nixpkgs: add symbiyosys, for HDL verification flows

Signed-off-by: Austin Seipp <aseipp@pobox.com>

pkgs/applications/science/logic/symbiyosys/default.nix

@@ -0,0 +1,37 @@
+{ stdenv, fetchFromGitHub, yosys, python3 }:
+
+stdenv.mkDerivation rec {
+  name = "symbiyosys-${version}";
+  version = "2017.10.16";
+
+  src = fetchFromGitHub {
+    owner  = "cliffordwolf";
+    repo   = "symbiyosys";
+    rev    = "f403b99fae053baab651e3ec8345a68cb3ba6a96";
+    sha256 = "0jzzlybxaqmhrasfjv3q3skshalr7lvv4p142qgdqz1ig36znbi8";
+  };
+
+  buildInputs = [ python3 yosys ];
+
+  buildPhase = "true";
+  installPhase = ''
+    mkdir -p $out/bin $out/share/yosys/python3
+
+    cp sbysrc/sby_*.py $out/share/yosys/python3/
+    cp sbysrc/sby.py $out/bin/sby
+    chmod +x $out/bin/sby
+
+    # Fix up shebang and Yosys imports
+    patchShebangs $out/bin/sby
+    substituteInPlace $out/bin/sby \
+      --replace "##yosys-sys-path##" \
+                "sys.path += [p + \"/share/yosys/python3/\" for p in [\"$out\", \"${yosys}\"]]"
+  '';
+  meta = {
+    description = "Yosys verification tools for Hardware Definition Languages";
+    homepage    = https://symbiyosys.readthedocs.io/;
+    license     = stdenv.lib.licenses.mit;
+    maintainers = with stdenv.lib.maintainers; [ thoughtpolice ];
+    platforms   = stdenv.lib.platforms.linux;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -18684,6 +18684,8 @@ with pkgs;
 
   boolector = callPackage ../applications/science/logic/boolector {};
 
+  symbiyosys = callPackage ../applications/science/logic/symbiyosys {};
+
   ### SCIENCE / ELECTRONICS
 
   adms = callPackage ../applications/science/electronics/adms { };