Adding an extend example (helm+oci)

helm-poc/nix/helm.nix

@@ -10,9 +10,10 @@ let
     url,
     hash ? lib.fakeSha25,
     namespace ? "",
-    patches ? []
+    patches ? [],
+    values ? ""
   }:
-    pkgs.stdenv.mkDerivation {
+    pkgs.stdenv.mkDerivation rec {
       inherit name patches;
 
       src = pkgs.fetchurl {
@@ -25,12 +26,14 @@ let
         "build" 
       ];
 
-      namespace = if namespace != "" then "--namespace ${namespace}" else "";
+      namespaceOpts = if namespace != "" then "--namespace ${namespace}" else "";
+      valuesOpts = if values != "" then "--values ${values}" else "";
 
       build = ''
         mkdir -p $out
         ${helm} template \
-          --namespace ${namespace} \
+          ${namespaceOpts} \
+          ${valuesOpts} \
           ${name} ./ > $out/${name}-${version}.yaml
         ${helm} version > $out/VERSION
       '';

poc-helm-oci/default.nix

@@ -0,0 +1,14 @@
+{
+  pkgs ? import <nixpkgs> {}
+, lib ? pkgs.lib
+, extend ? pkgs.extend
+}:
+let
+  extendedAttrs = extend (final: prev: {
+    localOutputs = {
+      manifests = final.callPackage ./packages/manifests {};
+      oci-image = final.callPackage ./packages/oci-image {};
+    };
+  });
+in
+  extendedAttrs.localOutputs

poc-helm-oci/packages/manifests/default.nix

@@ -0,0 +1,20 @@
+{
+  pkgs
+, lib
+, helmnix ? import ../../../helm-poc/nix/helm.nix {}
+}:
+helmnix.mkHelm rec {
+  name = "cert-manager";
+  version = "v1.14.4";
+  url = "https://charts.jetstack.io/charts/${name}-${version}.tgz";
+  hash = "sha256-V3X9vBiB1uUQ33bTh1OvVLhr0Uyqjtso/bt5UnBC3t4=";
+  values = ./../../values/cert-manager.yaml;
+}
+
+#pkgs.dockerTools.streamLayeredImage {
+#  name = "oci-image";
+#  includeStorePaths = false;
+#  fakeRootCommands = ''
+#    cp -Lr ${localOutputs.charts}/* .
+#    rm -fr nix
+#  '';

poc-helm-oci/packages/oci-image/default.nix

@@ -0,0 +1,18 @@
+{
+  pkgs,
+  lib,
+  localOutputs,
+}:
+pkgs.dockerTools.streamLayeredImage {
+  name = "oci-image";
+  includeStorePaths = false;
+  fakeRootCommands = ''
+    cp -Lr ${localOutputs.manifests}/* .
+    rm -fr nix
+  '';
+
+#  config.Entrypoint = ["${lib.getExe localOutputs.binaries.simple-package}"];
+#  contents = [
+#    pkgs.hello
+#  ];
+}

poc-helm-oci/values/cert-manager.yaml

@@ -0,0 +1 @@
+namespace: testaroo