05core: add || exit 1 to systemctl add-{requires,wants} calls

Because dracut directly sources `module-setup.sh` scripts and isn't
compatible with `set -e`, we can't just turn it on in our modules.
Instead, let's just manually add `|| exit 1` in all the calls to
`systemctl add-{requires,wants}` so that we catch regressions like
#799 at build time
in the future.

overlay.d/05core/usr/lib/dracut/modules.d/35coreos-ignition/module-setup.sh

@@ -11,7 +11,9 @@ install_ignition_unit() {
     local target="${1:-ignition-complete.target}"; shift
     local instantiated="${1:-$unit}"; shift
     inst_simple "$moddir/$unit" "$systemdsystemunitdir/$unit"
-    systemctl -q --root="$initdir" add-requires "$target" "$instantiated"
+    # note we `|| exit 1` here so we error out if e.g. the units are missing
+    # see https://github.com/coreos/fedora-coreos-config/issues/799
+    systemctl -q --root="$initdir" add-requires "$target" "$instantiated" || exit 1
 }
 
 install() {

overlay.d/05core/usr/lib/dracut/modules.d/35coreos-live/module-setup.sh

@@ -7,7 +7,9 @@ install_and_enable_unit() {
     unit="$1"; shift
     target="$1"; shift
     inst_simple "$moddir/$unit" "$systemdsystemunitdir/$unit"
-    systemctl -q --root="$initdir" add-requires "$target" "$unit"
+    # note we `|| exit 1` here so we error out if e.g. the units are missing
+    # see https://github.com/coreos/fedora-coreos-config/issues/799
+    systemctl -q --root="$initdir" add-requires "$target" "$unit" || exit 1
 }
 
 install() {

overlay.d/05core/usr/lib/dracut/modules.d/35coreos-network/module-setup.sh

@@ -2,7 +2,9 @@ install_and_enable_unit() {
     unit="$1"; shift
     target="$1"; shift
     inst_simple "$moddir/$unit" "$systemdsystemunitdir/$unit"
-    systemctl -q --root="$initdir" add-requires "$target" "$unit"
+    # note we `|| exit 1` here so we error out if e.g. the units are missing
+    # see https://github.com/coreos/fedora-coreos-config/issues/799
+    systemctl -q --root="$initdir" add-requires "$target" "$unit" || exit 1
 }
 
 install() {

overlay.d/05core/usr/lib/dracut/modules.d/40ignition-ostree/module-setup.sh

@@ -10,7 +10,9 @@ install_ignition_unit() {
     local unit=$1; shift
     local target=${1:-complete}
     inst_simple "$moddir/$unit" "$systemdsystemunitdir/$unit"
-    systemctl -q --root="$initdir" add-requires "ignition-${target}.target" "$unit"
+    # note we `|| exit 1` here so we error out if e.g. the units are missing
+    # see https://github.com/coreos/fedora-coreos-config/issues/799
+    systemctl -q --root="$initdir" add-requires "ignition-${target}.target" "$unit" || exit 1
 }
 
 install() {

overlay.d/05core/usr/lib/dracut/modules.d/50coreos-kernel/module-setup.sh

@@ -2,7 +2,9 @@ install_unit() {
     unit="$1"; shift
     target="$1"; shift
     inst_simple "$moddir/$unit" "$systemdsystemunitdir/$unit"
-    systemctl -q --root="$initdir" add-requires "$target" "$unit"
+    # note we `|| exit 1` here so we error out if e.g. the units are missing
+    # see https://github.com/coreos/fedora-coreos-config/issues/799
+    systemctl -q --root="$initdir" add-requires "$target" "$unit" || exit 1
 }
 
 install() {

overlay.d/05core/usr/lib/dracut/modules.d/99emergency-timeout/module-setup.sh

@@ -7,7 +7,9 @@ install_unit_wants() {
     local target="$1"; shift
     local instantiated="${1:-$unit}"; shift
     inst_simple "$moddir/$unit" "$systemdsystemunitdir/$unit"
-    systemctl -q --root="$initdir" add-wants "$target" "$instantiated"
+    # note we `|| exit 1` here so we error out if e.g. the units are missing
+    # see https://github.com/coreos/fedora-coreos-config/issues/799
+    systemctl -q --root="$initdir" add-wants "$target" "$instantiated" || exit 1
 }
 
 install() {