rc/sh/recombine

#!/usr/bin/env false
# FAKE_COMPAT

cd ~/sh && unset IFS || exit
[ -z "${0##/*}" ] && sh=zsh || sh="${0#-}" # zsh replaces $0, so hardcode it
case "$sh" in
(ash) SH=ASH;;
(bash) SH=BASH;;
(dash) SH=DASH;;
(hush) SH=HUSH;;
(ksh) SH=KSH;;
(loksh) SH=MKSH;; # similar enough to mksh to use the same compatibility flag
(mksh) SH=MKSH;;
(oksh) SH=MKSH;; # similar enough to mksh to use the same compatibility flag
(osh) SH=OSH;;
(posh) SH=POSH;;
(yash) SH=YASH;;
(zsh) SH=ZSH; set -o SH_WORD_SPLIT;;
(*)
    printf >&2 %s\\n "unknown shell (\$0): $0"
    exit 1
esac

printf %s\\n '#!/usr/bin/env false' '[ -n "$preload" ] || exit 1' ''
for f in "${HOME:?}/sh"/*; do
    [ -n "${f##*.*}" ] && [ -f "$f" ] || continue
    i=10 sh=
    while IFS= read -r line; do
        for word in $line; do
            case "$word" in (YES_$SH) sh=1;; (NO_$SH) sh=0;; esac
        done
        [ "$((i-=1))" != 0 ] || break # act like head -n10
    done < "$f"
    [ "$sh" != 1 ] || set -- "$@" "$f"
done
[ $# = 0 ] || cat "$@"