jetring-build - applies changesets to produce a keyring
jetring-build [-i|-I] keyring.gpg dir
Applies the changesets in the specified jetring directory in order, to produce a keyring.
-i Only applies changesets added since the last time it was run. -I Applies changesets incrementally if the keyring exists, otherwise does a full rebuild.
Joey Hess, <email@example.com>.