sbt 控制台如何更新到最新的 Scala 版本？

Question

我已经按照 Installing sbt on Linux 中的说明安装了 sbt。

$ sbt --version
sbt launcher version **0.13.8**

$ sbt console
[info] Starting scala interpreter...
[info] 
Welcome to Scala version 2.10.4 (OpenJDK 64-Bit Server VM, Java 1.7.0_79).

如何配置（或更新）sbt 以便 sbt console 使用最新的 Scala 版本 2.11.6?

Answer 1

创建一个build.sbt文件并输入scalaVersion:

scalaVersion := "2.11.5"

运行 sbt console 与您的 build.sbt 在同一目录中，它将加载您指定的版本。

...:sbttest/ $ sbt console                                                                                                                                                                                                    [10:55:53]
[info] Loading global plugins from /home/.../.sbt/0.13/plugins
[info] Set current project to sbttest (in build file:/tmp/sbttest/)
[info] Starting scala interpreter...
[info] 
Welcome to Scala version 2.11.5 (OpenJDK 64-Bit Server VM, Java 1.7.0_79).
Type in expressions to have them evaluated.
Type :help for more information.

scala>

Answer 2

Run sbt console in the same directory with your build.sbt and it will load the version you specified.

您也可以将 build.sbt 文件放在 .sbt/0.13/ 目录中：

cat <<END > ~/.sbt/0.13/build.sbt
scalaVersion := "2.11.8"
END

然后，从其他任何地方执行 sbt console 将得到您最喜欢的 scala 版本。（如果您执行 sbt 的目录中有本地 build.sbt 文件，则本地指定的版本将覆盖全局）。

Answer 3

sbt ++ 2.11.11 console

将 2.11.11 更改为您选择的 Scala 版本。

来自sbt help ++：

++ <scala-version> [<command>]
    Changes the Scala version and runs a command.

    Sets the `scalaVersion` of all projects to <scala-version> and 
    reloads the build.
    If <command> is provided, it is then executed.

++ [<scala-version>=]<scala-home> [<command>]
    Uses the Scala installation at <scala-home> by configuring the 
    scalaHome setting for
    all projects.

    If <scala-version> is specified, it is used as the value of the 
    scalaVersion setting.
    This is important when using managed dependencies.  This version 
    will determine the
    cross-version used as well as transitive dependencies.

    If <command> is provided, it is then executed.

    See also `help +`

sbt 控制台如何更新到最新的 Scala 版本？

sbt console how to update to latest Scala version?

sbt