Refactor inquisitor directory to interpolation

inquisitor.nix

@@ -10,13 +10,16 @@ let
   };
   inquisitor = pkgs.callPackage inquisitorSource {};
 
+  # Define the inquisitor data directory
+  inquisiDir = "/var/lib/inquisitor";
+
   # Create the inquisitor config file in the nix store, pointing to /var/lib/
   inquisitorConfig = pkgs.writeTextFile {
     name = "inquisitor.conf";
     text = ''
-      DataPath = /var/lib/inquisitor/data/
-      SourcePath = /var/lib/inquisitor/sources/
-      CachePath = /var/lib/inquisitor/cache/
+      DataPath = ${inquisiDir}/data/
+      SourcePath = ${inquisiDir}/sources/
+      CachePath = ${inquisiDir}/cache/
       Verbose = false
       LogFile = /var/log/inquisitor.log
     '';
@@ -25,15 +28,15 @@ let
   # Create a run script for the server that sets up all necessary state
   inquisitorRun = pkgs.writeShellScriptBin "run.sh" ''
     # Ensure inquisitor directories and inquisitor source folder
-    ${pkgs.coreutils}/bin/mkdir -p /var/lib/inquisitor/data/inquisitor/
-    ${pkgs.coreutils}/bin/mkdir -p /var/lib/inquisitor/sources/
-    ${pkgs.coreutils}/bin/mkdir -p /var/lib/inquisitor/cache/
-    if [ ! -f /var/lib/inquisitor/data/inquisitor/state ]; then
-      ${pkgs.coreutils}/bin/echo "{}" > /var/lib/inquisitor/data/inquisitor/state
+    ${pkgs.coreutils}/bin/mkdir -p ${inquisiDir}/data/inquisitor/
+    ${pkgs.coreutils}/bin/mkdir -p ${inquisiDir}/sources/
+    ${pkgs.coreutils}/bin/mkdir -p ${inquisiDir}/cache/
+    if [ ! -f ${inquisiDir}/data/inquisitor/state ]; then
+      ${pkgs.coreutils}/bin/echo "{}" > ${inquisiDir}/data/inquisitor/state
     fi
 
     # Run inquisitor
-    cd /var/lib/inquisitor/
+    cd ${inquisiDir}
     ${inquisitor}/bin/gunicorn \
       --bind=localhost:24133 \
       --workers=4 \
@@ -52,7 +55,7 @@ in
   users.users.inquisitor = {
     description = "Inquisitor service user";
     isSystemUser = true;
-    home = "/var/lib/inquisitor";
+    home = "${inquisiDir}";
     createHome = true;
     packages = [ inquisitor ];
   };