#!/usr/bin/env python

# We put a fake "pycryptopp-0.5.24.egg" package and a fake
# "pycryptopp-9.9.99.tar.gz" into a directory, but the latter is
# booby-trapped so it will raise an exception when you try to build
# it.

# Then we run "python setup.py test -s
# buildtest.test_with_fake_dist", which imports pycryptopp
# and passes if pycryptopp.__version__ == '0.5.24'.

# (If building succeeded -- meaning that you didn't try to build the
# booby-trapped 9.9.99 -- but pycryptopp.__version__ != '0.5.24' then
# that means a different version of pycryptopp was already installed
# so neither of the two fake pycryptopp packages were needed. In that
# case this test should be treated as a "skip" -- the functionality
# under test can't be exercised on the current system.)

# The goal is to turn red if the build system tries to build the
# source dist when it could have used the binary dist.

# (Note that for this test to make sense, tahoe-lafs needs to be
# asking for a version of pycryptopp which can be satisfied by either
# 0.5.24 or 0.5.25. At the time of this writing it requires >= 0.5.20
# on x86 and >= 0.5.14 on other architectures.)

import StringIO, glob, os, platform, shutil, subprocess, sys, tarfile, zipfile
import pkg_resources

fake_distdir = 'tahoe-deps'
fake_distname = "pycryptopp"
fake_sdistversion = "9.9.99"
fake_bdistversion = "0.5.24"
sdist_setup = "raise Exception('Aha I caught you trying to build me. I am a fake pycryptopp 9.9.99 sdist and you should be satisfied with a bdist.')"

testsuite = "buildtest.test_build_with_fake_dist"

dist_dirname = os.path.join(os.getcwd(), fake_distdir)

try:
    os.makedirs(dist_dirname)
except OSError:
    # probably already exists
    pass

bdist_egg_name = os.path.join(dist_dirname, '%s-%s-py%s.%s-%s.egg' % (fake_distname, fake_bdistversion, platform.python_version_tuple()[0], platform.python_version_tuple()[1], pkg_resources.get_supported_platform()))
try:
    bdist_egg = zipfile.ZipFile(bdist_egg_name, 'w')
    bdist_egg.writestr('pycryptopp/__init__.py', '__version__ = "%s"\n' % (fake_bdistversion,))
    bdist_egg.close()

    sdist_name = os.path.join(dist_dirname, '%s-%s.tar' % (fake_distname, fake_sdistversion))
    sdist = tarfile.open(sdist_name, 'w:gz')
    sdist.errorlevel =2
    tarinfo = tarfile.TarInfo('setup.py')
    tarinfo.errorlevel =2
    tarinfo.size = len(sdist_setup)
    sdist.addfile(tarinfo, StringIO.StringIO(sdist_setup))
    sdist.close()

    setuppy="setup.py"
    os.environ['PATH']=os.path.join(os.getcwd(), 'src')+os.pathsep+os.environ['PATH']
    eggs = [os.path.realpath(p) for p in glob.glob(os.path.join('..', '*.egg')) if not 'pycryptopp' in p]
    os.environ['PYTHONPATH']=os.pathsep+os.pathsep.join(eggs)+os.pathsep+os.environ.get('PYTHONPATH','')
    sys.exit(subprocess.call([sys.executable, setuppy, "-v", "test", "-s", testsuite], env=os.environ))
finally:
    os.remove(bdist_egg_name)
    os.remove(sdist_name)
    shutil.rmtree('support')
    [shutil.rmtree(p) for p in glob.glob('pycryptopp*.egg')]