#!/bin/bash
# vim: set ts=4 sw=4 et:

print_cross_targets() {
    local f
    for f in common/cross-profiles/*.sh; do
        f=${f%.sh}; f=${f##*/}; printf "\t$f\n"
    done
}

usage() {
    cat << _EOF
$PROGNAME: [options] <target> [arguments]

Targets: (only one may be specified)

binary-bootstrap [arch]
    Install bootstrap packages from host repositories into <masterdir>.
    If the optional 'arch' argument is set, it will install bootstrap packages
    from this architecture, and its required xbps utilities. The <masterdir>
    will be initialized for chroot operations.

bootstrap
    Build and install from source the bootstrap packages into <masterdir>.

bootstrap-update
    Updates bootstrap packages with latest versions available from registered
    repositories in the XBPS configuration file.

consistency-check
    Runs a consistency check on all packages

chroot
    Enter to the chroot in <masterdir>.

clean-repocache
    Removes obsolete packages from <hostdir>/repocache.

fetch <pkgname>
    Download package source distribution file(s).

extract <pkgname>
    Extract package source distribution file(s) into the build directory.
    By default set to <masterdir>/builddir.

patch <pkgname>
    Patch the package sources and perform other operations required to
    prepare a package for configuring and building

configure <pkgname>
    Configure a package (fetch + extract + patch + configure).

build <pkgname>
    Build package source (fetch + extract + patch + configure + build).

check <pkgname>
    Run the package check(s) after building the package source.

install <pkgname>
    Install target package into <destdir> but not building the binary package
    and not removing build directory for inspection purposes.

pkg <pkgname>
    Build binary package for <pkgname> and all required dependencies.

clean [pkgname]
    Removes auto dependencies, cleans up <masterdir>/builddir and <masterdir>/destdir.
    If <pkgname> argument is specified, package files from <masterdir>/destdir and its
    build directory in <masterdir>/buiddir are removed.

list
    Lists installed packages in <masterdir>.

remove <pkgname>
    Remove target package from <destdir>. If <pkgname>-<version> is not matched
    from build template nothing is removed.

remove-autodeps
    Removes all package dependencies that were installed automatically.

purge-distfiles
    Removes all obsolete distfiles in <hostdir>/sources.

show <pkgname>
    Show information for the specified package.

show-avail <pkgname>
    Returns 0 if package can be built for the given architecture,
    any other error otherwise.

show-build-deps <pkgname>
    Show required build dependencies for <pkgname>.

show-deps <pkgname>
    Show required run-time dependencies for <pkgname>. Package must be
    installed into destdir.

show-files <pkgname>
    Show files installed by <pkgname>. Package must be installed into destdir.

show-hostmakedepends <pkgname>
    Show required host build dependencies for <pkgname>.

show-makedepends <pkgname>
    Show required target build dependencies for <pkgname>.

show-options <pkgname>
    Show available build options by <pkgname>.

show-shlib-provides <pkgname>
    Show list of provided shlibs for <pkgname>. Package must be installed into destdir.

show-shlib-requires <pkgname>
    Show list of required shlibs for <pkgname>. Package must be installed into destdir.

show-var <var>
    Prints the value of <var> if it's defined in xbps-src.

show-repo-updates
    Prints the list of outdated packages in XBPS repositories.

show-sys-updates
    Prints the list of outdated packages in your system.

sort-dependencies <pkg> <pkgN+1> ...
    Given a list of packages specified as additional arguments, a sorted dependency
    list will be returned to stdout.

update-bulk
    Rebuilds all packages in the system repositories that are outdated.

update-sys
    Rebuilds all packages in your system that are outdated and updates them.

update-check <pkgname>
    Check upstream site of <pkgname> for new releases.

update-hash-cache
    Update the hash cache with existing source distfiles.

zap
    Removes a masterdir but preserving ccache, distcc and host directories.

Options:

-1  If dependencies of target package are missing, fail instead of building them.

-a  <target>
    Cross compile packages for this target machine. Supported targets:

$(print_cross_targets)

-c  <configuration>
    If specified, etc/conf.<configuration> will be used as the primary config
    file name; etc/conf will only be attempted if that does not exist.

-C  Do not remove build directory, automatic dependencies and
    package destdir after successful install.

-E  If a binary package exists in a local repository for the target package,
    do not try to build it, exit immediately.

-f  Force running the specified stage (configure/build/install/pkg)
    even if it ran successfully.

-G  Enable XBPS_USE_GIT_REVS (see etc/defaults.conf for more information).

-g  Enable building -dbg packages with debugging symbols.

-H  <hostdir>
    Absolute path to a directory to be bind mounted at <masterdir>/host.
    The host directory stores binary packages, sources and package dependencies
    downloaded from remote repositories.
    If unset defaults to void-packages/hostdir.

-h  Usage output.

-I  Ignore required dependencies, useful for extracting/fetching sources.

-i  Make xbps-src internal errors non-fatal.

-j  Number of parallel build jobs to use when building packages.

-L  Disable ASCII colors.

-m  <masterdir>
    Absolute path to a directory to be used as masterdir.
    The masterdir is the main directory to build/store/compile packages.
    If unset defaults to void-packages/masterdir.

