scala - 困惑如何建立多项目 sbt 项目

Question

我在这里使用 sbt .13。

到目前为止我有这个:

import sbt._
import Keys._
import play.Project._

object ApplicationBuild extends Build {

  val appVersion = "1.0"

  resolvers += "local maven" at "/Users/blankman/.m2/repository/"

  val commonDependencies = Seq()
  val modelDependencies = Seq(
    "com.typesafe.slick" %% "slick" % "2.0.1",
    "org.slf4j" % "slf4j-nop" % "1.6.4"
  )

  val serviceDependencies = Seq(
    "com.typesafe.slick" %% "slick" % "2.0.1",
    "org.slf4j" % "slf4j-nop" % "1.6.4"
  )

  val webDependencies = Seq(
    //"org.apache.tomcat" % "tomcat-jdbc" % "8.0.3",
    "mysql" % "mysql-connector-java" % "5.1.30",
    "com.typesafe.slick" %% "slick" % "2.0.1"
  )


  lazy val common = Project(
    id = "app-common",
    base = file("app-common"),
    dependencies = commonDependencies
  )

  lazy val models = Project(
    id = "app-models",
    base = file("app-models"),
    settings(modelDependencies: _*)
    )
  ).dependsOn(common)

  lazy val services = Project(
    id = "app-services",
    base = file("app-services"),
    settings = Seq(
      libraryDependencies ++= serviceDependencies
    )
  ).dependsOn(models, common)


  lazy val web = play.Project("app-web", appVersion, webDependencies,
                        path = file("app-web"))
                      .settings(playScalaSettings: _*)
                      .dependsOn(services)

}

这行不通。例如，如果我进入:

项目应用程序模型

然后尝试编译，它说编译无效或其他什么。

我真的很困惑如何建立一个项目。正确的做法是什么？

在这里查看这张幻灯片#10 http://jsuereth.com/scala/2013/06/11/effective-sbt.html它说我可以做:

lazy val web = (
  Project("app-models", file("app-models"))
  settings(
     libraryDependencies += modelDependencies
  )
)

但是当我这样做时，我也会收到错误。

我基本上在 sbt 中有一些项目:

common
models
services
web (which is play)

• 模型取决于公共(public)资源
• 服务取决于公共(public)资源+模型
• 网络依赖于服务

有人可以帮我让它发挥作用吗？

Answer 1

我在您的构建定义中发现了一些问题，但自从您购买了 Josh 的 Effective sbt说吧，我认为我们应该全力以赴地追求风格。

有效的sbt

这是文件。

项目/build.properties

sbt.version=0.13.2

项目/play.sbt

val playVersion = "2.2.2"

resolvers += Resolver.typesafeRepo("releases")

addSbtPlugin("com.typesafe.play" % "sbt-plugin" % playVersion) 

项目/commons.scala

import sbt._
import Keys._

object Commons {
  val appVersion = "1.0"

  val settings: Seq[Def.Setting[_]] = Seq(
    version := appVersion,
    resolvers += Opts.resolver.mavenLocalFile
  )
}

项目/依赖项.scala

import sbt._
import Keys._

object Dependencies {
  val slickVersion = "2.0.1"
  val slick = "com.typesafe.slick" %% "slick" % slickVersion
  val slf4jVersion = "1.6.4"
  val slf4jNop = "org.slf4j" % "slf4j-nop" % slf4jVersion
  val mysqlConnectorVersion = "5.1.30"
  val mysqlConnector = "mysql" % "mysql-connector-java" % mysqlConnectorVersion

  val commonDependencies: Seq[ModuleID] = Seq(
    slick,
    slf4jNop
  )
  val modelDependencies: Seq[ModuleID] = Seq()
  val serviceDependencies: Seq[ModuleID] = Seq()
  val webDependencies: Seq[ModuleID] = Seq(
    mysqlConnector
  )
}

构建.sbt

import play.Project._
import Dependencies._

lazy val appCommon = (project in file("app-common")).
  settings(Commons.settings: _*).
  settings(
    libraryDependencies ++= commonDependencies
  )

lazy val appModels = (project in file("app-models")).
  settings(Commons.settings: _*).
  settings(
    libraryDependencies ++= modelDependencies
  ).
  dependsOn(appCommon)

lazy val appServices = (project in file("app-services")).
  settings(Commons.settings: _*).
  settings(
    libraryDependencies ++= serviceDependencies
  ).
  dependsOn(appModels, appCommon)

lazy val appWeb = (project in file("app-web")).
  settings(Commons.settings: _*).
  settings(playScalaSettings: _*).
  dependsOn(appServices)

注释

设置参数与设置方法

对于 models 和 services，您将设置序列传递到 Project(...) 构造函数中，因此默认设置为可能未加载。您可以手动传入默认设置，或者在 Project 上使用 settings(...) 方法，我推荐这样做。

lazy val appModels = (project in file("app-models")).
  settings(
    libraryDependencies ++= modelDependencies
  ).
  dependsOn(appCommon)

Josh 使用带括号的后缀表示法，但我更喜欢使用点表示法，因此这与演讲略有偏差。

库依赖++=

如上面的示例，您必须将 modelDependency 传递给 libraryDependency。您已将其直接调用设置。

解析器

resolvers 设置未传递到任何内容，这可能不正确。