kiss/contrib/kiss-orphans

#!/bin/sh -e
# List orphaned packages

n='
'

cd "$KISS_ROOT/var/db/kiss/installed"
set -- *

l=$n$(
    for pkg do shift
        set -- "$@" -e "$pkg"
    done

    # Get a list of non-orphans.
    grep -Fx "$@" -- */depends |

    {
        # Strip filename.
        sed s,.\*/depends:,,

        # Exclude packages which are not really orphans.
        printf '%s\n' baseinit baselayout busybox bzip2 e2fsprogs gcc \
                      git grub kiss make musl
    } |

    # Remove duplicates.
    sort -u
)$n

# Generate the list of orphans by finding the inverse of the non-orphan list.
for pkg do shift
    case $l in (*"$n$pkg$n"*)
        continue
    esac

    set -- "$@" "$pkg"
done

printf '%s\n' "$@"