Fix `make BIND_DIR=. DOCKER_SYSTEMD=1 shell`

Signed-off-by: Cory Snider <csnider@mirantis.com>

Dockerfile

@@ -386,9 +386,6 @@ RUN --mount=type=cache,sharing=locked,id=moby-dev-aptlib,target=/var/lib/apt \
             dbus-user-session \
             systemd \
             systemd-sysv
-RUN mkdir -p hack \
-  && curl -o hack/dind-systemd https://raw.githubusercontent.com/AkihiroSuda/containerized-systemd/b70bac0daeea120456764248164c21684ade7d0d/docker-entrypoint.sh \
-  && chmod +x hack/dind-systemd
 ENTRYPOINT ["hack/dind-systemd"]
 
 FROM dev-systemd-${SYSTEMD} AS dev

hack/dind-systemd

@@ -0,0 +1,62 @@
+#!/bin/bash
+set -e
+container=docker
+export container
+
+if [ $# -eq 0 ]; then
+	echo >&2 'ERROR: No command specified. You probably want to run `journalctl -f`, or maybe `bash`?'
+	exit 1
+fi
+
+if [ ! -t 0 ]; then
+	echo >&2 'ERROR: TTY needs to be enabled (`docker run -t ...`).'
+	exit 1
+fi
+
+env > /etc/docker-entrypoint-env
+
+cat > /etc/systemd/system/docker-entrypoint.target << EOF
+[Unit]
+Description=the target for docker-entrypoint.service
+Requires=docker-entrypoint.service systemd-logind.service systemd-user-sessions.service
+EOF
+
+quoted_args="$(printf " %q" "${@}")"
+echo "${quoted_args}" > /etc/docker-entrypoint-cmd
+
+cat > /etc/systemd/system/docker-entrypoint.service << EOF
+[Unit]
+Description=docker-entrypoint.service
+
+[Service]
+ExecStart=/bin/bash -exc "source /etc/docker-entrypoint-cmd"
+# EXIT_STATUS is either an exit code integer or a signal name string, see systemd.exec(5)
+ExecStopPost=/bin/bash -ec "if echo \${EXIT_STATUS} | grep [A-Z] > /dev/null; then echo >&2 \"got signal \${EXIT_STATUS}\"; systemctl exit \$(( 128 + \$( kill -l \${EXIT_STATUS} ) )); else systemctl exit \${EXIT_STATUS}; fi"
+StandardInput=tty-force
+StandardOutput=inherit
+StandardError=inherit
+WorkingDirectory=$(pwd)
+EnvironmentFile=/etc/docker-entrypoint-env
+
+[Install]
+WantedBy=multi-user.target
+EOF
+
+systemctl mask systemd-firstboot.service systemd-udevd.service
+systemctl unmask systemd-logind
+systemctl enable docker-entrypoint.service
+
+systemd=
+if [ -x /lib/systemd/systemd ]; then
+	systemd=/lib/systemd/systemd
+elif [ -x /usr/lib/systemd/systemd ]; then
+	systemd=/usr/lib/systemd/systemd
+elif [ -x /sbin/init ]; then
+	systemd=/sbin/init
+else
+	echo >&2 'ERROR: systemd is not installed'
+	exit 1
+fi
+systemd_args="--show-status=false --unit=docker-entrypoint.target"
+echo "$0: starting $systemd $systemd_args"
+exec $systemd $systemd_args