Build slides with Nix

flake.nix

@@ -1,25 +1,98 @@
 {
-  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.05";
+  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
 
   outputs =
     { nixpkgs, ... }:
     let
       system = "x86_64-linux";
-      pkgs = nixpkgs.legacyPackages.${system};
+      pkgs = import nixpkgs { inherit system; };
 
-      inherit (pkgs) mkShell nixfmt-classic;
-    in
-    {
-      devShells.${system}.default = mkShell {
-        packages = with pkgs; [
-          ghostscript
-          pdfpc
-          python310Packages.rst2pdf
-          texliveMedium # includes pdfjam
-          tree
-        ];
+      inherit (nixpkgs.lib) makeOverridable;
+      inherit (pkgs.stdenvNoCC) mkDerivation;
+
+      shared = mkDerivation {
+        name = "talks-shared";
+        src = ./src;
+
+        installPhase = ''
+          runHook preInstall
+
+          mkdir $out
+          cp -r fonts styles $out
+
+          runHook postInstall
+        '';
       };
 
-      formatter.${system} = nixfmt-classic;
+      commonBuildInputs = with pkgs; [
+        (python310.withPackages (p: with p; [ rst2pdf ]))
+      ];
+
+      mkTalk = makeOverridable (
+        { name, src }:
+        mkDerivation {
+          inherit name shared src;
+
+          buildInputs = commonBuildInputs;
+
+          buildPhase = ''
+            runHook preBuild
+
+            mkdir $out
+
+            rst2pdf slides.rst \
+              --break-level 1 \
+              --fit-background-mode scale \
+              --font-path "${toString shared}/fonts" \
+              --output "$out/slides.pdf" \
+              --stylesheets bw,"${toString shared}/styles/opdavies-light"
+
+            runHook postBuild
+          '';
+        }
+      );
+
+      talks = {
+        build-configs = mkTalk {
+          name = "build-configs";
+          src = ./src/building-build-configs;
+        };
+
+        sculpin = mkTalk {
+          name = "building-static-websites-sculpin";
+          src = ./src/building-static-websites-sculpin;
+        };
+
+        tailwind-css = mkTalk {
+          name = "taking-flight-with-tailwind-css";
+          src = ./src/taking-flight-with-tailwind-css;
+        };
+
+        test-driven-drupal = mkTalk {
+          name = "test-driven-drupal";
+          src = ./src/test-driven-drupal;
+        };
+      };
+    in
+    {
+      devShells.${system}.default =
+        with pkgs;
+        mkShell {
+          packages =
+            with pkgs;
+            commonBuildInputs
+            ++ [
+              ghostscript
+              just
+              pdfpc
+              texliveMedium # includes pdfjam
+            ];
+        };
+
+      packages.${system} = {
+        inherit shared;
+      } // talks;
+
+      formatter.${system} = pkgs.nixfmt-rfc-style;
     };
 }