尝试交叉编译项目到Scala 2.11失败,同时加载对象时出错,编译器镜

发布时间：2020-12-16 09:12:58 所属栏目：安全来源：网络整理

导读：我正在尝试将我的项目编译到 Scala 2.10和2.11,以便我可以发布两个scala版本的版本,但是每次尝试执行此操作都会失败,并显示以下消息： #( 04/26/14@ 7:40 )( mauricio@Mauricios-MacBook-Pro ):~/projects/scala/postgresql-netty@scala-2.11? sbt compile[i

我正在尝试将我的项目编译到 Scala 2.10和2.11,以便我可以发布两个scala版本的版本,但是每次尝试执行此操作都会失败,并显示以下消息：

#( 04/26/14@ 7:40 )( mauricio@Mauricios-MacBook-Pro ):~/projects/scala/postgresql-netty@scala-2.11?
   sbt compile
[info] Loading project definition from /Users/mauricio/projects/scala/postgresql-netty/project
[info] Set current project to db-async-base (in build file:/Users/mauricio/projects/scala/postgresql-netty/)
[info] Compiling 61 Scala sources and 1 Java source to /Users/mauricio/projects/scala/postgresql-netty/db-async-common/target/scala-2.11/classes...
[error] error while loading Object,Missing dependency 'object scala in compiler mirror',required by /Library/Java/JavaVirtualMachines/jdk1.7.0_45.jdk/Contents/Home/jre/lib/rt.jar(java/lang/Object.class)
scala.reflect.internal.MissingRequirementError: object scala in compiler mirror not found.
    at scala.reflect.internal.MissingRequirementError$.signal(MissingRequirementError.scala:17)
    at scala.reflect.internal.MissingRequirementError$.notFound(MissingRequirementError.scala:18)
    at scala.reflect.internal.Mirrors$RootsBase.getModuleOrClass(Mirrors.scala:53)
    at scala.reflect.internal.Mirrors$RootsBase.getModuleOrClass(Mirrors.scala:66)
    at scala.reflect.internal.Mirrors$RootsBase.getPackage(Mirrors.scala:173)
    at scala.reflect.internal.Definitions$DefinitionsClass.ScalaPackage$lzycompute(Definitions.scala:161)
    at scala.reflect.internal.Definitions$DefinitionsClass.ScalaPackage(Definitions.scala:161)
    at scala.reflect.internal.Definitions$DefinitionsClass.ScalaPackageClass$lzycompute(Definitions.scala:162)
    at scala.reflect.internal.Definitions$DefinitionsClass.ScalaPackageClass(Definitions.scala:162)
    at scala.reflect.internal.Definitions$DefinitionsClass.init(Definitions.scala:1375)
    at scala.tools.nsc.Global$Run.<init>(Global.scala:1278)
    at xsbt.CachedCompiler0$$anon$2.<init>(CompilerInterface.scala:113)
    at xsbt.CachedCompiler0.run(CompilerInterface.scala:113)
    at xsbt.CachedCompiler0.run(CompilerInterface.scala:99)
    at xsbt.CompilerInterface.run(CompilerInterface.scala:27)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at sbt.compiler.AnalyzingCompiler.call(AnalyzingCompiler.scala:102)
    at sbt.compiler.AnalyzingCompiler.compile(AnalyzingCompiler.scala:48)
    at sbt.compiler.AnalyzingCompiler.compile(AnalyzingCompiler.scala:41)
    at sbt.compiler.AggressiveCompile$$anonfun$3$$anonfun$compileScala$1$1.apply$mcV$sp(AggressiveCompile.scala:99)
    at sbt.compiler.AggressiveCompile$$anonfun$3$$anonfun$compileScala$1$1.apply(AggressiveCompile.scala:99)
    at sbt.compiler.AggressiveCompile$$anonfun$3$$anonfun$compileScala$1$1.apply(AggressiveCompile.scala:99)
    at sbt.compiler.AggressiveCompile.sbt$compiler$AggressiveCompile$$timed(AggressiveCompile.scala:166)
    at sbt.compiler.AggressiveCompile$$anonfun$3.compileScala$1(AggressiveCompile.scala:98)
    at sbt.compiler.AggressiveCompile$$anonfun$3.apply(AggressiveCompile.scala:143)
    at sbt.compiler.AggressiveCompile$$anonfun$3.apply(AggressiveCompile.scala:87)
    at sbt.inc.IncrementalCompile$$anonfun$doCompile$1.apply(Compile.scala:39)
    at sbt.inc.IncrementalCompile$$anonfun$doCompile$1.apply(Compile.scala:37)
    at sbt.inc.IncrementalCommon.cycle(Incremental.scala:99)
    at sbt.inc.Incremental$$anonfun$1.apply(Incremental.scala:38)
    at sbt.inc.Incremental$$anonfun$1.apply(Incremental.scala:37)
    at sbt.inc.Incremental$.manageClassfiles(Incremental.scala:65)
    at sbt.inc.Incremental$.compile(Incremental.scala:37)
    at sbt.inc.IncrementalCompile$.apply(Compile.scala:27)
    at sbt.compiler.AggressiveCompile.compile2(AggressiveCompile.scala:157)
    at sbt.compiler.AggressiveCompile.compile1(AggressiveCompile.scala:71)
    at sbt.compiler.AggressiveCompile.apply(AggressiveCompile.scala:46)
    at sbt.Compiler$.apply(Compiler.scala:75)
    at sbt.Compiler$.apply(Compiler.scala:66)
    at sbt.Defaults$.sbt$Defaults$$compileTaskImpl(Defaults.scala:743)
    at sbt.Defaults$$anonfun$compileTask$1.apply(Defaults.scala:735)
    at sbt.Defaults$$anonfun$compileTask$1.apply(Defaults.scala:735)
    at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47)
    at sbt.$tilde$greater$$anonfun$$u2219$1.apply(TypeFunctions.scala:42)
    at sbt.std.Transform$$anon$4.work(System.scala:64)
    at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:237)
    at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:237)
    at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:18)
    at sbt.Execute.work(Execute.scala:244)
    at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:237)
    at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:237)
    at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:160)
    at sbt.CompletionService$$anon$2.call(CompletionService.scala:30)
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:744)
[error] (db-async-common/compile:compile) scala.reflect.internal.MissingRequirementError: object scala in compiler mirror not found.
[error] Total time: 2 s,completed Apr 26,2014 7:43:49 PM

