Simplify the creation of hooks

scripts/Arch/OS/setup.fish

@@ -2,6 +2,7 @@
 begin
     set -l dir (status dirname)
     . "$dir/../../Common/Scripts/config.fish"
+    . "$dir/../../Common/Scripts/hooks.fish"
 
     set -q CONFIG_MODULE || set -l CONFIG_MODULE "$dir/config.nix"
     set -q ARCH_TIMEZONE || set -l ARCH_TIMEZONE "Europe/Zurich"
@@ -37,12 +38,7 @@ begin
             man-pages \
             texinfo
 
-        and if type -q installDrivers
-            echo "Installing drivers…"
-            installDrivers
-        else
-            true
-        end
+        and runHook installDrivers "Installing drivers…" || true
 
         and "$dir/../../copy-repo.fish" "$ARCH_MOUNT_ROOT$tempRoot"
         and genfstab -U "$ARCH_MOUNT_ROOT" >> "$ARCH_MOUNT_ROOT/etc/fstab"

scripts/Common/Scripts/hooks.fish

@@ -0,0 +1,12 @@
+function runHook -S -a name message
+    if type -q "$name"
+        if test -n "$message"
+            echo "$message"
+        end
+
+        "$name"
+        or exit
+    else
+        return 1
+    end
+end