Teach nix to build fonts instead of keeping them in-tree

flake.lock

@@ -2,11 +2,11 @@
   "nodes": {
     "flake-utils": {
       "locked": {
-        "lastModified": 1623875721,
-        "narHash": "sha256-A8BU7bjS5GirpAUv4QA+QnJ4CceLHkcXdRp4xITDB0s=",
+        "lastModified": 1631561581,
+        "narHash": "sha256-3VQMV5zvxaVLvqqUrNz3iJelLw30mIVSfZmAaauM3dA=",
         "owner": "numtide",
         "repo": "flake-utils",
-        "rev": "f7e004a55b120c02ecb6219596820fcd32ca8772",
+        "rev": "7e5bf3925f6fbdfaf50a2a7ca0be2879c4261d19",
         "type": "github"
       },
       "original": {
@@ -17,11 +17,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1624992828,
-        "narHash": "sha256-whhfrjqOa1BUQAQu4J0QSRUG+iZbTeJpnsl52kLPBfc=",
+        "lastModified": 1632768365,
+        "narHash": "sha256-dewSDOFvHS9mGXBOB8E4nciQ2QavKpsNRXMSnCKJOxE=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "520da1d00f26d2f4d31eb3cd3c5dc8b3a1e998c6",
+        "rev": "75b5e5ee2642c28687592c24420d2085c1238f4c",
         "type": "github"
       },
       "original": {

flake.nix

@@ -5,12 +5,35 @@
   inputs.flake-utils.url = "github:numtide/flake-utils";
 
   outputs = { self, nixpkgs, flake-utils }:
-    (flake-utils.lib.eachDefaultSystem (system:
-      let pkgs = nixpkgs.legacyPackages.${system};
+    {
+      overlay = self: super:
+        let
+          pkgs = nixpkgs.legacyPackages.${super.system};
+          buildIosevka = pkgs.callPackage ./nix/iosevka.nix;
+        in rec {
+          iosevka = buildIosevka { set = "mnemosyne"; };
+          iosevka-aile = buildIosevka { set = "aile-mnemosyne"; };
+          iosevka-etoile = buildIosevka { set = "etoile-mnemosyne"; };
+
+          fonts = pkgs.symlinkJoin {
+            name = "mnemosyne-fonts";
+            paths = [ iosevka iosevka-aile iosevka-etoile ];
+          };
+
+          erambler = pkgs.callPackage ./nix/build.nix { inherit fonts; };
+        };
+    } // flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs {
+          inherit system;
+          overlays = [ self.overlay ];
+        };
       in {
-        defaultPackage = pkgs.callPackage ./nix/build.nix { };
+        packages = {
+          inherit (pkgs) erambler iosevka iosevka-aile iosevka-etoile fonts;
+        };
+        defaultPackage = pkgs.erambler;
+
         devShell = pkgs.callPackage ./nix/shell.nix { };
-      })) // {
-        nixosModule = import ./nix/server.nix { inherit self; };
-      };
+      });
 }

nix/build.nix

@@ -1,13 +1,15 @@
-{ pkgs, ... }:
+{ pkgs, fonts, lndir, ... }:
 
 with pkgs;
 stdenv.mkDerivation {
   name = "erambler-html";
   src = ../.;
-  nativeBuildInputs = [ hugo ];
+  nativeBuildInputs = [ hugo fonts ];
   buildPhase = "hugo";
   installPhase = ''
     mkdir $out
-    cp -R public/* public/.well-known $out
+    cp -R public/* public/.well-known "$out"
+    mkdir -p "$out/font"
+    ${lndir}/bin/lndir -silent ${fonts} "$out/font"
   '';
 }

