I have the following build.sbt with two sub projects. Everything compiles and runs fine.
One is a thin scala play project. dataextractor has a lot of util classes I want to call in the play project.
However, the configurarion below still leads to the following compilation error:
[error]
/Users/foo.bar/_vws/com.corp.enablement.scripts/sirf_extract_serve/tools_sirf_server/app/corp/tools/es_result_server/service/SystemInitializer.scala:6:21:
object dataextraction is not a member of package corp.tools [error]
import corp.tools.dataextraction.providers.confluence
This is my first sbt multi-project. Advice would be genuinley appreciated
lazy val tools_dataextractor = (project in file("tools_dataextractor")).settings(
Defaults.itSettings,
libraryDependencies += scalatest % "it,test",
name := "corp_tools_dataextractor",
version := "0.1",
mainClass in Compile := Some("corp.tools.ExtractionStartUp")
)
lazy val tools_sirf_server = (project in file("tools_sirf_server")).settings(
).enablePlugins(PlayScala).dependsOn(tools_dataextractor)
lazy val root = (project in file("."))
.aggregate(tools_dataextractor, tools_sirf_server)
The configuration looks good.
2 possibilities what the problem might be:
You are in a sbt-console and haven't reloaded the console after you changed build.sbt
You work with Intellij and did not reload the sbt projects
If this does not help - adjust your question with the steps you take.
OK, the answer is neophyte error.
I had a build.sbt in the root and a build.sbt in each sub project (which is permissible).
Everything will built fine.... Until I started adding dependencies from one sub-project to another. In this case, the super build.sbt "dependsOn" is ignored and compilation errors occur.
Side note, the main reason for keeping sub-project build.sbt was simply laziness. It took half a day to get everything working in a single build.sbt at the root level. However, it is defintiely worth the effort.
Related
This is a problem that is really getting on my nerves. I'm writing proofs for the Welder proof assistant. I was doing so without the help of an IDE and following an SBT-based building approach. This is the build file:
name := "proofs"
scalaVersion := "2.11.8"
lazy val welder = RootProject(uri("git://github.com/epfl-lara/welder.git#2b9dd10a7a751777cc9cda543ce888294113c0b1"))
lazy val root = (project in file(".")).dependsOn(welder)
I tried to bring my project into an Intellij Idea project. However, while doing so, the IDE won't recognize the imports of the external library:
import inox._
How can I solve this issue?
Edit
I stress that the compile errors are produced in the files from Welder
Here is the welder project/Build.scala file
import sbt._
object WelderBuild extends Build {
lazy val root = Project("root", file(".")) dependsOn(inoxProject)
lazy val inoxProject = RootProject(uri("git://github.com/epfl-lara/inox.git#53ea4533a957050bd6a968d5a340890bd54998a5"))
}
See my answer to your other question and the issue on the Scala plugin issue tracker.
Renaming the modules and manually adding a dependency from the welder-root to the inox-root module will solve the compile path issue, but the build will still fail because one of the project uses source generators, which are not supported in IDEA directly.
Instead, enable the "use sbt for build and import" option in the sbt preferences:
Following the hints of the post explaining the basics of migrating to scalajs and this page about cross-compilations, I decided to add cross compilation to my standalone dependency-free scala library by doing the following changes:
I added a file project/plugins.sbt with the content
addSbtPlugin("org.scala-js" % "sbt-scalajs" % "0.6.16")
I added scalaVersion in ThisBuild := "2.11.8" in build.sbt because else just scalaVersion was using 2.10
I also added in the build.sbt the following content to ensure that I can keep the same directory structure, since I don't have any particular files for the JVM or for Javascript:
lazy val root = project.in(file(".")).
aggregate(fooJS, fooJVM).
settings(
publish := {},
publishLocal := {}
)
lazy val foo = crossProject.crossType(CrossType.Pure).in(file(".")).
settings(version := "0.1").
jvmSettings(
// Add JVM-specific settings here
).
jsSettings(
// Add JS-specific settings here
)
lazy val fooJVM = foo.jvm
lazy val fooJS = foo.js
But now, after I published the project locally using sbt publish-local the projects depending on this library do not work anymore, i.e. they don't see the classes that this library was offering and raise errors.
I looked into .ivy2/local/.../foo/0.1/jars and the JAR went from 1MB to 1KB, so the errors make sense.
However, how can I make sure the JVM jar file is compiled correctly?
Further informations
The jar time does not change anymore, it looks like there had been some miscompilation. I deleted the .ivy2 cache, but now sbt publish-local always finishes with success but does not regenerate the files.
Ok I found the solution myself.
I needed to remove the publishLocal := {} from the build, and now all the projects depending on my library work fine.
I'm experiencing a problem when running latest play framework 2.3.
It compiles just fine, although when I do activator run this error happens:
java.lang.NoSuchMethodError: scala.Predef$.ArrowAssoc(Ljava/lang/Object;)Ljava/lang/Object;
Full error log
I explicitly tried scalaVersion in every build.sbt file and it is the same.
I tried several things like activator clean, full removal os sbt caches and local repo sbt stuff, updating dependencies to latest version but no success.
I have scala version defined.
My current dependencies are:
I tried with both %% and force _2.11 in the name of the dependency.
Dependency List
Other important files
build.sbt
Common.scala
Dependencies.scala
When I fully clean caches it downloads scala 2.10.4 for no reason:
in this download log it says the sbt need the old scala.
Any idea why is this?
Any ideas?
Firstly, it does not matter which version of Scala is used to generate your build. The build system can use version 2.10.4, and that does not prevent your code from using version 2.11.1.
