#!/usr/bin/env python
"""
Build and run bumps.

Usage:

./run.py [bumps cli args]
"""

import os
import sys
from contextlib import contextmanager


def addpath(path):
    """
    Add a directory to the python path environment, and to the PYTHONPATH
    environment variable for subprocesses.
    """
    path = os.path.abspath(path)
    if "PYTHONPATH" in os.environ:
        PYTHONPATH = path + os.pathsep + os.environ["PYTHONPATH"]
    else:
        PYTHONPATH = path
    os.environ["PYTHONPATH"] = PYTHONPATH
    sys.path.insert(0, path)


@contextmanager
def cd(path):
    old_dir = os.getcwd()
    os.chdir(path)
    yield
    os.chdir(old_dir)


def prepare():
    # Make sure that we have a private version of mplconfig
    # mplconfig = os.path.join(os.getcwd(), '.mplconfig')
    # os.environ['MPLCONFIGDIR'] = mplconfig
    # if not os.path.exists(mplconfig):
    #    os.mkdir(mplconfig)

    # To avoid cluttering the source tree with .pyc or __pycache__ files, you
    # can suppress the bytecode generation when running in place. Unfortunately
    # this is a pretty big performance hit on Windows, so we are going to
    # suppress this behaviour and rely on .gitignore instead
    # sys.dont_write_bytecode = True

    # import numpy as np; np.seterr(all='raise')
    root = os.path.abspath(os.path.dirname(__file__))

    # Add the root to the system path
    addpath(root)

    # Make sample data and models available
    os.environ["BUMPS_DATA"] = os.path.join(root, "bumps", "gui", "resources")


if __name__ == "__main__":
    import multiprocessing

    multiprocessing.freeze_support()
    prepare()
    from bumps.cli import main

    main()
