B #223: Mask ssh service during dpkg-reconfigure openssh-server

src/etc/one-context.d/loc-24-ssh_host_key##deb

@@ -16,7 +16,32 @@
 # limitations under the License.                                             #
 #--------------------------------------------------------------------------- #
 
+SERVICE_FILE='/etc/systemd/system/ssh.service'
+SERVICE_LINK='/dev/null-one-context'
+
+setup() {
+    if [ -d "$(dirname "${SERVICE_FILE}")" ] &&
+       ! stat "${SERVICE_FILE}" &>/dev/null;
+    then
+        ln -s "${SERVICE_LINK}" "${SERVICE_FILE}"
+    fi
+}
+
+clean() {
+    if [ -L "${SERVICE_FILE}" ] &&
+       [ "$(readlink "${SERVICE_FILE}")" = "${SERVICE_LINK}" ];
+    then
+        unlink "${SERVICE_FILE}"
+        systemctl daemon-reload &>/dev/null || :
+    fi
+}
+
+###
+
+trap 'clean' EXIT
+
 if [ ! -f /etc/ssh/ssh_host_rsa_key ]; then
+    setup
+
     DEBIAN_FRONTEND=noninteractive dpkg-reconfigure openssh-server
 fi
-