CODEWITHSUNDEEP
maven-2build-processdependencies
IttayD
IttayD

Reputation: 29163

How to get a dependency tree for an artifact?

dependency:tree can be used to see the dependency tree for a given project. But what I need is to see the dependency tree for a 3rd party artifact.

I guess I can create an empty project, but I'm looking for something easier (I need to do this for several artifacts).

Upvotes: 329

Views: 809626

Answers (11)

amra
amra

Reputation: 16935

1) Use maven dependency plugin

Create a simple project with pom.xml only. Add your dependency and run:

mvn dependency:tree

(Version for multi-module Maven project: mvn compile dependency:tree )

Unfortunately dependency mojo must use pom.xml or you get following error:

Cannot execute mojo: tree. It requires a project with an existing pom.xml, but the build is not using one.

2) Find pom.xml of your artifact in maven central repository

Dependencies are described In pom.xml of your artifact. Find it using maven infrastructure.

Go to https://central.sonatype.com and enter your groupId and artifactId.

Or you can go to https://repo1.maven.org/maven2/ and navigate first using plugins groupId, later using artifactId and finally using its version.

For example see org.springframework:spring-core

3) Use maven dependency plugin against your artifact

Part of dependency artifact is a pom.xml. That specifies it's dependency. And you can execute mvn dependency:tree -f <your-pom-filename> on this pom.

Upvotes: 452

Harald
Harald

Reputation: 5163

To just quickly see for an artifact what we are buying into, independent of a project, this script can be used:

#!/bin/bash
# Idea from: https://stackoverflow.com/a/31097420/2954288
# single argument must be the URL of a pom
pomUrl=$1

dir=$(mktemp --tmpdir -d showMavenTree-XXX)
cd "$dir"
wget "$pomUrl" -O pom.xml

## more fancy things can be added by reading
## https://maven.apache.org/plugins/maven-dependency-plugin/tree-mojo.html
mvn dependency:tree -DoutputFile=pom.dot -DoutputType=dot -Dscope=compile

dot -Tsvg -Grankdir=LR <pom.dot >pom.svg
xdg-open pom.svg

Upvotes: 0

Sarz
Sarz

Reputation: 1976

If you are using a local repository use -s settings.xml along with it. Below is what worked for me:

mvn clean compile install -s settings.xml
mvn dependency:tree -s settings.xml

Upvotes: 1

Azhwani
Azhwani

Reputation: 129

You can filter a specific artifact using the -Dincludes flag:

mvn dependency:tree -Dincludes=<artifact>

You can find more information here

Upvotes: 4

rns
rns

Reputation: 1091

If anyone using IntelliJ wants to see dependency tree directly in IDE then they can install Maven Helper Plugin plugin.

Once installed open pom.xml and you would able to see Dependency Analyze tab like below. It also provides option to see dependency that is conflicted only and also as a tree structure.

enter image description here

Upvotes: 18

Kayvan Tehrani
Kayvan Tehrani

Reputation: 3210

If you bother creating a sample project and adding your 3rd party dependency to that, then you can run the following in order to see the full hierarchy of the dependencies.

You can search for a specific artifact using this maven command:

mvn dependency:tree -Dverbose -Dincludes=[groupId]:[artifactId]:[type]:[version]

According to the documentation:

where each pattern segment is optional and supports full and partial * wildcards. An empty pattern segment is treated as an implicit wildcard.

Imagine you are trying to find 'log4j-1.2-api' jar file among different modules of your project:

mvn dependency:tree -Dverbose -Dincludes=org.apache.logging.log4j:log4j-1.2-api

more information can be found here.

Edit: The verbose flag has been reintroduced in version 3.2.0. You can use the specific version as below:

mvn org.apache.maven.plugins:maven-dependency-plugin:3.2.0:tree -Dverbose=true

Upvotes: 108

Philippe Marschall
Philippe Marschall

Reputation: 4604

The for-artifact goal of the depgraph-maven-plugin should do what you want. To get a dependency graph of org.jboss.ws:jbossws-common-tools:1.3.2.Final you simply do

mvn com.github.ferstl:depgraph-maven-plugin:3.3.0:for-artifact -DgroupId=org.jboss.ws -DartifactId=jbossws-common-tools -Dversion=1.3.2.Final -DgraphFormat=text -DshowGroupIds=true -DshowVersions=true

and you get

org.jboss.ws:jbossws-common-tools:1.3.2.Final:compile
+- org.jboss.ws:jbossws-api:1.1.2.Final:compile
+- org.apache.ant:ant:1.7.1:provided
|  \- org.apache.ant:ant-launcher:1.7.1:provided
+- gnu.getopt:java-getopt:1.0.13:provided
+- log4j:log4j:1.2.14:provided
\- junit:junit:3.8.2:test

without the need to create a Maven project or use and IDE or online app.

Upvotes: 8

Vaiden
Vaiden

Reputation: 16142

When using IntelliJ, you have a one-click tool for Maven dependency exploration: https://www.jetbrains.com/help/idea/work-with-maven-dependencies.html

Results: enter image description here

Upvotes: 6

Matthias M
Matthias M

Reputation: 14950

The solution is to call dependency:tree with the artifact's pom.xml file:

mvn -f "$HOME/.m2/repository/$POM_PATH" dependency:tree

See also How to list the transitive dependencies of an artifact from a repository?

Upvotes: 22

Pascal Thivent
Pascal Thivent

Reputation: 570635

If your artifact is not a dependency of a given project, your best bet is to use a repository search engine. Many of them describes the dependencies of a given artifact.

Upvotes: 1

Sean Patrick Floyd
Sean Patrick Floyd

Reputation: 299218

If you use a current version of m2eclipse (which you should if you use eclipse and maven):

Select the menu entry

Navigate -> Open Maven POM

and enter the artifact you are looking for.

The pom will open in the pom editor, from which you can select the tab Dependency Hierarchy to view the dependency hierarchy (as the name suggests :-) )

Upvotes: 6

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