Arg and env-var parsing

CodexNetDeployer/ArgOrVar.cs

@@ -0,0 +1,89 @@
+namespace CodexNetDeployer
+{
+    public class ArgOrVar
+    {
+        public static readonly ArgVar CodexImage = new ArgVar("codex-image", "CODEXIMAGE", "Docker image of Codex.");
+        public static readonly ArgVar GethImage = new ArgVar("geth-image", "GETHIMAGE", "Docker image of Geth.");
+        public static readonly ArgVar ContractsImage = new ArgVar("contracts-image", "CONTRACTSIMAGE", "Docker image of Codex Contracts deployer.");
+        public static readonly ArgVar KubeConfigFile = new ArgVar("kube-config", "KUBECONFIG", "Path to Kubeconfig file.");
+        public static readonly ArgVar KubeNamespace = new ArgVar("kube-namespace", "KUBENAMESPACE", "Kubernetes namespace to be used for deployment.");
+        public static readonly ArgVar NumberOfCodexNodes = new ArgVar("nodes", "NODES", "Number of Codex nodes to be created.");
+        public static readonly ArgVar StorageQuota = new ArgVar("storage-quota", "STORAGEQUOTA", "Storage quota in megabytes used by each Codex node.");
+
+        private readonly string[] args;
+
+        public ArgOrVar(string[] args)
+        {
+            this.args = args;
+        }
+
+        public string Get(ArgVar key, string defaultValue = "")
+        {
+            var argKey = $"--{key.Arg}=";
+            var arg = args.FirstOrDefault(a => a.StartsWith(argKey));
+            if (arg != null)
+            {
+                return arg.Substring(argKey.Length);
+            }
+
+            var env = Environment.GetEnvironmentVariable(key.Var);
+            if (env != null)
+            {
+                return env;
+            }
+
+            return defaultValue;
+        }
+        
+        public int? GetInt(ArgVar key)
+        {
+            var str = Get(key);
+            if (string.IsNullOrEmpty(str)) return null;
+            if (int.TryParse(str, out int result))
+            {
+                return result;
+            }
+            return null;
+        }
+
+        public void PrintHelp()
+        {
+            var nl = Environment.NewLine;
+            Console.WriteLine("CodexNetDeployer allows you to easily deploy multiple Codex nodes in a Kubernetes cluster. " +
+                "The deployer will set up the required supporting services, deploy the Codex on-chain contracts, start and bootstrap the Codex instances. " +
+                "All Kubernetes objects will be created in the namespace provided, allowing you to easily find, modify, and delete them afterwards." + nl);
+
+
+            Console.Write("\t[ CLI argument ] or [ Environment variable ]");
+            Console.CursorLeft = 70;
+            Console.Write("(Description)" + nl);
+            var fields = GetType().GetFields();// System.Reflection.BindingFlags.Public & System.Reflection.BindingFlags.Static);
+            foreach (var field in fields)
+            {
+                var value = (ArgVar)field.GetValue(null)!;
+                value.PrintHelp();
+            }
+        }
+    }
+
+    public class ArgVar
+    {
+        public ArgVar(string arg, string var, string description)
+        {
+            Arg = arg;
+            Var = var;
+            Description = description;
+        }
+
+        public string Arg { get; }
+        public string Var { get; }
+        public string Description { get; }
+
+        public void PrintHelp()
+        {
+            Console.Write($"\t[ --{Arg}=... ] or [ {Var}=... ]");
+            Console.CursorLeft = 70;
+            Console.Write(Description + Environment.NewLine);
+        }
+    }
+}

CodexNetDeployer/CodexNetDeployer.csproj

@@ -7,4 +7,8 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
+  <ItemGroup>
+    <ProjectReference Include="..\DistTestCore\DistTestCore.csproj" />
+  </ItemGroup>
+
 </Project>

