From 7db6817a0b5afcf89e3c7eafc031a7eec59ee24e Mon Sep 17 00:00:00 2001
From: Serge Bazanski <serge@bazanski.pl>
Date: Fri, 13 Jul 2018 22:02:53 +0100
Subject: [PATCH] Add Nix(OS) support

---
 README.md   | 15 +++++++++++++++
 default.nix | 28 ++++++++++++++++++++++++++++
 nextpnr.nix | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 96 insertions(+)
 create mode 100644 default.nix
 create mode 100644 nextpnr.nix

diff --git a/README.md b/README.md
index da38500d..eb96bd1c 100644
--- a/README.md
+++ b/README.md
@@ -78,6 +78,21 @@ Running
  `./nextpnr-ecp5 --json ecp5/synth/blinky.json --basecfg ecp5/synth/ulx3s_empty.config --bit ecp5/synth/ulx3s.bit`
     - Note that `ulx3s_empty.config` contains fixed/unknown bits to be copied to the output bitstream
     - You can also use `--textcfg out.config` to write a text file describing the bitstream for debugging
+
+Nix
+---
+
+As an alternative to getting the prerequisites yourself, you can use Nix/NixOS and run the following to get dropped into a shell with nextpnr built:
+
+   nix-shell
+
+Or, you can add the `nextpnr.nix` file into your /etc/nixos/configuration.nix:
+
+   environment.systemPackages = [
+       ...
+       ( import /home/q3k/Software/nextpnr/nextpnr.nix )
+       ...
+   ];
   
 Notes
 -------
diff --git a/default.nix b/default.nix
new file mode 100644
index 00000000..664e3669
--- /dev/null
+++ b/default.nix
@@ -0,0 +1,28 @@
+#
+# nextpnr -- Next Generation Place and Route
+#
+# Copyright (C) 2018  Serge Bazanski  <q3k@symbioticeda.com>
+#
+# Permission to use, copy, modify, and/or distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+#
+
+
+with import <nixpkgs> {};
+
+stdenv.mkDerivation rec {
+  name = "env";
+  env = buildEnv { name = name; paths = buildInputs; };
+  buildInputs = [
+    ( import ./nextpnr.nix )
+  ];
+}
diff --git a/nextpnr.nix b/nextpnr.nix
new file mode 100644
index 00000000..97097749
--- /dev/null
+++ b/nextpnr.nix
@@ -0,0 +1,53 @@
+#
+# nextpnr -- Next Generation Place and Route
+#
+# Copyright (C) 2018  Serge Bazanski  <q3k@symbioticeda.com>
+#
+# Permission to use, copy, modify, and/or distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+#
+
+with import <nixpkgs> {};
+
+let
+  gitRev    = "a8c84e90a39c54174dd24b5b76bd17aed8311481";
+  gitBranch = "master";
+in
+  stdenv.mkDerivation rec {
+    name    = "nextpnr-${version}";
+    version = "1.0.0";
+
+    src = ./.;
+
+    buildInputs = [
+      python3 (boost.override { python = python3; })
+      qt5.qtbase
+    ];
+
+    nativeBuildInputs = [ cmake icestorm ];
+
+    cmakeFlags= [
+      "-DARCH=ice40"
+      "-DICEBOX_ROOT=${icestorm}/share/icebox"
+    ];
+
+    enableParallelBuilding = true;
+
+    meta = with stdenv.lib; {
+      description = "A computer-aided design (CAD) tool from a parallel universe";
+      homepage    = "https://github.com/mkeeter/antimony";
+      license     = licenses.bsd0;
+      platforms   = platforms.linux;
+    };
+  }
+
+