scala 是 2.10.1 但 sbt 控制台不是? [英] scala is 2.10.1 but sbt console is not?

问题描述

我是 Scala/SBT 的新手，所以请保持温和，但我正在尝试通过 SBT入门"，我注意到我的 brew 安装的 scala 和 sbt 工具之间存在差异.当我直接启动 Scala 的 REPL 时，它报告自己为 Scala 2.10.1，这正是我所期望的.

I'm new to Scala/SBT, so please be gentle, but I'm trying to work my way through the SBT "Getting Started" and I noticed a discrepancy between my brew installed scala and sbt tools. When I launch the REPL for scala directly, it reports itself as Scala 2.10.1, which is what I would expect.

bobk-mbp:work bobk$ scala
Welcome to Scala version 2.10.1 (Java HotSpot(TM) 64-Bit Server VM, Java 1.7.0_17).
Type in expressions to have them evaluated.
Type :help for more information.

scala> :quit

当我通过 SBT 启动 REPL 时，REPL 断言它是 2.9.2?!?

When I launch the REPL through SBT, the REPL asserts it is 2.9.2?!?

bobk-mbp:work bobk$ sbt console
[info] Set current project to default-690573 (in build file:/Users/bobk/work/)
[info] Starting scala interpreter...
[info] 
Welcome to Scala version 2.9.2 (Java HotSpot(TM) 64-Bit Server VM, Java 1.7.0_17).
Type in expressions to have them evaluated.
Type :help for more information.

scala> :quit

这是怎么回事?我期待构建工具使用我的开发箱上托管的 scala 环境.它从哪里获得 2.9.2 以及如何让它使用 2.10.1?

What's up with that? I was expecting the build tool to use the scala environment that is hosted on my dev box. Where is it getting 2.9.2 and how do I get it to use the 2.10.1?

scala 和 sbt 都是通过 brew 安装的，但我认为这并不重要.sbt 版本好像是 0.12.3

Both scala and sbt were installed via brew, but I don't think that really matters. The sbt version appears to be 0.12.3

bobk-mbp:work bobk$ sbt --version
sbt launcher version 0.12.3

推荐答案

如果不带参数启动 sbt:

If you start sbt with no parameters:

sbt
> ++ 2.10.1
> console

应该为该会话提供 Scala 2.10.1.我不知道如何在不重建 sbt 本身的情况下使其成为所有 sbt 会话的默认值.

should give you Scala 2.10.1 for that session. I don't know how to make it the default for all sbt sessions without rebuilding sbt itself.

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