nix/iosevka.nix

@@ -0,0 +1,89 @@
+{ stdenv, lib, nodejs, nodePackages, remarshal, ttfautohint-nox
+, privateBuildPlan ? builtins.readFile ./private-build-plans.toml
+, extraParameters ? null, set ? null }:
+
+assert (privateBuildPlan != null) -> set != null;
+assert (extraParameters != null) -> set != null;
+
+let
+  # We don't know the attribute name for the Iosevka package as it
+  # changes not when our update script is run (which in turn updates
+  # node-packages.json, but when node-packages/generate.sh is run
+  # (which updates node-packages.nix).
+  #
+  # Doing it this way ensures that the package can always be built,
+  # although possibly an older version than ioseva-bin.
+  nodeIosevka =
+    (lib.findSingle (drv: drv ? packageName && drv.packageName == "iosevka")
+      (throw "no 'iosevka' package found in nodePackages")
+      (throw "multiple 'iosevka' packages found in nodePackages")
+      (lib.attrValues nodePackages)).override (drv: { dontNpmInstall = true; });
+in stdenv.mkDerivation rec {
+  pname = if set != null then "iosevka-${set}" else "iosevka";
+  inherit (nodeIosevka) version src;
+
+  nativeBuildInputs = [ nodejs nodeIosevka remarshal ttfautohint-nox ];
+
+  buildPlan = if builtins.isAttrs privateBuildPlan then
+    builtins.toJSON { buildPlans.${pname} = privateBuildPlan; }
+  else
+    privateBuildPlan;
+
+  inherit extraParameters;
+  passAsFile = [ "buildPlan" "extraParameters" ];
+
+  configurePhase = ''
+    runHook preConfigure
+    ${lib.optionalString (builtins.isAttrs privateBuildPlan) ''
+      remarshal -i "$buildPlanPath" -o private-build-plans.toml -if json -of toml
+    ''}
+    ${lib.optionalString (builtins.isString privateBuildPlan) ''
+      cp "$buildPlanPath" private-build-plans.toml
+    ''}
+    ${lib.optionalString (extraParameters != null) ''
+      echo -e "\n" >> params/parameters.toml
+      cat "$extraParametersPath" >> params/parameters.toml
+    ''}
+    ln -s ${nodeIosevka}/lib/node_modules/iosevka/node_modules .
+    runHook postConfigure
+  '';
+
+  buildPhase = ''
+    runHook preBuild
+    npm run build --no-update-notifier -- --jCmd=$NIX_BUILD_CORES contents::$pname >/dev/null
+    runHook postBuild
+  '';
+
+  installPhase = ''
+    runHook preInstall
+    install -d "$out/ttf"
+    install -d "$out/woff2"
+    install "dist/$pname/ttf"/* "$out/ttf"
+    install "dist/$pname/woff2"/* "$out/woff2"
+    install "dist/$pname/$pname.css" "$out"
+    runHook postInstall
+  '';
+
+  enableParallelBuilding = true;
+
+  passthru = { updateScript = ./update-default.sh; };
+
+  meta = with lib; {
+    homepage = "https://be5invis.github.io/Iosevka";
+    downloadPage = "https://github.com/be5invis/Iosevka/releases";
+    description = ''
+      Slender monospace sans-serif and slab-serif typeface inspired by Pragmata
+      Pro, M+ and PF DIN Mono, designed to be the ideal font for programming.
+    '';
+    license = licenses.ofl;
+    platforms = platforms.all;
+    maintainers = with maintainers; [
+      cstrahan
+      jfrankenau
+      ttuegel
+      babariviere
+      rileyinman
+      AluisioASG
+    ];
+  };
+}

nix/private-build-plans.toml

@@ -124,6 +124,10 @@ shape = "italic"
 menu = "italic"
 css = "italic"
 
+[buildPlans.iosevka-mnemosyne.widths.normal]
+shape = 500
+menu = 5
+css = "normal"
 
 
 [buildPlans.iosevka-etoile-mnemosyne]

themes/mnemosyne/static/font/iosevka-aile.css

@@ -1,36 +0,0 @@
-
-@font-face {
-	font-family: 'Iosevka Aile Web';
-	font-display: swap;
-	font-weight: 400;
-	font-stretch: normal;
-	font-style: normal;
-	src: url('woff2/iosevka-aile-mnemosyne-regular.woff2') format('woff2'), url('ttf/iosevka-aile-mnemosyne-regular.ttf') format('truetype');
-}
-
-@font-face {
-	font-family: 'Iosevka Aile Web';
-	font-display: swap;
-	font-weight: 400;
-	font-stretch: normal;
-	font-style: italic;
-	src: url('woff2/iosevka-aile-mnemosyne-italic.woff2') format('woff2'), url('ttf/iosevka-aile-mnemosyne-italic.ttf') format('truetype');
-}
-
-@font-face {
-	font-family: 'Iosevka Aile Web';
-	font-display: swap;
-	font-weight: 700;
-	font-stretch: normal;
-	font-style: normal;
-	src: url('woff2/iosevka-aile-mnemosyne-bold.woff2') format('woff2'), url('ttf/iosevka-aile-mnemosyne-bold.ttf') format('truetype');
-}
-
-@font-face {
-	font-family: 'Iosevka Aile Web';
-	font-display: swap;
-	font-weight: 700;
-	font-stretch: normal;
-	font-style: italic;
-	src: url('woff2/iosevka-aile-mnemosyne-bolditalic.woff2') format('woff2'), url('ttf/iosevka-aile-mnemosyne-bolditalic.ttf') format('truetype');
-}

