comparison setup.py @ 43076:2372284d9457

formatting: blacken the codebase

This is using my patch to black
(https://github.com/psf/black/pull/826) so we don't un-wrap collection
literals.

Done with:

  hg files 'set:**.py - mercurial/thirdparty/** - "contrib/python-zstandard/**"' | xargs black -S

# skip-blame mass-reformatting only

# no-check-commit reformats foo_bar functions

Differential Revision: https://phab.mercurial-scm.org/D6971

43075:57875cf423c9

    # codecs.escape_encode() where it raises SystemError on empty bytestring
    # bug link: https://bugs.python.org/issue25270
    #
    # TODO: when we actually work on Python 3, use this string as the
    # actual supportedpy string.
    supportedpy = ','.join([
        '>=2.7',
        '!=3.0.*',
        '!=3.1.*',
        '!=3.2.*',
        '!=3.3.*',
        '!=3.4.*',
        '!=3.5.0',
        '!=3.5.1',
        '!=3.5.2',
        '!=3.6.0',
        '!=3.6.1',
    ])

import sys, platform
import sysconfig
if sys.version_info[0] >= 3:
    printf = eval('print')
    libdir_escape = 'unicode_escape'
    def sysstr(s):
        return s.decode('latin-1')
else:
    libdir_escape = 'string_escape'
    def printf(*args, **kwargs):
        f = kwargs.get('file', sys.stdout)
        end = kwargs.get('end', '\n')
        f.write(b' '.join(args) + end)
    def sysstr(s):
        return s

# Attempt to guide users to a modern pip - this means that 2.6 users
# should have a chance of getting a 4.2 release, and when we ratchet
# the version requirement forward again hopefully everyone will get
# something that works for them.
if sys.version_info < (2, 7, 0, 'final'):
    pip_message = ('This may be due to an out of date pip. '
                   'Make sure you have pip >= 9.0.1.')
    try:
        import pip
        pip_version = tuple([int(x) for x in pip.__version__.split('.')[:3]])
        if pip_version < (9, 0, 1) :
            pip_message = (
                'Your pip version is out of date, please install '
                'pip >= 9.0.1. pip {} detected.'.format(pip.__version__))
        else:
            # pip is new enough - it must be something else
            pip_message = ''
    except Exception:
        pass
    error = """
Mercurial does not support Python older than 2.7.
Python {py} detected.
{pip}
""".format(py=sys.version_info, pip=pip_message)
    printf(error, file=sys.stderr)
    sys.exit(1)

# We don't yet officially support Python 3. But we want to allow developers to
# hack on. Detect and disallow running on Python 3 by default. But provide a

this command. No special environment variables or configuration changes are
necessary to run `hg` with Python 3.

See https://www.mercurial-scm.org/wiki/Python3 for more on Mercurial's
Python 3 support.
""".format(py='.'.join('%d' % x for x in sys.version_info[0:2]))

        printf(error, file=sys.stderr)
        sys.exit(1)

if sys.version_info[0] >= 3:

    DYLIB_SUFFIX = sysconfig.get_config_vars()['SO']

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

try:
    import zlib
    zlib.compressobj # silence unused import warning
except ImportError:
    raise SystemExit(
        "Couldn't import standard zlib (incomplete Python install).")

# The base IronPython distribution (as of 2.7.1) doesn't support bz2
isironpython = False
try:
    isironpython = (platform.python_implementation()
                    .lower().find("ironpython") != -1)
except AttributeError:
    pass

if isironpython:
    sys.stderr.write("warning: IronPython detected (no bz2 support)\n")
else:
    try:
        import bz2
        bz2.BZ2Compressor # silence unused import warning
    except ImportError:
        raise SystemExit(
            "Couldn't import standard bz2 (incomplete Python install).")

ispypy = "PyPy" in sys.version

hgrustext = os.environ.get('HGWITHRUSTEXT')
# TODO record it for proper rebuild upon changes

import stat, subprocess, time
import re
import shutil
import tempfile
from distutils import log
# We have issues with setuptools on some platforms and builders. Until
# those are resolved, setuptools is opt-in except for platforms where
# we don't have issues.
issetuptools = (os.name == 'nt' or 'FORCE_SETUPTOOLS' in os.environ)
if issetuptools:
    from setuptools import setup
else:
    from distutils.core import setup
from distutils.ccompiler import new_compiler

from distutils.version import StrictVersion

# Explain to distutils.StrictVersion how our release candidates are versionned
StrictVersion.version_re = re.compile(r'^(\d+)\.(\d+)(\.(\d+))?-?(rc(\d+))?$')

def write_if_changed(path, content):
    """Write content to a file iff the content hasn't changed."""
    if os.path.exists(path):
        with open(path, 'rb') as fh:
            current = fh.read()

    if current != content:
        with open(path, 'wb') as fh:
            fh.write(content)

scripts = ['hg']
if os.name == 'nt':
    # We remove hg.bat if we are able to build hg.exe.
    scripts.append('contrib/win32/hg.bat')

def cancompile(cc, code):
    tmpdir = tempfile.mkdtemp(prefix='hg-install-')
    devnull = oldstderr = None
    try:

            os.dup2(oldstderr, sys.stderr.fileno())
        if devnull is not None:
            devnull.close()
        shutil.rmtree(tmpdir)

