如何从命令行更改日志级别？

Question

如何在不修改现有配置的情况下在命令行中更改sbt中的日志级别？

Answer 1

如更改 sbt的全局日志记录级别中所述:

要在启动时执行任何命令之前设置日志记录级别,请在日志记录级别之前使用 -

有四个日志记录级别:

• 调试
• 信息
• 警告
• 错误

如果您需要在命令行中应用"而不修改现有配置",请执行sbt具有前缀为双短划线的适当级别的启动器.

jacek:~/oss/scalania
$ sbt --debug
[debug] > boot
[debug] > reload
[debug] > sbtStashOnFailure
[debug] > onFailure load-failed
[debug] > loadp
[info] Loading global plugins from /Users/jacek/.sbt/0.13/plugins
[debug] Running task... Cancelable: false, check cycles: false
[debug]

随着sbt.boot.properties你可能会sbt打印出内部日志了.请参阅启动器规范.

Answer 2

For SBT 0.12:

If you want to change the log level from the command line, you may do in sbt interactive mode without changing your build.sbt file or any configuration. Just type:

> set logLevel := Level.Debug

However if you are writing some scripts that will run in your server and you can't do interactively, you will have to create a boot.properties file setting the desired log level and pass this file in the command line, by running

sbt -Dsbt.boot.properties=path-to-your-boot.properties

Check the documentation for boot.properties here