From 301f88dd02eafd923034d798c391130c08175499 Mon Sep 17 00:00:00 2001
From: Doron Behar <doron.behar@gmail.com>
Date: Fri, 9 Sep 2022 18:23:14 +0300
Subject: [PATCH 1/2] nerdfonts: add update.sh script to passthru

---
 pkgs/data/fonts/nerdfonts/default.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pkgs/data/fonts/nerdfonts/default.nix b/pkgs/data/fonts/nerdfonts/default.nix
index 7c4db29467fb..dbbb26971baa 100644
--- a/pkgs/data/fonts/nerdfonts/default.nix
+++ b/pkgs/data/fonts/nerdfonts/default.nix
@@ -59,6 +59,7 @@ stdenv.mkDerivation rec {
       rm -rfv $out/share/fonts/truetype/NerdFonts/*Windows\ Compatible.*
     ''}
   '';
+  passthru.updateScript = ./update.sh;
 
   meta = with lib; {
     description = "Iconic font aggregator, collection, & patcher. 3,600+ icons, 50+ patched fonts";

From ea33175d186cfa05ead3cd082bf0a49907f20638 Mon Sep 17 00:00:00 2001
From: Doron Behar <doron.behar@gmail.com>
Date: Thu, 2 Mar 2023 10:16:55 +0200
Subject: [PATCH 2/2] nerdfonts: Don't update if no updates are available

---
 pkgs/data/fonts/nerdfonts/update.sh | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/pkgs/data/fonts/nerdfonts/update.sh b/pkgs/data/fonts/nerdfonts/update.sh
index b4c4aaa7cf2b..53d240feddd8 100755
--- a/pkgs/data/fonts/nerdfonts/update.sh
+++ b/pkgs/data/fonts/nerdfonts/update.sh
@@ -5,9 +5,14 @@ latest_release=$(curl --silent https://api.github.com/repos/ryanoasis/nerd-fonts
 version=$(jq -r '.tag_name' <<<"$latest_release")
 
 dirname="$(dirname "$0")"
-echo \""${version#v}"\" >"$dirname/version.nix"
-
-echo Using version "$version"
+echo \""${version#v}"\" >"$dirname/version-new.nix"
+if diff -q "$dirname/version-new.nix" "$dirname/version.nix"; then
+    echo No new version available, current: $version
+    exit 0
+else
+    echo Updated to version "$version"
+    mv "$dirname/version-new.nix" "$dirname/version.nix"
+fi
 
 printf '{\n' > "$dirname/shas.nix"