You can create an offline copy of the update site using the eclipse mirroring application which is built into Eclipse. The generated update site will include all released versions of the Nexus IQ Eclipse plugin.
The commands you need to run are:
- eclipse -nosplash -verbose -application org.eclipse.equinox.p2.artifact.repository.mirrorApplication -source https://download.sonatype.com/clm/eclipse/releases -destination file:/home/someuser/temp
- eclipse -nosplash -verbose -application org.eclipse.equinox.p2.metadata.repository.mirrorApplication -source https://download.sonatype.com/clm/eclipse/releases -destination file:/home/someuser/temp
Change the location of the destination directory (shown above as "/home/someuser/temp") as appropriate. If the destination directory does not exist it will be created.
See the Equinox p2 Repository Mirroring guide for more information.