darwin.sigtool: init

pkgs/os-specific/darwin/sigtool/default.nix

···
+{ lib, stdenv, fetchFromGitHub, pkg-config, cmake, makeWrapper, openssl }:
+
+stdenv.mkDerivation {
+  name = "sigtool";
+
+  src = fetchFromGitHub {
+    owner = "thefloweringash";
+    repo = "sigtool";
+    rev = "4a3719b42dc91c3f513df94048851cc98e7c7fcf";
+    sha256 = "04ra1cx7k1sdbkj5yrvl0s3l333vpir8rnm8k1dh2zy1w0a6hpqa";
+  };
+
+  nativeBuildInputs = [ pkg-config makeWrapper ];
+  buildInputs = [ openssl ];
+
+  installFlags = [ "PREFIX=$(out)" ];
+
+  # Upstream (me) asserts the driver script is optional.
+  postInstall = ''
+    substitute $NIX_BUILD_TOP/$sourceRoot/codesign.sh $out/bin/codesign \
+      --replace sigtool "$out/bin/sigtool"
+    chmod a+x $out/bin/codesign
+  '';
+}

pkgs/top-level/darwin-packages.nix

···
     deps = [ pkgs.darwin.print-reexports ];
   } ../os-specific/darwin/print-reexports/setup-hook.sh;
 
+  sigtool = callPackage ../os-specific/darwin/sigtool { };
+
   maloader = callPackage ../os-specific/darwin/maloader {
   };