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#!/bin/bash

source /etc/makepkg.conf
source /etc/abs.conf
source /etc/libretools.conf
source /etc/libretools.d/prtools.conf

if [ -z $XDG_CONFIG_HOME ]; then # Avoid /libretools dir doesn't exist errors

    error "There's no XDG_CONFIG_HOME var set"; exit 1

elif [ -e $XDG_CONFIG_HOME/libretools/libretools.conf ]; then

    source $XDG_CONFIG_HOME/libretools/libretools.conf

fi


function usage {

    echo "cd to a dir containing a PKGBUILD and run:"
    echo "$0 [options]"
    printf "This script will check dependencies, build them if possible "
    printf "and stage the packages on it's repo."
    echo
    echo "OPTIONS:"
    echo " -h           : this message."
    echo " -a absdir    : set absdir as ABSROOT."
    echo " -b build_dir : use a fullpkg build_dir and only build."
    echo " -c           : check deps only, do not build."
    echo " -d build_dir : use this dir to build. Defaults to mktemp."
    echo " -n           : don't update pacman db."
    echo " -m max_level : check deps until this level"
    echo " -r \"command\" : use this instead of \"$FULLBUILDCMD\""
    echo
    exit 1

}

function remove_buildorder { # Removes a package from the buildorder
# $1 package name
# $2 buildorder file

  grep -Evw "${1}" ${2} > ${2}2
  mv -f ${2}2 ${2}

}

function guess_repo { # Get repo name. Asumes ${ABSROOT}/package/repo/PKGBUILD

    basename $(pwd)

}

function get_fullver { # return : full version spec, including epoch (if necessary), pkgver, pkgrel

#  usage : get_fullver( ${epoch:-0}, $pkgver, $pkgrel )

    if [[ $1 -eq 0 ]]; then
        # zero epoch case, don't include it in version
        echo $2-$3
    else
        echo $1:$2-$3
    fi

}

function cleanup {  # Cleans the build_dir.

    [ ! -d "${build_dir}" -o "${build_only}" = 'y' ] && return 0 # Do nothing or already cleaned.


    if [ $level -eq 0 ]; then   # Only do cleanup on level 0.
        msg "Cleaning up ${build_dir}"
        rm -rf "$build_dir/*"
    fi
}

function find_deps {  # Checks ABSROOT and look for target pkg deps. Adds them if not built or outdated.

    source PKGBUILD      ## Check this level.

    local repo=${repo:-$(guess_repo)}
    local pkgbase=${pkgbase:-${pkgname[0]}}
    local epoch=${epoch:-0}
    local fullver=$(get_fullver ${epoch} ${pkgver} ${pkgrel})

    if is_built "${pkgbase}>=${fullver}"; then
        exit 0  # pkg is built and updated
    fi

    echo "${level}:${pkgbase}" >> "${build_dir}/BUILDORDER"  # greater levels are built first

    if [ -d "${build_dir}/${pkgbase}" ]; then  # PKGBUILD is already there

        exit 0

    else  # Copy dir to build_dir

        mkdir ${build_dir}/${pkgbase}
        cp -r $(pwd)/* ${build_dir}/${pkgbase}

        echo "repo=$repo" > "${build_dir}/${pkgbase}/.INFO"  # to identify repo later
    fi

    msg2 "%${level}s${pkgbase}-${fullver}"  # current package plus a space for every level

    declare -i next_level=$level+1  ## Check next deps level.

    deps=$(echo "${depends[@]} ${makedepends[@]}" | \
           sed "s/[=<>]\+[^ ]\+//g" | \
           tr ' ' "\n" | \
           sort -u)  # All deps in separate line, only once, without version.

