# vim: set ts=4 sw=4 et:
#
setup_pkg_depends() {
    local pkg="$1" j _pkgdepname _pkgdep _rpkgname _depname _replacement

    if [ -n "$pkg" ]; then
        # subpkg
        if declare -f ${pkg}_package >/dev/null; then
            ${pkg}_package
        fi
    fi

    for j in ${depends}; do
        _rpkgname="${j%\?*}"
        _depname="${j#*\?}"
        _pkgdepname="$($XBPS_UHELPER_CMD getpkgdepname ${_depname} 2>/dev/null)"
        if [ -z "${_pkgdepname}" ]; then
            _pkgdepname="$($XBPS_UHELPER_CMD getpkgname ${_depname} 2>/dev/null)"
        fi
        if [ -s ${XBPS_DISTDIR}/etc/virtual ]; then
            _replacement=$(egrep "^${_pkgdepname:-${_depname}}[[:blank:]]" ${XBPS_DISTDIR}/etc/virtual|cut -d ' ' -f2)
            if [ -n "${_replacement}" ]; then
                _depname="${_depname/${_pkgdepname:-${_depname}}/${_replacement}}"
            fi
        elif [ -s ${XBPS_DISTDIR}/etc/defaults.virtual ]; then
            _replacement=$(egrep "^${_pkgdepname:-${_depname}}[[:blank:]]" ${XBPS_DISTDIR}/etc/defaults.virtual|cut -d ' ' -f2)
            if [ -n "${_replacement}" ]; then
                _depname="${_depname/${_pkgdepname:-${_depname}}/${_replacement}}"
            fi
        fi
        if [ -z "${_pkgdepname}" ]; then
            _pkgdep="${_depname}>=0"
        else
            _pkgdep="${_depname}"
        fi

        if [ "${_rpkgname}" = "virtual" ]; then
            run_depends+=" virtual?${_pkgdep}"
        else
            run_depends+=" ${_pkgdep}"
        fi
    done
    for j in ${hostmakedepends}; do
        _depname="${j%\?*}"
        if [ -s ${XBPS_DISTDIR}/etc/virtual ]; then
            _replacement=$(egrep "^${_depname}[[:blank:]]" ${XBPS_DISTDIR}/etc/virtual|cut -d ' ' -f2)
            if [ -n "${_replacement}" ]; then
                _depname="${_depname/${_depname}/${_replacement}}"
            fi
        elif [ -s ${XBPS_DISTDIR}/etc/defaults.virtual ]; then
            _replacement=$(egrep "^${_depname}[[:blank:]]" ${XBPS_DISTDIR}/etc/defaults.virtual|cut -d ' ' -f2)
            if [ -n "${_replacement}" ]; then
                _depname="${_depname/${_depname}/${_replacement}}"
            fi
        fi
        host_build_depends+=" ${_depname}-$(srcpkg_get_version ${_depname})"
    done
    for j in ${makedepends}; do
        _depname="${j%\?*}"
        if [ -s ${XBPS_DISTDIR}/etc/virtual ]; then
            _replacement=$(egrep "^${_depname}[[:blank:]]" ${XBPS_DISTDIR}/etc/virtual|cut -d ' ' -f2)
            if [ -n "${_replacement}" ]; then
                _depname="${_depname/${_depname}/${_replacement}}"
            fi
        elif [ -s ${XBPS_DISTDIR}/etc/defaults.virtual ]; then
            _replacement=$(egrep "^${_depname}[[:blank:]]" ${XBPS_DISTDIR}/etc/defaults.virtual|cut -d ' ' -f2)
            if [ -n "${_replacement}" ]; then
                _depname="${_depname/${_depname}/${_replacement}}"
            fi
        fi
        build_depends+=" ${_depname}-$(srcpkg_get_version ${_depname})"
    done
}

# Install a required package dependency, like:
#
#	xbps-install -Ay <pkgname>
#
# Returns 0 if package already installed or installed successfully.
# Any other error number otherwise.
#
install_pkg_from_repos() {
    local pkg="$1" cross="$2" rval= tmplogf=

    tmplogf=${XBPS_STATEDIR}/xbps_${XBPS_TARGET_MACHINE}_bdep_${pkg}.log

    if [ -n "$cross" ]; then
        $XBPS_INSTALL_XCMD -Ayd "$pkg" >$tmplogf 2>&1
    else
        $XBPS_INSTALL_CMD -Ayd "$pkg" >$tmplogf 2>&1
    fi
    rval=$?
    if [ $rval -ne 0 -a $rval -ne 17 ]; then
        # xbps-install can return:
        #
        # SUCCESS  (0): package installed successfully.
        # ENOENT   (2): package missing in repositories.
        # ENXIO    (6): package depends on invalid dependencies.
        # EEXIST  (17): package already installed.
        # ENODEV  (19): package depends on missing dependencies.
        # ENOTSUP (95): no repositories registered.
        #
        [ -z "$XBPS_KEEP_ALL" ] && remove_pkg_autodeps
        msg_red "$pkgver: failed to install '$1' dependency! (error $rval)\n"
        cat $tmplogf
        msg_error "Please see above for the real error, exiting...\n"
    fi
    [ $rval -eq 17 ] && rval=0
    return $rval
}

