#!/bin/sh
set -e

# DISCLAIMER
# Don't ever think of installing every single package generated with this script.
# While it *should* not cause any problems, doing so is simply overkill, untested, and not recommended in the least.

if [ "$#" -lt 2 ]; then
    echo "Usage: $0 <slackware> <slackware64> [whitelist]" 1>&2
    exit 1
fi

scriptdir="$(realpath "$(dirname "$0")")"

slackware="$1"
slackware64="$2"
whitelist="$3"

find "$slackware" -type f -name "*.t?z" -printf '%P\n' | sort | while read -r pkg; do
    # See /sbin/installpkg
    pkgbase="$(echo "$pkg" | sed -e 's?.*/??;s/\.t[bglx]z$//')"
    pkgext="$(echo "$pkg" | sed -e 's?.*/??;s/.*\.\(t[bglx]z\)$/\1/')"
    pkgname="$(echo "$pkgbase" | sed -e 's?-[^-]*-[^-]*-[^-]*$??')"
    pkgver="$(echo "$pkgbase" | sed -e 's?.*-\([^-]*\)-[^-]*-[^-]*$?\1?')"
    pkgarch="$(echo "$pkgbase" | sed -e 's?.*-[^-]*-\([^-]*\)-[^-]*$?\1?')"

    if [ "$whitelist" ]; then
        if ! grep -v '^#' "$whitelist" | fgrep -xq "$pkgname"; then
            continue
        fi
    fi

    case "$pkgarch" in
        i?86) pkgarch=x86_64 ;;
        # Architecture-independent stuff
        noarch|fw) continue ;;
        # Only kernel-headers uses x86 as pkgarch. That doesn't need conversion.
        x86) continue ;;
        *)
            echo "WARNING: Package '$pkg' has an unsupported architecture: '$pkgarch'"
            exit
            ;;
    esac

    if [ ! -f "$slackware64/$(dirname "$pkg")/$pkgname-$pkgver-$pkgarch-"*".$pkgext" ]; then
        echo "WARNING: Package '$pkg' doesn't exist in slackware64, or there were multiple with different build versions."
        continue
    fi

    rpkg="$(realpath "$slackware/$pkg")"
    rpkg64="$(realpath "$slackware64/$(dirname "$pkg")/$pkgname-$pkgver-$pkgarch-"*".$pkgext")"

    mkdir -p "$(dirname "$pkg")"

    ( cd "$(dirname "$pkg")"
        "$scriptdir/convert32pkg.sh" "$rpkg" "$rpkg64"
    )
done