def executable(cls):
if cls._executable is None:
cls._executable = Shell.find_executable('csh')
return cls._executable
def executable(cls):
if cls._executable is None:
cls._executable = Shell.find_executable('tcsh')
return cls._executable
def executable(cls):
if cls._executable is None:
cls._executable = Shell.find_executable('powershell')
return cls._executable
def executable(cls):
return Shell.find_executable('sh')