#
# Returns 0 if pkgpattern in $1 is matched against current installed
# package, 1 if no match and 2 if not installed.
#
check_pkgdep_matched() {
    local pkg="$1" checkver="$2" cross="$3" uhelper= pkgn= iver=

    [ "$build_style" = "meta" ] && return 2
    [ -z "$pkg" ] && return 255

    pkgn="$($XBPS_UHELPER_CMD getpkgdepname ${pkg} 2>/dev/null)"
    if [ -z "$pkgn" ]; then
        pkgn="$($XBPS_UHELPER_CMD getpkgname ${pkg} 2>/dev/null)"
    fi
    [ -z "$pkgn" ] && return 255

    if [ -n "$cross" ]; then
        uhelper="$XBPS_UHELPER_XCMD"
    else
        uhelper="$XBPS_UHELPER_CMD"
    fi

    iver="$($uhelper $checkver $pkgn)"
    if [ $? -eq 0 -a -n "$iver" ]; then
        $XBPS_UHELPER_CMD pkgmatch "${pkgn}-${iver}" "${pkg}"
        [ $? -eq 1 ] && return 0
    else
        return 2
    fi

    return 1
}

#
# Returns 0 if pkgpattern in $1 is installed and greater than current
# installed package, otherwise 1.
#
check_installed_pkg() {
    local pkg="$1" cross="$2" uhelper= pkgn= iver=

    [ -z "$pkg" ] && return 2

    pkgn="$($XBPS_UHELPER_CMD getpkgname ${pkg})"
    [ -z "$pkgn" ] && return 2

    if [ -n "$cross" ]; then
        uhelper="$XBPS_UHELPER_XCMD"
    else
        uhelper="$XBPS_UHELPER_CMD"
    fi

    iver="$($uhelper version $pkgn)"
    if [ $? -eq 0 -a -n "$iver" ]; then
        $XBPS_CMPVER_CMD "${pkgn}-${iver}" "${pkg}"
        [ $? -eq 0 -o $? -eq 1 ] && return 0
    fi

    return 1
}

srcpkg_get_version() {
    local pkg="$1"
    # Run this in a sub-shell to avoid polluting our env.
    (
        unset XBPS_BINPKG_EXISTS
        setup_pkg $pkg || return $?
        echo "${version}_${revision}"
    ) || return $?
}

srcpkg_get_pkgver() {
    local pkg="$1"
    # Run this in a sub-shell to avoid polluting our env.
    (
        unset XBPS_BINPKG_EXISTS
        setup_pkg $pkg || return $?
        echo "${sourcepkg}-${version}_${revision}"
    ) || return $?
}

#
# Installs all dependencies required by a package.
#
install_pkg_deps() {
    local pkg="$1" targetpkg="$2" target="$3" cross="$4" cross_prepare="$5"
    local rval _realpkg curpkgdepname pkgn iver
    local i j found rundep repo

    local -a host_binpkg_deps binpkg_deps host_missing_deps missing_deps missing_rdeps

    [ -z "$pkgname" ] && return 2

    setup_pkg_depends

    if [ "$pkg" != "$targetpkg" ]; then
        msg_normal "$pkgver: building (dependency of $targetpkg) ...\n"
    else
        msg_normal "$pkgver: building ...\n"
    fi

    if [ -z "$build_depends" -a -z "$host_build_depends" -a -z "$run_depends" ]; then
        return 0
    fi

    #
    # Host build dependencies.
    #
    for i in ${host_build_depends}; do
        check_pkgdep_matched "$i" version
        local rval=$?
        if [ $rval -eq 0 ]; then
            echo "   [host] ${i}: installed."
            continue
        elif [ $rval -eq 1 ]; then
            echo "   [host] ${i}: unresolved (must be updated) ..."
            return 1
        else
            repo=$($XBPS_QUERY_CMD -R -prepository ${i} 2>/dev/null)
            if [ -n "${repo}" ]; then
                echo "   [host] ${i}: found ($repo)"
                host_binpkg_deps+=("${i}")
                continue
            else
                echo "   [host] ${i}: not found."
            fi
        fi
        host_missing_deps+=("${i}")
    done

