From a880ab2e98d935ab2b77c4c0ca82b3fd8358a988 Mon Sep 17 00:00:00 2001
From: toonn <toonn@toonn.io>
Date: Sat, 8 Aug 2020 21:00:04 +0200
Subject: [PATCH] joypixels: Refactor to group system-specific variables

---
 pkgs/data/fonts/joypixels/default.nix | 58 ++++++++++++---------------
 1 file changed, 25 insertions(+), 33 deletions(-)

diff --git a/pkgs/data/fonts/joypixels/default.nix b/pkgs/data/fonts/joypixels/default.nix
index 3385209880f..eb9bc5cf910 100644
--- a/pkgs/data/fonts/joypixels/default.nix
+++ b/pkgs/data/fonts/joypixels/default.nix
@@ -4,47 +4,35 @@ let inherit (stdenv.hostPlatform) system;
 
     throwSystem = throw "Unsupported system: ${system}";
 
-    systemTag = {
-      x86_64-darwin = "nix-darwin";
-      x86_64-linux = "nix-os";
+    systemSpecific = {
+      x86_64-darwin = rec {
+        systemTag =  "nix-darwin";
+        capitalized = systemTag;
+        ext = "ttc";
+        fontFile = "Apple%20Color%20Emoji.ttc";
+        name = "joypixels-apple-color-emoji.ttc";
+      };
+      x86_64-linux = rec {
+        systemTag = "nix-os";
+        capitalized = "NixOS";
+        ext = "ttf";
+        fontFile = "joypixels-android.ttf";
+        name = fontFile;
+      };
     }.${system} or throwSystem;
 
-    capitalized = {
-      x86_64-darwin = systemTag;
-      x86_64-linux = "NixOS";
-    }.${system} or throwSystem;
-
-    fontFile = {
-      x86_64-darwin = "Apple%20Color%20Emoji.ttc";
-      x86_64-linux = "joypixels-android.ttf";
-    }.${system} or throwSystem;
-
-    name = {
-      x86_64-darwin = "joypixels-apple-color-emoji.ttc";
-      x86_64-linux = fontFile;
-    }.${system} or throwSystem;
-
-    ext = {
-      x86_64-darwin = "ttc";
-      x86_64-linux = "ttf";
-    }.${system} or throwSystem;
-
-    joypixels-free-license = {
+    joypixels-free-license = with systemSpecific; {
       spdxId = "LicenseRef-JoyPixels-Free-6.0";
       fullName = "JoyPixels Free License Agreement 6.0";
       url = "https://cdn.joypixels.com/distributions/${systemTag}/license/free-license.pdf";
     };
-    joypixels-license-appendix = {
+
+    joypixels-license-appendix = with systemSpecific; {
       spdxId = "LicenseRef-JoyPixels-NixOS-Appendix";
       fullName = "JoyPixels ${capitalized} License Appendix";
       url = "https://cdn.joypixels.com/distributions/${systemTag}/appendix/joypixels-license-appendix.pdf";
     };
 
-    sha256 = {
-      x86_64-darwin = "043980g0dlp8vd4qkbx6298fwz8ns0iwbxm0f8czd9s7n2xm4npq";
-      x86_64-linux = "1vxqsqs93g4jyp01r47lrpcm0fmib2n1vysx32ksmfxmprimb75s";
-    }.${system} or throwSystem;
-
 in
 
 assert !acceptLicense -> throw ''
@@ -63,14 +51,18 @@ stdenv.mkDerivation rec {
   pname = "joypixels";
   version = "6.0.0";
 
-  src = fetchurl {
-    inherit name sha256;
+  src = with systemSpecific; fetchurl {
+    inherit name;
     url = "https://cdn.joypixels.com/distributions/${systemTag}/font/${version}/${fontFile}";
+    sha256 = {
+      x86_64-darwin = "043980g0dlp8vd4qkbx6298fwz8ns0iwbxm0f8czd9s7n2xm4npq";
+      x86_64-linux = "1vxqsqs93g4jyp01r47lrpcm0fmib2n1vysx32ksmfxmprimb75s";
+    }.${system} or throwSystem;
   };
 
   dontUnpack = true;
 
-  installPhase = ''
+  installPhase = with systemSpecific; ''
     install -Dm644 $src $out/share/fonts/truetype/joypixels.${ext}
   '';