Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.8/site-packages/prompt_toolkit/input/defaults.py: 26%

1from __future__ import annotations 

2 

3import io 

4import sys 

5from typing import ContextManager, TextIO 

6 

7from .base import DummyInput, Input, PipeInput 

8 

9__all__ = [ 

10 "create_input", 

11 "create_pipe_input", 

12] 

13 

14 

15def create_input(stdin: TextIO | None = None, always_prefer_tty: bool = False) -> Input: 

16 """ 

17 Create the appropriate `Input` object for the current os/environment. 

18 

19 :param always_prefer_tty: When set, if `sys.stdin` is connected to a Unix 

20 `pipe`, check whether `sys.stdout` or `sys.stderr` are connected to a 

21 pseudo terminal. If so, open the tty for reading instead of reading for 

22 `sys.stdin`. (We can open `stdout` or `stderr` for reading, this is how 

23 a `$PAGER` works.) 

24 """ 

25 if sys.platform == "win32": 

26 from .win32 import Win32Input 

27 

28 # If `stdin` was assigned `None` (which happens with pythonw.exe), use 

29 # a `DummyInput`. This triggers `EOFError` in the application code. 

30 if stdin is None and sys.stdin is None: 

31 return DummyInput() 

32 

33 return Win32Input(stdin or sys.stdin) 

34 else: 

35 from .vt100 import Vt100Input 

36 

37 # If no input TextIO is given, use stdin/stdout. 

38 if stdin is None: 

39 stdin = sys.stdin 

40 

41 if always_prefer_tty: 

42 for obj in [sys.stdin, sys.stdout, sys.stderr]: 

43 if obj.isatty(): 

44 stdin = obj 

45 break 

46 

47 # If we can't access the file descriptor for the selected stdin, return 

48 # a `DummyInput` instead. This can happen for instance in unit tests, 

49 # when `sys.stdin` is patched by something that's not an actual file. 

50 # (Instantiating `Vt100Input` would fail in this case.) 

51 try: 

52 stdin.fileno() 

53 except io.UnsupportedOperation: 

54 return DummyInput() 

55 

56 return Vt100Input(stdin) 

57 

58 

59def create_pipe_input() -> ContextManager[PipeInput]: 

60 """ 

61 Create an input pipe. 

62 This is mostly useful for unit testing. 

63 

64 Usage:: 

65 

66 with create_pipe_input() as input: 

67 input.send_text('inputdata') 

68 

69 Breaking change: In prompt_toolkit 3.0.28 and earlier, this was returning 

70 the `PipeInput` directly, rather than through a context manager. 

71 """ 

72 if sys.platform == "win32": 

73 from .win32_pipe import Win32PipeInput 

74 

75 return Win32PipeInput.create() 

76 else: 

77 from .posix_pipe import PosixPipeInput 

78 

79 return PosixPipeInput.create()