我可以从代码访问我的 Scala 应用程序的名称和版本（在 SBT 中设置）吗？

Can I access my Scala app's name and version (as set in SBT) from code?

提问by Alex Dean

I am building an app with SBT (0.11.0) using a Scala build definition like so:

我正在使用 Scala 构建定义构建一个带有 SBT (0.11.0) 的应用程序，如下所示：

object MyAppBuild extends Build {

  import Dependencies._

  lazy val basicSettings = Seq[Setting[_]](
    organization  := "com.my",
    version       := "0.1",
    description   := "Blah",
    scalaVersion  := "2.9.1",
    scalacOptions := Seq("-deprecation", "-encoding", "utf8"),
    resolvers     ++= Dependencies.resolutionRepos
  )

  lazy val myAppProject = Project("my-app-name", file("."))
    .settings(basicSettings: _*)
    [...]

I'm packaging a .jar at the end of the process.

我在过程结束时打包了一个 .jar。

My question is a simple one: is there a way of accessing the application's name ("my-app-name") and version ("0.1") programmatically from my Scala code? I don't want to repeat them in two places if I can help it.

我的问题很简单：有没有办法从我的 Scala 代码中以编程方式访问应用程序的名称（“my-app-name”）和版本（“0.1”）？如果可以的话，我不想在两个地方重复它们。

Any guidance greatly appreciated!

非常感谢任何指导！

采纳答案by Eugene Yokota

sbt-buildinfo

sbt-buildinfo

I just wrote sbt-buildinfo. After installing the plugin:

我刚刚写了sbt-buildinfo。安装插件后：

lazy val root = (project in file(".")).
  enablePlugins(BuildInfoPlugin).
  settings(
    buildInfoKeys := Seq[BuildInfoKey](name, version, scalaVersion, sbtVersion),
    buildInfoPackage := "foo"
  )

Edit: The above snippet has been updated to reflect more recent version of sbt-buildinfo.

编辑：以上代码段已更新以反映 sbt-buildinfo 的更新版本。

It generates foo.BuildInfoobject with any setting you want by customizing buildInfoKeys.

它foo.BuildInfo通过自定义生成具有您想要的任何设置的对象buildInfoKeys。

Ad-hoc approach

临时方法

I've been meaning to make a plugin for this,(I wrote it) but here's a quick script to generate a file:

我一直想为此制作一个插件，（我写了它）但这里有一个快速生成文件的脚本：

sourceGenerators in Compile <+= (sourceManaged in Compile, version, name) map { (d, v, n) =>
  val file = d / "info.scala"
  IO.write(file, """package foo
    |object Info {
    |  val version = "%s"
    |  val name = "%s"
    |}
    |""".stripMargin.format(v, n))
  Seq(file)
}

You can get your version as foo.Info.version.

您可以将您的版本作为foo.Info.version.

回答by Andrej Herich

Name and version are inserted into manifest. You can access them using java reflection from Packageclass.

名称和版本被插入到清单中。您可以使用来自Package类的Java 反射访问它们。

val p = getClass.getPackage
val name = p.getImplementationTitle
val version = p.getImplementationVersion