbstractModule.class 
[error] ~/.ivy2/cache/com.google.inject/guice/jars/guice-3.0.jar:com/google/inject/AbstractModule.class 
[error] deduplicate: different file contents found in the following: 
[error] ~/.ivy2/cache/org.sonatype.sisu/sisu-guice/jars/sisu-guice-2.1.7-noaop.jar:com/google/inject/Binder.class 
[error] ~/.ivy2/cache/com.google.inject/guice/jars/guice-3.0.jar:com/google/inject/Binder.class 
[error] deduplicate: different file contents found in the following: 
[error] ~/.ivy2/cache/org.sonatype.sisu/sisu-guice/jars/sisu-guice-2.1.7-noaop.jar:com/google/inject/ConfigurationException.class 
[error] ~/.ivy2/cache/com.google.inject/guice/jars/guice-3.0.jar:com/google/inject/ConfigurationException.class 

and so on... 

如果我命令sbt root/assembly我得到

[error] Expected ID character 
[error] Not a valid command: root (similar: reboot, boot, project) 
[error] Expected project ID 
[error] Expected configuration 
[error] Expected ':' (if selecting a configuration) 
[error] Expected key 
[error] Not a valid key: root (similar: products) 
[error] root/assembly 
[error] ^

尝试2

我的第二个build.sbt不能编译：

import sbt.Keys._ 

lazy val commonSettings = Seq(
    version := "0.0.1-SNAPSHOT", 
    scalaVersion in ThisBuild := "2.11.8", 
    mainClass in(Compile, run) := Some("com.mywebsite.MyExample"), 
    mainClass in(Compile, packageBin) := Some("com.mywebsite.MyExample"), 
    libraryDependencies += "org.scalatest" %% "scalatest" % "3.0.0" % Test 
) 

lazy val root = project. 
    in(file("root")). 
    dependsOn(RootProject(file("."))). 
    settings(
    name := "myprojectname", 
    libraryDependencies += "org.apache.spark" %% "spark-core" % "2.0.0" % Provided, 
    mainClass in assembly := Some("com.mywebsite.MyExample") 
) 

lazy val localMode = project. 
    in(file("localMode")). 
    dependsOn(RootProject(file("."))). 
    settings(
    name := "myprojectname_local", 
    libraryDependencies += "org.apache.spark" %% "spark-core" % "2.0.0" % Compile 
) 

Answer 1

我想你可以用assembly::fullClasspath设置做到这一点。通过default它被设置为fullClasspath or (fullClasspath in Runtime)。所以，可能是你可以做这样的事情：

fullClasspath in assembly := { 
    (fullClasspath in assembly).value diff 
    (fullClasspath in assembly in localMode).value 
} 

在没有关于你的具体项目配置的详细信息，我想localMode是要排除的子项目的名称。

UPDATE

有一些问题，在你尝试2 build.sbt： - 你不给你的项目 添加常用设置 - “根”是一个在的，好了，根你的项目目录（即in file(".")） - 如果你明确地定义root项目，另外一个应该依赖于它，而不是RootProject，这仅仅是一个参考的“含蓄”定义根项目

import sbt.Keys._ 

lazy val commonSettings = Seq(
    version := "0.0.1-SNAPSHOT", 
    scalaVersion in ThisBuild := "2.11.8", 
    mainClass in(Compile, run) := Some("com.mywebsite.MyExample"), 
    mainClass in(Compile, packageBin) := Some("com.mywebsite.MyExample"), 
    libraryDependencies += "org.scalatest" %% "scalatest" % "3.0.0" % Test 
) 

lazy val root = project.in(file(".")). 
    settings(commonSettings: _*). 
    settings(
    name := "myprojectname", 
    libraryDependencies += "org.apache.spark" %% "spark-core" % "2.0.0" % Provided, 
    mainClass in assembly := Some("com.mywebsite.MyExample") 
) 

lazy val localMode = project. // by default the name of the project val is the name of its base directory 
    dependsOn(root). 
    settings(commonSettings: _*). 
    settings(
    name := "myprojectname_local", 
    libraryDependencies += "org.apache.spark" %% "spark-core" % "2.0.0" % Compile 
) 

方式

检查Multi-project builds上的sbt文档。对于您关于root项目的问题，有一章叫做Default root project。现在有了这些修复程序，root/assembly是否按预期工作？

Answer 2

尝试把

aggregate in (Compile, assembly) := false