refactor: move run_interactive_command funcs to run_cmd

aider/run_cmd.py

@@ -0,0 +1,72 @@
+import os
+import subprocess
+import sys
+from io import BytesIO
+
+
+def run_cmd(command):
+    import sys
+
+    if not sys.stdin.isatty():
+        return run_cmd_subprocess(command)
+
+    try:
+        import pexpect  # noqa: F401
+    except ImportError:
+        return run_cmd_subprocess(command)
+
+    return run_cmd_pexpect(command)
+
+
+def run_cmd_subprocess(command):
+    try:
+        result = subprocess.run(
+            command,
+            stdout=subprocess.PIPE,
+            stderr=subprocess.STDOUT,
+            text=True,
+            shell=True,
+            encoding=sys.stdout.encoding,
+            errors="replace",
+        )
+        return result.returncode, result.stdout
+    except Exception as e:
+        return 1, str(e)
+
+
+def run_cmd_pexpect(command):
+    """
+    Run a shell command interactively using pexpect, capturing all output.
+
+    :param command: The command to run as a string.
+    :return: A tuple containing (exit_status, output)
+    """
+    import pexpect
+
+    output = BytesIO()
+
+    def output_callback(b):
+        output.write(b)
+        return b
+
+    try:
+        # Use the SHELL environment variable, falling back to /bin/sh if not set
+        shell = os.environ.get("SHELL", "/bin/sh")
+
+        if os.path.exists(shell):
+            # Use the shell from SHELL environment variable
+            child = pexpect.spawn(shell, args=["-c", command], encoding="utf-8")
+        else:
+            # Fall back to spawning the command directly
+            child = pexpect.spawn(command, encoding="utf-8")
+
+        # Transfer control to the user, capturing output
+        child.interact(output_filter=output_callback)
+
+        # Wait for the command to finish and get the exit status
+        child.close()
+        return child.exitstatus, output.getvalue().decode("utf-8", errors="replace")
+
+    except pexpect.ExceptionPexpect as e:
+        error_msg = f"Error running command: {e}"
+        return 1, error_msg