#!/usr/bin/env python3
#
#  Copyright (C) 2016 Codethink Limited
#
#  This program is free software; you can redistribute it and/or
#  modify it under the terms of the GNU Lesser General Public
#  License as published by the Free Software Foundation; either
#  version 2 of the License, or (at your option) any later version.
#
#  This library is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU
#  Lesser General Public License for more details.
#
#  You should have received a copy of the GNU Lesser General Public
#  License along with this library. If not, see <http://www.gnu.org/licenses/>.
#
#  Authors:
#        Tristan Van Berkom <tristan.vanberkom@codethink.co.uk>

import os
import shutil
import sys

if sys.version_info[0] != 3 or sys.version_info[1] < 4:
    print("BuildStream requires Python >= 3.4")
    sys.exit(1)

bwrap_path = shutil.which('bwrap')
if not bwrap_path:
    print("Bubblewrap not found: BuildStream requires Bubblewrap (bwrap) for"
          " sandboxing the build environment. Install it using your package manager"
          " (usually bwrap or bubblewrap)")
    sys.exit(1)

try:
    from setuptools import setup, find_packages
except ImportError:
    print("BuildStream requires setuptools in order to build. Install it using"
          " your package manager (usually python3-setuptools) or via pip (pip3"
          " install setuptools).")
    sys.exit(1)


##################################################################
# OSTree version requirements
##################################################################
REQUIRED_OSTREE_YEAR = 2017
REQUIRED_OSTREE_RELEASE = 8


def exit_ostree(reason):
    print(reason +
          "\nBuildStream requires OSTree >= v{}.{} with Python bindings. "
          .format(REQUIRED_OSTREE_YEAR, REQUIRED_OSTREE_RELEASE) +
          "Install it using your package manager (usually ostree or gir1.2-ostree-1.0).")
    sys.exit(1)

try:
    import gi
except ImportError:
    print("BuildStream requires PyGObject (aka PyGI). Install it using"
          " your package manager (usually pygobject3 or python-gi).")
    sys.exit(1)

try:
    gi.require_version('OSTree', '1.0')
    from gi.repository import OSTree
except:
    exit_ostree("OSTree not found")

try:
    if OSTree.YEAR_VERSION < REQUIRED_OSTREE_YEAR or \
       (OSTree.YEAR_VERSION == REQUIRED_OSTREE_YEAR and
        OSTree.RELEASE_VERSION < REQUIRED_OSTREE_RELEASE):
        exit_ostree("OSTree v{}.{} is too old."
                    .format(OSTree.YEAR_VERSION, OSTree.RELEASE_VERSION))
except AttributeError:
    exit_ostree("OSTree is too old.")


###########################################
# List the pre-built man pages to install #
###########################################
#
# Man pages are automatically generated however it was too difficult
# to integrate with setuptools as a step of the build (FIXME !).
#
# To update the man pages in tree before a release, you need to
# ensure you have the 'click_man' package installed, and run:
#
# python3 setup.py --command-packages=click_man.commands man_pages
#
# Then commit the result.
#
def list_man_pages():
    bst_dir = os.path.dirname(os.path.abspath(__file__))
    man_dir = os.path.join(bst_dir, 'man')
    man_pages = os.listdir(man_dir)
    return [os.path.join('man', page) for page in man_pages]


setup(name='BuildStream',
      version='0.1',
      description='A framework for modelling build pipelines in YAML',
      license='LGPL',
      use_scm_version=True,
      packages=find_packages(),
      package_data={'buildstream': ['plugins/*/*.py', 'plugins/*/*.yaml',
                                    'data/*.yaml', 'data/*.sh.in']},
      data_files=[
          # This is a weak attempt to integrate with the user nicely,
          # installing things outside of the python package itself with pip is
          # not recommended, but there seems to be no standard structure for
          # addressing this; so just installing this here.
          #
          # These do not get installed in developer mode (`pip install --user -e .`)
          #
          # The completions are ignored by bash unless it happens to be installed
          # in the right directory; this is more like a weak statement that we
          # attempt to install bash completion scriptlet.
          #
          ('share/man/man1', list_man_pages()),
          ('share/bash-completion/completions', [
              os.path.join('buildstream', 'data', 'bst')
          ])
      ],
      install_requires=[
          'setuptools',
          'psutil',
          'ruamel.yaml',
          'pluginbase',
          'Click',
          'blessings'
      ],
      entry_points='''
      [console_scripts]
      bst=buildstream._frontend:cli
      bst-artifact-receive=buildstream._artifactcache.pushreceive:receive_main
      ''',
      setup_requires=['pytest-runner', 'setuptools_scm'],
      tests_require=['pep8',
                     'coverage',
                     'pytest-datafiles',
                     'pytest-env',
                     'pytest-pep8',
                     'pytest-cov',
                     'pytest >= 3.1.0'],
      zip_safe=False)