WIP: run0 support

Signed-off-by: Christian Heusel <christian@heusel.eu>

doc/man/offload-build.1.asciidoc

@@ -14,7 +14,7 @@ Description
 
 Build a PKGBUILD on a remote server using makechrootpkg. Requires a remote user
 that can run archbuild in a non-interactive manner, e.g. must be able to
-elevate permissions using passwordless sudo.
+elevate permissions using passwordless run0.
 
 Options
 -------

doc/man/pkgctl-auth.1.asciidoc

@@ -3,7 +3,7 @@ pkgctl-auth(1)
 
 Name
 ----
-pkgctl-auth - Authenticate with serivces like GitLab.
+pkgctl-auth - Authenticate with services like GitLab.
 
 Synopsis
 --------

src/lib/archroot.sh

@@ -15,7 +15,11 @@ check_root() {
 	local orig_argv=("$@")
 
 	(( EUID == 0 )) && return
-	if type -P sudo >/dev/null; then
+	if type -P run0 >/dev/null; then
+		keepenv=",$keepenv"
+		command="run0 ${keepenv//,/ --setenv=}"
+		exec ${command} -- "${orig_argv[@]}"
+	elif type -P sudo >/dev/null; then
 		exec sudo --preserve-env="${keepenv}" -- "${orig_argv[@]}"
 	else
 		exec su root -c "$(printf ' %q' "${orig_argv[@]}")"

src/makechrootpkg.in

@@ -19,7 +19,7 @@ shopt -s nullglob
 
 default_makepkg_args=(--syncdeps --noconfirm --log --holdver --skipinteg)
 makepkg_args=("${default_makepkg_args[@]}")
-verifysource_args=(--syncdeps --noconfirm --log)
+verifysource_args=()
 chrootdir=
 passeddir=
 makepkg_user=
@@ -175,7 +175,7 @@ prepare_chroot() {
 	printf >>"$copydir/etc/passwd" 'builduser:x:%d:%d:builduser:/build:/bin/bash\n' "$builduser_uid" "$builduser_gid"
 	printf >>"$copydir/etc/shadow" 'builduser:!!:%d::::::\n' "$(( $(date -u +%s) / 86400 ))"
 
-	$install -d "$copydir"/{build,startdir,{pkg,srcpkg,src,log}dest,verify/{gnupg,ssh}}
+	$install -d "$copydir"/{build,startdir,{pkg,srcpkg,src,log}dest}
 
 	sed -e '/^MAKEFLAGS=/d' -e '/^PACKAGER=/d' -i "$copydir/etc/makepkg.conf"
 	for x in BUILDDIR=/build PKGDEST=/pkgdest SRCPKGDEST=/srcpkgdest SRCDEST=/srcdest LOGDEST=/logdest \
@@ -185,10 +185,18 @@ prepare_chroot() {
 		echo "$x" >>"$copydir/etc/makepkg.conf"
 	done
 
-	cat > "$copydir/etc/sudoers.d/builduser-pacman" <<EOF
-builduser ALL = NOPASSWD: /usr/bin/pacman
+	# TODO(gromit): check if this rule is sane
+	# TODO(gromit): this will require a full container
+	cat > "$copydir/etc/polkit-1/rules.d/10-systemd-nopasswd.rules" <<EOF
+polkit.addRule(function(action, subject) {
+    if (action.id == "org.freedesktop.systemd1.manage-units") {
+        if (subject.isInGroup("wheel")) {
+            return polkit.Result.YES;
+        }
+    }
+});
 EOF
-	chmod 440 "$copydir/etc/sudoers.d/builduser-pacman"
+	chmod 440 "$copydir/etc/polkit-1/rules.d/10-systemd-nopasswd.rules"
 
 	cat > "$copydir/etc/gitconfig" <<EOF
 [safe]
@@ -222,17 +230,14 @@ _chrootbuild() {
 	# shellcheck source=/dev/null
 	. /etc/profile
 