-N  Disable use of remote repositories to resolve dependencies.

-o  <opt,~opt2,...>
    Enable or disable (prefixed with ~) package build options. If 'etc/conf'
    already specifies some, it is merged. Keep in mind that these options
    apply to all packages within the build, as in if a dependency needs to
    be built, it will inherit these options.

    Supported options can be shown with the 'show-options' target.

-p  <variable,variable2,...>
    For show target, show specified variables in addition to default ones.
    Variable is split and each word is printed in separate line by default.
    In order to print the whole value in one line, append asterisk to variable name.

-Q  Enable running the check stage.

-q  Suppress informational output of xbps-src (build output is still printed).

-r  <repo>
    Use an alternative local repository to store generated binary packages.
    If unset defaults to <hostdir>/binpkgs. If set the binpkgs will
    be stored into <hostdir>/binpkgs/<repo>.
    This alternative repository will also be used to resolve dependencies
    with highest priority order than others.

-t  Create a temporary masterdir to not pollute the current one. Note that
    the existing masterdir must be fully populated with binary-bootstrap first.
    Once the target has finished, this temporary masterdir will be removed.
    This flag requires xbps-uchroot(1), and won't work on filesystems that don't
    support overlayfs.

-V  Print version of xbps, then exit.

_EOF
}

check_reqhost_utils() {
    local broken

    [ "$IN_CHROOT" ] && return 0

    for f in ${REQHOST_UTILS}; do
        if ! command -v ${f} &>/dev/null; then
            echo "${f} is missing in your system, can't continue!" 1>&2
            broken=1
        fi
    done
    [ "$broken" ] && exit 1
    [ -z "$1" ] && return 0

    for f in ${REQHOST_UTILS_BOOTSTRAP}; do
        if ! command -v ${f} &>/dev/null; then
            echo "${f} is missing in your system, can't continue!" 1>&2
            broken=1
        fi
    done
    [ "$broken" ] && exit 1
}

check_build_requirements() {
    local found

    case "$XBPS_TARGET" in
        *bootstrap*) found=1;;
        *) ;;
    esac
    if [ -z "$found" ]; then
        xbps-uhelper cmpver "$XBPS_VERSION" "$XBPS_VERSION_REQ"
        if [ $? -eq 255 ]; then
            echo "ERROR: requires xbps>=${XBPS_VERSION_REQ}" 1>&2
            echo "Bootstrap packages must be updated with 'xbps-src bootstrap-update'" 1>&2
            exit 1
        fi
    fi
}

chroot_check() {
    if [ -f $XBPS_MASTERDIR/.xbps_chroot_init -o "$XBPS_CHROOT_CMD" = "ethereal" ]; then
        export CHROOT_READY=1
    fi
}

check_native_arch() {
    if [ "$CHROOT_READY" ]; then
        if [ -s $XBPS_MASTERDIR/.xbps_chroot_init ]; then
            export XBPS_ARCH=$(<$XBPS_MASTERDIR/.xbps_chroot_init)
        else
            export XBPS_ARCH=$(xbps-uhelper arch)
        fi
    else
        LDD=$(ldd --version 2>&1|head -1)
        if [[ $LDD == *musl* ]]; then
            export XBPS_ARCH=${XBPS_MACHINE%-musl}-musl
        else
            # XBPS_ARCH == $(uname -m)
            export XBPS_ARCH=$(uname -m)
        fi
    fi
}

masterdir_zap() {
    rm -rf "$XBPS_MASTERDIR"
    mkdir -p "$XBPS_MASTERDIR"
    msg_normal "xbps-src: $XBPS_MASTERDIR masterdir cleaned up.\n"
}

exit_func() {
    wait
    if [ "$sourcepkg" ]; then
        remove_pkg $XBPS_CROSS_BUILD
    fi
    if [ -z "$IN_CHROOT" ]; then
        msg_red "xbps-src: a failure has occurred! exiting...\n"
    fi
    exit 2
}

read_pkg() {
    if [ -z "${XBPS_TARGET_PKG}" ]; then
        [ ! -r ./template ] && msg_error "xbps-src: missing build template in $(pwd).\n"
        XBPS_TARGET_PKG=${PWD##*/}
    fi
    setup_pkg "$XBPS_TARGET_PKG" "$XBPS_CROSS_BUILD" "$1"
}

setup_distfiles_mirror() {
    local mirror scheme path

    # Scheme file:// mirror locations only work with uchroot or proot
    for mirror in $XBPS_DISTFILES_MIRROR; do
        scheme="file"
        if [[ "$mirror" == *://* ]]; then
            scheme="${mirror%%://*}"
            path="${mirror#${scheme}://}"
        else
            path="$mirror"
        fi
        [ "$scheme" != "file" ] && continue
        if [ "$XBPS_CHROOT_CMD" == "uchroot" -o "$XBPS_CHROOT_CMD" == "proot" ]; then
            if [ ! -d "$path" ]; then
                msg_warn "xbps-src: Invalid path in XBPS_DISTFILES_MIRROR ($mirror)\n"
                continue
            fi
            mkdir -p "$XBPS_MASTERDIR/$path"
            XBPS_CHROOT_CMD_ARGS+=" -b $path:$path"
        else
            msg_warn "xbps-src: File URLs ($mirror) don't work with '$XBPS_CHROOT_CMD'\n"
        fi
    done
}

