解决SBT依赖关系 [英] resolviing SBT dependencies

问题描述

我是JVM开发的新手（我正在使用Scala和SBT），并且在解决依赖项方面遇到麻烦。昨天，我在解决 org.restlet.2.1.1 依赖性时遇到了麻烦，而今天，在解决以下问题时遇到了麻烦：

I am new to JVM development (I am using Scala and SBT) and am having trouble resolving dependencies. Yesterday, I had trouble resolving the org.restlet.2.1.1 dependency and today, I am having trouble with resolving the following:

[error] (*:update) sbt.ResolveException: unresolved dependency: com.mongodb.casbah#casbah_2.9.2;2.1.5-1: not found
[error] unresolved dependency: org.scalatra#scalatra_2.9.2;2.3.0: not found
[error] unresolved dependency: org.scalatra#scalatra-akka2_2.9.2;2.3.0: not found
[error] unresolved dependency: org.scalatra#scalatra-specs2_2.9.2;2.3.0: not found

我正在使用来自github的 giter8 scalatra-mongodb项目模板：点击我。由于该项目有些陈旧，因此有理由要尝试获取不再存在或不兼容的过时版本。在这种情况下，人该怎么办？我尝试摆弄 build.sbt 文件中的版本号，但这没有用（而且似乎更糟！）。

I am using a giter8 scalatra-mongodb project template from github: click me. Since the project is a little old, it stands to reason that I am trying to obtain outdated versions that no longer exist or are compatible. What does one do in this situation? I tried fiddling with the version numbers in my build.sbt file, but this did not work (and appears to be worse!).

以下是我的 build.sbt 文件的内容：

The following is the contents of my build.sbt file:

scalaVersion := "2.9.2"

mainClass := Some("JettyLauncher")

seq(webSettings :_*)

port in container.Configuration := 8080

seq(assemblySettings: _*)

libraryDependencies ++= Seq(
  "com.mongodb.casbah" %% "casbah" % "2.8.1-1",
  "org.scalatra" %% "scalatra" % "2.2.0",
  "org.scalatra" %% "scalatra-akka2" % "2.2.0",
  "org.scalatra" %% "scalatra-specs2" % "2.2.0" % "test",
  "org.mortbay.jetty" % "servlet-api" % "3.0.20100224" % "provided",
  "org.eclipse.jetty" % "jetty-server" % "8.0.0.M3" % "container, compile",
  "org.eclipse.jetty" % "jetty-util" % "8.0.0.M3" % "container, compile",
  "org.eclipse.jetty" % "jetty-webapp" % "8.0.0.M3" % "container, compile"
  )

resolvers ++= Seq(
  "Sonatype OSS" at "http://oss.sonatype.org/content/repositories/releases/",
  "Sonatype OSS Snapshots" at "http://oss.sonatype.org/content/repositories/snapshots/",
  "Typesafe Repository" at "http://repo.typesafe.com/typesafe/releases/",
  "Akka Repo" at "http://akka.io/repository/",
  "Web plugin repo" at "http://siasia.github.com/maven2"
)

以下是我的 plugins.sbt 文件：

addSbtPlugin("com.earldouglas" %% "xsbt-web-plugin" % "0.9.0")

addSbtPlugin("com.eed3si9n" % "sbt-assembly" % "0.7.2")

请注意，当我第一次生成模板时，我收到的第一个插件缺少相关性。幸运的是，此插件的github页提供了更新的说明，我能够克服此依赖关系。

Note that when I first generated the template, I was receiving missing dependencies for this first plugin. Fortunately, the github page for this plugin gave updated instructions and I am able to get past this dependency.

无论如何，我需要获取这些依赖关系的版本是什么一切正常吗？总的来说，解决这些依赖关系的策略是什么（现在我不知道该怎么做（除了访问github页面并用版本号摆弄）？

Anyway, what are the versions of these dependencies that I need to get everything working? In general what is a strategy for resolving these dependencies (right now I have no idea what to do (other than visit the github pages and fiddle with version numbers)?

谢谢

推荐答案

我至少已经得到sbt来解决我依赖的东西，无论它是值得的（它都有类路径问题）现在...）。无论如何，以下是我新的和改进的 build.sbt 文件：

I have at least gotten sbt to resolve my dependencies for whatever that is worth (it has classpath issues now...). Anyway, the following is my new and improved build.sbt file:

scalaVersion := "2.10.4"

mainClass := Some("JettyLauncher")

seq(webSettings :_*)

port in container.Configuration := 8080

seq(assemblySettings: _*)

libraryDependencies +=  "org.mongodb" %% "casbah-core" % "2.7.3"

libraryDependencies += "org.scalatra" %% "scalatra" % "2.2.0-RC3" cross CrossVersion.binary

libraryDependencies +=  "org.scalatra" %% "scalatra-akka" % "2.2.0-RC3" 

libraryDependencies +=  "org.scalatra" %% "scalatra-specs2" % "2.2.0" % "test"

libraryDependencies +=  "org.mortbay.jetty" % "servlet-api" % "3.0.20100224" % "provided"

libraryDependencies +=  "org.eclipse.jetty" % "jetty-server" % "9.0.0.M5" % "container"

libraryDependencies +=  "org.eclipse.jetty" % "jetty-util" % "9.0.0.M5" % "container"

libraryDependencies +=  "org.eclipse.jetty" % "jetty-webapp" % "9.0.0.M5" % "container"

resolvers ++= Seq(
  "Sonatype releases" at "http://oss.sonatype.org/content/repositories/releases/",
  "Sonatype snapshots" at "http://oss.sonatype.org/content/repositories/snapshots/",
  "Typesafe Repository" at "http://repo.typesafe.com/typesafe/releases/",
  "Akka Repo" at "http://akka.io/repository/",
  "Web plugin repo" at "http://siasia.github.com/maven2"
)

我真正要做的就是花几个小时在谷歌上搜索并搜索与我使用的scala版本兼容的mvn存储库（2.10.4）。我了解到 %% 会将scala版本附加到依赖项名称（由于Scala一直在发展，这似乎是一个很好的约定）。一次，我解决了一些依赖关系，其余的解决了！

All I really did was spend a few hours googling and searching mvn repositories that were compatible with the scala version I am using (2.10.4). I learned that %% will append the scala-version to the dependency name (seems like a nice convention since Scala is always evolving). Once, I got a few dependencies resolved, the rest caved!

这篇关于解决SBT依赖关系的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！