sbt常用命令

命令補(bǔ)全

跟其他unix-like的命令一樣，用tab鍵補(bǔ)全命令，如果匹配多個命令，則會顯示命令列表，以供選擇。

查看?版本信息

> about
[info] This is sbt 0.13.15
[info] The current project is {file:/Users/yangjia/sources/learning_scala/sbt/helloworld/}root 0.1.0-SNAPSHOT
[info] The current project is built against Scala 2.12.1
[info] Available Plugins: sbt.plugins.IvyPlugin, sbt.plugins.JvmPlugin, sbt.plugins.CorePlugin, sbt.plugins.JUnitXmlReportPlugin, sbt.plugins.Giter8TemplatePlugin
[info] sbt, sbt plugins, and build definitions are using Scala 2.10.6

列出所有任務(wù)(tasks)

> tasks
This is a list of tasks defined for the current project.
It does not list the scopes the tasks are defined in; use the 'inspect' command for that.
Tasks produce values. Use the 'show' command to run the task and print the resulting value.
clean Deletes files produced by the build, such as generated sources, compiled classes, and task caches.
compile Compiles sources.
console Starts the Scala interpreter with the project classes on the classpath.
consoleProject Starts the Scala interpreter with the sbt and the build definition on the classpath and useful imports.
consoleQuick Starts the Scala interpreter with the project dependencies on the classpath.
copyResources Copies resources to the output directory.
doc Generates API documentation.
package Produces the main artifact, such as a binary jar. This is typically an alias for the task that actually does the packaging.
packageBin Produces a main artifact, such as a binary jar.
packageDoc Produces a documentation artifact, such as a jar containing API documentation.
packageSrc Produces a source artifact, such as a jar containing sources and resources.
publish Publishes artifacts to a repository.
publishLocal Publishes artifacts to the local Ivy repository.
publishM2 Publishes artifacts to the local Maven repository.
run Runs a main class, passing along arguments provided on the command line.
runMain Runs the main class selected by the first argument, passing the remaining arguments to the main method.
test Executes all tests.
testOnly Executes the tests provided as arguments or all tests if no arguments are provided.
testQuick Executes the tests that either failed before, were not run or whose transitive dependencies changed, among those provided as arguments.
update Resolves and optionally retrieves dependencies, producing a report.

?刪除target目錄下?編譯生成的文件

> clean
[success] Total time: 0 s, completed 2017-7-15 19:45:58

?

編譯

注意：編譯是增量編譯

> compile
[info] Updating {file:/Users/yangjia/sources/learning_scala/sbt/helloworld/}root...
[info] Resolving jline#jline;2.14.1 ...
[info] Done updating.
[info] Compiling 1 Scala source to /Users/yangjia/sources/learning_scala/sbt/helloworld/target/scala-2.12/classes...
[success] Total time: 1 s, completed 2017-7-15 19:46:04

?運(yùn)行

> run
[info] Updating {file:/Users/yangjia/sources/learning_scala/sbt/helloworld/}root...
[info] Resolving jline#jline;2.14.1 ...
[info] Done updating.
[info] Compiling 1 Scala source to /Users/yangjia/sources/learning_scala/sbt/helloworld/target/scala-2.12/classes...
[info] Running example.Hello 
hello
[success] Total time: 2 s, completed 2017-7-15 19:49:28

?run依賴于compile，所以會先執(zhí)行compile，然后執(zhí)行main方法（如果有多個，會?提示要求選擇一個執(zhí)行）。

運(yùn)行測試用例

> test
[info] Compiling 1 Scala source to /Users/yangjia/sources/learning_scala/sbt/helloworld/target/scala-2.12/test-classes...
[info] HelloSpec:
[info] The Hello object
[info] - should say hello
[info] Run completed in 589 milliseconds.
[info] Total number of tests run: 1
[info] Suites: completed 1, aborted 0
[info] Tests: succeeded 1, failed 0, canceled 0, ignored 0, pending 0
[info] All tests passed.
[success] Total time: 4 s, completed 2017-7-15 19:52:15

更新外部依賴

> update
[info] Updating {file:/Users/yangjia/sources/learning_scala/sbt/helloworld/}root...
[info] Resolving jline#jline;2.14.1 ...
[info] Done updating.
[success] Total time: 0 s, completed 2017-7-15 19:54:20

Mac下，更新的庫保存在~/.ivy2/cache目錄下。

更新工程配置

> reload
[info] Loading project definition from /Users/yangjia/sources/learning_scala/sbt/helloworld/project
[info] Set current project to Hello (in build file:/Users/yangjia/sources/learning_scala/sbt/helloworld/)

查看工程配置

有兩個方法，一是直接輸入配置名，顯示簡要信息

> name
[info] Hello
> version
[info] 0.1.0-SNAPSHOT

二是用inspect，顯示詳細(xì)信息

> inspect version
[info] Setting: java.lang.String = 0.1.0-SNAPSHOT
[info] Description:
[info] The version/revision of the current module.
[info] Provided by:
[info] {file:/Users/yangjia/sources/learning_scala/sbt/helloworld/}/*:version
[info] Defined at:
[info] /Users/yangjia/sources/learning_scala/sbt/helloworld/build.sbt:8
...
> inspect libraryDependencies
[info] Setting: scala.collection.Seq[sbt.ModuleID] = List(org.scala-lang:scala-library:2.12.1, org.scalatest:scalatest:3.0.1:test)
[info] Description:
[info] Declares managed dependencies.
[info] Provided by:
[info] {file:/Users/yangjia/sources/learning_scala/sbt/helloworld/}root/*:libraryDependencies
[info] Defined at:
[info] (sbt.Classpaths) Defaults.scala:1300
[info] /Users/yangjia/sources/learning_scala/sbt/helloworld/build.sbt:11
...