#
# main()
#
readonly PROGNAME="${0##*/}"
readonly XBPS_VERSION_REQ="0.55"
XBPS_VERSION=$(xbps-uhelper -V)
XBPS_VERSION=${XBPS_VERSION%%API*}
XBPS_VERSION=${XBPS_VERSION##*:}
readonly XBPS_SRC_VERSION="113"
export XBPS_MACHINE=$(xbps-uhelper -C /dev/null arch)

XBPS_OPTIONS=
XBPS_OPTSTRING="1a:c:CEfgGhH:iIj:Lm:No:p:qQr:tV"

# Preprocess arguments in order to allow options before and after XBPS_TARGET.
eval set -- $(getopt "$XBPS_OPTSTRING" "$@");

# Options are saved as XBPS_ARG_FOO instead of XBPS_FOO for now; this is
# because configuration files may override those and we want arguments to
# take precedence over configuration files
while getopts "$XBPS_OPTSTRING" opt; do
    case $opt in
        1) XBPS_ARG_BUILD_ONLY_ONE_PKG=yes; XBPS_OPTIONS+=" -1";;
        a) XBPS_ARG_CROSS_BUILD="$OPTARG"; XBPS_OPTIONS+=" -a $OPTARG";;
        c) XBPS_ARG_CONFIG="$OPTARG"; XBPS_OPTIONS+=" -c $OPTARG";;
        C) XBPS_ARG_KEEP_ALL=1; XBPS_OPTIONS+=" -C";;
        E) XBPS_ARG_BINPKG_EXISTS=1; XBPS_OPTIONS+=" -E";;
        f) XBPS_ARG_BUILD_FORCEMODE=1; XBPS_OPTIONS+=" -f";;
        G) XBPS_ARG_USE_GIT_REVS=1; XBPS_OPTIONS+=" -G";;
        g) XBPS_ARG_DEBUG_PKGS=1; XBPS_OPTIONS+=" -g";;
        H) XBPS_ARG_HOSTDIR="$OPTARG"; XBPS_OPTIONS+=" -H $OPTARG";;
        h) usage && exit 0;;
        i) XBPS_ARG_INFORMATIVE_RUN=1; XBPS_OPTIONS+=" -i";;
        I) XBPS_ARG_SKIP_DEPS=1; XBPS_OPTIONS+=" -I";;
        j) XBPS_ARG_MAKEJOBS="$OPTARG"; XBPS_OPTIONS+=" -j $OPTARG";;
        L) export NOCOLORS=1; XBPS_OPTIONS+=" -L";;
        m) XBPS_ARG_MASTERDIR="$OPTARG"; XBPS_OPTIONS+=" -m $OPTARG";;
        N) XBPS_ARG_SKIP_REMOTEREPOS=1; XBPS_OPTIONS+=" -N";;
        o) XBPS_ARG_PKG_OPTIONS="$OPTARG"; XBPS_OPTIONS+=" -o $OPTARG";;
        p) XBPS_ARG_PRINT_VARIABLES="$OPTARG"; XBPS_OPTIONS+=" -p $OPTARG";;
        q) XBPS_ARG_QUIET=1; XBPS_OPTIONS+=" -q";;
        Q) XBPS_ARG_CHECK_PKGS=1; XBPS_OPTIONS+=" -Q";;
        r) XBPS_ARG_ALT_REPOSITORY="$OPTARG"; XBPS_OPTIONS+=" -r $OPTARG";;
        t) XBPS_ARG_TEMP_MASTERDIR=1; XBPS_OPTIONS+=" -t -C";;
        V) echo "xbps-src-$XBPS_SRC_VERSION $(xbps-uhelper -V)" && exit 0;;
        --) shift; break;;
    esac
done
shift $(($OPTIND - 1))

[ $# -eq 0 ] && usage && exit 1

# Check if stdout is a tty; if false disable colors.
test -t 1 || export NOCOLORS=1
# http://no-color.org
if [ "${NO_COLOR+x}" ]; then
    export NOCOLORS=1
fi

# sane umask
umask 022

#
# Check for required utilities in host system.
#
# Required utilities in host system for the bootstrap target.
readonly REQHOST_UTILS_BOOTSTRAP="file objdump find make gawk bash sed gcc g++ gnat \
    perl bsdtar gzip patch flock pkg-config"

