---

# The following code is an attempt at getting MathWorks' official "MATLAB Engine
# API for Python" to work, instead of the `pymatbridge` Python package (which is
# still labeled as status "3 - Alpha" on PyPI).
#
# Unfortunately, as of MATLAB 2016a, the MATLAB Engine API only supports Python
# 2.7, 3.3, and 3.4. Since the provided Python module is a *binary* one
# (`libmatlabforpython3_4.so`), we cannot play any diff/patch/symlink tricks.
#
# So here you go, code that only works for Python 2 and little chances of
# ever working with the *current* Python 3.

- name: Is the MATLAB Engine API for Python already installed?
  command: |
    {{PYTHON2_EXE}} -c "import matlab"
  ignore_errors: yes
  register: matlab_for_python_available


- name: Find MATLAB root directory
  shell: |
    {{MATLAB_EXE}} -nojvm -nodesktop -nodisplay -nosplash -r "dir = matlabroot; fprintf('MATLABROOT=%s\n', dir); exit" | grep "^MATLABROOT=" | cut -d= -f2
  register: matlabroot
  when: (matlab_for_python_available is failed)


- name: Install MATLAB engine for Python
  command: |
    {{PYTHON2_EXE}} setup.py install
  args:
    chdir: '{{matlabroot.stdout}}/extern/engines/python/'
  when: (matlab_for_python_available is failed)


- name: Install Jupyter/IPython kernel for MATLAB (module)
  pip:
    name: '{{item}}'
    state: '{{ pkg_install_state }}'
    executable: '{{PYTHON2_EXE|dirname}}/pip'
  loop:
    - matlab_kernel


- name: Install Jupyter/IPython kernel for MATLAB (kernel spec)
  command:
    'env PATH={{PYTHON2_EXE|dirname}}:$PATH {{PYTHON2_EXE}} -m matlab_kernel install'