#!/bin/bash
# TODO
# * Do version checking
# * Detect circular builds
# * Detect pkgnames by provides, replaces, etc. instead of dir tree

[[ ! -r PKGBUILD ]] && {
    echo "This isn't a build directory"
    exit 1
}

tmp_dir=$(mktemp -d /tmp/$(basename $PWD).XXXXXX)
queue_file=$(mktemp /tmp/queue.XXXXXX)
ban_file=$(mktemp)
[[ ! -w $queue_file ]] && exit 1
[[ ! -w $ban_file ]] && exit 1

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

[[ -r ~/.config/libretools/libretools.conf ]] && \
    source ~/.config/libretools/libretools.conf

# Queue Management
# * Always get the queue list from the server
# * Add/Remove from queue
# * Check if a package is listed

# TODO
# * Check for concurrence

guess_repo() {
  basename $(dirname $(pwd))
}

# Get the queue list from the server
get_queue() {
    rsync -e ssh -aq $PARABOLAHOST:mips64el/queue $queue_file >/dev/null 2>&1 || {
        error "Failed to retrieve queue list"
        return 1
    }
}

# Put the queue list on the server
put_queue() {
    rsync -e ssh -aq $queue_file $PARABOLAHOST:mips64el/queue >/dev/null 2>&1 || {
        error "Failed to put queue list"
        return 1
    }
}

# Add packages to the queue
update_queue() {
    get_queue || return $?

    basename $PWD | sed "s/$/:$PACKAGER/" >> $queue_file || return 2

    put_queue || return $?
}

# Remove a package from the queue
remove_queue() {
    get_queue || return $?

    grep -vw "^$(basename $PWD)" $queue_file > $queue_file.2
    cat $queue_file.2 > $queue_file

    put_queue || return $?
}

# Checks if a package is listed
check_queue() {
    get_queue || return $?

    packager=$(grep -w "$(basename $PWD)" ${queue_file} | cut -d ':' -f2)

    [[ ! -z $packager ]] && [[ "$packager" != "$PACKAGER" ]] && {
        warning "$(basename $PWD) is being packaged by $packager. Please wait."
        return 1
    }

    return 0
}

# Checks if the package is banned from building
is_banned() {
    rsync -e ssh -aq $PARABOLAHOST:mips64el/ban $ban_file >/dev/null 2>&1 || {
        echo ":: Failed to get ban list"
        return 0
    }

    grep -w $1 $ban_file >/dev/null 2>&1

    return $?
}


# TODO keep track of spawned fullpkgs
quit() {
    remove_queue

    exit 1
}

repo=${1:-$(guess_repo)}

source PKGBUILD
msg "Building ${repo:-missing repo}/${pkgbase:-${pkgname[@]}}: $pkgdesc"

is_built "${pkgbase:-${pkgname[0]}}>=${pkgver}-${pkgrel}" && exit 0

#sudo pacman -Sy

trap "quit" TERM KILL INT

if is_banned ${pkgbase:-$pkgname}; then 
  error "This package is banned from building. Check the ban list"
  exit 1
fi

check_queue || exit 1

failed=()
missing=()

if ! grep mips64el PKGBUILD >/dev/null; then
  msg "Adding mips64el arch"
  sed -i "s/^\(arch=([^)anym]\+\))/\1 'mips64el')/" "PKGBUILD"
fi

# Gets the dependency list from the package_* functions
#pkgdeps=($(cat PKGBUILD | \
#  tr -d "\n" | \
#  sed -n "s/depends=(\([^)]\+\))/\n::\1\n/pg" | \
#  grep --color=never "^::" | \
#  tr -d [:\'\"] | \
#  tr " " "\n" | \
#  sort -u))

# Clean version checking
deps=$(echo "${depends[@]} ${makedepends[@]} ${pkgdeps[@]}" | \
    sed "s/[=<>]\+[^ ]\+//g" | \
    tr ' ' "\n" | \
    sort -u)

msg "Checking dependencies"
plain "${deps[@]}"

#msg "Syncing database"
#sudo pacman -Sy

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

    for _repo in ${REPOS[@]}; do
        # TODO find split packages
        [[ -e "$ABSROOT/${_repo}/$_dep/PKGBUILD" ]] && {
            source "$ABSROOT/${_repo}/$_dep/PKGBUILD"
            msg2 "Checking for $_dep>=$pkgver-$pkgrel"

# If this version is built, continue with the next dep

            if is_built "$_dep>=$pkgver-$pkgrel"; then
               msg2 "No need to build this one"
               break
            fi

            cp -r "$ABSROOT/$_repo/$_dep" $tmp_dir/ || {
                error "Can't copy $_dep to the work dir."
                exit 1
            }

            # Enter the work dir and run this command in it
            pushd $tmp_dir/$_dep >/dev/null
            $0 $_repo

            [[ $? -ne 0 ]] && {
                failed=(${failed[@]} $_dep)
            }

            popd >/dev/null

            break
#        } || {
# The package can't be found
# This can happen if:
# * The package is built inside a split package
# * The package is provided by some other package (ie by *-libre packages)
#              echo "==> Missing package $_dep"
#              missing=(${missing[@]} $_dep)
        }
    done
done

# TODO probably not elegant enough
# [[ ${#failed[@]} -gt 0 ]] || [[ ${#missing[@]} -gt 0 ]] && {
  [[ ${#failed[@]} -gt 0 ]] && {
      error "This packages failed to build: ${failed[@]}"
      exit 1
  }

# [[ ${#missing[@]} -gt 0 ]] && {
#     echo ":: This packages are missing: ${missing[@]}"
# }

# exit 1
#}

# Let everybody know we're building this
update_queue || {
    warning "Couldn't update the queue, let your partners know about this."
}

cp -r ../$(basename $PWD) $tmp_dir/
pushd $tmp_dir/$(basename $PWD) >/dev/null

msg "Syncing database"
sudo pacman -Syu --noconfirm
makepkg --noconfirm -sLcr ; r=$?
case $r in
    0)
        msg "The build was succesful."
        mipsrelease *.pkg.tar.*

        librestage $repo

        sudo pacman -Sy
        ;;
    1)
        error "There were errors while trying to build the package."
        ;;
    2)
        error "The build failed."
        ;;
esac

# Remove from queue
remove_queue

exit $r