[MNG-1525] Allow environment variables to be referenced in pom.xml, settings.xml, etc.

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0
• Fix Version/s: 2.0.1
• Environment: Red Hat Linux, Java 5, Maven 2
• Assignee: John Dennis Casey
• Reporter: Richard Allen
• Created: 11/Nov/05 13:23
• Updated: 23/Dec/08 11:55
• Resolved: 06/Dec/05 10:28

Description

Maven should allow environment variables to be referenced; similar to Java System properties. Ant allows this to be done using the following syntax:

<property environment="env"/>
${env.CATALINA_BASE}

where CATALINA_BASE has been defined like:

export CATALINA_BASE=$HOME/tomcat

In Maven, an example use for signing jars might be:

<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<executions>
<execution>
<goals>
<goal>sign</goal>
</goals>
</execution>
</executions>
<configuration>
<keystore>${env.KEYSTORE_FILE}</keystore>
<storepass>${env.KEYSTORE_PASS}</storepass>
<alias>${env.KEYSTORE_ALIAS}</alias>
<jarPath>${project.build.directory}/${project.build.finalName}.jar</jarPath>
</configuration>
</plugin>

where KEYSTORE_FILE, KEYSTORE_PASS, and KEYSTORE_ALIAS are environment variables.

It would also be very useful to have environment variables available when defining filter properties files. For instance:

1. application.properties
   deploy.dir=${env.CATALINA_BASE}/webapps

Environment variables can be referenced in Java like:

Map<String, String> environmentVariables = java.lang.System.getenv();

Issue Links

• relates to: MNG-3940 Interpolation of environment variables is not case-insensitive on Windows