sbt约为0.13.15，而我已安装sbt 1.0.4

Question

Hi新手到sbt我已经安装sbt表单在这里https://www.scala-sbt.org/download.html (windows sbt-1.0.4.msi)，然后我做sbt about它产生

C:\Users\rajnish.kumar>sbt about
"C:\Users\rajnish.kumar\.sbt\preloaded\org.scala-sbt\sbt\"1.0.4"\jars\sbt.jar"
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=256m; support was removed in 8.0
[warn] Executing in batch mode.
[warn]   For better performance, hit [ENTER] to switch to interactive mode, or
[warn]   consider launching sbt without any commands, or explicitly passing 'shell'
[info] Loading project definition from C:\Users\rajnish.kumar\project
[info] Set current project to rajnish-kumar (in build file:/C:/Users/rajnish.kumar/)
[info] This is sbt 0.13.15
[info] The current project is {file:/C:/Users/rajnish.kumar/}rajnish-kumar 0.1-SNAPSHOT
[info] The current project is built against Scala 2.10.6
[info] Available Plugins: sbt.plugins.IvyPlugin, sbt.plugins.JvmPlugin, sbt.plugins.CorePlugin, sbt.plugins.JUnitXmlReportPlugin, sbt.plugins.Giter8TemplatePlugin
[info] sbt, sbt plugins, and build definitions are using Scala 2.10.6

问题是为什么它打印的是sbt版本0.13.15而不是1.0.4？我用的是windows8。

hi在Windows10上尝试了同样的方法，并获得了预期的结果

C:\Users\rajnish>sbt about
"C:\Users\rajnish\.sbt\preloaded\org.scala-sbt\sbt\"1.0.4"\jars\sbt.jar"
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=256m; support was removed in 8.0
[info] Loading project definition from C:\Users\rajnish\project
[info] Set current project to rajnish (in build file:/C:/Users/rajnish/)
[info] This is sbt 1.0.4
[info] The current project is {file:/C:/Users/rajnish/}rajnish 0.1-SNAPSHOT
[info] The current project is built against Scala 2.12.4
[info] Available Plugins: sbt.plugins.IvyPlugin, sbt.plugins.JvmPlugin, sbt.plugins.CorePlugin, sbt.plugins.JUnitXmlReportPlugin, sbt.plugins.Giter8TemplatePlugin
[info] sbt, sbt plugins, and build definitions are using Scala 2.12.4

Answer 1

为了在构建项目时真正执行SBT版本，您应该在project/build.properties文件中指定此版本。以下是我的项目中此文件的内容：

sbt.version = 1.0.4

如果我导航到根项目文件夹并运行sbt about，它会显示

[info] This is sbt 1.0.4
[info] The current project is {file:/ssd2/projects/ADMP/}admp 1.0
[info] The current project is built against Scala 2.11.9

如果我将build.properties中的版本更改为

sbt.version = 1.0.1

然后运行sbt about，它显示给我

[info] This is sbt 1.0.1
[info] The current project is {file:/ssd2/projects/ADMP/}admp 1.0
[info] The current project is built against Scala 2.11.9

SBT知道如何加载特定版本的源代码，如果当前版本的SBT不同，则加载它们，编译该版本的SBT，然后使用该版本的SBT构建您的项目。

为什么在你的情况下默认显示0.13.15 -我不确定。可能在您的项目中，您在build.properties中指定了该版本，可能是出于某些其他原因。

也可以尝试使用sbtVersion任务的帮助进行检查。运行命令sbt sbtVersion。

Answer 2

对我来说，它的安装并不是很干净。为了解决这个问题，我已经完成了以下步骤：

1. 从程序文件中手动删除sbt安装目录。
2. 使用添加删除程序删除sbt目录。
3. 安装sbt新版本。
4. 交叉检查环境变量e.g.SBT_HOME和path
5. 运行sbt sbtVersion以验证新安装的版本。