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.venv/lib/python3.12/site-packages/mpremote/repl.py

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+from .console import Console, ConsolePosix
+
+from .transport import TransportError
+
+
+def do_repl_main_loop(
+    state, console_in, console_out_write, *, escape_non_printable, code_to_inject, file_to_inject
+):
+    while True:
+        try:
+            console_in.waitchar(state.transport.serial)
+            c = console_in.readchar()
+            if c:
+                if c in (b"\x1d", b"\x18"):  # ctrl-] or ctrl-x, quit
+                    break
+                elif c == b"\x04":  # ctrl-D
+                    # special handling needed for ctrl-D if filesystem is mounted
+                    state.transport.write_ctrl_d(console_out_write)
+                elif c == b"\x0a" and code_to_inject is not None:  # ctrl-j, inject code
+                    state.transport.serial.write(code_to_inject)
+                elif c == b"\x0b" and file_to_inject is not None:  # ctrl-k, inject script
+                    console_out_write(bytes("Injecting %s\r\n" % file_to_inject, "utf8"))
+                    state.transport.enter_raw_repl(soft_reset=False)
+                    with open(file_to_inject, "rb") as f:
+                        pyfile = f.read()
+                    try:
+                        state.transport.exec_raw_no_follow(pyfile)
+                    except TransportError as er:
+                        console_out_write(b"Error:\r\n")
+                        console_out_write(er)
+                    state.transport.exit_raw_repl()
+                else:
+                    state.transport.serial.write(c)
+
+            n = state.transport.serial.inWaiting()
+            if n > 0:
+                dev_data_in = state.transport.serial.read(n)
+                if dev_data_in is not None:
+                    if escape_non_printable:
+                        # Pass data through to the console, with escaping of non-printables.
+                        console_data_out = bytearray()
+                        for c in dev_data_in:
+                            if c in (8, 9, 10, 13, 27) or 32 <= c <= 126:
+                                console_data_out.append(c)
+                            else:
+                                console_data_out.extend(b"[%02x]" % c)
+                    else:
+                        console_data_out = dev_data_in
+                    console_out_write(console_data_out)
+
+        except OSError as er:
+            if _is_disconnect_exception(er):
+                return True
+            else:
+                raise
+    return False
+
+
+def do_repl(state, args):
+    state.ensure_friendly_repl()
+    state.did_action()
+
+    escape_non_printable = args.escape_non_printable
+    capture_file = args.capture
+    code_to_inject = args.inject_code
+    file_to_inject = args.inject_file
+
+    print("Connected to MicroPython at %s" % state.transport.device_name)
+    print("Use Ctrl-] or Ctrl-x to exit this shell")
+    if escape_non_printable:
+        print("Escaping non-printable bytes/characters by printing their hex code")
+    if capture_file is not None:
+        print('Capturing session to file "%s"' % capture_file)
+        capture_file = open(capture_file, "wb")
+    if code_to_inject is not None:
+        code_to_inject = bytes(code_to_inject.replace("\\n", "\r\n"), "utf8")
+        print("Use Ctrl-J to inject", code_to_inject)
+    if file_to_inject is not None:
+        print('Use Ctrl-K to inject file "%s"' % file_to_inject)
+
+    console = Console()
+    console.enter()
+
+    def console_out_write(b):
+        console.write(b)
+        if capture_file is not None:
+            capture_file.write(b)
+            capture_file.flush()
+
+    try:
+        return do_repl_main_loop(
+            state,
+            console,
+            console_out_write,
+            escape_non_printable=escape_non_printable,
+            code_to_inject=code_to_inject,
+            file_to_inject=file_to_inject,
+        )
+    finally:
+        console.exit()
+        if capture_file is not None:
+            capture_file.close()
+
+
+def _is_disconnect_exception(exception):
+    """
+    Check if an exception indicates device disconnect.
+
+    Returns True if the exception indicates the device has disconnected,
+    False otherwise.
+    """
+    if isinstance(exception, OSError):
+        if hasattr(exception, "args") and len(exception.args) > 0:
+            # IO error, device disappeared
+            if exception.args[0] == 5:
+                return True
+        # Check for common disconnect messages in the exception string
+        exception_str = str(exception)
+        disconnect_indicators = ["Write timeout", "Device disconnected", "ClearCommError failed"]
+        return any(indicator in exception_str for indicator in disconnect_indicators)
+    return False