feat: Begins using swift argument parser and creating cli client dependency

Sources/DewPointController/RunCommand.swift

@@ -0,0 +1,86 @@
+import ArgumentParser
+import CliClient
+import Dependencies
+import Foundation
+import Logging
+import Models
+import MQTTConnectionService
+import MQTTManager
+import MQTTNIO
+import NIO
+import PsychrometricClientLive
+import SensorsService
+import ServiceLifecycle
+
+extension Application {
+  /// Run the controller.
+  ///
+  struct Run: AsyncParsableCommand {
+
+    static let configuration = CommandConfiguration(
+      commandName: "run",
+      abstract: "Run the controller."
+    )
+
+    @OptionGroup
+    var shared: SharedOptions
+
+    mutating func run() async throws {
+      @Dependency(\.cliClient) var cliClient
+
+      let eventloopGroup = MultiThreadedEventLoopGroup(numberOfThreads: 1)
+      var logger = Logger(label: "dewpoint-controller")
+      let mqtt = try await setup(eventLoopGroup: eventloopGroup, logger: &logger)
+
+      do {
+        try await withDependencies {
+          $0.psychrometricClient = .liveValue
+          $0.mqtt = .live(client: mqtt, logger: logger)
+        } operation: {
+          let mqttConnection = MQTTConnectionService(logger: logger)
+          let sensors = SensorsService(sensors: .live, logger: logger)
+
+          var serviceGroupConfiguration = ServiceGroupConfiguration(
+            services: [
+              mqttConnection,
+              sensors
+            ],
+            gracefulShutdownSignals: [.sigterm, .sigint],
+            logger: logger
+          )
+          serviceGroupConfiguration.maximumCancellationDuration = .seconds(5)
+          serviceGroupConfiguration.maximumGracefulShutdownDuration = .seconds(10)
+
+          let serviceGroup = ServiceGroup(configuration: serviceGroupConfiguration)
+
+          logger.info("Starting dewpoint-controller!")
+          try await serviceGroup.run()
+        }
+
+        try await mqtt.shutdown()
+        try await eventloopGroup.shutdownGracefully()
+      } catch {
+        try await eventloopGroup.shutdownGracefully()
+      }
+    }
+
+    private func setup(
+      eventLoopGroup: MultiThreadedEventLoopGroup,
+      logger: inout Logger
+    ) async throws -> MQTTClient {
+      @Dependency(\.cliClient) var cliClient
+
+      let environment = try await cliClient.makeEnvVars(shared.envVarsRequest(logger: logger))
+      logger.logLevel = cliClient.logLevel(environment)
+
+      return try cliClient.makeClient(.init(
+        envVars: environment,
+        eventLoopGroup: eventLoopGroup,
+        logger: logger
+      ))
+    }
+  }
+
+}
+
+// MARK: - Helpers