How can I download a specific Maven artifact in one command line?

user_217071 0
Viewed 240905

I can install an artifact by install:install-file, but how can I download an artifact?

For example: 

mvn download:download-file -DgroupId=.. -DartifactId=.. -Dversion=LATEST
maven-2
13 Answers

You could use the maven dependency plugin which has a nice dependency:get goal since version 2.1. No need for a pom, everything happens on the command line.

To make sure to find the dependency:get goal, you need to explicitly tell maven to use the version 2.1, i.e. you need to use the fully qualified name of the plugin, including the version: 

mvn org.apache.maven.plugins:maven-dependency-plugin:2.1:get \
    -DrepoUrl=url \
    -Dartifact=groupId:artifactId:version

UPDATE: With older versions of Maven (prior to 2.1), it is possible to run dependency:get normally (without using the fully qualified name and version) by forcing your copy of maven to use a given version of a plugin.

This can be done as follows:

1. Add the following line within the <settings> element of your ~/.m2/settings.xml file: 

<usePluginRegistry>true</usePluginRegistry>

2. Add the file ~/.m2/plugin-registry.xml with the following contents:

<?xml version="1.0" encoding="UTF-8"?>
<pluginRegistry xsi:schemaLocation="http://maven.apache.org/PLUGIN_REGISTRY/1.0.0 http://maven.apache.org/xsd/plugin-registry-1.0.0.xsd"
xmlns="http://maven.apache.org/PLUGIN_REGISTRY/1.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <plugins>
    <plugin>
      <groupId>org.apache.maven.plugins</groupId>
      <artifactId>maven-dependency-plugin</artifactId>
      <useVersion>2.1</useVersion>
      <rejectedVersions/>
    </plugin>
  </plugins>
</pluginRegistry>

But this doesn't seem to work anymore with maven 2.1/2.2. Actually, according to the Introduction to the Plugin Registry, features of the plugin-registry.xml have been redesigned (for portability) and the plugin registry is currently in a semi-dormant state within Maven 2. So I think we have to use the long name for now (when using the plugin without a pom, which is the idea behind dependency:get).

user_706040

The usage from the official documentation:

https://maven.apache.org/plugins/maven-dependency-plugin/usage.html#dependency:get

For my case, see the answer below:

mvn dependency:get -Dartifact=$2:$3:$4:$5 -DremoteRepositories=$1 -Dtransitive=false
mvn dependency:copy -Dartifact=$2:$3:$4:$5 -DremoteRepositories=$1 -Dtransitive=false -DoutputDirectory=$6

#mvn dependency:get -Dartifact=com.huya.mtp:hynswup:1.0.88-SNAPSHOT:jar -DremoteRepositories=http://nexus.google.com:8081/repository/maven-snapshots/ -Dtransitive=false
#mvn dependency:copy -Dartifact=com.huya.mtp:hynswup:1.0.88-SNAPSHOT:jar -DremoteRepositories=http://nexus.google.com:8081/repository/maven-snapshots/ -Dtransitive=false -DoutputDirectory=.

Use the command mvn dependency:get to download the specific artifact and use the command mvn dependency:copy to copy the downloaded artifact to the destination directory -DoutputDirectory.

user_23106700

maven command: if you use maven, you can use dependency:copy to download the artifact to the local folder.

mvn dependency:copy -Dartifact=groupId:artifactId:version[:packaging[:classifier]] -DoutputDirectory=<your local path>. -U

Refer: https://maven.apache.org/plugins/maven-dependency-plugin/copy-mojo.html

Curl command:

