i-dot-ming: 7.01 -> 8.00

pkgs/data/fonts/i-dot-ming/default.nix

@@ -1,17 +1,39 @@
-{ lib, fetchzip }:
+{ lib, fetchurl, writeScript }:
 
 let
-  version = "7.01";
+  version = "8.00";
 in
-fetchzip {
+fetchurl {
   name = "i.ming-${version}";
   url = "https://raw.githubusercontent.com/ichitenfont/I.Ming/${version}/${version}/I.Ming-${version}.ttf";
-  sha256 = "1b2dj7spkznpkad8a0blqigj9f6ism057r0wn9wdqg5g88yp32vd";
+  hash = "sha256-JGu9H0+IdJL6QQtLwvqlFLEaJdq1JVRiqLm5zptwjyE=";
 
+  recursiveHash = true;
+  downloadToTemp = true;
   postFetch = ''
     install -DT -m444 $downloadedFile $out/share/fonts/truetype/I.Ming/I.Ming.ttf
   '';
 
+  passthru = {
+    updateScript = writeScript "updater" ''
+      #!/usr/bin/env nix-shell
+      #!nix-shell -i bash -p curl gnused
+      set -e
+      version=$(curl -i -s https://github.com/ichitenfont/I.Ming/releases/latest | sed -n -E 's|^location.*releases/tag/([0-9.]+).*$|\1|p')
+      if [[ $version != ${version} ]]; then
+        tmp=$(mktemp -d)
+        curl -Lo $tmp/I.Ming.ttf https://raw.githubusercontent.com/ichitenfont/I.Ming/$version/$version/I.Ming-$version.ttf
+        install -DT -m444 $tmp/I.Ming.ttf $tmp/share/fonts/truetype/I.Ming/I.Ming.ttf
+        rm $tmp/I.Ming.ttf
+        hash=$(nix hash path --type sha256 --base32 --sri $tmp)
+        sed -i -E \
+          -e "s/version = \"[0-9.]+\"/version = \"$version\"/" \
+          -e "s|hash = \".*\"|hash = \"$hash\"|" \
+          pkgs/data/fonts/i-dot-ming/default.nix
+      fi
+    '';
+  };
+
   meta = with lib; {
     description = "An open source Pan-CJK serif typeface";
     homepage = "https://github.com/ichitenfont/I.Ming";