    for _dep in ${deps[@]}; do

        local found=false

        if [ -d "${ABSROOT}/${_dep}" ]; then  # ABSROOT/package/repo

            for _repo in ${REPOS[@]}; do  # Use PKGBUILD from repo in REPOS array order

                if [ -e "${ABSROOT}/${_dep}/${_repo}/PKGBUILD" ]; then

                    pushd "${ABSROOT}/${_dep}/${_repo}" > /dev/null
                    $0 -c -d ${build_dir} -l ${next_level}  # run this cmd on dep's PKGBUILD dir
                    [ $? -eq 20 ] && return 20  # probable circular deps
                    popd > /dev/null
                    local found=true
                    break 1  # found, go to next dep
                fi

            done

        else  # pkgsplit, needs guess

            for _repo in ${REPOS[@]}; do

                if _dir=($(find "$ABSROOT/" -type f \
                    -wholename "*/${_repo}/PKGBUILD" -print0 2>/dev/null | \
                    "xargs" -0 -e grep -HEw "pkgname=|pkgbase=|provides=" | \
                    grep -w "$_dep" 2>&1)) ;

                then

                    _dir=$(dirname $(echo $_dir | cut -d: -f1))
                    plain "guess for $_dep -> $_dir"

                    pushd "$_dir" > /dev/null
                    $0 -c -d ${build_dir} -l ${next_level}  # run this cmd on dep's PKGBUILD dir
                    [ $? -eq 20 ] && return 20  # probable circular dep
                    popd > /dev/null
                    local found=true
                    break 1 # found, go to next dep
                fi

            done

        fi

        if ( ${found} ); then
            continue 1  # go to next dep
        else
            echo "dep_not_found:$_dep" >> $build_dir/log
        fi

    done

    unset next_level dir
    # unset PKGBUILD variables
    unset pkgbase pkgname pkgver pkgrel epoch pkgdesc arch url license groups depends \
          makedepens checkdepends optdepends provides conflicts replaces backup \
          options install changelog source noextract md5sums build check package
}

function __build () {
    pushd ${build_dir}  > /dev/null

    build_packages=($(sort -gr $buildorder | cut -d: -f2)) # greater levels must be built first

    while [ ${#build_packages[@]} -ge 1 ]; do
        pushd $build_dir/${build_packages[0]} > /dev/null
        source PKGBUILD

        msg2 "${pkgbase:-${pkgname[0]}} $pkgver-$pkgrel"

        msg2 "Checking for non free deps"
        pkgbuild-check-nonfree || {
            if [ $? -eq 15 ]; then # this error means nonfree others means fail.

              echo "nonfree:$(basename $PWD)" >> $build_dir/log

              remove_buildorder "$(basename $PWD)" $buildorder # take out package from $buildorder

              continue # build next package
            fi
        }

        msg2 "Building $(basename $PWD)"

        $FULLBUILDCMD; r=$?  # this buildcmd is on libretools.conf

        case $r in

            0)  ## Succesfull build

                plain "The build was succesful."
                if source .INFO && [ -n $repo ]; then

                    if [ ! -z $HOOKLOCALRELEASE ]; then # Calls a local release script if it's used
                        find -name "*.pkg.tar.?z" -print0 | xargs -0 $HOOKLOCALRELEASE $repo
                    fi

                    librestage $repo || echo "unstaged:$(basename $PWD)" >> $build_dir/log

                    msg "Updating pacman db and packages"
                    sudo pacman -Sy || true

                fi

                echo "built:$(basename $PWD)" >> $build_dir/log
            ;;

            *)  ## Build failed
                error "There were errors while trying to build the package."
                echo "failed:$(basename $PWD)" >> $build_dir/log
            ;;
        esac

        remove_buildorder "${build_packages[0]}" $buildorder || true

        build_packages=($(sort -gr $buildorder | cut -d: -f2)) # which is next package?
        popd > /dev/null
    done

    pkgs=($(grep "nonfree:" $build_dir/log)) && {
        error "Those packages contain nonfree deps:"
        echo ${pkgs[@]} | tr " " "\n" | cut -d: -f2
    }

    pkgs=($(grep "built:" $build_dir/log)) && {
        msg "Those packages were built and staged:"
        echo ${pkgs[@]} | tr " " "\n" | cut -d: -f2
    }

    pkgs=($(grep "failed:" $build_dir/log)) && {
        error "Those packages failed to build:"
        echo ${pkgs[@]} | tr " " "\n" | cut -d: -f2
    }

    pkgs=($(grep "unstaged:" $build_dir/log)) && {
        error "Those packages couldn't be staged because of missing reponame:"
        echo ${pkgs[@]} | tr " " "\n" | cut -d: -f2
    }

