misc/build_helpers/test-dont-install-newer-dep-when-you-already-have-sufficiently-new-one.py

   1 #!/usr/bin/env python
   2
   3 import StringIO, os, platform, shutil, subprocess, sys, tarfile, zipfile
   4 import pkg_resources
   5
   6 def test():
   7     # We put a "fakedependency-1.0.0.egg" package and a
   8     # "fakedependency-9.9.99.tar.gz" into a directory, but the latter is
   9     # booby-trapped so it will raise an exception when you try to build it.
  10     #
  11     # Then we run
  12     #
  13     #   python setup.py --fakedependency -v test -s buildtest.test_build_with_fake_dist
  14     #
  15     # which requires "fakedependency >= 1.0.0", imports fakedependency
  16     # and passes if fakedependency.__version__ == '1.0.0'.
  17     #
  18     # The goal is to turn red if the build system tries to build the
  19     # source dist when it could have used the binary dist.
  20     #
  21     # Note that for this test to make sense, Tahoe-LAFS needs to be asking
  22     # for a version of fakedependency which can be satisfied by 1.0.0.
  23     # The --fakedependency option to setup.py arranges that.
  24
  25     fake_distdir = 'tahoe-deps'
  26     fake_distname = "fakedependency"
  27     fake_sdistversion = "9.9.99"
  28     fake_bdistversion = "1.0.0"
  29     sdist_setup = "raise Exception('Aha I caught you trying to build me. I am a fakedependency 9.9.99 sdist and you should be satisfied with a bdist.')"
  30
  31     testsuite = "buildtest.test_build_with_fake_dist"
  32
  33     dist_dirname = os.path.join(os.getcwd(), fake_distdir)
  34
  35     try:
  36         os.makedirs(dist_dirname)
  37     except OSError:
  38         # probably already exists
  39         pass
  40
  41     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()))
  42     try:
  43         bdist_egg = zipfile.ZipFile(bdist_egg_name, 'w')
  44         bdist_egg.writestr('fakedependency/__init__.py', '__version__ = "%s"\n' % (fake_bdistversion,))
  45         bdist_egg.close()
  46
  47         sdist_name = os.path.join(dist_dirname, '%s-%s.tar' % (fake_distname, fake_sdistversion))
  48         sdist = tarfile.open(sdist_name, 'w:gz')
  49         sdist.errorlevel = 2
  50         tarinfo = tarfile.TarInfo('setup.py')
  51         tarinfo.errorlevel = 2
  52         tarinfo.size = len(sdist_setup)
  53         sdist.addfile(tarinfo, StringIO.StringIO(sdist_setup))
  54         sdist.close()
  55
  56         sys.exit(subprocess.call([sys.executable, "setup.py", "--fakedependency", "-v", "test", "-s", testsuite],
  57                                  env=os.environ))
  58     finally:
  59         os.remove(bdist_egg_name)
  60         os.remove(sdist_name)
  61         cleanup()
  62
  63 def cleanup():
  64     egg_info = os.path.join('src', 'allmydata_tahoe.egg-info')
  65     bin_tahoe = os.path.join('bin', 'tahoe')
  66     bin_tahoe_pyscript = os.path.join('bin', 'tahoe.pyscript')
  67
  68     if os.path.exists('build'):
  69         shutil.rmtree('build')
  70     if os.path.exists('support'):
  71         shutil.rmtree('support')
  72     if os.path.exists(egg_info):
  73         shutil.rmtree(egg_info)
  74     if os.path.exists(bin_tahoe):
  75         os.remove(bin_tahoe)
  76     if os.path.exists(bin_tahoe_pyscript):
  77         os.remove(bin_tahoe_pyscript)
  78
  79 if __name__ == '__main__':
  80     test()