feat: nix build

.gitignore

@@ -2,3 +2,4 @@ book
 .vitepress/cache
 .vitepress/dist
 node_modules
+result

flake.nix

@@ -0,0 +1,97 @@
+{
+  description = "Transky-book's Nix flake";
+  nixConfig =
+    {
+      experimental-features = [ "nix-command" "flakes" ];
+      substituters = [
+        # "https://mirrors.cernet.edu.cn/nix-channels/store"
+        # "https://mirrors.bfsu.edu.cn/nix-channels/store"
+        "https://cache.nixos.org/"
+      ];
+      extra-substituters = [
+        "https://cryolitia.cachix.org"
+      ];
+      extra-trusted-public-keys = [
+        "cryolitia.cachix.org-1:/RUeJIs3lEUX4X/oOco/eIcysKZEMxZNjqiMgXVItQ8="
+      ];
+    };
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+
+    nur-cryolitia = {
+      url = "github:Cryolitia/nur-packages";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = { self, nixpkgs, nur-cryolitia }:
+    {
+      packages.x86_64-linux.default =
+        let
+          pkgs = import nixpkgs {
+            system = "x86_64-linux";
+            overlays = [
+              (final: prev: {
+                nur-cryolitia = nur-cryolitia.packages."${prev.system}";
+              })
+            ];
+          };
+        in
+        pkgs.callPackage (
+          { lib
+          , stdenvNoCC
+          , calibre
+          , mdbook
+          , mdbook-epub
+          , nur-cryolitia
+          , source-han-serif
+          }:
+
+          stdenvNoCC.mkDerivation
+            rec {
+              pname = "transky-book";
+              version = "unstable";
+
+              src = ./.;
+
+              nativeBuildInputs = [
+                calibre
+                mdbook
+                mdbook-epub
+                nur-cryolitia.mdbook-typst-pdf
+                source-han-serif
+              ];
+
+              buildPhase = ''
+                runHook preBuild
+
+                find src/ -type f -name "*.md" ! -path "src/index.md" -exec \
+                  sed -i "/^---$/,/^---$/d" {} \;
+
+                mdbook build
+
+                mkdir -p book/mobi
+                ebook-convert book/epub/药娘的天空.epub book/mobi/药娘的天空.mobi
+
+                runHook postBuild
+              '';
+
+              installPhase = ''
+                runHook preInstall
+
+                mkdir -p $out/share/transky-book
+                cp -r book $out/share/transky-book/
+
+                runHook postInstall
+              '';
+
+              meta = with lib; {
+                description = "药娘的天空";
+                homepage = "https://github.com/transky-book/transky";
+                license = licenses.cc-by-nc-sa-40;
+                maintainers = with maintainers; [ Cryolitia ];
+              };
+            }
+        ) {};
+    };
+}

theme/template.typ

@@ -1,14 +1,7 @@
 #set text(
   lang: "zh",
   font: (
-    "Noto Sans",
-    "Noto Sans SC",
-    "Noto Sans KR",
-    "Noto Sans Thai",
-    "Noto Sans Arabic",
-    "Noto Sans Hebrew",
-    "Noto Sans Devanagari",
-    "Noto Emoji",
+    "Source Han Serif",
   ),
 )