adds repoquality.

.gitlab-ci.yml

 # This file should be read like a 'pure' function and these variables act as
-# arguments.
-# Gitlab overrides with their local affectations when using the "include"
-# directive on this file.
+# arguments: Gitlab overrides with their local affectations when using the
+# "include" directive.
 variables:
   #The authoritative packaging source
   ARGOPKGS : "./default.nix"
   #Extra argonix arguments
   EXTRA : ""
 
-#This installs argonix before each step. The goal is for this command to be the
-#only unwrapped call to a nix binary in the whole CI setup of the project.  The
-#trick with XDG_CACHE_HOME is there to make sure that no state is propagated
-#through caching, making this file as much of a "pure" function as we can. the
+#This updates argonix before each step if necessary. The trick with
+#XDG_CACHE_HOME is there to make sure that no state is propagated through
+#caching, making this file as much of a "pure" function as we can. the
 #`argonix` binary does this too when wrapping nix utilities.
 before_script:
   - CACHE=$(mktemp -d --suffix=nixcache /tmp/deletable-nix-cache-XXXX)
@@ -22,6 +20,10 @@ stages:
   - build
   - test
 
+#calling other local files.
+include:
+  - local: '/gitlab-ci/repoquality.yml'
+
 ####### templates
 .build:
   stage: build

gitlab-ci/repoquality.yml

+#Importing this file adds repository quality check.
+repoquality:
+  stage: build
+  script:
+    - nix run -f "$ARGOPKGS" repoquality --command repoquality
+  tags:
+    - integration