Move functions of mac crafter into different files

Signed-off-by: Claudio Cambra <claudio.cambra@nextcloud.com>

admin/osx/mac-crafter/Sources/Utils/Shell.swift

@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2024 by Claudio Cambra <claudio.cambra@nextcloud.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * for more details.
+ */
+
+import Foundation
+
+@discardableResult
+func run(
+    _ launchPath: String,
+    _ args: [String],
+    env: [String: String]? = nil,
+    quiet: Bool = false
+) -> Int32 {
+    let task = Process()
+    task.launchPath = launchPath
+    task.arguments = args
+
+    if let env,
+       let combinedEnv = task.environment?.merging(env, uniquingKeysWith: { (_, new) in new })
+    {
+        task.environment = combinedEnv
+    }
+
+    if quiet {
+        task.standardOutput = nil
+        task.standardError = nil
+    }
+
+    task.launch()
+    task.waitUntilExit()
+    return task.terminationStatus
+}
+
+func run(
+    _ launchPath: String,
+    _ args: String...,
+    env: [String: String]? = nil,
+    quiet: Bool = false
+) -> Int32 {
+    return run(launchPath, args, env: env, quiet: quiet)
+}
+
+@discardableResult
+func shell(_ commands: String..., env: [String: String]? = nil, quiet: Bool = false) -> Int32 {
+    return run("/bin/zsh", ["-c"] + commands, env: env, quiet: quiet)
+}
+
+func commandExists(_ command: String) -> Bool {
+    return run("/usr/bin/type", command, quiet: true) == 0
+}