#!/usr/bin/env python
# encoding: utf-8
"""
setup.py

Created by Thomas Mangin on 2011-01-24.
Copyright (c) 2009-2015 Exa Networks. All rights reserved.
"""

import os
import sys
import imp
import platform
from shutil import rmtree
from setuptools import setup
from distutils.util import get_platform

dryrun = False

version_template = """\
version = "%s"

# Do not change the first line as it is parsed by scripts

if __name__ == '__main__':
	import sys
	sys.stdout.write(version)
"""

debian_template = """\
exabgp (%s-0) unstable; urgency=low

  * Latest ExaBGP release.

 -- Vincent Bernat <bernat@debian.org>  %s

"""

if sys.argv[-1] == 'help':
	print """\
python setup.py help     this help
python setup.py cleanup  delete left-over file from release
python setup.py push     update the version, push to github
python setup.py release  tag a new version on github, and update pypi
python setup.py pypi     create egg/wheel
python setup.py debian   prepend the current version to debian/changelog
"""
	sys.exit(0)


def remove_egg ():
	if os.path.exists('lib/exabgp.egg-info'):
		print 'removing left-over egg'
		rmtree('lib/exabgp.egg-info')
	if os.path.exists('build/lib/exabgp'):
		print 'removing left-over egg'
		rmtree('build')

remove_egg()

if sys.argv[-1] == 'cleanup':
	sys.exit(0)

#
# Show python readme.rst
#

#
# Push a new version to github
#

if sys.argv[-1] == 'push':
	git_version = os.popen('git describe --tags').read().strip()

	with open('lib/exabgp/version.py','w') as version_file:
		version_file.write(version_template % git_version)

	version = imp.load_source('version','lib/exabgp/version.py').version

	if version != git_version:
		print 'version setting failed'
		sys.exit(1)

	commit = 'git ci -a -m "updating version to %s"' % git_version
	push = 'git push'

	ret = dryrun or os.system(commit)
	if ret:
		print 'failed to commit'
		sys.exit(ret)

	ret = dryrun or os.system(push)
	if ret:
		print 'failed to push'
		sys.exit(ret)

	sys.exit(0)

#
# update the debian changelog
#

def debian ():
	from email.utils import formatdate

	version = imp.load_source('version','lib/exabgp/version.py').version

	with open('debian/changelog', 'w') as w:
		w.write(debian_template % (version,formatdate()))

	print 'updated debian/changelog'

if sys.argv[-1] == 'debian':
	debian()
	sys.exit(0)

#
# Check that that there is no version inconsistancy before any pypi action
#

if sys.argv[-1] == 'release':
	print 'figuring valid next release version'

	tags = os.popen('git tag').read().split('-')[0].strip()
	versions = [[int(_) for _ in tag.split('.')]  for tag in tags.split('\n')
                    if tag.count('.') == 2 and tag[0].isdigit()]
	latest = sorted(versions)[-1]
	next = [
		'.'.join([str(_) for _ in (latest[0], latest[1], latest[2]+1)]),
		'.'.join([str(_) for _ in (latest[0], latest[1]+1, 0)]),
		'.'.join([str(_) for _ in (latest[0]+1, 0, 0)]),
	]

	print 'valid versions are:', ', '.join(next)
	print 'checking the CHANGELOG uses one of them'

	with open('CHANGELOG') as changelog:
		changelog.next()  # skip the word version on the first line
		for line in changelog:
			if 'version' in line.lower():
				version = line.split()[1]
				if version in next:
					break
				print 'invalid new version in CHANGELOG'
				sys.exit(1)

	print 'ok, next release is %s' % version
	print 'checking that this release is not already tagged'

	if version in tags.split('\n'):
		print 'this tag was already released'
		sys.exit(1)

	print 'ok, this is a new release'
	print 'rewriting lib/exabgp/version.py'

	with open('lib/exabgp/version.py','w') as version_file:
		version_file.write(version_template % version)

	debian()

	print 'checking if we need to commit a version.py change'

	commit = None
	status = os.popen('git status')
	for line in status.read().split('\n'):
		if 'modified:' in line:
			if 'lib/exabgp/version.py' in line or 'debian/changelog' in line:
				if commit is not False:
					commit = True
			else:
				commit = False
		elif 'renamed:' in line:
			commit = False

