enable ccache

machines/AMD-Workstation/default.nix

@@ -17,7 +17,7 @@
     customProfiles.wine-games
 
     customProfiles.ollama
-  ];
+    customProfiles.ccache
 
   security.pki.certificateFiles = [ ../../misc/mitmproxy-ca-cert.pem ];
 

profiles/ccache.nix

@@ -0,0 +1,28 @@
+{ config, lib, ... }: {
+  programs.ccache = {
+    enable = true;
+    cacheDir = "/var/lib/ccache";
+    # packageNames = [ "grub2" ];
+  };
+  nix.settings.extra-sandbox-paths = [ config.programs.ccache.cacheDir ];
+
+  persist.state.directories = lib.mkIf (config.deviceSpecific.devInfo.fileSystem != "zfs") [
+    config.programs.ccache.cacheDir
+  ];
+
+  nixpkgs.overlays = [
+    (final: prev: {
+      ccacheWrapper = prev.ccacheWrapper.override {
+        # export CCACHE_SLOPPINESS=random_seed,pch_defines,time_macros,include_file_mtime,include_file_ctime
+        extraConfig = ''
+          export CCACHE_NOCOMPRESS=true
+          export CCACHE_MAXSIZE=15G
+          export CCACHE_DIR="${config.programs.ccache.cacheDir}"
+          export CCACHE_UMASK=007
+          export CCACHE_SLOPPINESS=random_seed
+          export CCACHE_BASEDIR=$NIX_BUILD_TOP
+        '';
+      };
+    })
+  ];
+}