fish-shell/share/functions/__fish_describe_command.fish

#
# This function is used internally by the fish command completion code
#

# Perform this check once at startup rather than on each invocation
if not type -q apropos
    function __fish_describe_command
    end
    exit
end

function __fish_describe_command -d "Command used to find descriptions for commands"
    # $argv will be inserted directly into the awk regex, so it must be escaped
    set -l argv_regex (string escape --style=regex -- "$argv")
    __fish_apropos ^$argv 2>/dev/null | awk -v FS=" +- +" '{
		split($1, names, ", ");
		for (name in names)
			if (names[name] ~ /^'"$argv_regex"'.* *\([18]\)/ ) {
				sub( "( |\t)*\\\([18]\\\)", "", names[name] );
				sub( " \\\[.*\\\]", "", names[name] );
				print names[name] "\t" $2;
			}
	}'
end