# Required utilities in host.
readonly REQHOST_UTILS="xbps-install xbps-query xbps-rindex xbps-uhelper \
    xbps-reconfigure xbps-remove xbps-create xbps-uchroot xbps-uunshare"

check_reqhost_utils

#
# Set XBPS_CONFIG_FILE, XBPS_DISTDIR, XBPS_MASTERDIR
# and XBPS_HOSTDIR.
#
if [ "$IN_CHROOT" ]; then
    readonly XBPS_CONFIG_FILE=/etc/xbps/xbps-src.conf
    readonly XBPS_DISTDIR=/void-packages
    readonly XBPS_MASTERDIR=/
    readonly XBPS_HOSTDIR=/host
else
    _distdir="$(readlink -f ${0%/*})"
    if [ "${_distdir}" = "." ]; then
        readonly XBPS_DISTDIR="$(pwd -P)"
    else
        readonly XBPS_DISTDIR="${_distdir}"
    fi
    # Read defaults and then the local configuration file
    if [ -f $XBPS_DISTDIR/etc/defaults.conf ]; then
        . $XBPS_DISTDIR/etc/defaults.conf
    fi
    if [ -n "$XBPS_ARG_CONFIG" -a -s $XBPS_DISTDIR/etc/conf.$XBPS_ARG_CONFIG ]; then
        # If specified, read custom user configuration...
        readonly XBPS_CONFIG_FILE=$XBPS_DISTDIR/etc/conf.$XBPS_ARG_CONFIG
    elif [ -s $XBPS_DISTDIR/etc/conf ]; then
        # ... otherwise read generic user configuration...
        readonly XBPS_CONFIG_FILE=$XBPS_DISTDIR/etc/conf
    elif [ -s ${XDG_CONFIG_HOME:-$HOME/.config}/xbps-src.conf ]; then
        readonly XBPS_CONFIG_FILE=${XDG_CONFIG_HOME:-$HOME/.config}/xbps-src.conf
    elif [ -s $HOME/.xbps-src.conf ]; then
        # ... fallback to ~/.xbps-src.conf otherwise.
        readonly XBPS_CONFIG_FILE=$HOME/.xbps-src.conf
    fi
fi
# Read settings from config file
[ -s "$XBPS_CONFIG_FILE" ] && . $XBPS_CONFIG_FILE &>/dev/null

# Set options passed on command line, after configuration files have been read
[ -n "$XBPS_ARG_BUILD_ONLY_ONE_PKG" ] && XBPS_BUILD_ONLY_ONE_PKG=yes
[ -n "$XBPS_ARG_SKIP_REMOTEREPOS" ] && XBPS_SKIP_REMOTEREPOS=1
[ -n "$XBPS_ARG_BUILD_FORCEMODE" ] && XBPS_BUILD_FORCEMODE=1
[ -n "$XBPS_ARG_INFORMATIVE_RUN" ] && XBPS_INFORMATIVE_RUN=1
[ -n "$XBPS_ARG_TEMP_MASTERDIR" ] && XBPS_TEMP_MASTERDIR=1
[ -n "$XBPS_ARG_BINPKG_EXISTS" ] && XBPS_BINPKG_EXISTS=1
[ -n "$XBPS_ARG_USE_GIT_REVS" ] && XBPS_USE_GIT_REVS=1
[ -n "$XBPS_ARG_CHECK_PKGS" ] && XBPS_CHECK_PKGS=1
[ -n "$XBPS_ARG_DEBUG_PKGS" ] && XBPS_DEBUG_PKGS=1
[ -n "$XBPS_ARG_SKIP_DEPS" ] && XBPS_SKIP_DEPS=1
[ -n "$XBPS_ARG_KEEP_ALL" ] && XBPS_KEEP_ALL=1
[ -n "$XBPS_ARG_QUIET" ] && XBPS_QUIET=1
[ -n "$XBPS_ARG_PRINT_VARIABLES" ] && XBPS_PRINT_VARIABLES="$XBPS_ARG_PRINT_VARIABLES"
[ -n "$XBPS_ARG_ALT_REPOSITORY" ] && XBPS_ALT_REPOSITORY="$XBPS_ARG_ALT_REPOSITORY"
[ -n "$XBPS_ARG_CROSS_BUILD" ] && XBPS_CROSS_BUILD="$XBPS_ARG_CROSS_BUILD"
[ -n "$XBPS_ARG_MAKEJOBS" ] && XBPS_MAKEJOBS="$XBPS_ARG_MAKEJOBS"

export XBPS_BUILD_ONLY_ONE_PKG XBPS_SKIP_REMOTEREPOS XBPS_BUILD_FORCEMODE \
       XBPS_INFORMATIVE_RUN XBPS_TEMP_MASTERDIR XBPS_BINPKG_EXISTS \
       XBPS_USE_GIT_REVS XBPS_CHECK_PKGS XBPS_DEBUG_PKGS XBPS_SKIP_DEPS \
       XBPS_KEEP_ALL XBPS_QUIET XBPS_ALT_REPOSITORY XBPS_CROSS_BUILD \
       XBPS_MAKEJOBS XBPS_PRINT_VARIABLES

# The masterdir/hostdir variables are forced and readonly in chroot
if [ -z "$IN_CHROOT" ]; then
    [ -n "$XBPS_ARG_MASTERDIR" ] && XBPS_MASTERDIR="$XBPS_ARG_MASTERDIR"
    [ -n "$XBPS_ARG_HOSTDIR" ] && XBPS_HOSTDIR="$XBPS_ARG_HOSTDIR"

    # Sanitize masterdir/hostdir once set for real (resolve links)
    export XBPS_MASTERDIR="$(readlink -f $XBPS_MASTERDIR 2>/dev/null)"
    export XBPS_HOSTDIR="$(readlink -f $XBPS_HOSTDIR 2>/dev/null)"
fi

