Add simple CI. At least it checks that all targets build

.circleci/config.yml

@@ -0,0 +1,18 @@
+version: 2
+
+jobs:
+  nix:
+    docker:
+      - image: nixos/nix:latest
+    working_directory: ~/NixGL
+    steps:
+      - checkout
+      - run:
+          name: Build all wrapper (with default version for nvidia)
+          command: nix-build ./all.nix
+
+workflows:
+  version: 2
+  nix_stack:
+    jobs:
+      - nix

all.nix

@@ -0,0 +1,4 @@
+import ./default.nix {
+  nvidiaVersion = "440.82";
+  nvidiaHash = "edd415acf2f75a659e0f3b4f27c1fab770cf21614e84a18152d94f0d004a758e";
+}

default.nix

@@ -29,8 +29,15 @@ let
     executable = true;
     destination = "/bin/${name}";
 
+
     checkPhase = ''
        ${nixpkgs.shellcheck}/bin/shellcheck "$out/bin/${name}"
+
+       # Check that all the files listed in the output binary exists
+       for i in $(${nixpkgs.pcre}/bin/pcregrep  -o0 '/nix/store/.*?/[^ ":]+' $out/bin/${name})
+       do
+         ls $i > /dev/null || (echo "File $i, referenced in $out/bin/${name} does not exists."; exit -1)
+       done
     '';
   };