🆕 Add basic config lookup logic

.vscode/launch.json

@@ -0,0 +1,52 @@
+{
+  "configurations": [
+    {
+      "type": "lldb",
+      "request": "launch",
+      "sourceLanguages": [
+        "swift"
+      ],
+      "args": [],
+      "cwd": "${workspaceFolder:ffmpeg-over-ip-swift}",
+      "name": "Debug server",
+      "program": "${workspaceFolder:ffmpeg-over-ip-swift}/.build/debug/server",
+      "preLaunchTask": "swift: Build Debug server"
+    },
+    {
+      "type": "lldb",
+      "request": "launch",
+      "sourceLanguages": [
+        "swift"
+      ],
+      "args": [],
+      "cwd": "${workspaceFolder:ffmpeg-over-ip-swift}",
+      "name": "Release server",
+      "program": "${workspaceFolder:ffmpeg-over-ip-swift}/.build/release/server",
+      "preLaunchTask": "swift: Build Release server"
+    },
+    {
+      "type": "lldb",
+      "request": "launch",
+      "sourceLanguages": [
+        "swift"
+      ],
+      "args": [],
+      "cwd": "${workspaceFolder:ffmpeg-over-ip-swift}",
+      "name": "Debug client",
+      "program": "${workspaceFolder:ffmpeg-over-ip-swift}/.build/debug/client",
+      "preLaunchTask": "swift: Build Debug client"
+    },
+    {
+      "type": "lldb",
+      "request": "launch",
+      "sourceLanguages": [
+        "swift"
+      ],
+      "args": [],
+      "cwd": "${workspaceFolder:ffmpeg-over-ip-swift}",
+      "name": "Release client",
+      "program": "${workspaceFolder:ffmpeg-over-ip-swift}/.build/release/client",
+      "preLaunchTask": "swift: Build Release client"
+    }
+  ]
+}

Sources/client/common

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+../common

Sources/common/config.swift

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+import Foundation
+
+enum Runtime {
+  case Server
+  case Client
+}
+
+let configServerLong: String = "ffmpeg-over-ip.server.json"
+let configServerShort: String = "config.server.json"
+
+let configClientLong: String = "ffmpeg-over-ip.client.json"
+let configClientShort: String = "config.client.json"
+
+func getConfigPaths(runtime: Runtime) -> [String] {
+  let configLong = runtime == .Server ? configServerLong : configClientLong
+  let configShort = runtime == .Server ? configServerShort : configClientShort
+
+  let currentDirectory: String = FileManager.default.currentDirectoryPath
+  let userDirectory: String = FileManager.default.homeDirectoryForCurrentUser.path
+
+  var paths: [(directory: String, file: String)] = [
+    (directory: currentDirectory, file: configLong),
+  ]
+
+  if userDirectory != "" {
+    let userConfigDirectory: String = NSString.path(withComponents: [userDirectory, ".config"])
+    let userScopedConfigDirectory: String = NSString.path(withComponents: [userConfigDirectory, "ffmpeg-over-ip"])
+
+    paths.append((directory: userScopedConfigDirectory, file: configShort))
+    paths.append((directory: userConfigDirectory, file: configLong))
+  }
+
+  paths.append((directory: "/etc/ffmpeg-over-ip", file: configShort))
+  paths.append((directory: "/etc", file: configLong))
+
+  // Collapse the paths into a single array
+  let filePaths: [String] = paths.map { (directory: String, file: String) -> String in
+    NSString.path(withComponents: [directory, file])
+  }
+
+  return filePaths
+}
+
+func getConfig(filePaths: [String]) -> String? {
+  var configPath: String? = nil
+  // Find the first file that exists from the paths
+  for filePath in filePaths {
+    if FileManager.default.fileExists(atPath: filePath) {
+      configPath = filePath
+      break
+    }
+  }
+  if configPath == nil {
+    return nil
+  }
+
+  print(filePaths)
+
+  return configPath
+}

Sources/common/help.swift

@@ -0,0 +1,29 @@
+let HELP_SERVER_VERSION: String = "ffmpeg-over-ip server 3.0.0"
+let HELP_CLIENT_VERSION: String = "ffmpeg-over-ip client 3.0.0"
+
+let HELP_TEXT_CLIENT: String = """
+\(HELP_CLIENT_VERSION)
+Usage: ffmpeg-over-ip-client [options]
+       ffmpeg-over-ip-client <...ffmpeg options>
+
+Options:
+  --debug-help          Show this help message and exit
+  --debug-version       Show version number and exit
+  --debug-print-config  Print the configuration of the client
+  --debug-print-config-paths
+                        Print the paths of the configuration files
+"""
+
+let HELP_TEXT_SERVER: String = """
+\(HELP_SERVER_VERSION)
+Usage: ffmpeg-over-ip-server [options]
+
+Options:
+  -h, --help, --debug-help
+                        Show this help message and exit
+  -v, --version, --debug-version
+                        Show version number and exit
+  --debug-print-config  Print the configuration of the client
+  --debug-print-config-paths
+                        Print the paths of the configuration files
+"""

Sources/server/common

@@ -0,0 +1 @@
+../common

Sources/server/main.swift

@@ -1,4 +1,37 @@
-// The Swift Programming Language
-// https://docs.swift.org/swift-book
 
-print("Hello, world from server!")
+func main() throws -> Void {
+  if CommandLine.arguments.contains("-h") || CommandLine.arguments.contains("--help") || CommandLine.arguments.contains("--debug-help") {
+    print(HELP_TEXT_SERVER)
+    return
+  }
+  if CommandLine.arguments.contains("-v") || CommandLine.arguments.contains("--version") || CommandLine.arguments.contains("--debug-version") {
+    print(HELP_SERVER_VERSION)
+    return
+  }
+
+  let configPaths: [String] = getConfigPaths(runtime: .Server)
+
+  if CommandLine.arguments.contains("--debug-print-config-paths") {
+    print("Config lookup paths: ")
+    for configPath in configPaths {
+      print("  \(configPath)")
+    }
+    exit(1)
+  }
+
+  let config = getConfig(filePaths: configPaths)
+
+  if config == nil {
+    print("No config file found. Try running with --debug-print-config-paths to print search paths")
+    exit(1)
+  }
+}
+
+
+// call main and try/catch it and log the error
+do {
+    try main()
+} catch {
+    print("Error: \(error)")
+    exit(1)
+}