# If pkg options were set in config(s), merge them with command line
if [ -n "$XBPS_ARG_PKG_OPTIONS" ]; then
    if [ -n "$XBPS_PKG_OPTIONS" ]; then
        export XBPS_PKG_OPTIONS+=",$XBPS_ARG_PKG_OPTIONS"
    else
        export XBPS_PKG_OPTIONS="$XBPS_ARG_PKG_OPTIONS"
    fi
fi

# Forbid root unless XBPS_ALLOW_CHROOT_BREAKOUT is set
# (for travis CI).
if [ -z "$IN_CHROOT" -a "$UID" -eq 0 -a -z "$XBPS_ALLOW_CHROOT_BREAKOUT" ]; then
    echo "ERROR: xbps-src cannot be used as root." 1>&2
    exit 1
fi

# if XBPS_MASTERDIR unset, defaults to $XBPS_DISTDIR/masterdir.
: ${XBPS_MASTERDIR:=$XBPS_DISTDIR/masterdir}
[ ! -d $XBPS_MASTERDIR ] &&  mkdir -p $XBPS_MASTERDIR

# if XBPS_HOSTDIR unset, defaults to $XBPS_DISTDIR/hostdir.
: ${XBPS_HOSTDIR:=$XBPS_DISTDIR/hostdir}
[ ! -d $XBPS_HOSTDIR ] && mkdir -p $XBPS_HOSTDIR

if [ -d "$XBPS_MASTERDIR" -a ! -w "$XBPS_MASTERDIR" ]; then
    echo "ERROR: can't write to masterdir $XBPS_MASTERDIR." 1>&2
    exit 1
fi

# Try using chroot-git then git from the host system
if command -v chroot-git &>/dev/null; then
    export XBPS_GIT_CMD=$(command -v chroot-git)
elif command -v git &>/dev/null; then
    export XBPS_GIT_CMD=$(command -v git)
else
    echo "neither chroot-git or git are available in your system!" 1>&2
    exit 1
fi

if [ -n "$XBPS_HOSTDIR" ]; then
    export XBPS_REPOSITORY=$XBPS_HOSTDIR/binpkgs
    readonly XBPS_SRCDISTDIR=$XBPS_HOSTDIR/sources
else
    export XBPS_REPOSITORY=$XBPS_MASTERDIR/host/binpkgs
    readonly XBPS_SRCDISTDIR=$XBPS_MASTERDIR/host/sources
fi

# Set XBPS_REPOSITORY to our current branch.
if [ -z "$XBPS_ALT_REPOSITORY" ]; then
    pushd "$PWD" &>/dev/null
    cd $XBPS_DISTDIR
    _gitbranch="$($XBPS_GIT_CMD symbolic-ref --short HEAD 2>/dev/null)"
    if [ "${_gitbranch}" -a "${_gitbranch}" != "master" ]; then
        export XBPS_ALT_REPOSITORY="${_gitbranch}"
        export XBPS_REPOSITORY="${XBPS_REPOSITORY}/${_gitbranch}"
     fi
     popd &>/dev/null
else
    export XBPS_REPOSITORY="${XBPS_REPOSITORY}/${XBPS_ALT_REPOSITORY}"
fi

readonly XBPS_SRCPKGDIR=$XBPS_DISTDIR/srcpkgs
readonly XBPS_COMMONDIR=$XBPS_DISTDIR/common
readonly XBPS_SHUTILSDIR=$XBPS_COMMONDIR/xbps-src/shutils
readonly XBPS_TRIGGERSDIR=$XBPS_SRCPKGDIR/xbps-triggers/files
readonly XBPS_CROSSPFDIR=$XBPS_COMMONDIR/cross-profiles
readonly XBPS_BUILDSTYLEDIR=$XBPS_COMMONDIR/build-style
readonly XBPS_LIBEXECDIR=$XBPS_COMMONDIR/xbps-src/libexec
readonly XBPS_BUILDHELPERDIR=$XBPS_COMMONDIR/build-helper

readonly XBPS_TARGET="$1"
if [ "$2" ]; then
    XBPS_TARGET_PKG="${2##*/}"
fi

# Check for CHROOT_READY and set up XBPS_ARCH environment var for xbps.
chroot_check
check_native_arch

# test if to use linux32 for 32-bit masterdirs in 64-bit environments
# x86_64, ppc64 (BE) and aarch64 are capable of this, others are not
linux32_check() {
    local hostarch="$1"
    local tgtarch="$2"
    case "$hostarch" in
        x86_64*) if [[ "$tgtarch" == i686* ]]; then return 0; fi ;;
        ppc64le*) if [[ "$tgtarch" == ppcle* ]]; then return 0; fi ;;
        ppc64*)
            case "$tgtarch" in
                ppc64*) return 1 ;;
                ppc*) return 0 ;;
            esac
            ;;
        aarch64*) if [[ "$tgtarch" == armv* ]]; then return 0; fi ;;
    esac
    return 1
}

