Create a dedicated script for deploying software actions

scripts/Common/OS/install.fish

@@ -29,6 +29,14 @@ if [ (id -u) -eq 0 ]
     userdel -r "$name"
 else
     source "$dir/../Software/bash/main.fish"
+
+    if not type -q getDeploymentScript
+        function getDeploymentScript
+            echo "No deployment script specified! No software will be installed." 1>&2
+            false
+        end
+    end
+
     runHook initialize || true
     runHook installDrivers || true
     runHook installOS || true
@@ -37,7 +45,14 @@ else
         source "$dir/users.fish"
     end
 
-    runHook installSoftware || true
+    runHook installSoftware || begin
+        set -l script (getDeploymentScript)
+
+        if [ -n "$script" ]
+            source $script
+        end
+    end
+
     runHook initializeConfig || true
 
     runHook postInstall || true