Error on installing project via maven command.
Unresolveable build extension: Plugin com.day.jcr.vault:content-package-maven-plugin:1.0.2 or one of its dependencies could not be resolved: Failure to find com.day.jcr.vault:content-package-maven-plugin:jar:1.0.2 in https://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced -> [Help 2]
[ERROR] Unknown packaging: content-package @ com.abc.aem.dam:abc.ui.content:[unknown-version], C:\Users\aanchalsikka\Projects\ABC\abc-dam\ui.content\pom.xml, line 34, column 16
Fix:
Use profile adobe-public in you maven command.Example: mvn clean install -PautoInstallPackage,adobe-public
A best practice is to add an adobe-public profile to your Maven settings.xml file in order to automatically add repo.adobe.com to the maven build process.
For details on how to configure settings.xml visit link
Adobe Experience Manager Blog 