-	# Beware, there are some stupid arbitrary rules on how you can
-	# use "$" in arguments to commands with "sudo -i".  ${foo} or
-	# ${1} is OK, but $foo or $1 isn't.
-	# https://bugzilla.sudo.ws/show_bug.cgi?id=765
-	sudo --preserve-env=SOURCE_DATE_EPOCH \
-		--preserve-env=BUILDTOOL \
-		--preserve-env=BUILDTOOLVER \
-		-iu builduser bash -c 'cd /startdir; makepkg "$@"' -bash "$@"
+	run0 --setenv=SOURCE_DATE_EPOCH \
+		 --setenv=BUILDTOOL \
+		 --setenv=BUILDTOOLVER \
+		 --via-shell --chdir='~' \
+		 --user=builduser -- bash -c 'cd /startdir; makepkg "$@"' -bash "$@"
 	ret=$?
 	case $ret in
-		0|14)
+		0)
 			return 0;;
 		*)
 			return $ret;;
@@ -243,14 +248,23 @@ _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/${pkgfile##*/}-namcap.log"
+		run0 --user=builduser -- namcap "$pkgfile" 2>&1 | tee "/logdest/${pkgfile##*/}-namcap.log"
 	done
 }
 
-_download_sources() {
+download_sources() {
+	setup_workdir
+	chown "$makepkg_user:" "$WORKDIR"
+
 	# Ensure sources are downloaded
-	sudo -u builduser env SRCDEST="/srcdest" GNUPGHOME="/verify/gnupg" SSH_AUTH_SOCK="/verify/ssh" \
-		bash -c "cd /startdir; makepkg --config=/etc/makepkg.conf --verifysource -o ${verifysource_args[*]}"
+	run0 --user="$makepkg_user" \
+		--setenv=GNUPGHOME \
+		--setenv=SSH_AUTH_SOCK \
+		--setenv=SRCDEST="$SRCDEST" \
+		--setenv=BUILDDIR="$WORKDIR" \
+		--chdir=. -- \
+		makepkg --config="$copydir/etc/makepkg.conf" --verifysource -o "${verifysource_args[@]}" ||
+		die "Could not download sources."
 }
 
 move_logfiles() {
@@ -347,7 +361,6 @@ umask 0022
 ORIG_HOME=$HOME
 IFS=: read -r _ _ _ _ _ HOME _ < <(getent passwd "${SUDO_USER:-$USER}")
 load_makepkg_config
-DEVTOOLS_GNUPGHOME="${GNUPGHOME:-$HOME/.gnupg}"
 HOME=$ORIG_HOME
 
 # Use PKGBUILD directory if these don't exist
@@ -379,6 +392,8 @@ if [[ "$(id -u "$makepkg_user")" == 0 ]]; then
 	exit 1
 fi
 
+download_sources
+
 prepare_chroot
 
 nspawn_build_args=(
@@ -390,16 +405,11 @@ nspawn_build_args=(
 	"${bindmounts_tmpfs[@]}"
 )
 
-arch-nspawn "$copydir" \
-	"${nspawn_build_args[@]}" --bind-ro="${DEVTOOLS_GNUPGHOME//:/\\:}:/verify/gnupg" --bind-ro="${SSH_AUTH_SOCK//:/\\:}:/verify/ssh" \
-	bash -c "$(declare -f _download_sources); verifysource_args=(${verifysource_args[*]}); _download_sources" ||
-	die "Could not download sources."
-
 if arch-nspawn "$copydir" \
 	"${nspawn_build_args[@]}" \
 	/chrootbuild "${makepkg_args[@]}"
 then
-	mapfile -t pkgnames < <(sudo -u "$makepkg_user" bash -c 'source PKGBUILD; printf "%s\n" "${pkgname[@]}"')
+	mapfile -t pkgnames < <(run0 --user="$makepkg_user" -- bash -c 'source PKGBUILD; printf "%s\n" "${pkgname[@]}"')
 	move_products
 else
 	(( ret += 1 ))
@@ -452,7 +462,7 @@ else
 		done
 
 		msg2 "Checking packages"
-		sudo -u "$makepkg_user" checkpkg --rmdir --warn --makepkg-config "$copydir/etc/makepkg.conf" "${remotepkgs[@]/#file:\/\//}"
+		run0 --user="$makepkg_user" -- checkpkg --rmdir --warn --makepkg-config "$copydir/etc/makepkg.conf" "${remotepkgs[@]/#file:\/\//}"
 	fi
 	true
 fi

src/makerepropkg.in

@@ -192,7 +192,7 @@ for p in "$@"; do
         pkgfile=${pkgfile_remote#file://}
         if [[ ! -f ${pkgfile} ]]; then
             msg "Downloading package '%s' into pacman's cache" "${pkgfile}"
-            sudo pacman -Swdd --noconfirm --logfile /dev/null "${p}" || exit 1
+            run0 -- pacman -Swdd --noconfirm --logfile /dev/null "${p}" || exit 1
             pkgfile_remote=$(pacman -Sddp "${p}" 2>/dev/null)
             pkgfile="${pkgfile_remote#file://}"
         fi