Scala：`-` [dash，minus]命令不推荐使用`onFailure`，将在0.14.0中删除

Question

当我在我的Scala项目上sbt compile -feature时，我收到了一个神秘的警告：

The `-` command is deprecated in favor of `onFailure` and will be removed in 0.14.0

我不知道破折号/减号命令是什么或者它可能在哪里使用。在谷歌上搜索它是不可能的，也不可能为它编写代码库（只有/ / / / / /破折/）。

如果至少我知道它的定义。我在scala文档中找不到任何内容。

Answer 1

我想你正在寻找这个：

// commands with poor choices for names since they clash with the usual conventions for command line options
//   these are not documented and are mainly internal commands and can be removed without a full deprecation cycle
object Compat {
    def OnFailure = "-"
    ...
    def OnFailureDeprecated = deprecatedAlias(OnFailure, BasicCommandStrings.OnFailure)
    ...
    private[this] def deprecatedAlias(oldName: String, newName: String): String =
        s"The `$oldName` command is deprecated in favor of `$newName` and will be removed in 0.14.0"
}

Source here

此外，可以找到各种相关的问题和信息here，尤其是如何将-feature添加到scalac选项中。