# Reconfigure pkgs for 32bit on 64-bit systems and reexec itself.
if [ -z "$XBPS_REINIT" -a -s $XBPS_MASTERDIR/.xbps_chroot_init ]; then
    export XBPS_ARCH=${XBPS_ARCH:-$(<$XBPS_MASTERDIR/.xbps_chroot_init)}
    if linux32_check "$XBPS_MACHINE" "$XBPS_ARCH"; then
        # reconfigure pkgs via linux32
        linux32 xbps-reconfigure -r ${XBPS_MASTERDIR} -a &>/dev/null
        # reexec itself via linux32
        export XBPS_REINIT=1
        exec linux32 $0 ${XBPS_OPTIONS} $@
    fi
fi
if [ "$XBPS_ARCH" ]; then
    export XBPS_MACHINE=$XBPS_ARCH
fi
# At this point if XBPS_TARGET_MACHINE isn't defined we assume
# it's a native build.
if [ -z "$XBPS_TARGET_MACHINE" ]; then
        export XBPS_TARGET_MACHINE=$XBPS_MACHINE
fi

if [ "$IN_CHROOT" ]; then
    readonly XBPS_UHELPER_CMD="xbps-uhelper"
    readonly XBPS_INSTALL_CMD="xbps-install -c /host/repocache-$XBPS_MACHINE"
    readonly XBPS_QUERY_CMD="xbps-query -c /host/repocache-$XBPS_MACHINE"
    readonly XBPS_RECONFIGURE_CMD="xbps-reconfigure"
    readonly XBPS_REMOVE_CMD="xbps-remove"
    readonly XBPS_CHECKVERS_CMD="xbps-checkvers"
    readonly XBPS_DESTDIR=/destdir
    readonly XBPS_BUILDDIR=/builddir
else
    readonly XBPS_UHELPER_CMD="xbps-uhelper -r $XBPS_MASTERDIR"
    readonly XBPS_INSTALL_CMD="xbps-install -c $XBPS_HOSTDIR/repocache-$XBPS_MACHINE -r $XBPS_MASTERDIR -C etc/xbps.d"
    readonly XBPS_QUERY_CMD="xbps-query -c $XBPS_HOSTDIR/repocache-$XBPS_MACHINE -r $XBPS_MASTERDIR -C etc/xbps.d"
    readonly XBPS_RECONFIGURE_CMD="xbps-reconfigure -r $XBPS_MASTERDIR"
    readonly XBPS_REMOVE_CMD="xbps-remove -r $XBPS_MASTERDIR"
    readonly XBPS_CHECKVERS_CMD="xbps-checkvers -r $XBPS_MASTERDIR"
    readonly XBPS_DESTDIR=$XBPS_MASTERDIR/destdir
    readonly XBPS_BUILDDIR=$XBPS_MASTERDIR/builddir
fi
readonly XBPS_RINDEX_CMD="xbps-rindex"
readonly XBPS_FETCH_CMD="xbps-fetch"
readonly XBPS_DIGEST_CMD="xbps-digest"
readonly XBPS_CMPVER_CMD="xbps-uhelper cmpver"

export XBPS_SHUTILSDIR XBPS_CROSSPFDIR XBPS_TRIGGERSDIR \
    XBPS_SRCPKGDIR XBPS_COMMONDIR XBPS_BUILDDIR \
    XBPS_REPOSITORY XBPS_ALT_REPOSITORY XBPS_SRCDISTDIR XBPS_DIGEST_CMD \
    XBPS_UHELPER_CMD XBPS_INSTALL_CMD XBPS_QUERY_CMD XBPS_BUILD_ONLY_ONE_PKG \
    XBPS_RINDEX_CMD XBPS_RECONFIGURE_CMD XBPS_REMOVE_CMD XBPS_CHECKVERS_CMD \
    XBPS_CMPVER_CMD XBPS_FETCH_CMD XBPS_VERSION XBPS_BUILDSTYLEDIR \
    XBPS_CPPFLAGS XBPS_CFLAGS XBPS_CXXFLAGS XBPS_FFLAGS XBPS_LDFLAGS \
    XBPS_MAKEJOBS XBPS_BUILD_FORCEMODE XBPS_USE_GIT_REVS XBPS_DEBUG_PKGS \
    XBPS_CHECK_PKGS XBPS_CCACHE XBPS_DISTCC XBPS_DISTCC_HOSTS XBPS_SKIP_DEPS \
    XBPS_SKIP_REMOTEREPOS XBPS_CROSS_BUILD XBPS_PKG_OPTIONS XBPS_CONFIG_FILE \
    XBPS_KEEP_ALL XBPS_HOSTDIR XBPS_MASTERDIR XBPS_SRC_VERSION \
    XBPS_DESTDIR XBPS_MACHINE XBPS_TEMP_MASTERDIR XBPS_BINPKG_EXISTS \
    XBPS_LIBEXECDIR XBPS_DISTDIR XBPS_DISTFILES_MIRROR XBPS_ALLOW_RESTRICTED \
    XBPS_USE_GIT_COMMIT_DATE XBPS_PKG_COMPTYPE XBPS_REPO_COMPTYPE XBPS_BUILDHELPERDIR

for i in REPOSITORY DESTDIR BUILDDIR SRCDISTDIR; do
    eval val="\$XBPS_$i"
    if [ ! -d "$val" ]; then
        mkdir -p $val
    fi
    unset val
done

