feat(confpkg): restrict initialization hook

Restrict the babel calls triggered during tangling to those containing
"confpkg" in their name, rather than all babel call statements.

config.org

@@ -119,9 +119,10 @@ Luckily, I don't need to be able to understand code in order to do what I do bes
 
 If you're reading the raw org file instead of the published version, the code for =confpkg= is below. It is mostly unchanged, aside from these tweaks:
 
+- Prevent =confpkg='s code from being exported
 - Change the package template to contain my information
 - Reorganize to get rid of superfluous noweb references
-- Prevent the code from being exported
+- Hook into only babel calls that contain =confpkg= as a substring
 - Allow package statements anywhere in subconfig files, rather than only at the beginning
 
 ** confpkg :noexport:
@@ -135,8 +136,10 @@ If you're reading the raw org file instead of the published version, the code fo
       (message "Intitialising confpkg")
       (org-fold-core-ignore-fragility-checks
         (org-babel-map-executables nil
-          (when (eq (org-element-type (org-element-context)) 'babel-call)
-            (org-babel-lob-execute-maybe)))))
+          (let ((context (org-element-context)))
+            (and (eq (org-element-type context) 'babel-call)
+                 (string-match-p "confpkg" (org-element-property :call context))
+                 (org-babel-lob-execute-maybe))))))
   (quit (revert-buffer t t t)))
 #+end_src