This plugin can be built with Buck and Maven.
From gerrit source directory:
buck build plugins/avatars/external:avatars-external
You will find the avatars-external.jar
file in buck-out/gen/plugins/avatars/external
.
From the plugin directory:
mvn clean package
You will find the external-url-avatar-provider-1.0-SNAPSHOT.jar
file in target
directory in the plugin directory.