Hi
gevaudan wrote:
> Is there a way to inject dependencies programatically in a maven plugin as
> if
> they were declared in the POM itself? I only found one post discussing
> this and it did not help.
>
> Why do I want to do this?
>
> Assume I have a fruit pom which imports a bom-pom which declares version
> numbers for fruits, vegetables and other artifacts. Example:
>
> fruit pom:
>
> <dependencyManagement>
> <dependencies>
> <dependency>
> <groupId>com</groupId>
> <artifactId>foods</artifactId>
> <version>10.0-SNAPSHOT</version>
> <type>pom</type>
> <scope>import</scope>
> </dependency>
> </dependencies>
> </dependencyManagement>
> <dependencies>
> <dependency>
> <groupid>com</groupId>
> <artifactId>apple</artifactId>
> <classifier>fruit</classifier>
> </dependency>
> <dependency>
> <groupid>com</groupId>
> <artifactId>orange</artifactId>
> <classifier>fruit</classifier>
> </dependency>
> </dependencies>
>
> food pom:
>
> <dependencies>
> <dependency>
> <groupid>com</groupId>
> <artifactId>apple</artifactId>
> <version>1.0-SNAPSHOT</version>
> <classifier>fruit</classifier>
> </dependency>
> <dependency>
> <groupid>com</groupId>
> <artifactId>orange</artifactId>
> <version>2.0-SNAPSHOT</version>
> <classifier>fruit</classifier>
> </dependency>
> <dependency>
> <groupid>com</groupId>
> <artifactId>artichoke</artifactId>
> <version>3.0-SNAPSHOT</version>
> <classifier>vegetable</classifier>
> </dependency>
> <dependency>
> <groupid>com</groupId>
> <artifactId>asparagus</artifactId>
> <version>4.0-SNAPSHOT</version>
> <classifier>vegetable</classifier>
> </dependency>
> </dependencies>
>
> The fruit pom only needs to inject dependencies that have a classifier of
> type fruit. The goal is to do this programatically so user's do not have
> to edit multiple pom files when adding a new dependency.
>
> The real use case is more complicated than this but I hope the above
> example gets at the heart of the question.
>
> I understand I can use the maven model api to read and write poms but that
> seems to require an intermediate step and perhaps a second instance of
> maven
> to be spawned in order to consume the intermediate pom. Ideally I would
> like to avoid this step and inject dependencies programatically into the
> pom
> which declares the plugin-in itself. Is this even possible or is the pom
> immutable?
Look at the following code snippet, it should give you the idea:
================== %< =================
/**
* The maven project.
*
* @parameter expression="${project}"
* @required
* @readonly
* @description "the maven project to use"
*/
private MavenProject project;
/**
* Used to look up Artifacts in the remote repository.
*
* @component role="org.apache.maven.artifact.factory.ArtifactFactory"
* @required
* @readonly
*/
protected ArtifactFactory factory;
/**
* Used to look up Artifacts in the remote repository.
*
* @component role="org.apache.maven.artifact.resolver.ArtifactResolver"
* @required
* @readonly
*/
protected ArtifactResolver resolver;
/**
* Location of the local repository.
*
* @parameter expression="${localRepository}"
* @readonly
* @required
*/
protected ArtifactRepository local;
/**
* List of Remote Repositories used by the resolver
*
* @parameter expression="${project.remoteArtifactRepositories}"
* @readonly
* @required
*/
protected List<?> remoteRepos;
public void execute() throws MojoExecutionException, MojoFailureException
{
List<Artifact> vegetables = new ArrayList<Artifact>();
@SuppressWarnings("unchecked")
final Set<Artifact> dependencies = project.getArtifacts();
if (dependencies != null && !dependencies.isEmpty()) {
for (final Artifact artifact : dependencies) {
if (artifact.getClassifier().equals("vegetable") {
vegetables.add(artifact);
break;
}
}
}
if (vegetables.isEmpty()) {
throw new MojoFailureException("There is no vegetable dependency");
}
for(final Artifact vegetable : vegetables) {
final File vegetable = serviceEjb.getFile();
final Artifact descriptors =
factory.createArtifactWithClassifier(
vegetable.getGroupId(), vegetable.getArtifactId(),
vegetable.getVersion(), "jar", "fruit");
descriptors.setScope(Artifact.SCOPE_PROVIDED);
final String descriptorFileName =
vegetable.getName().substring(0, vegetable.getName().length()
- vegetable.getArtifactHandler().getExtension().length() - 1)
+ "-fruit." + descriptors.getArtifactHandler().getExtension();
final File descriptorsFile = new File(vegetable.getParentFile(),
descriptorFileName);
if (descriptorsFile.isFile()) { // file in current build ?
descriptors.setFile(descriptorsFile);
descriptors.setResolved(true);
} else {
try {
resolver.resolve(descriptors, remoteRepos, local);
} catch (final ArtifactResolutionException e) {
throw new MojoExecutionException("Unable to resolve artifact.", e);
} catch (final ArtifactNotFoundException e) {
throw new MojoExecutionException("Unable to find artifact.", e);
}
}
final File file = descriptors.getFile();
if (!file.isFile()) {
throw new MojoFailureException("Fruit is missing: "
+ file.getAbsolutePath());
}
// do what you have to do
}
}
================== %< =================
Hope this helps,
Jörg
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
