Fix empty TRITONSHELL_DATA_CENTERS var

pkgs/triton-docker-env-shell.nix

@@ -6,9 +6,14 @@ with pkgs.nodePackages;
   # Docs: https://docs.greenbaum.cloud/en/devops/triton-cli.html
   # triton CLI source: https://github.com/tritonDataCenter/node-triton
   cnsBaseDomain=$TRITONSHELL_CNS_BASE_DOMAIN
-  dataCenters=$TRITONSHELL_DATA_CENTERS
   mantaDomain=$TRITONSHELL_MANTA_DOMAIN
   tritonApiDomain=$TRITONSHELL_TRITON_API_DOMAIN
+  if [ -n "$ZSH_VERSION" ]; then
+    IFS=" " read -r -A dataCenters <<< "$TRITONSHELL_DATA_CENTERS"
+  elif [ -n "$BASH_VERSION" ]; then
+    # https://github.com/koalaman/shellcheck/wiki/SC2206
+    IFS=" " read -r -a dataCenters <<< "$TRITONSHELL_DATA_CENTERS"
+  fi
 
   # Set triton and docker host environment variables
   eval "$(${triton}/bin/triton env)"

tritonshell.nix

@@ -97,7 +97,7 @@ in
     extra = ''
       export \
         TRITONSHELL_CNS_BASE_DOMAIN=${cnsBaseDomain} \
-        TRITONSHELL_DATA_CENTERS=(${pkgs.lib.concatStringsSep " " dataCenters}) \
+        TRITONSHELL_DATA_CENTERS="${pkgs.lib.concatStringsSep " " dataCenters}" \
         TRITONSHELL_MANTA_DOMAIN=${mantaDomain} \
         TRITONSHELL_TRITON_API_DOMAIN=${tritonApiDomain}
       if [ -z "$TRITON_DONT_SOURCE_PROFILE" ]; then