sbt快速入门

2021-11-24 13:29:31 浏览数 (1)

sbt类似与maven, gradle的项目管理工具，主要用在scala，也可以用在java项目，本文介绍一下常用的使用命令和语法

安装

  • mac
代码语言：javascript复制
brew install sbt
  • redhat&centos
代码语言：javascript复制
# remove old Bintray repo file
sudo rm -f /etc/yum.repos.d/bintray-rpm.repo
curl -L https://www.scala-sbt.org/sbt-rpm.repo > sbt-rpm.repo
sudo mv sbt-rpm.repo /etc/yum.repos.d/
sudo yum install sbt

快速使用

代码语言：javascript复制
➜ mkdir foo-build
➜ cd foo-build
➜ touch build.sbt
➜  foo-build sbt
[info] Updated file /Users/timxia/Workspace/sbt/foo-build/project/build.properties: set sbt.version to 1.3.13
[info] welcome to sbt 1.3.13 (Oracle Corporation Java 1.8.0_251)
[info] loading global plugins from /Users/timxia/.sbt/1.0/plugins
[info] loading settings for project foo-build from build.sbt ...
[info] set current project to foo-build (in build file:/Users/timxia/Workspace/sbt/foo-build/)
[info] sbt server started at local:///Users/timxia/.sbt/1.0/server/7c3ce04c72481c8444dd/sock
sbt:foo-build>

sbt命令

  • sbt启动，进入交互式命令
  • help帮助
  • exit 退出sbt
  • compile编译, ~compile自动检测更新后编译
  • run 启动
  • reload 重新加载build.sbt
  • session save 保存当前会话信息到build.sbt
  • test执行测试, ~testQuick自动检测并执行测试
  • projects列出所有项目

build.sbt语法

代码语言：javascript复制
# 设置scala版本号
ThisBuild / scalaVersion := "2.13.6"
# 设置项目所属组织
ThisBuild / organization := "com.example"

# 自定义变量
val scalaTest = "org.scalatest" %% "scalatest" % "3.2.7"

## 配置项目hello
lazy val hello = (project in file("."))
  # 如果配置了子项目，则聚合起来；父项目上执行的命令，也会广播到子项目
  .aggregate(helloCore)
  # 设置对子项目的依赖
  .dependsOn(helloCore)
  .settings(
    # 设置项目名称
    name := "Hello",
    # 添加项目依赖: groupID % artifactID % revision % configuration，这里的configuration类似于maven中的scope，可以Test, Compile
    # 如果是scala的库，一般使用%%，这样就会找到对应scala版本的库
    libraryDependencies  = "org.scalatest" %% "scalatest" % "3.2.7" % Test,
    # 如果使用自定义变量，也可以用如下格式
    libraryDependencies  = scalaTest % Test,
  )

## 配置一个子项目helloCore
lazy val helloCore = (project in file("core"))
  .settings(
    name := "Hello Core",
    libraryDependencies  = scalaTest % Test,
  )

## 覆盖一下jar包
dependencyOverrides   = Seq(
  "gdt.api" % "gdt-api-aaa" % "1.0.6",
  "org.apache.commons" % "commons-compress" % "1.9",
  "gdt.api" % "api-client-core" % "2.2.6",
  "gdt.api" % "api-client-l5" % "1.1.2",
  "gdt.api" % "gdt-api-adservice" % "2.0.75",
  "com.alibaba" % "fastjson" % "1.2.67",
  "gdt.api" % "gdt-api-customer" % "1.0.69",
  "com.fasterxml.jackson.core" % "jackson-databind" % "2.8.11",
  "com.tencent.tdbank" % "TDBusSDK" % "1.2.17",
  "gdt.infra" % "infra-l5" % "1.2.7"
)

## 排除一些jar包
excludeDependencies   = Seq(
  // commons-logging is replaced by jcl-over-slf4j
  ExclusionRule("org.slf4j", "slf4j-log4j12")
)

常见问题

  • 有时候启动sbt后terminal窗口会停在Getting org.scala-sbt sbt上，也不知道发生了什么。可以用如下命令，查看程序进展tail -f $HOME/.sbt/boot/update.log

参考

  • sbt by example
  • stuck at "Getting org.scala-sbt sbt 0.13.6 ..." when running sbt in terminal
scala 打包 腾讯云测试服务

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