# A temporary masterdir requires xbps-uchroot(1) and -O to use overlayfs
# on tmpfs (available with xbps-0.45).
if [ -z "$IN_CHROOT" -a -n "$XBPS_TEMP_MASTERDIR" ]; then
    export XBPS_CHROOT_CMD="uchroot"
    export XBPS_CHROOT_CMD_ARGS+=" -O"
fi
#
# Sanitize PATH.
#
if [ -z "$IN_CHROOT" ]; then
    # In non chroot case always prefer host tools.
    export PATH="$PATH:$XBPS_MASTERDIR/usr/bin"
fi

#
# Set up ccache
#
if [ "$XBPS_CCACHE" ]; then
    export CCACHEPATH="/usr/lib/ccache/bin"
    export CCACHE_DIR="$XBPS_HOSTDIR/ccache"
    # Avoid not using cached files just due to compiler mtime
    # changes when e.g. bootstrapping
    export CCACHE_COMPILERCHECK=content CCACHE_COMPRESS=1
    export PATH="$CCACHEPATH:$PATH"
    mkdir -p $CCACHE_DIR
fi

#
# Set up distcc
#
if [ "$XBPS_DISTCC" ]; then
    if [ "$XBPS_CCACHE" ]; then
        export CCACHE_PREFIX="/usr/bin/distcc"
    else
        DISTCCPATH="/usr/lib/distcc/bin"
        export PATH="$DISTCCPATH:$PATH"
    fi
    export DISTCC_DIR="$XBPS_HOSTDIR/distcc-${XBPS_CROSS_BUILD:-${XBPS_MACHINE}}"
    export DISTCC_HOSTS="$XBPS_DISTCC_HOSTS"
    mkdir -p $DISTCC_DIR
fi

check_build_requirements

if [ -z "$IN_CHROOT" ]; then
    trap 'exit_func' INT TERM
    if [ -n "$XBPS_DISTFILES_MIRROR" ]; then
        setup_distfiles_mirror
    fi
fi
#
# Read funcs from helpers
#
for f in ${XBPS_SHUTILSDIR}/*.sh; do
    [ -r "$f" ] && . $f
done

