我正在尝试将我的项目编译为Scala 2.10和2.11，以便我可以为两个scala版本发布版本，但每次尝试执行此操作时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", "1.6", "-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>
)
)
}
如果您想提取来源以查看at this branch on Github。
有关尝试修复此问题的任何信息都会非常有用。
答案 0 :(得分：16)
问题非常简单，在你的Build.scala中，你几乎可以做得很好，但在公共项目中你已经覆盖了默认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,
base = file(commonName),
settings = Configuration.baseSettings ++ Seq(
name := commonName,
libraryDependencies := Configuration.commonDependencies // #1
)
)
标记为#1的元素应该
libraryDependencies ++= Configuration.commonDependencies
聚苯乙烯。我已经通过修复程序向您发送了拉取请求。
答案 1 :(得分：8)
尝试在sbt上使用Ubuntu上的Oracle Java 9 jvm时出现此错误。但是，使用Java 8 jvm对我有用。
答案 2 :(得分：3)
我认为你在问题Multimodule project build with SBT breaks with weird error
之前回答了在此版本中添加一行"org.scala-lang" % "scala-library" % projectScalaVersion,：
val commonDependencies = Seq(
..
"org.joda" % "joda-convert" % "1.5",
"org.scala-lang" % "scala-library" % projectScalaVersion,
"io.netty" % "netty-all" % "4.0.18.Final",
...
)
答案 3 :(得分：2)
在Build.scala我会添加autoScalaLibrary := true：
lazy val common = Project(
id = commonName,
base = file(commonName),
settings = Configuration.baseSettings ++ Seq(
...
autoScalaLibrary := true,
...
)
)
答案 4 :(得分：-2)
当使用intellij时，通过关闭项目并重新导入它，并在设置中选择sbt作为构建系统，这个问题得到了解决。
为什么我为什么选择SBT？现在我陷入了一个非常脆弱的构建系统。感谢上帝，至少intellij做对了。
sbt版本：0.13.15
scala版本：2.12.1