Makefile: handle creation of the ~/org-roam link

Makefile

@@ -4,8 +4,10 @@
 # the 'export' seems not to be necessary
 $(eval isGuix := $(shell command -v guix > /dev/null 2>&1 && echo t || echo f))
 $(eval destDir := $(shell [ "${isGuix}" = t ] && echo $${dotf}/bin || echo ~/bin))
+orgRoamLink := ${HOME}/org-roam
 
 all: show-environment clean install-deps
+	[ ! -L "${orgRoamLink}" ] && ln -s ${dev}/notes/notes "${orgRoamLink}" || :
 	[ ! -d ${destDir} ] && mkdir ${destDir} || :
 	raco exe -o ${destDir}/search-notes main.rkt
 	[ "${isGuix}" = t ] && gxhre --cores=${cores} || :

main.rkt

@@ -107,10 +107,7 @@ racket main.rkt -e \"/home/bost/der/search-notes/main.rkt /home/bost/der/search-
   ;; Thanks to https://stackoverflow.com/q/16266934 for a hint
   (define namespace (namespace-anchor->namespace a))
 
-  ;; this is the default location of the org-roam directory
-  ;; ~/org-roam is a symbolic link at the moment:
-  ;; $ ls -l ~/org-roam
-  ;; [...] /home/bost/org-roam -> /home/bost/dev/notes/notes
+  ;; This is the default location of the org-roam directory. See Makefile
   (define dir (format "~a/org-roam/" (getenv "HOME")))
 
   (define add-src-location-info #f)