    #
    # Target build dependencies.
    #
    for i in ${build_depends}; do
        _realpkg="$($XBPS_UHELPER_CMD getpkgname $i 2>/dev/null)"
        # Check if dependency is a subpkg, if it is, ignore it.
        unset found
        for j in ${subpackages}; do
            [ "$j" = "${_realpkg}" ] && found=1 && break
        done
        [ -n "$found" ] && continue
        check_pkgdep_matched "${i}" version $cross
        local rval=$?
        if [ $rval -eq 0 ]; then
            echo "   [${rundep:-target}] ${i}: installed."
            continue
        elif [ $rval -eq 1 ]; then
            echo "   [${rundep:-target}] ${i}: unresolved (must be updated) ..."
            return 1
        else
            repo=$($XBPS_QUERY_XCMD -R -prepository ${i} 2>/dev/null)
            if [ -n "${repo}" ]; then
                echo "   [${rundep:-target}] ${i}: found ($repo)"
                binpkg_deps+=("${i}")
                continue
            else
                echo "   [${rundep:-target}] ${i}: not found."
            fi
        fi
        missing_deps+=("${i}")
    done

    #
    # Target run time dependencies
    #
    for i in ${run_depends}; do
        _realpkg="${i%\?*}"
        if [ "${_realpkg}" = "virtual" ]; then
            # ignore virtual dependencies
            echo "   [runtime] ${i#*\?}: virtual dependency."
            continue
        fi
        pkgn=$($XBPS_UHELPER_CMD getpkgdepname "${_realpkg}")
        if [ -z "$pkgn" ]; then
            pkgn=$($XBPS_UHELPER_CMD getpkgname "${_realpkg}")
            if [ -z "$pkgn" ]; then
                msg_error "$pkgver: invalid runtime dependency: ${_realpkg}\n"
            fi
        fi
        # Check if dependency is a subpkg, if it is, ignore it.
        unset found
        for j in ${subpackages}; do
            [ "$j" = "${pkgn}" ] && found=1 && break
        done
        [ -n "$found" ] && continue
        _props=$($XBPS_QUERY_XCMD -R -ppkgver,repository ${_realpkg} 2>/dev/null)
        if [ -n "${_props}" ]; then
            set -- ${_props}
            $XBPS_UHELPER_CMD pkgmatch ${1} "${_realpkg}"
            if [ $? -eq 1 ]; then
                echo "   [runtime] ${_realpkg}: found ($2)"
                shift 2
                continue
            else
                echo "   [runtime] ${_realpkg}: not found."
            fi
            shift 2
        else
            echo "   [runtime] ${_realpkg}: not found."
        fi
        missing_rdeps+=("${_realpkg}")
    done

    # Host missing dependencies, build from srcpkgs.
    for i in ${host_missing_deps[@]}; do
        # packages not found in repos, install from source.
        (
        curpkgdepname=$($XBPS_UHELPER_CMD getpkgname "$i" 2>/dev/null)
        setup_pkg $curpkgdepname
        exec env XBPS_BINPKG_EXISTS=1 $XBPS_LIBEXECDIR/build.sh $sourcepkg $pkg $target || exit $?
        ) || exit $?
        host_binpkg_deps+=("$i")
    done

    # Target missing dependencies, build from srcpkgs.
    for i in ${missing_deps[@]}; do
        # packages not found in repos, install from source.
        (
        curpkgdepname=$($XBPS_UHELPER_CMD getpkgname "$i" 2>/dev/null)
        setup_pkg $curpkgdepname $cross
        exec env XBPS_BINPKG_EXISTS=1 $XBPS_LIBEXECDIR/build.sh $sourcepkg $pkg $target $cross $cross_prepare || exit $?
        ) || exit $?
        binpkg_deps+=("$i")
    done

    # Target runtime missing dependencies, build from srcpkgs.
    for i in ${missing_rdeps[@]}; do
        # packages not found in repos, install from source.
        (
        curpkgdepname=$($XBPS_UHELPER_CMD getpkgdepname "$i" 2>/dev/null)
        if [ -z "$curpkgdepname" ]; then
            curpkgdepname=$($XBPS_UHELPER_CMD getpkgname "$i" 2>/dev/null)
            if [ -z "$curpkgdepname" ]; then
                curpkgdepname="$i"
            fi
        fi
        setup_pkg $curpkgdepname $cross
        exec env XBPS_BINPKG_EXISTS=1 $XBPS_LIBEXECDIR/build.sh $sourcepkg $pkg $target $cross $cross_prepare || exit $?
        ) || exit $?
    done

    if [ "$pkg" != "$targetpkg" ]; then
        msg_normal "$pkg: building (dependency of $targetpkg) ...\n"
    fi

    for i in ${host_binpkg_deps[@]}; do
        msg_normal "$pkgver: installing host dependency '$i' ...\n"
        install_pkg_from_repos "${i}"
    done

    for i in ${binpkg_deps[@]}; do
        msg_normal "$pkgver: installing target dependency '$i' ...\n"
        install_pkg_from_repos "$i" $cross
    done
}