Given a simple Maven project with for example JUnit as dependency, how do I get the full filepath to the junit.jar
inside the local maven repository it will be installed into?!
eg How to get from artifact junit:junit
to /Users/foobar/.m2/repository/junit/junit/4.11/junit-4.11.jar
?
The maven dependency plugin has a goal 'properties'. From documentation :
Goal that sets a property pointing to the artifact file for each project dependency. For each dependency (direct and transitive) a project property will be set which follows the groupId:artifactId:type:[classifier] form and contains the path to the resolved artifact.
So something like this should do the trick:
<properties>
<maven-dependency-plugin.version>3.1.1</maven-dependency-plugin.version>
</properties>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-dependency-plugin</artifactId>
<version>${maven-dependency-plugin.version}</version>
<executions>
<execution>
<phase>initialize</phase>
<goals>
<goal>properties</goal>
</goals>
</execution>
</executions>
</plugin>
Then the property ${junit:junit:jar}
should contain the jar file path
From the following SO answer , it looks like the easiest is to use the antrun plugin.
<plugin>
<artifactId>maven-antrun-plugin</artifactId>
<executions>
<execution>
<phase>process-resources</phase>
<configuration>
<tasks>
<echo>${maven.dependency.junit.junit.jar.path}</echo>
</tasks>
</configuration>
<goals>
<goal>run</goal>
</goals>
</execution>
</executions>
</plugin>
A hacky solution using mvn dependency:build-classpath
and some unix shell magic to extract the jar-path from the classpath.
We have a pom.xml
like this...
<?xml version="1.0" encoding="UTF-8"?>
<project>
<modelVersion>4.0.0</modelVersion>
<groupId>com.mycompany</groupId>
<artifactId>myproject</artifactId>
<version>1.0-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
</dependencies>
</project>
Then we generate a build_classpath
file.
$ mvn dependency:build-classpath -Dmdep.outputFile=build_classpath
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building myproject 1.0-SNAPSHOT
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] --- maven-dependency-plugin:2.8:build-classpath (default-cli) @ myproject ---
[INFO] Wrote classpath file '/Users/foobar/maven-test/build_classpath'.
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.050 s
[INFO] Finished at: 2015-01-23T09:17:40+01:00
[INFO] Final Memory: 11M/245M
[INFO] ------------------------------------------------------------------------
$ cat build_classpath
/Users/foobar/.m2/repository/junit/junit/4.11/junit-4.11.jar:/Users/foobar/.m2/repository/org/hamcrest/hamcrest-core/1.3/hamcrest-core-1.3.jar
Now we can extract the jar file path from build_classpath
using some scripting foo...
$ cat build_classpath | perl -ne 'print "$1" if /(?:^|:)([^:]+?\/junit-[0-9\.]+\.jar)/'
/Users/foobar/.m2/repository/junit/junit/4.11/junit-4.11.jar
The path is build as $repository_dir/groupId/artifactId/version/artifactId-version.jar
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
If you want to get the path inside your running code, you can do this:
POM:
<dependency>
<groupId>com.github.nodyn</groupId>
<artifactId>jvm-npm</artifactId>
<version>a0c3f12</version>
</dependency>
<dependency>
<groupId>org.eclipse.aether</groupId>
<artifactId>aether-impl</artifactId>
<version>1.1.0</version>
</dependency>
<dependency>
<groupId>org.eclipse.aether</groupId>
<artifactId>aether-transport-file</artifactId>
<version>1.1.0</version>
</dependency>
<dependency>
<groupId>org.eclipse.aether</groupId>
<artifactId>aether-connector-basic</artifactId>
<version>1.1.0</version>
</dependency>
<dependency>
<groupId>org.apache.maven</groupId>
<artifactId>maven-aether-provider</artifactId>
<version>3.1.0</version>
</dependency>
Code:
final String mavenRepositoryPath = "c:\\mvn\\repository";
private static RepositorySystem newRepositorySystem() {
DefaultServiceLocator locator = MavenRepositorySystemUtils.newServiceLocator();
locator.addService(RepositoryConnectorFactory.class, BasicRepositoryConnectorFactory.class);
locator.addService(TransporterFactory.class, FileTransporterFactory.class);
locator.setErrorHandler(new DefaultServiceLocator.ErrorHandler() {
@Override
public void serviceCreationFailed(Class<?> type, Class<?> impl, Throwable exception) {
throw new RuntimeException(exception);
}
});
return locator.getService(RepositorySystem.class);
}
private static File getJvmNpmFile() {
Artifact artifact = new DefaultArtifact("com.github.nodyn:jvm-npm:a0c3f12");
DefaultRepositorySystemSession session = new org.eclipse.aether.DefaultRepositorySystemSession();
RepositorySystem system = newRepositorySystem();
ArtifactRequest request = new ArtifactRequest();
request.setArtifact(artifact);
//request.setRepositories(new ArrayList<>( Arrays.asList( new RemoteRepository.Builder( "central", "default", "http://central.maven.org/maven2/" ).build()) ));
//request.setRepositories( new org.eclipse.aether.DefaultRepositorySystemSession().getLocalRepository() );
LocalRepository localRepo = new LocalRepository(mvnRepositoryPath);
session.setLocalRepositoryManager(system.newLocalRepositoryManager(session, localRepo));
ArtifactResult result;
try {
result = system.resolveArtifact(session, request);
} catch (ArtifactResolutionException ex) {
throw new RuntimeException(ex);
}
//System.out.println("Resolved artifact " + artifact + " to " + result.getArtifact().getFile() + " from " + result.getRepository());
return result.getArtifact().getFile();
}
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.