#!/bin/bash # License: GNU GPLv2 # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; version 2 of the License. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. m4_include(lib/common.sh) m4_include(lib/archroot.sh) shopt -s nullglob init_variables() { default_makepkg_args=(-s --noconfirm -L --holdver) makepkg_args=("${default_makepkg_args[@]}") repack=false update_first=false clean_first=false run_namcap=false temp_chroot=false chrootdir= passeddir= makepkg_user= declare -ga install_pkgs declare -gi ret=0 bindmounts_ro=() bindmounts_rw=() copy=$USER [[ -n ${SUDO_USER:-} ]] && copy=$SUDO_USER [[ -z "$copy" || $copy = root ]] && copy=copy src_owner=${SUDO_USER:-$USER} } usage() { echo "Usage: ${0##*/} [options] -r <chrootdir> [--] [makepkg args]" echo ' Run this script in a PKGBUILD dir to build a package inside a' echo ' clean chroot. Arguments passed to this script after the' echo ' end-of-options marker (--) will be passed to makepkg.' echo '' echo ' The chroot dir consists of the following directories:' echo ' <chrootdir>/{root, copy} but only "root" is required' echo ' by default. The working copy will be created as needed' echo '' echo 'The chroot "root" directory must be created via the following' echo 'command:' echo ' mkarchroot <chrootdir>/root base-devel' echo '' echo 'This script reads {SRC,SRCPKG,PKG,LOG}DEST, MAKEFLAGS and PACKAGER' echo 'from makepkg.conf(5), if those variables are not part of the' echo 'environment.' echo '' echo "Default makepkg args: ${default_makepkg_args[*]}" echo '' echo 'Flags:' echo '-h This help' echo '-c Clean the chroot before building' echo '-d <dir> Bind directory into build chroot as read-write' echo '-D <dir> Bind directory into build chroot as read-only' echo '-u Update the working copy of the chroot before building' echo ' This is useful for rebuilds without dirtying the pristine' echo ' chroot' echo '-r <dir> The chroot dir to use' echo '-I <pkg> Install a package into the working copy of the chroot' echo '-l <copy> The directory to use as the working copy of the chroot' echo ' Useful for maintaining multiple copies' echo " Default: $copy" echo '-n Run namcap on the package' echo '-T Build in a temporary directory' echo '-U Run makepkg as a specified user' exit 1 } # {{{ functions # Usage: load_vars $makepkg_conf # Globals: # - SRCDEST # - SRCPKGDEST # - PKGDEST # - LOGDEST # - MAKEFLAGS # - PACKAGER load_vars() { local makepkg_conf="$1" var [[ -f $makepkg_conf ]] || return 1 for var in {SRC,SRCPKG,PKG,LOG}DEST MAKEFLAGS PACKAGER; do [[ -z ${!var:-} ]] && eval $(grep "^${var}=" "$makepkg_conf") done return 0 } # Usage: sync_chroot $CHROOTDIR/$CHROOT <$CHROOTCOPY|$copydir> sync_chroot() { local chrootdir=$1 local copy=$2 local copydir='' if [[ ${copy:0:1} = / ]]; then copydir=$copy else copydir="$chrootdir/$copy" fi if [[ "$chrootdir/root" -ef "$copydir" ]]; then error 'Cannot sync copy with itself: %s' "$copydir" return 1 fi # Get a read lock on the root chroot to make # sure we don't clone a half-updated chroot slock 8 "$chrootdir/root.lock" \ "Locking clean chroot [%s]" "$chrootdir/root" stat_busy "Synchronizing chroot copy [%s] -> [%s]" "$chrootdir/root" "$copydir" if is_btrfs "$chrootdir" && ! mountpoint -q "$copydir"; then subvolume_delete_recursive "$copydir" || die "Unable to delete subvolume %s" "$copydir" btrfs subvolume snapshot "$chrootdir/root" "$copydir" >/dev/null || die "Unable to create subvolume %s" "$copydir" else mkdir -p "$copydir" rsync -a --delete -q -W -x "$chrootdir/root/" "$copydir" fi