How Can I Inject a Dependency from a Relative JAR Path in Maven?

Maven: Dependency Injection Using a Relative JAR Path

Adding a proprietary JAR to a Maven project as a dependency without storing it in a repository can be complex. However, this approach allows for seamless compilation and execution of Maven commands without requiring developers to manually add it to a repository.

Solution:

To achieve this, create a local repository within the project and install the JAR using the install:install-file plugin. Configure the plugin to specify the local repository path. Do not use the system scope for the dependency.

Steps:

1. Declare a local repository in the pom.xml:

<repositories>
  <repository>
    <id>my-local-repo</id>
    <url>file://${project.basedir}/my-repo</url>
  </repository>
</repositories>

2. Install the JAR in the local repository using the install:install-file plugin:

mvn org.apache.maven.plugins:maven-install-plugin:2.3.1:install-file \
-Dfile=<path-to-file> -DgroupId=<myGroup> \ 
-DartifactId=<myArtifactId> -Dversion=<myVersion> \
-Dpackaging=<myPackaging> -DlocalRepositoryPath=<path>

3. Declare the dependency in the pom.xml:

<dependency>
  <groupId>your.group.id</groupId>
  <artifactId>3rdparty</artifactId>
  <version>X.Y.Z</version>
</dependency>

Benefits:

• Avoids the need for developers to manually add the JAR to a repository.
• Ensures seamless compilation and execution of Maven commands.
• Treats the dependency as a "good citizen" during assembly or other operations.

Note:

• Consider using a corporate repository for better dependency management in enterprise environments.

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