我的构建文件如下所示：

import sbt._
import Keys._

object ProjectBuild extends Build {

  val commonName = "db-async-common"
  val postgresqlName = "postgresql-async"
  val mysqlName = "mysql-async"

  lazy val root = Project(
    id = "db-async-base",base = file("."),settings = Configuration.baseSettings,aggregate = Seq(common,postgresql,mysql)
  )

  lazy val common = Project(
    id = commonName,base = file(commonName),settings = Configuration.baseSettings ++ Seq(
      name := commonName,libraryDependencies := Configuration.commonDependencies
    )
  )

  lazy val postgresql = Project(
    id = postgresqlName,base = file(postgresqlName),settings = Configuration.baseSettings ++ Seq(
      name := postgresqlName,libraryDependencies ++= Configuration.implementationDependencies
    )
  ) aggregate (common) dependsOn (common)

  lazy val mysql = Project(
    id = mysqlName,base = file(mysqlName),settings = Configuration.baseSettings ++ Seq(
      name := mysqlName,libraryDependencies ++= Configuration.implementationDependencies
    )
  ) aggregate (common) dependsOn (common)

}

object Configuration {

  val commonVersion = "0.2.13"
  val projectScalaVersion = "2.11.0"

  val specs2Dependency = "org.specs2" %% "specs2" % "2.3.11" % "test"
  val logbackDependency = "ch.qos.logback" % "logback-classic" % "1.0.13" % "test"

  val commonDependencies = Seq(
    "org.slf4j" % "slf4j-api" % "1.7.5","joda-time" % "joda-time" % "2.3","org.joda" % "joda-convert" % "1.5","io.netty" % "netty-all" % "4.0.18.Final","org.javassist" % "javassist" % "3.18.1-GA",specs2Dependency,logbackDependency
  )

  val implementationDependencies = Seq(
    specs2Dependency,logbackDependency
  )

  val baseSettings = Defaults.defaultSettings ++ Seq(
    scalacOptions :=
      Opts.compile.encoding("UTF8")
        :+ Opts.compile.deprecation
        :+ Opts.compile.unchecked
        :+ "-feature",scalacOptions in doc := Seq("-doc-external-doc:scala=http://www.scala-lang.org/archives/downloads/distrib/files/nightly/docs/library/"),scalaVersion := projectScalaVersion,crossScalaVersions := Seq(projectScalaVersion,"2.10.4"),javacOptions := Seq("-source","1.6","-target","-encoding","UTF8"),organization := "com.github.mauricio",version := commonVersion,parallelExecution := false,publishArtifact in Test := false,publishMavenStyle := true,pomIncludeRepository := {
      _ => false
    },publishTo <<= version {
      v: String =>
        val nexus = "https://oss.sonatype.org/"
        if (v.trim.endsWith("SNAPSHOT"))
          Some("snapshots" at nexus + "content/repositories/snapshots")
        else
          Some("releases" at nexus + "service/local/staging/deploy/maven2")
    },pomExtra := (
      <url>https://github.com/mauricio/postgresql-async</url>
        <licenses>
          <license>
            <name>APACHE-2.0</name>
            <url>http://www.apache.org/licenses/LICENSE-2.0</url>
            <distribution>repo</distribution>
          </license>
        </licenses>
        <scm>
          <url>git@github.com:mauricio/postgresql-netty.git</url>
          <connection>scm:git:git@github.com:mauricio/postgresql-netty.git</connection>
        </scm>
        <developers>
          <developer>
            <id>mauricio</id>
            <name>Maurício Linhares</name>
            <url>https://github.com/mauricio</url>
          </developer>
        </developers>
      )
  )

}

而如果你想提取来源来检查它是否为at this branch on Github.

任何关于尝试解决这个问题的信息将是非常有帮助的.

解决方法

问题很简单,在你的Build.scala中,你几乎没事,但是在commons项目中你已经覆盖了默认的commonDependencies.默认情况下它包含对scala-library的依赖.

这段代码

lazy val common = Project(
    id = commonName,libraryDependencies := Configuration.commonDependencies // #1
    )
  )

标记为#1的元素应该有

libraryDependencies ++= Configuration.commonDependencies

PS.我已经通过修复发送了一个拉请求.

（编辑：李大同）

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