grep for lines that contain multiple patterns in any order, using 2 passes of grep

mgrep

#!/bin/zsh

re1="^($(
	for i in "${@[@]}" ;
		do echo -n "(?=.*($i).*\$)" ;
	done
))"

re2="($(
	echo "${(F)@}" | paste -s -d '|'
))"

# echo "re1=\"$re1\"" >&2
# echo "re2=\"$re2\"" >&2
# If this is run with argument `a b`, then:
# re1="^((?=.*(a).*$)(?=.*(b).*$))"
# re2="(a|b)"

< /dev/stdin | grep -P "$re1" | grep -P --color=auto "$re2"