reconfigure_base_chroot

#
# Main switch.
#
case "$XBPS_TARGET" in
    binary-bootstrap)
        install_base_chroot ${XBPS_TARGET_PKG:=$XBPS_MACHINE}
        ;;
    bootstrap)
        # base-chroot building on host
        # check for required host utils
        check_reqhost_utils bootstrap
        (
            export XBPS_ARCH=$XBPS_MACHINE
            export XBPS_SKIP_REMOTEREPOS=1
            chroot_sync_repodata
            $XBPS_LIBEXECDIR/build.sh \
                base-chroot base-chroot $XBPS_TARGET || exit 1
        ) || exit 1
        [ -d $XBPS_MASTERDIR ] && rm -rf $XBPS_MASTERDIR
        install_base_chroot ${XBPS_TARGET_PKG:=$XBPS_MACHINE}
        ;;
    bootstrap-update)
        if [ -n "$CHROOT_READY" -a -z "$IN_CHROOT" ]; then
            chroot_handler bootstrap-update
        else
            chroot_sync_repodata
            update_base_chroot
        fi
        ;;
    chroot)
        chroot_sync_repodata
        chroot_handler chroot dummy
        ;;
    clean)
        if [ -z "$XBPS_TARGET_PKG" ]; then
            if [ -n "$CHROOT_READY" -a -z "$IN_CHROOT" ]; then
                chroot_handler remove-autodeps
            else
                remove_pkg_autodeps
            fi
            msg_normal "xbps-src: cleaning up masterdir...\n"
            # Needed to remove Go Modules
            [ -d "$XBPS_BUILDDIR" ] && chmod -R +wX $XBPS_BUILDDIR
            rm -rf \
                $XBPS_BUILDDIR \
                $XBPS_DESTDIR
            rm -rf $XBPS_MASTERDIR/tmp
            mkdir -p $XBPS_MASTERDIR/tmp
        else
            read_pkg
            if [ -n "$CHROOT_READY" -a -z "$IN_CHROOT" ]; then
                chroot_handler $XBPS_TARGET $XBPS_TARGET_PKG || exit $?
            else
                remove_pkg_wrksrc
                remove_pkg_statedir
                if declare -f do_clean >/dev/null; then
                    run_func do_clean
                fi
            fi
            remove_pkg $XBPS_CROSS_BUILD
        fi
        ;;
    clean-repocache)
        export XBPS_TARGET_ARCH="${XBPS_CROSS_BUILD:-$XBPS_TARGET_MACHINE}"
        $XBPS_REMOVE_CMD -C /dev/null -c $XBPS_HOSTDIR/repocache-${XBPS_TARGET_ARCH} -O
        ;;
    consistency-check)
        consistency_check
        ;;
    remove-autodeps)
        if [ -n "$CHROOT_READY" -a -z "$IN_CHROOT" ]; then
            chroot_handler remove-autodeps
        else
            remove_pkg_autodeps
        fi
        ;;
    fetch|extract|patch|configure|build|check|install|pkg)
        if [ "$XBPS_TARGET" = "check" ]; then
            export XBPS_CHECK_PKGS=1
        fi
        read_pkg
        if [ -n "$CHROOT_READY" -a -z "$IN_CHROOT" ]; then
            chroot_handler $XBPS_TARGET $XBPS_TARGET_PKG
        else
            chroot_sync_repodata
            # prevent update_base_chroot from removing the builddir/destdir
            update_base_chroot keep-all-force
            $XBPS_LIBEXECDIR/build.sh $XBPS_TARGET_PKG $XBPS_TARGET_PKG \
                $XBPS_TARGET $XBPS_CROSS_BUILD || exit $?
        fi
        ;;
    remove|remove-destdir)
        read_pkg
        remove_pkg $XBPS_CROSS_BUILD
        ;;
    list)
        $XBPS_QUERY_CMD -l
        ;;
    purge-distfiles)
        purge_distfiles
        ;;
    show)
        read_pkg ignore-problems
        show_pkg $XBPS_PRINT_VARIABLES
        ;;
    show-avail)
        read_pkg &>/dev/null
        show_avail
        ;;
    show-files)
        read_pkg ignore-problems
        show_pkg_files
        ;;
    show-deps)
        read_pkg ignore-problems
        show_pkg_deps
        ;;
    show-build-deps)
        read_pkg ignore-problems
        show_pkg_build_deps
        ;;
    show-hostmakedepends)
        read_pkg ignore-problems
        show_pkg_hostmakedepends
        ;;
    show-makedepends)
        read_pkg ignore-problems
        show_pkg_makedepends
        ;;
    show-pkg-var-dump)
        read_pkg ignore-problems
        for sub_name in $subpackages; do
            if [ $sub_name = $XBPS_TARGET_PKG ]; then
                ${sub_name}_package
            fi
        done
        printf "archs: %s\n\n" "$archs"
        printf "bootstrap: %s\n\n" "$bootstrap"
        printf "broken: %s\n\n" "$broken"
        printf "depends: %s\n\n" "$depends"
        printf "hostmakedepends: %s\n\n" "$hostmakedepends"
        printf "makedepends: %s\n\n" "$makedepends"
        printf "nocross: %s\n\n" "$nocross"
        printf "pkgname: %s\n\n" "$pkgname"
        printf "restricted: %s\n\n" "$restricted"
        printf "revision: %s\n\n" "$revision"
        printf "subpackages: %s\n\n" "$subpackages"
        printf "version: %s\n\n" "$version"
        printf "provides: %s\n\n" "$provides"
        printf "lib32disabled: %s\n\n" "$lib32disabled"
        printf "nodebug: %s\n\n" "$nodebug"
        ;;
    show-pkg-var)
        read_pkg ignore-problems
        for sub_name in $subpackages; do
            if [ $sub_name = $XBPS_TARGET_PKG ]; then
                ${sub_name}_package
            fi
        done
        while IFS= read -r pkg_var; do
                print_var=
                case "${pkg_var}" in
                    archs) print_var="$archs ";;
                    bootstrap) print_var="$bootstrap ";;
                    broken) print_var="$broken ";;
                    depends) print_var="$depends ";;
                    hostmakedepends) print_var="$hostmakedepends ";;
                    makedepends) print_var="$makedepends ";;
                    nocross) print_var="$nocross ";;
                    pkgname) print_var="$pkgname ";;
                    restricted) print_var="$restricted ";;
                    revision) print_var="$revision ";;
                    subpackages) print_var="$subpackages ";;
                    version) print_var="$version ";;
                    provides) print_var="$provides ";;
                    lib32disabled) print_var="$lib32disabled ";;
                    nodebug) print_var="$nodebug ";;
                esac # the space at the end of each is essential for unset vars
                if [ -n "$print_var" ]; then
                        printf "%s\n" "$(printf "${print_var% }" | tr -t '\n\r' ' ')"
                fi # The trailing space gets stripped before printing anyway
        done
        ;;
    show-options)
        read_pkg ignore-problems
        show_pkg_build_options
        ;;
    show-shlib-provides)
        read_pkg ignore-problems
        show_pkg_shlib_provides
        ;;
    show-shlib-requires)
        read_pkg ignore-problems
        show_pkg_shlib_requires
        ;;
    show-var)
        for f in ${XBPS_COMMONDIR}/environment/setup/*.sh; do
            source $f
        done
        source ${XBPS_COMMONDIR}/build-profiles/${XBPS_MACHINE}.sh
        eval value="\${$XBPS_TARGET_PKG}"
        echo $value
        ;;
    show-repo-updates)
        bulk_build
        ;;
    show-sys-updates)
        bulk_build -I
        ;;
    sort-dependencies)
        bulk_sortdeps ${@/$XBPS_TARGET/}
        ;;
    update-bulk)
        bulk_update
        ;;
    update-sys)
        bulk_update -I
        ;;
    update-check)
        read_pkg ignore-problems
        update_check
        ;;
    update-hash-cache)
        update_hash_cache
        ;;
    zap)
        masterdir_zap
        ;;
    *)
        msg_red "xbps-src: invalid target $XBPS_TARGET.\n"
        usage && exit 1
        ;;
esac

exit_and_cleanup $?