add support for vals (#11)

pkgs/kubenix.nix

@@ -3,6 +3,7 @@
   kubectl,
   kubernetes-helm,
   nix,
+  vals,
   writeShellScriptBin,
 }:
 writeShellScriptBin "kubenix" ''
@@ -28,7 +29,7 @@ writeShellScriptBin "kubenix" ''
   function _helm() {
     ${nix}/bin/nix eval ".#kubenix.$SYSTEM.config.kubernetes.helm" --json | jq -c '.releases[] | del(.objects)' | while read -r release; do
       values=$(mktemp)
-      echo "$release" | jq -r '.values' > $values
+      echo "$release" | jq -r '.values' | ${vals}/bin/vals eval > $values
 
       ${kubernetes-helm}/bin/helm $@ \
         -n $(echo "$release" | jq -r '.namespace // "default"') \
@@ -52,7 +53,7 @@ writeShellScriptBin "kubenix" ''
       render)
         cat $MANIFESTS;;
       *)
-        ${kubectl}/bin/kubectl $@ -f $MANIFESTS || true;;
+        cat $MANIFESTS | ${vals}/bin/vals eval | ${kubectl}/bin/kubectl $@ -f - || true;;
     esac
   }
 

pkgs/vals.nix

@@ -0,0 +1,17 @@
+{
+  buildGoModule,
+  fetchFromGitHub,
+}:
+buildGoModule rec {
+  pname = "vals";
+  version = "0.18.0";
+  src = fetchFromGitHub {
+    owner = "variantdev";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "sha256-R0Au34zywb0nv5LOvLb+7wSfn563uzQgiH3mefMlX7A=";
+  };
+
+  vendorSha256 = "sha256-fsTUgtMFDPjNJVhBlyq/rWAhOEAOSRQx3l1K0nNK2J8=";
+  checkPhase = null;
+}