Upload/Download entire directory to Nexus through Maven

Question

Is it possible to upload/download an entire directory and all of the sub-directories within it to/from a Nexus repository server?

Answer 1

In case you want to actually deploy a hierarchy of files, I hacked together a solution using GMaven (groovy embedded in maven).

Use the pom below, supply a few properties and hit mvn install. The folder will be crawled and all files inside it will be deployed using an artifactId taken from the relative path. e.g.

Given the base folder

c:\a\b\c

the file

c:\a\b\c\def\ghi\jkl.mno

would have the artifactId def-ghi-jkl and the packaging mno, this can of course be changed to something else.

The repository info will be taken from the pom, so you need to supply a distributionManagement element in the pom.

Here it is (a lot of this code is taken from the deploy:deploy-file mojo):

<project
    xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.mycompany</groupId>
    <artifactId>folderdeployer</artifactId>
    <packaging>jar</packaging>
    <version>SNAPSHOT</version>

    <properties>
        <!-- This is where your artifacts are -->
        <deploy.basefolder>c:\temp\stuff</deploy.basefolder>

        <!-- This will be used as groupId -->
        <deploy.groupId>my.groupid</deploy.groupId>

        <!-- this will be used as version -->
        <deploy.version>1.2.3</deploy.version>
    </properties>
    <build>
        <plugins>

            <plugin>
                <groupId>org.codehaus.groovy.maven</groupId>
                <artifactId>gmaven-plugin</artifactId>
                <version>1.0</version>
                <dependencies>
                    <dependency>
                        <groupId>commons-io</groupId>
                        <artifactId>commons-io</artifactId>
                        <version>1.4</version>
                    </dependency>
                </dependencies>
                <executions>
                    <execution>
                        <id>deploy-files</id>
                        <phase>prepare-package</phase>
                        <goals>
                            <goal>execute</goal>
                        </goals>
                        <configuration>
                            <source>
                            <![CDATA[
// read components from plexus container             
def layout = session.lookup(
    'org.apache.maven.artifact.repository.layout.ArtifactRepositoryLayout');
def repoFactory = session.lookup(
    'org.apache.maven.artifact.repository.ArtifactRepositoryFactory');
def repository = repoFactory.createDeploymentArtifactRepository(
    pom.distributionManagement.repository.id,
    pom.distributionManagement.repository.url,
    layout, true );
def localRepository = session.localRepository;
def helper =
    session.lookup("org.apache.maven.project.MavenProjectHelper");
def afm = session.lookup(
    'org.apache.maven.artifact.handler.manager.ArtifactHandlerManager');
def factory = new org.apache.maven.artifact.factory.DefaultArtifactFactory();
factory.class.getDeclaredField("artifactHandlerManager").accessible = true;
factory.artifactHandlerManager=afm;

def deployer = session.lookup(
    'org.apache.maven.artifact.deployer.ArtifactDeployer');

// initialize properties
def baseFolder = new File(pom.properties['deploy.basefolder']);
def groupId = pom.properties['deploy.groupId'];
def version = pom.properties['deploy.version'];

// iterate over all files recursively
baseFolder.eachFileRecurse{
    if(it.isDirectory())return;

    // packaging = file.extension
    def packaging = it.name.replaceAll( /.+\./ , '' );
    // artifactId = file.relativePath.replace '/' , '-'
    def artifactId = it.absolutePath
        .replace(baseFolder.absolutePath, '')
        .substring(1)
        .replaceFirst( /\..*?$/ , '')
        .replaceAll( /\W+/ , '-' );
    def artifact = 
        factory.createBuildArtifact( 
            groupId, artifactId, version, packaging );

    // create pom for artifact
    def model = new org.apache.maven.model.Model();
    model.setModelVersion( "4.0.0" );
    model.setGroupId( groupId );
    model.setArtifactId( artifactId );
    model.setVersion( version );
    model.setPackaging( packaging );
    File pomFile = File.createTempFile( "mvndeploy", ".pom" );
    pomFile.deleteOnExit();
    fw = org.codehaus.plexus.util.WriterFactory.newXmlWriter( pomFile );
    new org.apache.maven.model.io.xpp3.MavenXpp3Writer().write( fw, model );
    org.apache.commons.io.IOUtils.closeQuietly( fw );

    def metadata = 
        new org.apache.maven.project.artifact.ProjectArtifactMetadata(
                    artifact, pomFile );
    artifact.addMetadata( metadata );

    // deploy file
    deployer.deploy(it, artifact, repository, localRepository );
}
                                    ]]>
                            </source>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

    <distributionManagement>
        <repository>
            <id>your repo id here</id>
            <url>scp://your.repo.url/here</url>
            <layout>default</layout>
        </repository>
    </distributionManagement>

</project>

---

EDIT:

I elaborated on this on my blog