如果不太明白某個配置項(xiàng)的含義，settings?會打印所有配置項(xiàng)的含義。

編譯并進(jìn)入REPL

> console
[info] Compiling 1 Scala source to /Users/yangjia/sources/learning_scala/sbt/helloworld/target/scala-2.12/classes...
[info] Starting scala interpreter...
[info] 
Welcome to Scala 2.12.1 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_101).
Type in expressions for evaluation. Or try :help.
scala> :type example.Test
example.Test.type
scala> :quit
[success] Total time: 99 s, completed 2017-7-15 19:43:13

自動編譯

~compile?：當(dāng)源代碼變化時，自動編譯。這其實(shí)是個組合命令~+compile。?也可以自動執(zhí)行用例：~test

> ~compile
[success] Total time: 0 s, completed 2017-7-15 20:01:04
1. Waiting for source changes... (press enter to interrupt)
[info] Compiling 1 Scala source to /Users/yangjia/sources/learning_scala/sbt/helloworld/target/scala-2.12/classes...
[success] Total time: 1 s, completed 2017-7-15 20:01:27
2. Waiting for source changes... (press enter to interrupt)

查詢最后一次執(zhí)行XX命令的信息

> last run
[info] Running example.Hello 
[debug] Waiting for threads to exit or System.exit to be called.
[debug] Classpath:
[debug] /Users/yangjia/sources/learning_scala/sbt/helloworld/target/scala-2.12/classes
[debug] /Users/yangjia/.ivy2/cache/org.scala-lang/scala-library/jars/scala-library-2.12.1.jar
[debug] Waiting for thread run-main-3 to terminate.
[debug] Thread run-main-3 exited.
[debug] Interrupting remaining threads (should be all daemons).
[debug] Sandboxed run complete..
[debug] Exited with code 0
> last clean
> last test
[debug] Running TaskDef(example.HelloSpec, org.scalatest.tools.Framework$$anon$1@4382b430, false, [SuiteSelector])
[info] Run completed in 208 milliseconds.
[info] Total number of tests run: 1
[info] Suites: completed 1, aborted 0
[info] Tests: succeeded 1, failed 0, canceled 0, ignored 0, pending 0
[info] All tests passed.
[debug] Passed tests:
[debug] example.HelloSpec

退出shell

> exit
$

退出還有快捷鍵: ctrl+d(Mac), ctrl+c(Mac/Linux), ctrl+z(Windows)

組合命令

如下所示，先執(zhí)行test，如果執(zhí)行成功，則執(zhí)行exit

> ; test ; exit
[info] Updating {file:/Users/yangjia/sources/learning_scala/sbt/helloworld/}root...
[info] Resolving jline#jline;2.14.1 ...
[info] Done updating.
[info] Compiling 1 Scala source to /Users/yangjia/sources/learning_scala/sbt/helloworld/target/scala-2.12/classes...
[info] Compiling 1 Scala source to /Users/yangjia/sources/learning_scala/sbt/helloworld/target/scala-2.12/test-classes...
[info] HelloSpec:
[info] The Hello object
[info] - should say hello
[info] Run completed in 441 milliseconds.
[info] Total number of tests run: 1
[info] Suites: completed 1, aborted 0
[info] Tests: succeeded 1, failed 0, canceled 0, ignored 0, pending 0
[info] All tests passed.
[success] Total time: 8 s, completed 2017-7-15 22:22:45
banxia:helloworld yangjia$

如果test執(zhí)行失敗，則不會執(zhí)行exit

> ; test ; exit
[info] Compiling 1 Scala source to /Users/yangjia/sources/learning_scala/sbt/helloworld/target/scala-2.12/test-classes...
[info] HelloSpec:
[info] The Hello object
[info] - should say hello *** FAILED ***
[info] "hello[]" did not equal "hello[z]" (HelloSpec.scala:7)
[info] Run completed in 447 milliseconds.
[info] Total number of tests run: 1
[info] Suites: completed 1, aborted 0
[info] Tests: succeeded 0, failed 1, canceled 0, ignored 0, pending 0
[info] *** 1 TEST FAILED ***
[error] Failed tests:
[error] example.HelloSpec
[error] (test:test) sbt.TestsFailedException: Tests unsuccessful
[error] Total time: 8 s, completed 2017-7-15 22:24:48
>

執(zhí)行scala表達(dá)式

> eval println("foo")
foo
[info] ans: Unit = null
> eval "pwd" !
/Users/yangjia/sources/learning_scala/sbt/helloworld
[info] ans: Int = 0
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