# simplified version of distutils.ccompiler.CCompiler.has_function
# that actually removes its temporary files.
def hasfunction(cc, funcname):
    code = 'int main(void) { %s(); }\n' % funcname
    return cancompile(cc, code)

def hasheader(cc, headername):
    code = '#include <%s>\nint main(void) { return 0; }\n' % headername
    return cancompile(cc, code)

# py2exe needs to be installed to work
try:
    import py2exe
    py2exe.Distribution # silence unused import warning
    py2exeloaded = True
    # import py2exe's patched Distribution class
    from distutils.core import Distribution
except ImportError:
    py2exeloaded = False

def runcmd(cmd, env, cwd=None):
    p = subprocess.Popen(cmd, stdout=subprocess.PIPE,
                         stderr=subprocess.PIPE, env=env, cwd=cwd)
    out, err = p.communicate()
    return p.returncode, out, err

class hgcommand(object):
    def __init__(self, cmd, env):
        self.cmd = cmd
        self.env = env

            printf("stderr from '%s':" % (' '.join(cmd)), file=sys.stderr)
            printf(err, file=sys.stderr)
            return ''
        return out

def filterhgerr(err):
    # If root is executing setup.py, but the repository is owned by
    # another user (as in "sudo python setup.py install") we will get
    # trust warnings since the .hg/hgrc file is untrusted. That is
    # fine, we don't want to load it anyway.  Python may warn about
    # a missing __init__.py in mercurial/locale, we also ignore that.
    err = [e for e in err.splitlines()
           if (not e.startswith(b'not trusting file')
               and not e.startswith(b'warning: Not importing')
               and not e.startswith(b'obsolete feature not enabled')
               and not e.startswith(b'*** failed to import extension')
               and not e.startswith(b'devel-warn:')
               and not (e.startswith(b'(third party extension')
                        and e.endswith(b'or newer of Mercurial; disabling)')))]
    return b'\n'.join(b'  ' + e for e in err)

def findhg():
    """Try to figure out how we should invoke hg for examining the local
    repository contents.

    except EnvironmentError:
        retcode = -1
    if retcode == 0 and not filterhgerr(err):
        return hgcommand(hgcmd, hgenv)

    raise SystemExit('Unable to find a working hg binary to extract the '
                     'version from the repository tags')

def localhgenv():
    """Get an environment dictionary to use for invoking or importing
    mercurial from the local repository."""
    # Execute hg out of this directory with a custom environment which takes
    # care to not use any hgrc files and do no localization.
    env = {'HGMODULEPOLICY': 'py',
           'HGRCPATH': '',
           'LANGUAGE': 'C',
           'PATH': ''} # make pypi modules that use os.environ['PATH'] happy
    if 'LD_LIBRARY_PATH' in os.environ:
        env['LD_LIBRARY_PATH'] = os.environ['LD_LIBRARY_PATH']
    if 'SystemRoot' in os.environ:
        # SystemRoot is required by Windows to load various DLLs.  See:
        # https://bugs.python.org/issue13524#msg148850
        env['SystemRoot'] = os.environ['SystemRoot']
    return env

version = ''

if os.path.isdir('.hg'):
    hg = findhg()

        # Bail out if hg is having problems interacting with this repository,
        # rather than falling through and producing a bogus version number.
        # Continuing with an invalid version number will break extensions
        # that define minimumhgversion.
        raise SystemExit('Unable to determine hg version from local repository')
    if numerictags: # tag(s) found
        version = numerictags[-1]
        if hgid.endswith('+'): # propagate the dirty status to the tag
            version += '+'
    else: # no tag found
        ltagcmd = ['parents', '--template', '{latesttag}']
        ltag = sysstr(hg.run(ltagcmd))
        changessincecmd = ['log', '-T', 'x\n', '-r', "only(.,'%s')" % ltag]
        changessince = len(hg.run(changessincecmd).splitlines())
        version = '%s+%s-%s' % (ltag, changessince, hgid)
    if version.endswith('+'):
        version += time.strftime('%Y%m%d')
elif os.path.exists('.hg_archival.txt'):
    kw = dict([[t.strip() for t in l.split(':', 1)]
               for l in open('.hg_archival.txt')])
    if 'tag' in kw:
        version = kw['tag']
    elif 'latesttag' in kw:
        if 'changessincelatesttag' in kw:
            version = '%(latesttag)s+%(changessincelatesttag)s-%(node).12s' % kw

if version:
    versionb = version
    if not isinstance(versionb, bytes):
        versionb = versionb.encode('ascii')

    write_if_changed('mercurial/__version__.py', b''.join([
        b'# this file is autogenerated by setup.py\n'
        b'version = b"%s"\n' % versionb,
    ]))

try:
    oldpolicy = os.environ.get('HGMODULEPOLICY', None)
    os.environ['HGMODULEPOLICY'] = 'py'
    from mercurial import __version__
    version = __version__.version
except ImportError:
    version = b'unknown'
finally:
    if oldpolicy is None:
        del os.environ['HGMODULEPOLICY']
    else:
        os.environ['HGMODULEPOLICY'] = oldpolicy

class hgbuild(build):
    # Insert hgbuildmo first so that files in mercurial/locale/ are found
    # when build_py is run next.
    sub_commands = [('build_mo', None)] + build.sub_commands

class hgbuildmo(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)

    def has_ext_modules(self):
        # self.ext_modules is emptied in hgbuildpy.finalize_options which is
        # too late for some cases
        return not self.pure and Distribution.has_ext_modules(self)