themes/mnemosyne/static/font/iosevka-etoile.css

@@ -1,36 +0,0 @@
-
-@font-face {
-	font-family: 'Iosevka Etoile Web';
-	font-display: swap;
-	font-weight: 400;
-	font-stretch: normal;
-	font-style: normal;
-	src: url('woff2/iosevka-etoile-mnemosyne-regular.woff2') format('woff2'), url('ttf/iosevka-etoile-mnemosyne-regular.ttf') format('truetype');
-}
-
-@font-face {
-	font-family: 'Iosevka Etoile Web';
-	font-display: swap;
-	font-weight: 400;
-	font-stretch: normal;
-	font-style: italic;
-	src: url('woff2/iosevka-etoile-mnemosyne-italic.woff2') format('woff2'), url('ttf/iosevka-etoile-mnemosyne-italic.ttf') format('truetype');
-}
-
-@font-face {
-	font-family: 'Iosevka Etoile Web';
-	font-display: swap;
-	font-weight: 700;
-	font-stretch: normal;
-	font-style: normal;
-	src: url('woff2/iosevka-etoile-mnemosyne-bold.woff2') format('woff2'), url('ttf/iosevka-etoile-mnemosyne-bold.ttf') format('truetype');
-}
-
-@font-face {
-	font-family: 'Iosevka Etoile Web';
-	font-display: swap;
-	font-weight: 700;
-	font-stretch: normal;
-	font-style: italic;
-	src: url('woff2/iosevka-etoile-mnemosyne-bolditalic.woff2') format('woff2'), url('ttf/iosevka-etoile-mnemosyne-bolditalic.ttf') format('truetype');
-}

themes/mnemosyne/static/font/iosevka.css

@@ -1,72 +0,0 @@
-
-@font-face {
-	font-family: 'Iosevka Web';
-	font-display: swap;
-	font-weight: 400;
-	font-stretch: normal;
-	font-style: normal;
-	src: url('woff2/iosevka-mnemosyne-regular.woff2') format('woff2'), url('ttf/iosevka-mnemosyne-regular.ttf') format('truetype');
-}
-
-@font-face {
-	font-family: 'Iosevka Web';
-	font-display: swap;
-	font-weight: 400;
-	font-stretch: expanded;
-	font-style: normal;
-	src: url('woff2/iosevka-mnemosyne-extended.woff2') format('woff2'), url('ttf/iosevka-mnemosyne-extended.ttf') format('truetype');
-}
-
-@font-face {
-	font-family: 'Iosevka Web';
-	font-display: swap;
-	font-weight: 400;
-	font-stretch: normal;
-	font-style: italic;
-	src: url('woff2/iosevka-mnemosyne-italic.woff2') format('woff2'), url('ttf/iosevka-mnemosyne-italic.ttf') format('truetype');
-}
-
-@font-face {
-	font-family: 'Iosevka Web';
-	font-display: swap;
-	font-weight: 400;
-	font-stretch: expanded;
-	font-style: italic;
-	src: url('woff2/iosevka-mnemosyne-extendeditalic.woff2') format('woff2'), url('ttf/iosevka-mnemosyne-extendeditalic.ttf') format('truetype');
-}
-
-@font-face {
-	font-family: 'Iosevka Web';
-	font-display: swap;
-	font-weight: 700;
-	font-stretch: normal;
-	font-style: normal;
-	src: url('woff2/iosevka-mnemosyne-bold.woff2') format('woff2'), url('ttf/iosevka-mnemosyne-bold.ttf') format('truetype');
-}
-
-@font-face {
-	font-family: 'Iosevka Web';
-	font-display: swap;
-	font-weight: 700;
-	font-stretch: expanded;
-	font-style: normal;
-	src: url('woff2/iosevka-mnemosyne-extendedbold.woff2') format('woff2'), url('ttf/iosevka-mnemosyne-extendedbold.ttf') format('truetype');
-}
-
-@font-face {
-	font-family: 'Iosevka Web';
-	font-display: swap;
-	font-weight: 700;
-	font-stretch: normal;
-	font-style: italic;
-	src: url('woff2/iosevka-mnemosyne-bolditalic.woff2') format('woff2'), url('ttf/iosevka-mnemosyne-bolditalic.ttf') format('truetype');
-}
-
-@font-face {
-	font-family: 'Iosevka Web';
-	font-display: swap;
-	font-weight: 700;
-	font-stretch: expanded;
-	font-style: italic;
-	src: url('woff2/iosevka-mnemosyne-extendedbolditalic.woff2') format('woff2'), url('ttf/iosevka-mnemosyne-extendedbolditalic.ttf') format('truetype');
-}