Some python tests fail to find the 'xgboost' executable

[yurivict]

For example:

    def get_exe(self):
        if platform.system() == 'Windows':
            exe = 'xgboost.exe'
        else:
            exe = 'xgboost'
        exe = os.path.join(self.PROJECT_ROOT, exe)
>       assert os.path.exists(exe)
E       AssertionError: assert False
E        +  where False = <function exists at 0x16d42354f560>('/usr/ports/misc/py-xgboost/work-py311/xgboost-2.1.4/xgboost')
E        +    where <function exists at 0x16d42354f560> = <module 'posixpath' (frozen)>.exists
E        +      where <module 'posixpath' (frozen)> = os.path

The /usr/ports/misc/py-xgboost/work-py311/xgboost-2.1.4/xgboost file doesn't exist, and it doesn't appear to be built by the CMakeLists.txt script either.

Where is this executable supposed to come from?

[trivialfis]

Those are the tests for the deprecated CLI:

xgboost/CMakeLists.txt

Line 54 in 105aa42

option(BUILD_DEPRECATED_CLI "Build the deprecated command line interface" OFF)

I will make those tests optional.