# guide: https://help.sonatype.com/repomanager3/rest-and-integration-api/search-api

# https://msnexus.xxxx.com/service/rest/v1/search/assets?sort=version&repository=public&maven.groupId=<groupId>&maven.artifactId=<>&maven.baseVersion=1.46.0-SNAPSHOT&maven.extension=war

download_artifact() {
    local host_url=$1
    local group_id=$2
    local artifact_id=$3
    local artifact_type=$4
    local artifact_version=$5
    local final_name=$6
    local location=$7

    local search_version=$5
    local prerelease="false"
    if [[ "${artifact_version}" == *"SNAPSHOT" ]]; then
        prerelease="true"
    fi
    if [[ "${artifact_version}" == "latest"* ]]; then
        search_version="*"
    fi
    assets_url="${host_url}/service/rest/v1/search/assets?sort=version&repository=public&maven.groupId=${group_id}&maven.artifactId=${artifact_id}&maven.baseVersion=${search_version}&prerelease=${prerelease}&maven.extension=${artifact_type}"

    echo "INFO: Assets url: $assets_url"

    download_url=$(curl "$assets_url" -H "accept: application/json" | jq -r ".items[0].downloadUrl // empty")

    echo "INFO: Downloading artifact from url: $download_url"

    if [[ -z "$download_url" ]]; then
        echo "ERROR: Artifact not exists in Nexus, please check your version [${version}] for [${service_name}]"
        exit 1
    fi

    pre_dir=$(pwd)

    if [[ ! -d "$location" ]]; then
        mkdir -p $location
    fi

    cd $location

    curl -o "${final_name}.${artifact_type}" "$download_url"

    cd $pre_dir
}
user_114116380

To copy artifact in specified location use copy instead of get.

mvn org.apache.maven.plugins:maven-dependency-plugin:3.1.2:copy \
  -DrepoUrl=someRepositoryUrl \
  -Dartifact="com.acme:foo:RELEASE:jar" -Dmdep.stripVersion -DoutputDirectory=/tmp/
user_5161670

Here's an example to get ASM-7 using Maven 3.6:

mvn dependency:get -DremoteRepositories=maven.apache.org -Dartifact=org.ow2.asm:7.0:sources:jar

Or you can download the jar from here: https://search.maven.org/search?q=g:org.ow2.asm%20AND%20a:asm and then

mvn install:install-file -DgroupId=org.ow2.asm -DartifactId=asm -Dversion=7.0 -Dclassifier=sources -Dpackaging=jar -Dfile=/path/to/asm-7.0.jar
user_7887000

You can also do this using docker in PowerShell:

docker run -it --rm -v ${PWD}:/build/source -v ${HOME}/.m2:/build/.m2 --net=host aemdesign/centos-java-buildpack:jdk8 /bin/bash --login -c 'mvn dependency:get -Dmaven.repo.local=/build/.m2/repository -DrepoUrl=https://repo1.maven.org/maven2 -Dartifact=io.prometheus.jmx:jmx_prometheus_javaagent:LATEST -Ddest=/build/source/jmx_prometheus_javaagent.jar'

or in bash:

docker run -it --rm -v $PWD:/build/source -v $HOME/.m2:/build/.m2 --net=host aemdesign/centos-java-buildpack:jdk8 /bin/bash --login -c 'mvn dependency:get -Dmaven.repo.local=/build/.m2/repository -DrepoUrl=https://repo1.maven.org/maven2 -Dartifact=io.prometheus.jmx:jmx_prometheus_javaagent:LATEST -Ddest=/build/source/jmx_prometheus_javaagent.jar'
user_23323370

The command:

mvn install:install-file

Typically installs the artifact in your local repository, so you shouldn't need to download it. However, if you want to share your artifact with others, you will need to deploy the artifact to a central repository see the deploy plugin for more details.

Additionally adding a dependency to your POM will automatically fetch any third-party artifacts you need when you build your project. I.e. This will download the artifact from the central repository.

user_2162870

LATEST is deprecated, try with range [,)

./mvnw org.apache.maven.plugins:maven-dependency-plugin:3.1.1:get \  
-DremoteRepositories=repoId::default::https://nexus/repository/maven-releases/ \
"-Dartifact=com.acme:foo:[,)"
user_5161670
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