Added proc_run() and system() for processes and added to stdlib as class. (0.16.6)

lib/io/process.fun

@@ -0,0 +1,47 @@
+/*
+ * This file is part of the Fun programming language.
+ * https://hanez.org/project/fun/
+ *
+ * Copyright 2025 Johannes Findeisen
+ * Licensed under the terms of the Apache-2.0 license.
+ * https://opensource.org/license/apache-2-0
+ *
+ * Added: 2025-10-02
+ */
+
+/*
+ * Process utilities built on proc_run() and system().
+ *
+ * Methods:
+ *   run(cmd) -> map { "out": string, "code": number }
+ *   run_merge_stderr(cmd) -> same, but merges stderr into stdout (" 2>&1")
+ *   system(cmd) -> exit code number
+ *   check_call(cmd) -> 1 if exit code==0 else 0
+ */
+
+class Process()
+  // Execute command and capture stdout and exit code
+  fun run(this, cmd)
+    return proc_run(to_string(cmd))
+
+  // Merge stderr into stdout using shell redirection
+  fun run_merge_stderr(this, cmd)
+    c = to_string(cmd)
+    // Add a single space if needed
+    if (len(c) > 0) && (substr(c, len(c) - 1, 1) != " ")
+      c = join([c, " 2>&1"], "")
+    else
+      c = join([c, "2>&1"], "")
+    return proc_run(c)
+
+  // Return the exit code of the command
+  fun system(this, cmd)
+    return system(to_string(cmd))
+
+  // Return 1 if command succeeds (exit code 0), else 0
+  fun check_call(this, cmd)
+    code = system(to_string(cmd))
+    if (code == 0)
+      return 1
+    else
+      return 0