What does mvn install in maven exactly do

Question

I just started using Maven and I was told to do mvn install in a specific directory     What does mvn install do  exactly   I think it looks for pom xml in the current folder and starts following the instructions specified in that file  Is that correct

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It s important to point out that install and install install are different things  install is a phase  in which maven do more than just install current project modules artifacs to local repository  it check remote repository first  On the other hand  install install is a goal  it just build your current project and install all it s artifacts to local repository  e g  into the  m2 directory

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It will run all goals of all configured plugins associated with any phase of the default lifecycle up to the  install  phase   https   maven apache org guides introduction introduction-to-the-lifecycle html Lifecycle Reference

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Have you looked at any of the Maven docs  for example  the maven install plugin docs    Nutshell version  it will build the project and install it in your local repository

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mvn install primary jobs are to 1 Download The Dependencies and 2 Build The Project  while job 1 is nowadays taken care by IDs like intellij  they download for any dependency at POM   mvn install is majorly now used for job 2

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At any stage of maven build life cycle  all the previous goals are performed  Ex  mvn install will invoke mvn validate  mvn compile  mvn test  mvn package etc

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As you might be aware of  Maven is a build automation tool provided by Apache which does more than dependency management  We can make it as a peer of Ant and Makefile which downloads all of the dependencies required   On a mvn install  it frames a dependency tree based on the project configuration pom xml on all the sub projects under the super pom xml  the root POM  and downloads compiles all the needed components in a directory called  m2 under the user s folder  These dependencies will have to be resolved for the project to be built without any errors  and mvn install is one utility that could download most of the dependencies   Further  there are other utils within Maven like dependency resolve which can be used separately in any specific cases  The build life cycle of the mvn is as below  LifeCycle Bindings   process-resources compile process-test-resources test-compile test package install deploy   The test phase of this mvn can be ignored by using a flag -DskipTests true

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-DskipTests true is short form of -Dmaven test skip true  Make changes in Setting xml in your  m2 folder  You can use link to local repo so that the jars once downlaoded should not be downloaded again and again    lt url gt file   C  Users admin  m2 repository lt  url gt    lt  repository gt

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Short answer  mvn install  adds all artifact  dependencies  specified in pom  to the local repository  from remote sources

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The install install goal is provided by   Apache Maven Install Plugin        Apache Maven Install Plugin      The Install Plugin is used during the install phase to add artifact s  to the local repository  The Install Plugin uses the information in the POM  groupId  artifactId  version  to determine the proper location for the artifact within the local repository       The local repository is the local cache where all artifacts needed for the build are stored  By default  it is located within the user s home directory     m2 repository  but the location can be configured in    m2 settings xml using the  lt localRepository gt  element           Apache Maven Install Plugin - Introduction    Having said that  the exact goal purpose      install install is used to automatically install the project s main artifact  the JAR  WAR or EAR   its POM and any attached artifacts  sources  javadoc  etc  produced by a particular project           Apache Maven Install Plugin - Introduction    For additional details on the goal  please refer to the Apache Maven Install Plugin - install install page   For additional details on the build lifecycle in general and on which place the goal has in the build lifecycle  please refer to the Maven     Introduction to the Build Lifecycle page

[java] What does mvn install in maven exactly do

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