Hello,
I am still banging my head on this problem, though I got a bit farther.
I found a link via Google pointing to the maven site plugin and there
to the
DefaultMavenReportExecutor. I have tried to mimick the behavior in my
special
case and for testing I want to invoke the maven dependency plugin,
namely
the unpack dependencies goal.
It seems to work if I provide all the missing paramters (like project
etc.) into
the configuration as expressions as follows
val config : Xpp3Dom = Xpp3DomUtils.mergeXpp3Dom(
buildConfiguration(
Map(
"outputDirectory" -> "test",
"project" -> "${project}",
"local" -> "${localRepository}",
"reactorProjects" -> "${reactorProjects}" ,
"remoteRepos" -> "${project.remoteArtifactRepositories}"
)
),
convert(md)
)
That approach doesn't give me any Exceptions. I would have expected
that all parameters except the non-default output directory
would be resolved as the dependency plugin gives default expressions
for them.
However, this approach removes the parameter exceptions from before,
but calling it doesn't unpack the dependencies (nothing happens really).
I have tried to use the
LifecycleExecutor.executeForkedExecutions
BuildPluginManager.executeMojo
and even tried to call execute on the configured Mojo (which I
probably shouldn't do ?)
I have attached a sample build output and also the code of my scala
based mojo.
Apart from studying the source code of the API and some sample
plugins, is there documentation how the
new plugin API is supposed to work ?
Am I trying to do something out of the ordinary here ? (I know I
could configure the dependency plugin in the
pom but as this is *such* an essential step in the final mojo I don't
want to give the user the option of leaving it
out ... and I wanted to learn some more maven internals).
Has anyone an example of initializing and calling a mojo from within
a mojo using the new API ? - Java is fine as
well, I can adopt it to scala as a learning exercise.
I think I might be missing something in terms of hooking up or
registering the project with the dependency plugin
though the build output indicates that the project is referenced
correctly.
Any hints would be really appreciated; if I am hitting the wrong
list, please let me know.
Thanks in advance
Andreas
Am 10/13/10 9:27 AM, schrieb Andreas Gies:
Hello Maveners ,
mainly for self learning purposes I am trying to build some plugins
for Maven 3 using the Scala language.
One of the things I had going before (Maven 2 & Java based) is to
invoke another plugin programmatically.
Now I am trying to invoke the dependency plugin, namely the
unpack-dependencies goal and am running
into a rather cryptic error message:
[ERROR] Failed to execute goal
com.progress.maven.plugins:plugin-sandbox:8.0-SNAPSHOT:echo
(default-cli) on project test-plugin: The parameters 'proje
ct', 'local', 'remoteRepos', 'reactorProjects' for goal
org.apache.maven.plugins:maven-dependency-plugin:2.1:unpack-dependencies
are missing or invali
d -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to
execute goal
com.progress.maven.plugins:plugin-sandbox:8.0-SNAPSHOT:echo (default-cl
i) on project test-plugin: The parameters 'project', 'local',
'remoteRepos', 'reactorProjects' for goal
org.apache.maven.plugins:maven-dependency-plugin:2.1:unpack-dependencies
are missing or invalid
at
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:157)
at
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:88)
at
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:80)
at
org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:87)
at
org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
at
org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
at
org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
at
org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:315)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:152)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:445)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:168)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:132)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
at
org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
at
org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
at
org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: org.apache.maven.plugin.PluginParameterException: The
parameters 'project', 'local', 'remoteRepos', 'reactorProjects' for
goal
org.apache.maven.plugins:maven-dependency-plugin:2.1:unpack-dependencies
are missing or invalid
at
org.apache.maven.plugin.internal.DefaultMavenPluginManager.populatePluginFields(DefaultMavenPluginManager.java:514)
at
org.apache.maven.plugin.internal.DefaultMavenPluginManager.getConfiguredMojo(DefaultMavenPluginManager.java:467)
at
org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:96)
at de.woq.maven.plugins.TestMojo.execute(TestMojo.scala:109)
at
org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:107)
at
org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
... 19 more
It seems that the current project is not passed correctly to the
plugin. I have noticed that the API for invoking plugins has
slightly changed, but was unable to get more information.
Any hints where to dig deeper would be greatly appreciated.
For completeness here is the code of my plugin so far .... (As I
said its a learning exercise :))
/*
* Copyright (C) 2010, Way of Quality
* All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package de.woq.maven.plugins
import org.apache.maven.plugin._
import descriptor.MojoDescriptor
import org.scala_tools.maven.mojo.annotations._
import org.apache.maven.project.MavenProject
import org.apache.maven.execution.MavenSession
import org.apache.maven.model.Plugin
import scala.collection.JavaConversions._
import org.codehaus.plexus.component.annotations.Requirement
import org.codehaus.plexus.util.xml.Xpp3Dom
@goal("echo")
@phase("process-sources")
@requiresProject
class TestMojo extends AbstractMojo {
@readOnly @parameter @expression("${project}")
var project : MavenProject = _
@readOnly @parameter @expression("${session}")
var session : MavenSession = _
@Requirement
var pluginManager: BuildPluginManager = _
private def getBuildPlugin(groupId: String, artifactId: String,
version: Option[String]) = {
List.fromIterator(project.getBuildPlugins.iterator).asInstanceOf[List[Plugin]]
.filter(
p => (p.getGroupId.equals(groupId)) &&
(p.getArtifactId.equals(artifactId) && (version == None ||
p.getVersion.equals(version)))
)
}
def resolvePluginManager = {
session.getContainer.lookup("org.apache.maven.plugin.BuildPluginManager").asInstanceOf[BuildPluginManager]
}
def buildConfiguration(params: Map[String, String]): Xpp3Dom = {
var config = new Xpp3Dom("configuration")
for{
key <- params.keys
value = params.get(key)
} {
var child = new Xpp3Dom(key)
child.setValue(
params.get(key) match {
case Some(v) => v
case None => ""
}
)
config.addChild(child)
}
println(config.toUnescapedString)
config
}
override def execute = {
val plugins = getBuildPlugin("org.apache.maven.plugins",
"maven-dependency-plugin", None)
assert(plugins.length == 1, "Found " + plugins.length + "
plugins for dependdency resolution, expected 1")
val dep: Plugin = plugins.head
getLog.info("==============================")
// needed as component injection seems to be broken in scala
plugins ...
pluginManager = resolvePluginManager
assert(project != null)
assert(session != null)
assert(pluginManager != null)
var config : Xpp3Dom = buildConfiguration(Map("outputDirectory"
-> "test"))
var md : MojoDescriptor = pluginManager.getMojoDescriptor(
dep, "unpack-dependencies",
project.getRemotePluginRepositories, session.getRepositorySession
)
var execution : MojoExecution = new MojoExecution(md, config)
assert(md != null)
pluginManager.executeMojo(session, execution) // <==== fails
here ....
getLog.info("==============================")
}
}
Thanks and best regards
Andreas
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