SBT 不能将 Seq[Object] 附加到 Seq[ModuleID] [英] SBT cannot append Seq[Object] to Seq[ModuleID]

问题描述

SBT 因不正确的附加错误而不断失败.我使用了我见过无数次的构建文件的确切格式.

SBT keeps failing with improper append errors. Im using the exact format of build files I have seen numerous times.

build.sbt:

lazy val backend = (project in file("backend")).settings(
name := "backend",
libraryDependencies ++= (Dependencies.backend)
).dependsOn(api).aggregate(api)

dependencies.scala:

dependencies.scala:

import sbt._

object Dependencies {

lazy val backend = common ++ metrics

val common = Seq(
"com.typesafe.akka" %% "akka-actor" % Version.akka,
"com.typesafe.akka" %% "akka-cluster" % Version.akka,
"org.scalanlp.breeze" %% "breeze" % Version.breeze,
"com.typesafe.akka" %% "akka-contrib" % Version.akka,
"org.scalanlp.breeze-natives" % Version.breeze,
"com.google.guava" % "guava" % "17.0"
)

val metrics = Seq("org.fusesource" % "sigar" % "1.6.4")

我不太明白 SBT 抱怨的原因

Im Im not quite why SBT is complaining

error: No implicit for Append.Values[Seq[sbt.ModuleID], Seq[Object]] found,
so Seq[Object] cannot be appended to Seq[sbt.ModuleID]
libraryDependencies ++= (Dependencies.backend)
                    ^

推荐答案

Short Version (TL;DR)

common 有错误:你想替换这一行

Short Version (TL;DR)

There's an error in common: you want to replace this line

"org.scalanlp.breeze-natives" % Version.breeze,

用这条线

"org.scalanlp" %% "breeze-natives" % Version.beeze,

<小时>

长版

1. "org.scalanlp.breeze-natives" % Version.breeze 是 GroupArtifactID 而不是 ModuleID.

这会导致 common 变成 Seq[Object] 而不是 Seq[ModuleID].

This causes common to become a Seq[Object] instead of a Seq[ModuleID].

因此 Dependencies.backend 也是一个 Seq[Object]

最终无法(通过 ++=)附加到 libraryDependencies(定义为 SettingKey[Seq[ModuleID]]) 因为没有可用的 Append.Values[Seq[sbt.ModuleID], Seq[Object]].

Which ultimately can't be appended (via ++=) to libraryDependencies (defined as a SettingKey[Seq[ModuleID]]) because there is no available Append.Values[Seq[sbt.ModuleID], Seq[Object]].

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