/usr/share/bash-completion/completions/icinga2 is in icinga2-common 2.6.0-2+deb9u1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 | _icinga2()
{
local cur opts
opts="${COMP_WORDS[*]}"
cur="${COMP_WORDS[COMP_CWORD]}"
COMPREPLY=($(icinga2 --autocomplete $COMP_CWORD ${COMP_WORDS[*]} < /dev/null))
case $COMPREPLY in
*/|*=)
compopt -o nospace
;;
esac
return 0
}
complete -F _icinga2 icinga2
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