    popd > /dev/null
}

function trap_exit { # End inmediately but print a useful message

  error "$@"
  warning "Leftover files left on $build_dir"

  exit 1
}

# Trap signals from makepkg
set -E
trap 'trap_exit "(prfullpkg:${level}) TERM signal caught. Exiting..."' TERM HUP QUIT
trap 'trap_exit "(prfullpkg:${level}) Aborted by user! Exiting..."' INT
trap 'trap_exit "(prfullpkg:${level}) An unknown error has occurred. Exiting..."' ERR

ban_file=$XDG_CONFIG_HOME/libretools/ban
force_build=""
level=0
noupdate='n'
build_only='n'
check_deps_only='n'
max_level=21

while getopts 'ha:b:cd:l:nm:r:' arg; do
    case $arg in
        h) usage ;;
        a) ABSROOT="$OPTARG" ;;
        b) build_only='y'
           build_dir="$OPTARG"
           if [ -z ${build_dir} ]; then
               usage
           fi
           if [ ! -r ${build_dir}/BUILDORDER ] ; then
               error "${build_dir}/BUILDORDER doesn't exist."
               exit 1
           fi;;
        c) check_deps_only='y' ;;
        d) build_dir="$OPTARG" ;;
        l) level=$OPTARG ;; # hidden option to know dep level.
        n) noupdate='y';;
        m) max_level=$OPTARG ;;
        r) FULLBUILDCMD="$OPTARG" ;;
    esac
done

if [ ${build_only} == 'n' ]; then

    [ ! -r PKGBUILD ] && {  # Check if we are actually on a build directory. Do this early.
        error "This isn't a build directory"
        usage
    }

    if [ ! -z "$HOOKPKGBUILDMOD" ]; then
        "$HOOKPKGBUILDMOD"
    fi

fi

if [ $level -eq 0 ]; then

    if [ ! -d ${build_dir} ]; then  # in case of custom -d option
        mkdir -p ${build_dir} 
    else
        cleanup  # files already there can screw find_deps
    fi

    build_dir=${build_dir:-$(mktemp -d /tmp/fullpkg.XXXXXX)}  # use -d option or else mktemp

    touch ${build_dir}/{log,BUILDORDER} ${ban_file}  # make files for log and buildorder
    buildorder=${build_dir}/BUILDORDER

    if [ ${noupdate} = 'n' ]; then

        msg "Updating pacman db and packages"
        sudo pacman -Syu --noconfirm || true

    fi

    if [ ${build_only} == 'y' ]; then

        msg "Build Packages"

        __build

        exit 0

    fi

    msg "Checking dependencies"
fi

[ $level -ge $max_level ] && exit 20  # Probable circular deps

find_deps || {

    if [ $? -eq 20 ]; then  # Probable circular deps

       if [ $level -eq 0 ]; then  # Show error only on level 0
           error "Check for circular deps on $build_dir/BUILDORDER";
       fi

    fi
    exit 20  # Pass message 20
}

[ $check_deps_only = 'y' -o $level -gt 0 ] && exit 0  # only build on level 0

if [ $level -eq 0 -a -d $build_dir ]; then  # Sanity check

    if [  ! -w $ban_file -o ! -r $ban_file ]; then  # Check ban_file permisions

        chmod a+rw $ban_file || error "Ban file is not readable/writable ($ban_file)"

    else

        rsync -e ssh -aq $PARABOLAHOST:mips64el/ban >/dev/null 2>&1 || {

            warning "Failed to get ban list" && [ -r ${ban_file} ] && {  # use local copy if it exist

              search=$(cat ${ban_file} | tr "\n" "|")

              egrep -w "$search" ${buildorder} >> ${build_dir}/banned   # Keep track of banned files

              egrep -vw "$search" ${buildorder} > ${buildorder}2 # Take banned packages out of buildorder

              mv -f ${buildorder}2 ${buildorder}

              unset search
            }
        }
    fi
fi

msg "Building packages:"

__build  # Build the packages

echo
msg2 "Check if your system works fine and librerelease if it does"

exit 0