sbt 是一个代码构建工具，它支持 Scala Java 和其他多种语言。要求 Java 1.8 及以上版本的支持。
可以参考文档 Installing sbt 进行安装。
sbt 使用 build.sbt 作为一个项目的主配置文件。在项目文件夹下运行命令 sbt 进入交互模式即 sbt interactive shell。在 sbt shell 中可以运行各种命令, 使用 help 查看有哪些命令可以运行
[scala-starter-example] $ help
about Displays basic information about sbt and the build.
tasks Lists the tasks defined for the current project.
settings Lists the settings defined for the current project.
reload (Re)loads the current project or changes to plugins project or returns from it.
new Creates a new sbt build.
projects Lists the names of available projects or temporarily adds/removes extra builds to the session.
project Displays the current project or changes to the provided `project`.
set [every] <setting> Evaluates a Setting and applies it to the current project.
session Manipulates session settings. For details, run 'help session'.
inspect [tree|uses|definitions|actual] <key> Prints the value for 'key', the defining scope, delegates, related definitions, and dependencies.
<log-level> Sets the logging level to 'log-level'. Valid levels: debug, info, warn, error
plugins Lists currently available plugins.
last Displays output from a previous command or the output from a specific task.
last-grep Shows lines from the last output for 'key' that match 'pattern'.
export <tasks>+ Executes tasks and displays the equivalent command lines.
show <key> Displays the result of evaluating the setting or task associated with 'key'.
all <task>+ Executes all of the specified tasks concurrently.
help Displays this help message or prints detailed help on requested commands (run 'help <command>').
completions Displays a list of completions for the given argument string (run 'completions <string>').
; <command> (; <command>)* Runs the provided semicolon-separated commands.
early(<command>) Schedules a command to run before other commands on startup.
exit Terminates the build.
~ <command> Executes the specified command whenever source files change.
More command help available using 'help <command>' for:
!, +, ++, +-, <, ^, ^^, alias, append, apply, client, eval, iflast, onFailure, reboot, shell, startServer
使用 exit 退出 sbt shell
Scala REPL
还可以从 sbt shell 进入 Scala REPL console 模式，使用 console 命令
[scala-starter-example] $ console
[info] Starting scala interpreter...
Welcome to Scala 2.12.4 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_131).
Type in expressions for evaluation. Or try :help.
scala>
使用 :help 查看更多命令
scala> :help
All commands can be abbreviated, e.g., :he instead of :help.
:edit <id>|<line> edit history
:help [command] print this summary or command-specific help
:history [num] show the history (optional num is commands to show)
:h? <string> search the history
:imports [name name ...] show import history, identifying sources of names
:implicits [-v] show the implicits in scope
:javap <path|class> disassemble a file or class name
:line <id>|<line> place line(s) at the end of history
:load <path> interpret lines in a file
:paste [-raw] [path] enter paste mode or paste a file
:power enable power user mode
:quit exit the interpreter
:replay [options] reset the repl and replay all previous commands
:require <path> add a jar to the classpath
:reset [options] reset the repl to its initial state, forgetting all session entries
:save <path> save replayable session to a file
:sh <command line> run a shell command (result is implicitly => List[String])
:settings <options> update compiler options, if possible; see reset
:silent disable/enable automatic printing of results
:type [-v] <expr> display the type of an expression without evaluating it
:kind [-v] <type> display the kind of a type. see also :help kind
:warnings show the suppressed warnings from the most recent line which had any
在 Scala REPL console 可以交互式地执行 Scala 语言程序。
使用 :q 退出 Scala REPL console.
Dockerize your app
使用命令 Docker/publishLocal 把应用程序打包成本地的 Docker 镜像。
[scala-starter-example] $ Docker/publishLocal
...
[info] Successfully built 16769d5fc163
[info] Successfully tagged scala-starter-example:1.0-SNAPSHOT
[info] SECURITY WARNING: You are building a Docker image from Windows against a non-Windows Docker host. All files and directories added to build context will have '-rwxr-xr-x' permissions. It is recommended to double check and reset permissions for sensitive files and directories.
[info] Built image scala-starter-example:1.0-SNAPSHOT
[success] Total time: 14 s, completed May 9, 2018 11:24:43 AM
然后便可运行应用程序的 Docker 容器
docker run scala-starter-example:1.0-SNAPSHOT
https://www.scala-sbt.org/
https://github.com/sbt/sbt
Proxy
set JAVA_OPTS=-Dhttp.proxySet=true -Dhttp.proxyHost=[Your Proxy server] -Dhttp.proxyPort=8080
https://www.scala-sbt.org/1.x/docs/Setup-Notes.html#HTTP%2FHTTPS%2FFTP+Proxy
https://stackoverflow.com/questions/13803459/how-to-use-sbt-from-behind-proxy
What’s Wrong with SBT
SBT 号称 Simple Build Tool 但实际上它什么都行，除了简单。查看这篇博客了解 SBT 有哪些问题 http://www.lihaoyi.com/post/SowhatswrongwithSBT.html
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