init cli, add start of target docs

README.md

@@ -10,13 +10,11 @@ Kubernetes resource management with Nix
 
 ## Usage
 
-See [./docs/examples/](./docs/examples/) for now.
+Apply all resources with
 
-<!-- Apply all resources with
+    nix run github:hall/kubenix . -- apply
 
-    nix run github:hall/kubenix
-
-> **HINT**: run `nix run github:hall/kubenix -- --help` for more commands
+> **HINT**: run `nix run github:hall/kubenix . -- --help` for more commands
 
 A minimal example flake:
 
@@ -24,15 +22,20 @@ A minimal example flake:
 {
   inputs.kubenix = "github:hall/kubenix";
   outputs = {self, ...}@inputs: {
-    # nixosConfigurations.hostname = {
-    #   modules = [ inputs.kubenix.nixosModule ];
-    # };
-    kubernetes.cluster.resources.pod.test.spec.containers.nginx.image = "nginx";
+    nixosConfigurations.hostname = {
+      modules = [ inputs.kubenix.nixosModule ];
+    };
+    kubernetes.resources.pods."app" = {
+      spec.containers."app" = {
+        name = "app";
+        image = "nginx";
+      };
+    };
   }
 }
 ```
 
-A more complete example config:
+<!-- A more complete example config:
 
 ```nix
 {
@@ -42,7 +45,6 @@ A more complete example config:
     helm = {
       releases = {};
     };
-    docker = {};
   }
 }
 ``` -->

flake.nix

@@ -74,8 +74,13 @@
 
         devShells.default = import ./devshell {inherit pkgs inputs;};
 
-        packages = inputs.flake-utils.lib.flattenTree {
+        packages =
+          inputs.flake-utils.lib.flattenTree {
             inherit (pkgs) kubernetes kubectl;
+          }
+          // {
+            cli = pkgs.callPackage ./pkgs/kubenix.nix {};
+            default = self.packages.${system}.cli;
           };
 
         checks = let

pkgs/kubenix.nix

@@ -0,0 +1,60 @@
+{
+  lib,
+  writeShellScriptBin,
+  coreutils,
+  nix,
+  jq,
+}: let
+  name = "kubenix";
+in
+  lib.recursiveUpdate
+  (writeShellScriptBin name ''
+    set -Eeuo pipefail
+
+    NAME=${name}
+    function help() {
+      echo "
+      kubenix - Kubernetes resource management with Nix
+
+      commands:
+        apply    - create resources in target cluster
+        render   - print resource manifests to stdout
+      "
+    }
+
+    function apply() {
+      echo not impremented
+    }
+
+    function render() {
+      ${nix}/bin/nix eval '.#kubernetes' # | ${jq}/bin/jq 'fromjson'
+    }
+
+    while test $# -gt 0; do
+      case "$1" in
+        apply|"")
+          shift
+          apply
+          ;;
+        render)
+          shift
+          render
+          ;;
+        -h|--help)
+          help
+          exit 0
+          ;;
+        -v|--verbose)
+          shift
+          set -x
+          ;;
+        *)
+          help
+          exit 1
+          ;;
+      esac
+    done
+
+
+  '')
+  {meta.description = "";}