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fish-shell/share/functions/__fish_complete_group_ids.fish

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function __fish_complete_group_ids --description "Complete group IDs with group name as description"
if command -sq getent
getent group | string replace -f -r '^([[:alpha:]_][^:]*):[^:]*:(\d+).*' '$2\t$1'
else if test -r /etc/group
string replace -f -r '^([[:alpha:]_][^:]*):[^:]*:(\d+).*' '$2\t$1' </etc/group
end
end