[0.9] Issue with plugins

[Heiko Seeberger]

Hi,

When creating a plugin for SBT 0.9, the POM contains a dependency to the exact SBT version, the plugin was created with. An example taken from sbteclipse:

    ...

    <dependencies>

        <dependency>

            <groupId>org.scala-tools.sbt</groupId>

            <artifactId>sbt_2.8.1</artifactId>

            <version>0.9.7</version>

            <scope>compile</scope>

        </dependency>

        ...

This makes it impossible to use it with SBT 0.9.8 or SBT 0.9.9-SNAPSHOT or possibly at all:

[warn] ::::::::::::::::::::::::::::::::::::::::::::::

[warn] ::          UNRESOLVED DEPENDENCIES         ::

[warn] ::::::::::::::::::::::::::::::::::::::::::::::

[warn] :: org.scala-tools.sbt#sbt_2.8.1;0.9.7: not found

[warn] ::::::::::::::::::::::::::::::::::::::::::::::

Question: Would it be possible that the dependency to sbt is omitted?

Heiklo

--

Heiko Seeberger

Twitter: hseeberger
Blog: heikoseeberger.name

[Vasil Remeniuk]

Hi Heiko,

Same problem here. I have to make cross-builds of sbt-netbeans-plugin for each next version of sbt.

--Vasil

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[Heiko Seeberger]

Looks like you can work around it with this little trick:

pomPostProcess := { (pom: scala.xml.Node) =>

  import scala.xml._

  import scala.xml.transform._

  val rewriteRule = new RewriteRule {

    override def transform(n: Node) = n match {

      case elem @ Elem(_, "dependency", _, _, _*) if ((elem \ "groupId").text == "org.scala-tools.sbt") && ((elem \ "artifactId").text startsWith "sbt_")  => NodeSeq.Empty

      case other => other

    }

  }

  new RuleTransformer(rewriteRule)(pom)

}

Heiko

[Mark Harrah]

Heiko, Vasil,

It is quite unlikely 0.9.x is going to be binary (or even source) compatible between versions. Because the configuration system is not based on inheritance anymore, it is more likely compatibility can be preserved going forward (i.e. for 0.10.x). However, until there is reliable tooling to detect binary incompatibilities, I would hesitate to use a plugin compiled for one version of sbt with another version.

Previously, plugins were distributed as source so this wasn't a problem. There is still the ability to compile plugins from source using the external projects feature. It would be nicer if there was less configuration overhead to this, but I don't have any ideas on that right now.

-Mark

[Heiko Seeberger]

Mark,

So we have to publish plugins for each SBT version we want to release, i.e. cross-build plugins. And using a cross-built plugin is not facilitated by something like %% for the Scala cross-builds. Correct?

Heiko

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[Artyom Olshevskiy]

But you can always do like I described in my web plugin:

libraryDependencies <<= (libraryDependencies, appConfiguration) {
(deps, app) =>
deps :+ "com.github.siasia" %% "xsbt-web-plugin" % app.provider.id.version
}

Just ensure that the artifacts are built against the version.

[Artyom Olshevskiy]

And by the way something like following can also be implemented:

"organization" %% "module" %% "version"

where second two percent signs mean append sbt version to module version.

[Mark Harrah]

I added sbtVersion as a convenience, so you can do:

libraryDependencies <+= sbtVersion( v =>
"com.github.siasia" %% "xsbt-web-plugin" % v
)

-Mark

[Mark Harrah]

On Fri, 27 May 2011 21:39:29 +0200
Heiko Seeberger <heiko.s...@googlemail.com> wrote:
> Mark,
>
> So we have to publish plugins for each SBT version we want to release, i.e.
> cross-build plugins. And using a cross-built plugin is not facilitated by
> something like %% for the Scala cross-builds. Correct?

I wouldn't worry about cross-building for 0.9.x. There are things we can do to mitigate this problem, but I don't plan on looking at it until after 0.10.0.

-Mark