1 files changed, 19 insertions, 16 deletions

diff --git a/utils.nix b/utils.nix
index 5bcbb10..2c231d7 100644
--- a/utils.nix
+++ b/utils.nix
@@ -20,23 +20,26 @@
         touch $out
       '';
     });
-  formatNix = baseTask.overrideAttrs (baseAttrs: {
-    name = "${baseAttrs.name}-nixfmt";
-    buildInputs = baseAttrs.buildInputs ++ [ pkgs.nixfmt ];
-    buildPhase = ''
-      format() {
-        nix_file="$1"
-        diff <(nixfmt < "$nix_file") "$nix_file" || {
-          echo "The $nix_file is unformatted. To fix it, run:"
-          echo "  nixfmt $nix_file"
-          exit 1
+  formatNix = ignoredFindPattern:
+    baseTask.overrideAttrs (baseAttrs: rec {
+      name = "${baseAttrs.name}-nixfmt";
+      buildInputs = baseAttrs.buildInputs ++ [ pkgs.nixfmt ];
+      ignoredPattern =
+        if ignoredFindPattern == null then "" else ignoredFindPattern;
+      buildPhase = ''
+        format() {
+          nix_file="$1"
+          diff <(nixfmt < "$nix_file") "$nix_file" || {
+            echo "The $nix_file is unformatted. To fix it, run:"
+            echo "  nixfmt $nix_file"
+            exit 1
+          }
         }
-      }
-      export -f format
-      find . -type f -name '*.nix' -print0 | xargs -0 -I{} bash -c "format {}" \;
-      touch $out
-    '';
-  });
+        export -f format
+        find . -type f \( -name '*.nix' -and -regextype egrep ! -regex '${ignoredPattern}' \) -print0 | xargs -0 -I{} bash -c "format {}" \;
+        touch $out
+      '';
+    });
   fixme = ignoredFiles:
     baseTask.overrideAttrs (baseAttrs: rec {
       name = "${baseAttrs.name}-fixme";