identity

macOS command line tool example of using Collaboration Framework's Identity classes using Swift. Inspiration and partial port of Privileges' MTIdentity class

$ ./identity 
identity: macOS command line utility that checks users group memberships and group guids

         Usage:
         identity <group_name>               Get gid based on group name
         identity <user_name> <gid>          Check (true/false) if user belongs to a group

You can test the tool by listing macOS's users and groups using these commands:

$ dscl . list /users

$ dscl . list /groups

Examples:

./identity admin
80

./identity myuser 80
true

./identity nonexistent
No such group