stat_done # Drop the read lock again lock_close 8 # Update mtime touch "$copydir" } # Usage: delete_chroot $copydir [$copy] delete_chroot() { local copydir=$1 local copy=${1:-$2} stat_busy "Removing chroot copy [%s]" "$copy" if is_btrfs "$chrootdir" && ! mountpoint -q "$copydir"; then subvolume_delete_recursive "$copydir" || die "Unable to delete subvolume %s" "$copydir" else # avoid change of filesystem in case of an umount failure rm --recursive --force --one-file-system "$copydir" || die "Unable to delete %s" "$copydir" fi # remove lock file rm -f "$copydir.lock" stat_done } # Usage: install_packages $copydir $pkgs... install_packages() { local copydir=$1 local install_pkgs=("${@:2}") local -a pkgnames local ret pkgnames=("${install_pkgs[@]##*/}") cp -- "${install_pkgs[@]}" "$copydir/root/" arch-nspawn "$copydir" "${bindmounts_ro[@]}" "${bindmounts_rw[@]}" \ pacman -U --noconfirm -- "${pkgnames[@]/#//root/}" ret=$? rm -- "${pkgnames[@]/#/$copydir/root/}" return $ret } # Usage: prepare_chroot $copydir $HOME $repack $run_namcap # Globals: # - MAKEFLAGS # - PACKAGER prepare_chroot() { local copydir=$1 local USER_HOME=$2 local repack=$3 local run_namcap=$4 $repack || rm -rf "$copydir/build" local builduser_uid="${SUDO_UID:-$UID}" local builduser_gid="$(id -g "$builduser_uid")" local install="install -o $builduser_uid -g $builduser_gid" local x # We can't use useradd without chrooting, otherwise it invokes PAM modules # which we might not be able to load (i.e. when building i686 packages on # an x86_64 host). sed -e '/^builduser:/d' -i "$copydir"/etc/{passwd,group} printf >>"$copydir/etc/group" 'builduser:x:%d:\n' $builduser_gid printf >>"$copydir/etc/passwd" 'builduser:x:%d:%d:builduser:/build:/bin/bash\n' $builduser_uid $builduser_gid $install -d "$copydir"/{build,build/.gnupg,startdir,{pkg,srcpkg,src,log}dest} for x in .gnupg/pubring.{kbx,gpg}; do [[ -r $USER_HOME/$x ]] || continue $install -m 644 "$USER_HOME/$x" "$copydir/build/$x" done sed -e '/^MAKEFLAGS=/d' -e '/^PACKAGER=/d' -i "$copydir/etc/makepkg.conf" for x in BUILDDIR=/build PKGDEST=/pkgdest SRCPKGDEST=/srcpkgdest SRCDEST=/srcdest LOGDEST=/logdest \ "MAKEFLAGS='${MAKEFLAGS:-}'" "PACKAGER='${PACKAGER:-}'" do grep -q "^$x" "$copydir/etc/makepkg.conf" && continue echo "$x" >>"$copydir/etc/makepkg.conf" done cat > "$copydir/etc/sudoers.d/builduser-pacman" <<EOF builduser ALL = NOPASSWD: /usr/bin/pacman EOF chmod 440 "$copydir/etc/sudoers.d/builduser-pacman" # This is a little gross, but this way the script is recreated every time in the # working copy { printf '#!/bin/bash\n' declare -f _chrootbuild printf '_chrootbuild "$@" || exit\n' if $run_namcap; then declare -f _chrootnamcap printf '_chrootnamcap || exit\n' fi } >"$copydir/chrootbuild" chmod +x "$copydir/chrootbuild" } # These functions aren't run in makechrootpkg, # so no global variables _chrootbuild() { . /etc/profile sudo -iu builduser bash -c 'cd /startdir; makepkg "$@"' -bash "$@" } _chrootnamcap() { pacman -S --needed --noconfirm namcap for pkgfile in /startdir/PKGBUILD /pkgdest/*; do echo "Checking ${pkgfile##*/}" sudo -u builduser namcap "$pkgfile" 2>&1 | tee "/logdest/${pkgfile##*/}-namcap.log" done } # Usage: download_sources $copydir $src_owner # Globals: # - SRCDEST # - USER download_sources() { local copydir=$1 local src_owner=$2 local builddir="$(mktemp -d)" chmod 1777 "$builddir" # Ensure sources are downloaded makepkg_user=${makepkg_user:-$SUDO_USER} if [[ -n $makepkg_user ]]; then sudo -u "$makepkg_user" env SRCDEST="$SRCDEST" BUILDDIR="$builddir" \ makepkg --config="$copydir/etc/makepkg.conf" --verifysource -o else error "Running makepkg as root is not allowed." exit 1 fi (( $? != 0 )) && die "Could not download sources." # Clean up garbage from verifysource rm -rf "$builddir" } # Usage: move_products $copydir $owner # Globals: # - PKGDEST # - LOGDEST move_products() { local copydir=$1 local src_owner=$2 local pkgfile for pkgfile in "$copydir"/pkgdest/*; do chown "$src_owner" "$pkgfile" mv "$pkgfile" "$PKGDEST" # Fix broken symlink because of temporary chroot PKGDEST /pkgdest if [[ "$PWD" != "$PKGDEST" && -L "$PWD/${pkgfile##*/}" ]]; then ln -sf "$PKGDEST/${pkgfile##*/}" fi done local l for l in "$copydir"/logdest/*; do [[ $l == */logpipe.* ]] && continue chown "$src_owner" "$l" mv "$l" "$LOGDEST" done for s in "$copydir"/srcpkgdest/*; do chown "$src_owner" "$s" mv "$s" "$SRCPKGDEST" done } # }}} main() { init_variables while getopts 'hcur:I:l:nTD:d:U:' arg; do case "$arg" in c) clean_first=true ;; D) bindmounts_ro+=(--bind-ro="$OPTARG") ;; d) bindmounts_rw+=(--bind="$OPTARG") ;; u) update_first=true ;; r) passeddir="$OPTARG" ;; I) install_pkgs+=("$OPTARG") ;; l) copy="$OPTARG" ;; n) run_namcap=true; makepkg_args+=(-i) ;; T) temp_chroot=true; copy+="-$$" ;; U) makepkg_user="$OPTARG" ;; h|*) usage ;; esac done [[ ! -f PKGBUILD && -z "${install_pkgs[*]}" ]] && die 'This must be run in a directory containing a PKGBUILD.' [[ -n $makepkg_user && -z $(id -u "$makepkg_user") ]] && die 'Invalid makepkg user.' check_root # Canonicalize chrootdir, getting rid of trailing / chrootdir=$(readlink -e "$passeddir") [[ ! -d $chrootdir ]] && die "No chroot dir defined, or invalid path '%s'" "$passeddir" [[ ! -d $chrootdir/root ]] && die "Missing chroot dir root directory. Try using: mkarchroot %s/root base-devel" "$chrootdir" if [[ ${copy:0:1} = / ]]; then copydir=$copy else copydir="$chrootdir/$copy" fi # Pass all arguments after -- right to makepkg makepkg_args+=("${@:$OPTIND}") # See if -R was passed to makepkg for arg in "${@:OPTIND}"; do case ${arg%%=*} in -*R*|--repackage) repack=true break 2 ;; esac done if [[ -n $SUDO_USER ]]; then eval "USER_HOME=~$SUDO_USER" else USER_HOME=$HOME fi umask 0022 load_vars "${XDG_CONFIG_HOME:-$USER_HOME/.config}/pacman/makepkg.conf" || load_vars "$USER_HOME/.makepkg.conf" load_vars /etc/makepkg.conf # Use PKGBUILD directory if these don't exist [[ -d $PKGDEST ]] || PKGDEST=$PWD [[ -d $SRCDEST ]] || SRCDEST=$PWD [[ -d $SRCPKGDEST ]] || SRCPKGDEST=$PWD [[ -d $LOGDEST ]] || LOGDEST=$PWD # Lock the chroot we want to use. We'll keep this lock until we exit. lock 9 "$copydir.lock" "Locking chroot copy [%s]" "$copy" if [[ ! -d $copydir ]] || $clean_first; then sync_chroot "$chrootdir" "$copy" fi $update_first && arch-nspawn "$copydir" \ "${bindmounts_ro[@]}" "${bindmounts_rw[@]}" \ pacman -Syu --noconfirm if [[ -n ${install_pkgs[*]:-} ]]; then install_packages "$copydir" "${install_pkgs[@]}" ret=$? # If there is no PKGBUILD we have done [[ -f PKGBUILD ]] || return $ret fi download_sources "$copydir" "$src_owner" prepare_chroot "$copydir" "$USER_HOME" "$repack" if arch-nspawn "$copydir" \ --bind="$PWD:/startdir" \ --bind="$SRCDEST:/srcdest" \ "${bindmounts_ro[@]}" "${bindmounts_rw[@]}" \ /chrootbuild "${makepkg_args[@]}" then move_products "$copydir" "$src_owner" else (( ret += 1 )) fi $temp_chroot && delete_chroot "$copydir" "$copy" if (( ret != 0 )); then if $temp_chroot; then die "Build failed" else die "Build failed, check %s/build" "$copydir" fi else true fi } main "$@"