CodexNetDeployer/Configuration.cs

@@ -0,0 +1,84 @@
+namespace CodexNetDeployer
+{
+    public class Configuration
+    {
+        public Configuration(
+            string codexImage,
+            string gethImage,
+            string contractsImage,
+            string kubeConfigFile,
+            string kubeNamespace,
+            int? numberOfCodexNodes,
+            int? storageQuota)
+        {
+            CodexImage = codexImage;
+            GethImage = gethImage;
+            ContractsImage = contractsImage;
+            KubeConfigFile = kubeConfigFile;
+            KubeNamespace = kubeNamespace;
+            NumberOfCodexNodes = numberOfCodexNodes;
+            StorageQuota = storageQuota;
+        }
+
+        public string CodexImage { get; }
+        public string GethImage { get; }
+        public string ContractsImage { get; }
+        public string KubeConfigFile { get; }
+        public string KubeNamespace { get; }
+        public int? NumberOfCodexNodes { get; }
+        public int? StorageQuota { get; }
+
+        public void PrintConfig()
+        {
+            ForEachProperty(onString: Print, onInt: Print);
+        }
+
+        public List<string> Validate()
+        {
+            var errors = new List<string>();
+
+            ForEachProperty(
+                onString: (n, v) => StringIsSet(n, v, errors),
+                onInt: (n, v) => IntIsOverZero(n, v, errors));
+
+            return errors;
+        }
+
+        private void ForEachProperty(Action<string, string> onString, Action<string, int?> onInt)
+        {
+            var properties = GetType().GetProperties();
+            foreach (var p in properties)
+            {
+                if (p.PropertyType == typeof(string)) onString(p.Name, (string)p.GetValue(this)!);
+                if (p.PropertyType == typeof(int?)) onInt(p.Name, (int?)p.GetValue(this)!);
+            }
+        }
+
+        private static void IntIsOverZero(string variable, int? value, List<string> errors)
+        {
+            if (value == null || value.Value < 1)
+            {
+                errors.Add($"{variable} is must be set and must be greater than 0.");
+            }
+        }
+
+        private static void StringIsSet(string variable, string value, List<string> errors)
+        {
+            if (string.IsNullOrWhiteSpace(value))
+            {
+                errors.Add($"{variable} is must be set.");
+            }
+        }
+
+        private static void Print(string variable, string value)
+        {
+            Console.WriteLine($"\t{variable}: '{value}'");
+        }
+
+        private static void Print(string variable, int? value)
+        {
+            if (value != null) Print(variable, value.ToString()!);
+            else Print(variable, "<NONE>");
+        }
+    }
+}

CodexNetDeployer/Program.cs

@@ -1,7 +1,46 @@
-public class Program
+using CodexNetDeployer;
+using DistTestCore.Codex;
+using DistTestCore.Marketplace;
+
+public class Program
 {
     public static void Main(string[] args)
     {
-        Console.WriteLine("Hello, World!");
+        var nl = Environment.NewLine;
+        Console.WriteLine("CodexNetDeployer" + nl + nl);
+
+        var argOrVar = new ArgOrVar(args);
+
+        if (args.Any(a => a == "-h" || a == "--help" || a == "-?"))
+        {
+            argOrVar.PrintHelp();
+            return;
+        }
+
+        var config = new Configuration(
+            codexImage: argOrVar.Get(ArgOrVar.CodexImage, CodexContainerRecipe.DockerImage),
+            gethImage: argOrVar.Get(ArgOrVar.GethImage, GethContainerRecipe.DockerImage),
+            contractsImage: argOrVar.Get(ArgOrVar.ContractsImage, CodexContractsContainerRecipe.DockerImage),
+            kubeConfigFile: argOrVar.Get(ArgOrVar.KubeConfigFile),
+            kubeNamespace: argOrVar.Get(ArgOrVar.KubeNamespace),
+            numberOfCodexNodes: argOrVar.GetInt(ArgOrVar.NumberOfCodexNodes),
+            storageQuota: argOrVar.GetInt(ArgOrVar.StorageQuota)
+        );
+
+        Console.WriteLine("Using:");
+        config.PrintConfig();
+        Console.WriteLine(nl);
+
+        var errors = config.Validate();
+        if (errors.Any())
+        {
+            Console.WriteLine($"Configuration errors: ({errors.Count})");
+            foreach ( var error in errors ) Console.WriteLine("\t" + error);
+            Console.WriteLine(nl);
+            argOrVar.PrintHelp();
+            return;
+        }
+
+
     }
 }