docker/singularity images from nix

README.md

@@ -179,6 +179,25 @@ If you have `nix`, build and installation in your profile are as simple as:
 nix-build && nix-env -i ./result
 ```
 
+#### Docker and Singularity images with nix
+
+Nix is also able to build an Docker image, which can then be loaded by Docker and converted to a Singularity image.
+
+```
+nix-build docker.nix
+docker load < result
+singularity build wfmash.sif docker-daemon://wfmash-docker:latest
+```
+
+This can be run with Singularity like this:
+
+```
+singularity run wfmash.sif $ARGS
+```
+
+Where `$ARGS` are your typical command line arguments to `wfmash`.
+
+
 ### Bioconda
 
 `wfmash` recipes for Bioconda are available at https://anaconda.org/bioconda/wfmash.

docker.nix

@@ -0,0 +1,15 @@
+{ pkgs ? import <nixpkgs> { }
+, pkgsLinux ? import <nixpkgs> { system = "x86_64-linux"; }
+}:
+
+let
+  wfmash = pkgs.callPackage ./wfmash.nix { };
+in
+pkgs.dockerTools.buildImage {
+  name = "wfmash-docker";
+  tag = "latest";
+  copyToRoot = [ wfmash ];
+  config = {
+    Entrypoint = [ "${wfmash}/bin/wfmash" ];
+  };
+}

wfmash.nix

@@ -8,7 +8,7 @@ stdenv.mkDerivation rec {
     owner = "waveygang"; 
     repo = "wfmash";
     rev = "bcfbc14eff4874cda59c66a678fb7d69a31671c5";
-    sha256 = "sha256-KPjge/83CCj+AXAxQmt0Fsbcy7mNnGzH41l9oiebRPQ=";
+    sha256 = "sha256-1PNd58O1IjGf+PJPEZttK4S215AEXsI/hKG6kc1inLs=";
   };
 
   nativeBuildInputs = [ cmake makeWrapper ];