To look at the issue with your scala version, you should consider that settings added directly in build.sbt are added to the root project, but not to other projects. You can see this with a minimal project such as:
$ cat build.sbt
scalaVersion := "2.11.1"
lazy val subproj = project in (file("subproj"))
Then the output of sbt looks like this:
> show scalaVersion
[info] subproj/*:scalaVersion
[info] 2.10.4
[info] sbttest/*:scalaVersion
[info] 2.11.1
So, how can this be fixed?
We can create a lazy val containing a Seq[Setting[_]], and add it to the sub-project definition with the settings() method.
Here's an example build.sbt which adds the same settings to all projects:
$ cat build.sbt
lazy val root = project.in(file("."))
.aggregate(subproj)
.dependsOn(subproj)
.settings(commonSettings: _*)
lazy val subproj = project.in(file("subproj"))
.settings(commonSettings: _*)
lazy val commonSettings = Seq(
scalaVersion := "2.11.1"
)
The _* is required because settings() is defined as requiring Setting[_]* rather than Seq[Setting[_]], so _* converts between the two types. See also: What does param: _* mean in Scala?
And the output from sbt is:
> show scalaVersion
[info] subproj/*:scalaVersion
[info] 2.11.1
[info] root/*:scalaVersion
[info] 2.11.1
This approach can easily be applied to your build.
You're defining your dependencies in the wrong way.
When using SBT, don't use:
"org.mydep" % "mydep_2.11" % "1.0.0"
Instead use:
"org.mydep" %% "mydep" % "1.0.0"
The %% operator automatically appends the current Scala version of the current build. If you use dependencies built against other Scala versions, you're going to be getting the weird errors.
Also make sure you explicitly specify your Scala version somewhere:
scalaVersion := "2.11.1"
The problem was related to some manually added jars that I discovered in the lib folder, that were causing issues with the dependencies of the project defined in the build.sbt.
The only way to find out was to generate a activator dist and look for similar dependencies with different versions since in the dependency graph there were no conflicts
When using oneJar to package a multi project sbt build, project dependencies are not bundled into the jar. My setting is the following:
foo/build.sbt (top-level build.sbt)
foo/src/ (sources of the root project)
foo/gui/build.sbt (project 'build' definition)
foo/gui/src (sources of the 'gui' project)
The build definitions are:
// foo/build.sbt
name := "foo"
version := "0.0.1"
scalaVersion := "2.10.4"
lazy val root = project.in( file(".") )
lazy val gui = project.in( file("gui") ).dependsOn( root )
[...]
//foo/gui/build.sbt
name := "foo-gui"
seq(com.github.retronym.SbtOneJar.oneJarSettings: _*)
[...]
When calling oneJar on the gui project everything seems to run fine, but the classes of the root project are not included in the jar (although the library dependencies are). Is there any fix ?
I never tried a light configuration as you but shouldn't you put the oneJar settings in the root sbt file? You want to package the root and include guy right?
I tried something similar for the first time today and started with oneJar but when using a full sbt configuration the compiler complained that settings were a Seq(_) and sbt expected a single setting or something like that. I switched to sbt-assembly and it worked.
sbt-oneJar has not been updated for 2 years while sbt-assembly was recently updated. I'm not sure which one is preferred but I'd rather use an active tool.
I am trying to figure out how idea will recognize thrid party dependencies when using SBT. When I use the sbt plugin gen-idea it seems to download all the necessary dependencies which get put into my ~/.ivy/ directory as expected. How can intellij use these deps?
EDIT:
One thing I noticed is if I make a new idea project instead of just a module then this works? Any idea why this would be? I would like to be able to have multiple sbt modules in the same project.
The sbt-idea plugin works with multi-module sbt project. We have been using it since somewhere around sbt-0.10.0, and currently are at sbt-0.11.2. It seems like you have the dependency part of the build file set up ok, so here's an example of how we do the project setup from a full specification Build.scala file:
object Vcaf extends Build {
import Resolvers._
import Dependencies._
import BuildSettings._
lazy val vcafDb = Project(
id = "vcaf-db",
base = file("./vcaf-db"),
dependencies = Seq(),
settings = buildSettings ++ /* proguard */ SbtOneJar.oneJarSettings ++ Seq(libraryDependencies := dbDeps, resolvers := cseResolvers)
)
lazy val vcaf = Project(
"vcaf",
file("."),
dependencies = Seq(vcafDb),
aggregate = Seq(vcafDb),
settings = buildSettings ++ Seq(libraryDependencies := vcafDeps, resolvers := cseResolvers) ++ webSettings
)
}
In the example, the vcaf-db project is in the a folder within the vcaf project folder. The vcaf-db project does not have it's own build.sbt or Build.scala file. You'll notice that we are specifying libraryDependencies for each project, which may or may not be your missing link.
As ChrisJamesC mentioned, you need to do a "reload" from within SBT (or exit sbt and come back in) to pick up changes to your build definition. After the project is reloaded, you should be able to do a "gen-idea no-classifiers no-sbt-classifiers" and get an intellij project that has the main project, modules, and library access as defined in the build file.
Hope it helps!
If you want multiple SBT modules in one IDEA project, you can use sbt multi-project builds (aka subprojects). Just create a master project that refers to the modules as sub-projects, then run gen-idea on the master. To specify dependencies among the modules you have to use Build.scala (not build.sbt), as in jxstanford's answer or like this:
lazy val foo = Project(id = "foo", base = file("foo"))
lazy val bar = Project(id = "bar", base = file("bar")) dependsOn(foo)
One level of subprojects works fine (with the dependencies correctly reflected in the resulting IDEA project), but nested subprojects don't seem to work. Also, it seems to be an sbt restriction that the subprojects must live in subdirectories of the master project (i.e., file("../foo") is not allowed).
See also How to manage multiple interdependent modules with SBT and IntelliJ IDEA?.