Function binary_is_usable

pythonforandroid/pythonpackage.py:144–167

Helper function to see if a given binary name refers to a usable python interpreter binary

(python_bin)

    def python_binary_from_folder(path):
        def binary_is_usable(python_bin):
            """ Helper function to see if a given binary name refers
                to a usable python interpreter binary
            """

            # Abort if path isn't present at all or a directory:
            if not os.path.exists(
                os.path.join(path, python_bin)
            ) or os.path.isdir(os.path.join(path, python_bin)):
                return
            # We should check file not found anyway trying to run it,
            # since it might be a dead symlink:
            try:
                filenotfounderror = FileNotFoundError
            except NameError:  # Python 2
                filenotfounderror = OSError
            try:
                # Run it and see if version output works with no error:
                subprocess.check_output([
                    os.path.join(path, python_bin), "--version"
                ], stderr=subprocess.STDOUT)
                return True
            except (subprocess.CalledProcessError, filenotfounderror):
                return False

        python_name = "python" + sys.version
        while (not binary_is_usable(python_name) and