	if commit is True:
		command = "git commit -a -m 'updating version to %s'" % version
		print '\n>', command

		ret = dryrun or os.system(command)
		if ret:
			print 'return code is', ret
			print 'could not commit version change (%s)' % version
			sys.exit(1)
		print 'version.py was updated'
	elif commit is False:
		print 'more than one file is modified and need updating, aborting'
		sys.exit(1)
	else:  # None
		print 'version.py was already set'

	print 'tagging the new version'
	command = "git tag -a %s -m 'release %s'" % (version,version)
	print '\n>', command

	ret = dryrun or os.system(command)
	if ret:
		print 'return code is', ret
		print 'could not tag version (%s)' % version
		sys.exit(1)

	print 'pushing the new tag to local repo'
	command = "git push --tags"
	print '\n>', command

	ret = dryrun or os.system(command)
	if ret:
		print 'return code is', ret
		print 'could not push release version'
		sys.exit(1)

	print 'pushing the new tag to upstream'
	command = "git push --tags upstream"
	print '\n>', command

	ret = dryrun or os.system(command)
	if ret:
		print 'return code is', ret
		print 'could not push release version'
		sys.exit(1)
	sys.exit(0)

if sys.argv[-1] in ('pypi'):
	print
	print 'updating PyPI'

	command = "python setup.py sdist upload"
	print '\n>', command

	ret = dryrun or os.system(command)
	if ret:
		print 'return code is', ret
		print 'could not generate egg on pypi'
		sys.exit(1)

	remove_egg()

	command = "python setup.py bdist_wheel upload"
	print '\n>', command

	ret = dryrun or os.system(command)
	if ret:
		print 'return code is', ret
		print 'could not generate wheel on pypi'
		sys.exit(1)

	print 'all done.'
	sys.exit(0)


def packages (lib):
	def dirs (*path):
		for location,_,_ in os.walk(os.path.join(*path)):
			yield location

	def modules (lib):
		return os.walk(lib).next()[1]

	r = []
	for module in modules(lib):
		for d in dirs(lib,module):
			r.append(d.replace('/','.').replace('\\','.')[len(lib)+1:])
	return r

def configuration (etc):
	etcs = []
	for l,d,fs in os.walk(etc):
		if not d:
			for f in fs:
				etcs.append(os.path.join(l,f))
	return etcs

os_name = platform.system()

if os_name == 'NetBSD':
	files_definition= [
		('share/exabgp',configuration('etc/exabgp')),
	]
else:
	files_definition = [
		('etc/exabgp',configuration('etc/exabgp')),
	]
	if sys.argv[-1] == 'systemd':
		files_definition.append(('/usr/lib/systemd/system',configuration('etc/systemd')))

version = imp.load_source('version','lib/exabgp/version.py').version
try:
	description_rst = open('PYPI.rst').read() % {'version': version}
except IOError:
	description_rst = 'ExaBGP'

setup(name='exabgp',
	version=version,
	description='BGP swiss army knife',
	long_description=description_rst,
	author='Thomas Mangin',
	author_email='thomas.mangin@exa-networks.co.uk',
	url='https://github.com/Exa-Networks/exabgp',
	license="BSD",
	keywords = 'bgp routing api sdn flowspec',
	platforms=[get_platform(),],
	package_dir={'': 'lib'},
	packages=packages('lib'),
	package_data={'': ['PYPI.rst']},
#	scripts=['sbin/exabgp',],
	download_url='https://github.com/Exa-Networks/exabgp/archive/%s.tar.gz' % version,
	data_files=files_definition,
	install_requires=['setuptools'],
	classifiers=[
		'Development Status :: 5 - Production/Stable',
		'Environment :: Console',
		'Intended Audience :: System Administrators',
		'Intended Audience :: Telecommunications Industry',
		'License :: OSI Approved :: BSD License',
		'Operating System :: POSIX',
		'Operating System :: MacOS :: MacOS X',
		'Operating System :: Microsoft :: Windows',
		'Programming Language :: Python',
		'Topic :: Internet',
	],
	entry_points={
		'console_scripts': [
			'exabgp = exabgp.application:run_exabgp',
		],
	},
)