setup.py

dirstate: skip step 3 in walk if nothing new will match

nothing will ever match on match.never
nothing new will match on match.exact (all found in step 1)
nothing new will match on match.match when
  there is no pattern and
  there is no direcory in pats

#!/usr/bin/env python
#
# This is the mercurial setup script.
#
# 'python setup.py install', or
# 'python setup.py --help' for more options

import sys
if not hasattr(sys, 'version_info') or sys.version_info < (2, 4, 0, 'final'):
    raise SystemExit("Mercurial requires Python 2.4 or later.")

# Solaris Python packaging brain damage
try:
    import hashlib
    sha = hashlib.sha1()
except:
    try:
        import sha
    except:
        raise SystemExit(
            "Couldn't import standard hashlib (incomplete Python install).")

try:
    import zlib
except:
    raise SystemExit(
        "Couldn't import standard zlib (incomplete Python install).")

import os, subprocess, time
import shutil
import tempfile
from distutils.core import setup, Extension
from distutils.dist import Distribution
from distutils.command.install_data import install_data
from distutils.command.build import build
from distutils.command.build_py import build_py
from distutils.spawn import spawn, find_executable
from distutils.ccompiler import new_compiler

extra = {}
scripts = ['hg']
if os.name == 'nt':
    scripts.append('contrib/win32/hg.bat')

# simplified version of distutils.ccompiler.CCompiler.has_function
# that actually removes its temporary files.
def has_function(cc, funcname):
    tmpdir = tempfile.mkdtemp(prefix='hg-install-')
    devnull = oldstderr = None
    try:
        try:
            fname = os.path.join(tmpdir, 'funcname.c')
            f = open(fname, 'w')
            f.write('int main(void) {\n')
            f.write('    %s();\n' % funcname)
            f.write('}\n')
            f.close()
            # Redirect stderr to /dev/null to hide any error messages
            # from the compiler.
            # This will have to be changed if we ever have to check
            # for a function on Windows.
            devnull = open('/dev/null', 'w')
            oldstderr = os.dup(sys.stderr.fileno())
            os.dup2(devnull.fileno(), sys.stderr.fileno())
            objects = cc.compile([fname])
            cc.link_executable(objects, os.path.join(tmpdir, "a.out"))
        except:
            return False
        return True
    finally:
        if oldstderr is not None:
            os.dup2(oldstderr, sys.stderr.fileno())
        if devnull is not None:
            devnull.close()
        shutil.rmtree(tmpdir)

# py2exe needs to be installed to work
try:
    import py2exe

    # Help py2exe to find win32com.shell
    try:
        import modulefinder
        import win32com
        for p in win32com.__path__[1:]: # Take the path to win32comext
            modulefinder.AddPackagePath("win32com", p)
        pn = "win32com.shell"
        __import__(pn)
        m = sys.modules[pn]
        for p in m.__path__[1:]:
            modulefinder.AddPackagePath(pn, p)
    except ImportError:
        pass

    extra['console'] = ['hg']

except ImportError:
    pass

version = None

if os.path.isdir('.hg'):
    # execute hg out of this directory with a custom environment which
    # includes the pure Python modules in mercurial/pure
    pypath = os.environ.get('PYTHONPATH', '')
    purepath = os.path.join('mercurial', 'pure')
    os.environ['PYTHONPATH'] = os.pathsep.join(['mercurial', purepath, pypath])
    os.environ['HGRCPATH'] = '' # do not read any config file
    cmd = [sys.executable, 'hg', 'id', '-i', '-t']

    l, e = subprocess.Popen(cmd, stdout=subprocess.PIPE,
                            stderr=subprocess.PIPE).communicate()
    os.environ['PYTHONPATH'] = pypath

    if e:
        sys.stderr.write('warning: could not establish Mercurial '
                         'version:\n%s\n' % e)
    else:
        l = l.split()
        while len(l) > 1 and l[-1][0].isalpha(): # remove non-numbered tags
            l.pop()
        if l:
            version = l[-1] # latest tag or revision number
            if version.endswith('+'):
                version += time.strftime('%Y%m%d')
elif os.path.exists('.hg_archival.txt'):
    hgarchival = open('.hg_archival.txt')
    for line in hgarchival:
        if line.startswith('node:'):
            version = line.split(':')[1].strip()[:12]
            break

if version:
    f = file("mercurial/__version__.py", "w")
    f.write('# this file is autogenerated by setup.py\n')
    f.write('version = "%s"\n' % version)
    f.close()


try:
    from mercurial import __version__
    version = __version__.version
except ImportError:
    version = 'unknown'

class install_package_data(install_data):
    def finalize_options(self):
        self.set_undefined_options('install',
                                   ('install_lib', 'install_dir'))
        install_data.finalize_options(self)

class build_mo(build):

    description = "build translations (.mo files)"

    def run(self):
        if not find_executable('msgfmt'):
            self.warn("could not find msgfmt executable, no translations "
                     "will be built")
            return

        podir = 'i18n'
        if not os.path.isdir(podir):
            self.warn("could not find %s/ directory" % podir)
            return

        join = os.path.join
        for po in os.listdir(podir):
            if not po.endswith('.po'):
                continue
            pofile = join(podir, po)
            modir = join('locale', po[:-3], 'LC_MESSAGES')
            mofile = join(modir, 'hg.mo')
            cmd = ['msgfmt', '-v', '-o', mofile, pofile]
            if sys.platform != 'sunos5':
                # msgfmt on Solaris does not know about -c
                cmd.append('-c')
            self.mkpath(modir)
            self.make_file([pofile], mofile, spawn, (cmd,))
            self.distribution.data_files.append((join('mercurial', modir),
                                                 [mofile]))

build.sub_commands.append(('build_mo', None))

Distribution.pure = 0
Distribution.global_options.append(('pure', None, "use pure (slow) Python "
                                    "code instead of C extensions"))

class hg_build_py(build_py):

    def finalize_options(self):
        build_py.finalize_options(self)

        if self.distribution.pure:
            if self.py_modules is None:
                self.py_modules = []
            for ext in self.distribution.ext_modules:
                if ext.name.startswith("mercurial."):
                    self.py_modules.append("mercurial.pure.%s" % ext.name[10:])
            self.distribution.ext_modules = []

    def find_modules(self):
        modules = build_py.find_modules(self)
        for module in modules:
            if module[0] == "mercurial.pure":
                if module[1] != "__init__":
                    yield ("mercurial", module[1], module[2])
            else:
                yield module

cmdclass = {'install_data': install_package_data,
            'build_mo': build_mo,
            'build_py': hg_build_py}

ext_modules=[
    Extension('mercurial.base85', ['mercurial/base85.c']),
    Extension('mercurial.bdiff', ['mercurial/bdiff.c']),
    Extension('mercurial.diffhelpers', ['mercurial/diffhelpers.c']),
    Extension('mercurial.mpatch', ['mercurial/mpatch.c']),
    Extension('mercurial.parsers', ['mercurial/parsers.c']),
    Extension('mercurial.osutil', ['mercurial/osutil.c']),
    ]

packages = ['mercurial', 'mercurial.hgweb', 'hgext', 'hgext.convert',
            'hgext.highlight', 'hgext.zeroconf', ]

if sys.platform == 'linux2' and os.uname()[2] > '2.6':
    # The inotify extension is only usable with Linux 2.6 kernels.
    # You also need a reasonably recent C library.
    cc = new_compiler()
    if has_function(cc, 'inotify_add_watch'):
        ext_modules.append(Extension('hgext.inotify.linux._inotify',
                                     ['hgext/inotify/linux/_inotify.c']))
        packages.extend(['hgext.inotify', 'hgext.inotify.linux'])

datafiles = []
for root in ('templates', 'i18n'):
    for dir, dirs, files in os.walk(root):
        datafiles.append((os.path.join('mercurial', dir),
                          [os.path.join(dir, file_) for file_ in files]))

setup(name='mercurial',
      version=version,
      author='Matt Mackall',
      author_email='[e-mail]',
      url='http://selenic.com/mercurial',
      description='Scalable distributed SCM',
      license='GNU GPL',
      scripts=scripts,
      packages=packages,
      ext_modules=ext_modules,
      data_files=datafiles,
      cmdclass=cmdclass,
      options=dict(py2exe=dict(packages=['hgext', 'email']),
                   bdist_mpkg=dict(zipdist=True,
                                   license='COPYING',
                                   readme='contrib/macosx/Readme.html',
                                   welcome='contrib/macosx/Welcome.html')),
      **extra)