为子项目使用不同的 crossScalaVersions 交叉编译聚合项目 [英] Cross-compiling aggregate projects with different crossScalaVersions for subprojects

问题描述

我们有一个项目，其中有几个子项目可以在 Scala 2.10 和 2.11 下编译，一个子项目只能在 2.10 下编译(实际上是 Scala-Virtualized 2.10.2)，一个子项目只能在 2.11 下编译.有没有一种简单的方法来创建一个聚合项目，它可以为 2.10 和 2.11 交叉构建所有可能的子项目?或者，为 2.10 和 2.11 设置不同的默认项目?

We have a project with several subprojects which can compile under both Scala 2.10 and 2.11, one subproject which only compiles under 2.10 (actually, Scala-Virtualized 2.10.2) and one subproject which only compiles under 2.11. Is there a simple way to create an aggregate project which cross-builds all possible subprojects for both 2.10 and 2.11? Or, alternately, to have different default projects for 2.10 and 2.11?

特别是 这里是当前的 Build.scala.如果我将 lmsBackend 添加到 root，我会得到

In particular, here is current Build.scala. If I add lmsBackend to root, I get

> show scalaVersion
[info] common/*:scalaVersion
[info]  2.10.4
[info] lms-backend/*:scalaVersion
[info]  2.10.2
[info] meta/*:scalaVersion
[info]  2.10.4
[info] community-edition/*:scalaVersion
[info]  2.10.4
[info] core/*:scalaVersion
[info]  2.10.4
[info] scalan/*:scalaVersion
[info]  2.10.4
> show crossScalaVersions
[info] common/*:crossScalaVersions
[info]  List(2.10.4, 2.11.5)
[info] lms-backend/*:crossScalaVersions
[info]  List(2.10.2)
[info] meta/*:crossScalaVersions
[info]  List(2.10.4, 2.11.5)
[info] community-edition/*:crossScalaVersions
[info]  List(2.10.4, 2.11.5)
[info] core/*:crossScalaVersions
[info]  List(2.10.4, 2.11.5)
[info] scalan/*:crossScalaVersions
[info]  List(2.10.4, 2.11.5)

SBT 能够在这个聚合项目上很好地运行 update、compile 等.但是，一旦我尝试任何交叉构建，事情就会中断:

SBT is able to run update, compile, etc. fine on this aggregate project. However, once I try any cross-building, things break:

> +update
[info] Setting version to 2.10.4
[info] Reapplying settings...
[info] Set current project to scalan (in build file:/home/aromanov/IdeaProjects/scalan-lite/)
...
[info] Updating {file:/home/aromanov/IdeaProjects/scalan-lite/}lms-backend...
[info] Resolving org.scala-lang.virtualized#scala-library;2.10.4 ...
[warn]  module not found: org.scala-lang.virtualized#scala-library;2.10.4
...
[info] Resolving org.scala-lang.virtualized#scala-compiler;2.10.4 ...
[warn]  module not found: org.scala-lang.virtualized#scala-compiler;2.10.4
...
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn]  ::          UNRESOLVED DEPENDENCIES         ::
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn]  :: org.scala-lang.virtualized#scala-library;2.10.4: not found
[warn]  :: org.scala-lang.virtualized#scala-compiler;2.10.4: not found
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn] 
[warn]  Note: Unresolved dependencies path:
[warn]      org.scala-lang.virtualized:scala-library:2.10.4 ((sbt.Classpaths) Defaults.scala#L1169)
[warn]        +- com.huawei.scalan:lms-backend_2.10:0.2.6-SNAPSHOT
[warn]      org.scala-lang.virtualized:scala-compiler:2.10.4
[warn]        +- com.huawei.scalan:lms-backend_2.10:0.2.6-SNAPSHOT
[trace] Stack trace suppressed: run last lms-backend/*:update for the full output.
[error] (lms-backend/*:update) sbt.ResolveException: unresolved dependency: org.scala-lang.virtualized#scala-library;2.10.4: not found
[error] unresolved dependency: org.scala-lang.virtualized#scala-compiler;2.10.4: not found
[error] Total time: 2 s, completed Jan 28, 2015 1:33:49 PM

show scalaVersion 现在显示所有子项目的 2.10.4.有没有办法在聚合项目中包含 lms-backend 并且仍然避免这个问题?

show scalaVersion now shows 2.10.4 for all subprojects. Is there any way to include lms-backend in the aggregate project and still avoid this problem?

推荐答案

我有一个 类似问题.我的问题还有类路径依赖项(dependsOn)的额外复杂性，而不仅仅是聚合，但我的问题的一种解决方案很好地解决了这个问题.

I had a similar question. My question had an additional complication of classpath dependencies (dependsOn), rather than just aggregation, but one solution for my problem fixes this one quite well.

sbt-doge，一个看似可爱的 GitHub 项目，取代了 的实现+ 及其可互换的前缀之一:much, so, such, very.

sbt-doge, a deceptively cutesy GitHub project, replaces the implementation of + with one of its interchangeable prefixes: much, so, such, very.

当前实现的 + 交叉构建运算符没有考虑子项目的 crossScalaVersions.在修复之前，这里是它的替代实现.

Current implementation of + cross building operator does not take in account for the crossScalaVersions of the sub projects. Until that's fixed, here's an alternative implementation of it.

项目的创建者是 SBT 的主要贡献者之一.

The creator of the project is one of the main contributors to SBT.

添加

addSbtPlugin("com.eed3si9n" % "sbt-doge" % "0.1.3")

到 project/plugins.sbt.

然后

> very compile

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