feat(gen-docs): write nix code outside script

apps/gen-docs/getConfigMeta.nix

@@ -0,0 +1,12 @@
+configs: let
+  inherit (builtins) mapAttrs replaceStrings;
+
+  trimNewlines = s: replaceStrings ["\n"] [" "] s;
+in {
+  attrs =
+    mapAttrs (_: v: {
+      roleDesc = trimNewlines (v.config.meta.roleDescription or "");
+      hwDesc = trimNewlines (v.config.meta.hardwareDescription or "");
+    })
+    configs;
+}

apps/gen-docs/getPackageMeta.nix

@@ -0,0 +1,13 @@
+x: let
+  inherit (builtins) currentSystem mapAttrs removeAttrs replaceStrings;
+
+  trimNewlines = s: replaceStrings ["\n"] [" "] s;
+  packages = removeAttrs x.${currentSystem} ["default"];
+in {
+  attrs =
+    mapAttrs (_: v: {
+      desc = trimNewlines (v.meta.description or "");
+      homepage = v.meta.homepage or "";
+    })
+    packages;
+}

apps/gen-docs/script.sh

@@ -1,29 +1,16 @@
-getMetaFunc=$(cat << EOF
-(x: {
-    attrs = builtins.mapAttrs (_: v: {
-        desc = builtins.replaceStrings ["\n"] [" "] (v.meta.description or "");
-        homepage = v.meta.homepage or "";
-        roleDesc = builtins.replaceStrings ["\n"] [" "] (v.config.meta.roleDescription or "");
-        hwDesc = builtins.replaceStrings ["\n"] [" "] (v.config.meta.hardwareDescription or "");
-    }) (builtins.removeAttrs (x.\${builtins.currentSystem} or x) ["default"]);
-})
-EOF
-)
-
-
 substitute() {
     echo '' | pandoc --metadata-file <(
         nix eval \
             --impure \
             --json \
             "$FLAKE"#"$1" \
-            --apply "$getMetaFunc" |
+            --apply "import \"$FLAKE/apps/gen-docs/$3.nix\"" |
             jq -r
     ) -t markdown --template "$FLAKE/apps/gen-docs/templates/$2.md" -o "$FLAKE/$2/README.md"
 }
 
 # TODO: add homeManagerModules, lib, modules, nixFastChecks, overlays, scopedPackages
-substitute "appsPackages" "apps"
-substitute "nixosConfigurations" "configurations"
-substitute "devShells" "devShells"
-substitute "packages" "packages"
+substitute "appsPackages" "apps" "getPackageMeta"
+substitute "nixosConfigurations" "configurations" "getConfigMeta"
+substitute "devShells" "devShells" "getPackageMeta"
+substitute "packages" "packages" "getPackageMeta"

apps/gen-docs/templates/configurations.md

@@ -3,7 +3,7 @@
 This directory contains every device's main configuration file, their `hardware-configuration.nix` and some custom modules
 unique to them.
 
-## List of my Devices
+## List of my devices
 
 | Name      | Model / Specs | Description                                                                                      |
 | --------- | ------------- | ------------------------------------------------------------------------------------------------ |