在为sbt 0.13构建插件时,重要的是scala 2.10的哪个版本的库依赖项(插件的)是针对什么构建的？
目前我的插件依赖于针对scala 2.10.2构建的库.这适用于单个构建,但是当构建(A)依赖于另一个构建(B)时,通过ProjectRef,我发现项目B中构建指令的sbt编译失败.似乎sbt正在使用2.10.2来构建指令文件,但是scala-reflect-2.10.0.jar正在加载(从sbt调试回溯,在Calling Scala compiler with arguments (CompilerInterface)打印到屏幕之后).
如果我自己构建引用的项目(B),指令文件的构建成功,但再次查看正在加载的jar,我看到它scala-2.10.2/lib/scala-reflect.jar被引用.
失败时的错误消息是:
[error] error while loading MacroValue, Missing dependency 'bad symbolic reference. A signature in MacroValue.class refers to term annotations
[error] in package scala.reflect.internal which is not available.
[error] It may be completely missing from the current classpath, or the version on
[error] the classpath might be incompatible with the version used when compiling MacroValue.class.', required by /home/alex.wilson/.ivy2/cache/org.scala-sbt/main-settings/jars/main-settings-0.13.0.jar(sbt/std/MacroValue.class)
[error] error while loading InputEvaluated, Missing dependency 'bad symbolic reference. A signature in InputEvaluated.class refers to term annotations
[error] in package scala.reflect.internal which is not available.
[error] It may be completely missing from the current classpath, or the version on
[error] the classpath might be incompatible with the version used when compiling InputEvaluated.class.', required by /home/alex.wilson/.ivy2/cache/org.scala-sbt/main-settings/jars/main-settings-0.13.0.jar(sbt/std/InputEvaluated.class)
[error] error while loading ParserInput, Missing dependency 'bad symbolic reference. A signature in ParserInput.class refers to term annotations
[error] in package scala.reflect.internal which is not available.
[error] It may be completely missing from the current classpath, or the version on
[error] the classpath might be incompatible with the version used when compiling ParserInput.class.', required by /home/alex.wilson/.ivy2/cache/org.scala-sbt/main-settings/jars/main-settings-0.13.0.jar(sbt/std/ParserInput.class)
[error] three errors found
我可以重建我的插件,以便它依赖于根据需要构建的2.10.0库.但我不确定这是否是正确的方法并且会有所帮助.任何建议将不胜感激.
sbt 0.13.0 需要 Scala 2.10.2 或更高版本。该错误消息表明缺少 2.10.2 中引入的类。因此，正如您提到的，类路径似乎包含较旧的 Scala 版本。一般来说，如果您不设置scalaVersion，正确版本的 Scala 应该包含在 sbt 插件的类路径中。