Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.8/site-packages/graphviz/backend/viewing.py: 53%

1"""Open files in platform-specific default viewing application.""" 

2 

3import logging 

4import os 

5import platform 

6import subprocess 

7import typing 

8 

9from .. import _tools 

10 

11__all__ = ['view'] 

12 

13PLATFORM = platform.system().lower() 

14 

15 

16log = logging.getLogger(__name__) 

17 

18 

19@_tools.deprecate_positional_args(supported_number=1) 

20def view(filepath: typing.Union[os.PathLike, str], 

21 quiet: bool = False) -> None: 

22 """Open filepath with its default viewing application (platform-specific). 

23 

24 Args: 

25 filepath: Path to the file to open in viewer. 

26 quiet: Suppress ``stderr`` output 

27 from the viewer process (ineffective on Windows). 

28 

29 Raises: 

30 RuntimeError: If the current platform is not supported. 

31 

32 Note: 

33 There is no option to wait for the application to close, 

34 and no way to retrieve the application's exit status. 

35 """ 

36 try: 

37 view_func = getattr(view, PLATFORM) 

38 except AttributeError: 

39 raise RuntimeError(f'platform {PLATFORM!r} not supported') 

40 view_func(filepath, quiet=quiet) 

41 

42 

43@_tools.attach(view, 'darwin') 

44def view_darwin(filepath: typing.Union[os.PathLike, str], *, 

45 quiet: bool) -> None: 

46 """Open filepath with its default application (mac).""" 

47 cmd = ['open', filepath] 

48 log.debug('view: %r', cmd) 

49 kwargs = {'stderr': subprocess.DEVNULL} if quiet else {} 

50 subprocess.Popen(cmd, **kwargs) 

51 

52 

53@_tools.attach(view, 'linux') 

54@_tools.attach(view, 'freebsd') 

55def view_unixoid(filepath: typing.Union[os.PathLike, str], *, 

56 quiet: bool) -> None: 

57 """Open filepath in the user's preferred application (linux, freebsd).""" 

58 cmd = ['xdg-open', filepath] 

59 log.debug('view: %r', cmd) 

60 kwargs = {'stderr': subprocess.DEVNULL} if quiet else {} 

61 subprocess.Popen(cmd, **kwargs) 

62 

63 

64@_tools.attach(view, 'windows') 

65def view_windows(filepath: typing.Union[os.PathLike, str], *, 

66 quiet: bool) -> None: 

67 """Start filepath with its associated application (windows).""" 

68 # TODO: implement quiet=True 

69 filepath = os.path.normpath(filepath) 

70 log.debug('view: %r', filepath) 

71 os.startfile(filepath) # pytype: disable=module-attr