需求：在Play、Sbt环境下，通过Idea 单步调试
问题如下：
huideMacBook-Pro:graph huiyu$ sbt -jvm-debug 9999
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=384m; support was removed in 8.0
[info] Loading settings from idea.sbt,plugins.sbt ...
[info] Loading global plugins from /Users/huiyu/.sbt/1.0/plugins
[info] Loading settings from plugins.sbt ...
[info] Loading project definition from /Users/huiyu/ideaProject/graph/project
[info] Loading settings from builld.sbt ...
[info] Loading settings from build.sbt ...
[info] Loading settings from build.sbt ...
[info] Set current project to graphPlatform (in build file:/Users/huiyu/ideaProject/graph/)
[warn] The `-` command is deprecated in favor of `onFailure` and will be removed in 0.14.0
[error] Expected letter
[error] Expected symbol
[error] Expected '!'
[error] Expected '+'
[error] Expected '++'
[error] Expected '^'
[error] Expected '^^'
[error] Expected '+-'
[error] Expected 'debug'
[error] Expected 'info'
[error] Expected 'warn'
[error] Expected 'error'
[error] Expected ';'
[error] Expected end of input.
[error] Expected 'early('
[error] Expected '-'
[error] Expected 'show'
[error] Expected 'all'
[error] Expected '*'
[error] Expected '{'
[error] Expected project ID
[error] Expected configuration
[error] Expected key
[error] 9999
[error] ^
[error] Not a valid command: jvm-debug
[error] Not a valid project ID: jvm-debug
[error] Expected ':' (if selecting a configuration)
[error] Not a valid key: jvm-debug
[error] jvm-debug
[error] ^
解决如下：
1、在Sbt下面缺少【preloaded】文件，下面是完整的
huideMacBook-Pro:.sbt huiyu$ pwd
/Users/huiyu/.sbt
huideMacBook-Pro:.sbt huiyu$ ls
0.13 1.0 boot preloaded repositories
2、如果是MacPorts安装，则卸载MacPort使用HomeBrew
https://www.jianshu.com/p/f9b2c74cb519
3、按照HomeBrew会遇见一下问题，解决方案如下
mac下安装和使用brew
homebrew 升级失败
http://www.fanyeong.com/2017/12/14/homebrew-update-fail/
4、重写安装Sbt
5、启动在Play、Sbt环境下，通过Idea 单步调试
1）sbt -jvm-debug 9999
2）play run起来
3）idea配置如下，启动debug
