Refactor fetchurl customizations for my mirror lists; just gryphel (m…

…inivmac) for now

default.nix

@@ -169,6 +169,10 @@ in {
         wine64Full = pkgs.wine64Packages.full;
     });
 
+    fetchurlRhys-T = pkgs.lib.mirrorFunctionArgs pkgs.fetchurl (args: (pkgs.fetchurl args).overrideAttrs (old: {
+        mirrorsFile = old.mirrorsFile.overrideAttrs (old: self.myLib.mirrors);
+    }));
+
     # _ciOnly.dev = pkgs.lib.optionalAttrs (pkgs.hostPlatform.system == "x86_64-darwin") (pkgs.lib.recurseIntoAttrs {
     #     checkpoint = pkgs.lib.recurseIntoAttrs (pkgs.lib.mapAttrs (k: pkgs.checkpointBuildTools.prepareCheckpointBuild) {
     #         inherit (self)

lib/default.nix

@@ -4,4 +4,5 @@ with pkgs.lib; {
   # Add your library functions here
   #
   # hexint = x: hexvals.${toLower x};
+  mirrors = import ./mirrors.nix;
 }

lib/mirrors.nix

@@ -0,0 +1,7 @@
+{
+    gryphel = [
+        "https://www.gryphel.com/"
+        "http://www.gryphel.org/"
+        "https://minivmac.github.io/gryphel-mirror/"
+    ];
+}

pkgs/minivmac/fetch.nix

@@ -1,4 +1,4 @@
-{ fetchurl, lib, version, hash }: let
+{ fetchurlRhys-T, lib, version, hash }: let
     versionChunks = (builtins.splitVersion version);
     aIndex = (lib.findFirst (x: x.v == "a") null (lib.imap0 (i: v: {inherit i v;}) versionChunks)).i or null;
     alphaNumber = builtins.elemAt versionChunks (aIndex+1);
@@ -7,15 +7,6 @@
     else
         "mirror://gryphel/d/minivmac/minivmac-${version}/minivmac-${version}.src.tgz"
     ;
-    gryphelMirrors = [
-        "https://www.gryphel.com/"
-        "http://www.gryphel.org/"
-        "https://minivmac.github.io/gryphel-mirror/"
-    ];
-in (fetchurl {
+in fetchurlRhys-T {
     inherit url hash;
-}).overrideAttrs (old: {
-    postHook = (if old.postHook or null != null then old.postHook else "") + ''
-        gryphel=${lib.escapeShellArg (builtins.concatStringsSep " " gryphelMirrors)}
-    '';
-})
+}