Question

我很难理解scalapb的语法，特别是我试图为多项目SBT构建添加多个.proto源目录。

我的项目结构如下：

/build.sbt
/main/src/protobuf
/common/main/src/protobuf
/client/main/src/protobuf

我的build.sbt如下：

name := "myApp"

import Dependencies._

import com.trueaccord.scalapb.{ScalaPbPlugin => PB}

val protoDirectories = Seq(
  file("common/src/main/protobuf"),
  file("client/src/main/protobuf")
)

sourceDirectories in PB.protobufConfig ++= protoDirectories

PB.protobufSettings ++ Seq(
  flatPackage := false
)

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

lazy val client = (project in file("client")).
  settings(Commons.settings: _*).
  settings(libraryDependencies ++= clientDependencies).
  dependsOn(common)

当我运行sbt compile时，收到以下错误消息：

[error] Reference to undefined setting: 
[error] 
[error]   sphere/*:sourceDirectories from myApp/*:sourceDirectories (<path_to_project_dir>\build.sbt:11)
[error]      Did you mean myApp/protobuf:sourceDirectories ?

有人可以指出我正确的方向吗？我在这里没有理解一些基本概念......

修改

好的，所以我指的是protoDirectories的错误序列。我修改了build.sbt以反映新的更改。我仍然有一个问题，我的.proto文件没有在子项目中编译。如果我将.proto文件移动到root / main / src / protobuf，它们就可以正常编译。

Answer 1

如果两个项目都包含src/main/protobuf中的文件，则需要分别为这两个项目启用ScalaPB插件。此示例还说明了如何设置导入搜索路径。完整示例位于https://github.com/thesamet/scalapb-test/tree/multiproject

import com.trueaccord.scalapb.{ScalaPbPlugin => PB}

version in PB.protobufConfig := "3.0.0-beta-2"

lazy val common = (project in file("common")).
  settings(PB.protobufSettings)

lazy val client = (project in file("client")).
  settings(PB.protobufSettings ++ Seq(
    // If you want proto files in client to import proto files in common.
    PB.includePaths in PB.protobufConfig += file("common/src/main/protobuf")
  )).
  dependsOn(common)

将多个scalapb源目录添加到多项目SBT Build

1 个答案: