Comments on Scala Blog: maven for scala

Thanks for your article. I was very helpful to me....

2009-04-09T09:34:00.000-07:00

Thanks for your article. I was very helpful to me.

If you're using Eclipse plugIn, you can create Scala Project easily, too.

Plz, check my article, too. thanks. again.

http://kennyground.blogspot.com/2009/04/create-scala-project-using-eclipse.html

Thank you so much; this tutorial was exactly what ...

2009-01-20T15:18:00.000-08:00

Thank you so much; this tutorial was exactly what I needed.

I'm new to both Scala and to Maven, and there were two minor things that had me confused momentarily. I thought I'd just mention them in case they help someone else:

1. After step 1 (creating the project), I had to cd into the project directory in order for the command in step 2 to work. In retrospect, I guess it's obvious that you need to do that.

2. After completing the steps here, I wanted to actually see "my" scala application run. I used this command to do that:

scala -cp ./target/project_name-1.0-SNAPSHOT.jar group_ID.App

A new version maven-archetype-plugin was release i...

2008-02-23T07:46:00.000-08:00

A new version maven-archetype-plugin was release in Feb 2008, the new version (1.0 -> 2.0) break some features. until fixes (in the plugin), use the old version, try (copy/paste):

mvn org.apache.maven.plugins:maven-archetype-plugin:1.0-alpha-7:create \
-DarchetypeGroupId=org.scala-tools.archetypes \
-DarchetypeArtifactId=scala-archetype-simple \
-DarchetypeVersion=1.0 \
-DremoteRepositories=http://scala-tools.org/repo-releases \
-DgroupId=your.proj.gid -DartifactId=your-proj-id

It's not working for me, I get

[INFO] -----...

2008-02-23T07:38:00.000-08:00

It's not working for me, I get

[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] Error creating from archetype

Embedded error: OldArchetype does not exist.
http://repo1.maven.org/maven2/org

Yeah, I agree that maven is better resolving depen...

2008-01-11T04:48:00.000-08:00

Yeah, I agree that maven is better resolving dependencies than sbaz, although sbaz has basic dependency management as far as I can see ("sbaz help pack" shows an option to specify them).

Anyway, your guide is very helpful. Thanks you very much!

Hi,

I don't think maven can using sbaz repo...

2008-01-11T03:34:00.000-08:00

Hi,

I don't think maven can using sbaz repository. But it's possible to developpe an extension to maven to allow it to use sbaz.

I fact, I don't know a lot sbaz (IMHO, the doc a little obscur), so I can't really do a comparison and I could be wrong.
So yes, there is probably a overlap between maven's repository and sbaz (maven's repository are older, and allow access to java library see mvnrepository.com as example).

I don't agree, when you say sbaz manage dependencies, from my understanding, sbaz allow you to upload/dowload library but doesn't manage dependencies. If in the pom.xml of my project, I say I need lib X in version vX, maven take care of the (transitive) dependencies of X, And I don't need to search in the doc or the Manifest of the lib, which other lib I need to install. And if later I upgrade to vX+1 and some dependencies are not more required by lib X, they'll be not added (and I don't need to remove then like with a ant build (without ivy)).

Isn't there an overlap between maven and sbaz when...

2008-01-10T05:54:00.000-08:00

Isn't there an overlap between maven and sbaz when it comes to manage dependencies between scala components? Or is maven capable of using sbaz repositories?

I've managed to compile OSGi bundles with maven an...

2008-01-10T01:26:00.000-08:00

I've managed to compile OSGi bundles with maven and scala-tools.

See http://jeunef.wordpress.com/2008/01/04/osgi-maven-and-scala/

short : Don't worry, this is a "normal" warning.
2008-01-08T01:33:00.000-08:00
short : Don't worry, this is a "normal" warning.
long : archetype use velocity to generate project template. Velocity try replace ${...} by a "predefined/evaluated" value/expression. Maven also use the ${...} syntax in pom.xml to evaluate properties when you build. So when the pom.xml to generate use "properties", the archetype warn about undef expression when it try to generate the pom.xml. Those value are evaluate after the project generation, when you'll use the pom.xml to build your project.

Is it clear ?

Great writeup--I tried running the archetype:creat...

2008-01-08T00:32:00.000-08:00

Great writeup--I tried running the archetype:create command but got the following error
[WARNING] org.apache.velocity.runtime.exception.ReferenceException: reference : template = archetype-resources/pom.xml [line 32,column 16] : ${scala.version} is not a valid reference.

I tried passing scala.version as an argument/system property (-Dscala.version) but that didn't work either. System is Ubuntu Linux, Gutsy. Scala was installed with apt-get. Know how I can fix this?

Thanks
Patrick

Yes, you could use any scala argument (edit your p...

2008-01-07T10:23:00.000-08:00

Yes, you could use any scala argument (edit your pom.xml) :

<plugin>
<groupId>org.scala-tools</groupId>
<artifactId>maven-scala-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>compile</goal>
<goal>testCompile</goal>
</goals>
</execution>
</executions>
<configuration>
<scalaVersion>${scala.version}</scalaVersion>
<args>
<arg>-target:jvm-1.5</arg>
</args>
<jvmArgs>
<jvmArg>-Xmx512m</jvmArg>
<jvmArg>-Xms64m</jvmArg>
</jvmArgs>
</configuration>
</plugin>

(sorry, I don't know how to format comment)

Looks great; can the jvm 1.5 be targeted with the ...

2008-01-07T09:33:00.000-08:00

Looks great; can the jvm 1.5 be targeted with the maven plugin yet?