1 files changed, 19 insertions, 0 deletions

diff --git a/coverage.nix b/coverage.nix
new file mode 100644
index 0000000..ed03ce8
--- /dev/null
+++ b/coverage.nix
@@ -0,0 +1,19 @@
+{ pkgs ? import ./nixpkgs-pinned.nix {} }:
+(import ./default.nix { inherit pkgs; }).overrideAttrs (final: prev: {
+  name = "mininix-coverage";
+
+  nativeBuildInputs = prev.nativeBuildInputs ++ [
+    pkgs.ocaml-ng.ocamlPackages_4_14.bisect_ppx
+  ];
+
+  checkPhase = ''
+    dune test --instrument-with bisect_ppx --force
+  '';
+
+  installPhase = ''
+    mkdir -p $out/coverage
+    bisect-ppx-report summary --per-file > $out/coverage/report-plain
+    bisect-ppx-report html
+    cp -R _coverage $out/coverage/html/
+  '';
+})