# This is ugly as a one-liner. So use a variable.
buildextnegops = dict(getattr(build_ext, 'negative_options', {}))
buildextnegops['no-zstd'] = 'zstd'
buildextnegops['no-rust'] = 'rust'

class hgbuildext(build_ext):
    user_options = build_ext.user_options + [
        ('zstd', None, 'compile zstd bindings [default]'),
        ('no-zstd', None, 'do not compile zstd bindings'),
        ('rust', None,
         'compile Rust extensions if they are in use '
         '(requires Cargo) [default]'),
        ('no-rust', None, 'do not compile Rust extensions'),
    ]

    boolean_options = build_ext.boolean_options + ['zstd', 'rust']
    negative_opt = buildextnegops

            self.parallel = True

        return build_ext.finalize_options(self)

    def build_extensions(self):
        ruststandalones = [e for e in self.extensions
                           if isinstance(e, RustStandaloneExtension)]
        self.extensions = [e for e in self.extensions
                           if e not in ruststandalones]
        # Filter out zstd if disabled via argument.
        if not self.zstd:
            self.extensions = [e for e in self.extensions
                               if e.name != 'mercurial.zstd']

        # Build Rust standalon extensions if it'll be used
        # and its build is not explictely disabled (for external build
        # as Linux distributions would do)
        if self.distribution.rust and self.rust and hgrustext != 'direct-ffi':

                rustext.build('' if self.inplace else self.build_lib)

        return build_ext.build_extensions(self)

    def build_extension(self, ext):
        if (self.distribution.rust and self.rust
            and isinstance(ext, RustExtension)):
                ext.rustbuild()
        try:
            build_ext.build_extension(self, ext)
        except CCompilerError:
            if not getattr(ext, 'optional', False):
                raise
            log.warn("Failed to build optional extension '%s' (skipping)",
                     ext.name)

class hgbuildscripts(build_scripts):
    def run(self):
        if os.name != 'nt' or self.distribution.pure:
            return build_scripts.run(self)

            # Remove hg.bat because it is redundant with hg.exe.
            self.scripts.remove('contrib/win32/hg.bat')

        return build_scripts.run(self)

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

        if self.distribution.pure:

        elif self.distribution.cffi:
            from mercurial.cffi import (
                bdiffbuild,
                mpatchbuild,
            )
            exts = [mpatchbuild.ffi.distutils_extension(),
                    bdiffbuild.ffi.distutils_extension()]
            # cffi modules go here
            if sys.platform == 'darwin':
                from mercurial.cffi import osutilbuild
                exts.append(osutilbuild.ffi.distutils_extension())
            self.distribution.ext_modules = exts
        else:
            h = os.path.join(get_python_inc(), 'Python.h')
            if not os.path.exists(h):
                raise SystemExit('Python headers are required to build '
                                 'Mercurial but weren\'t found in %s' % h)

    def run(self):
        basepath = os.path.join(self.build_lib, 'mercurial')
        self.mkpath(basepath)

            # in-place build should run without rebuilding and Rust extensions
            modulepolicy = 'rust+c-allow' if rust else 'allow'
        else:
            modulepolicy = 'rust+c' if rust else 'c'

        content = b''.join([
            b'# this file is autogenerated by setup.py\n',
            b'modulepolicy = b"%s"\n' % modulepolicy.encode('ascii'),
        ])
        write_if_changed(os.path.join(basepath, '__modulepolicy__.py'),
                         content)

        build_py.run(self)

class buildhgextindex(Command):
    description = 'generate prebuilt index of hgext (for frozen package)'
    user_options = []
    _indexfilename = 'hgext/__index__.py'

        if os.path.exists(self._indexfilename):
            with open(self._indexfilename, 'w') as f:
                f.write('# empty\n')

        # here no extension enabled, disabled() lists up everything
        code = ('import pprint; from mercurial import extensions; '
                'pprint.pprint(extensions.disabled())')
        returncode, out, err = runcmd([sys.executable, '-c', code],
                                      localhgenv())
        if err or returncode != 0:
            raise DistutilsExecError(err)

        with open(self._indexfilename, 'wb') as f:
            f.write(b'# this file is autogenerated by setup.py\n')
            f.write(b'docs = ')
            f.write(out)

class buildhgexe(build_ext):
    description = 'compile hg.exe from mercurial/exewrapper.c'
    user_options = build_ext.user_options + [
        ('long-paths-support', None, 'enable support for long paths on '
                                     'Windows (off by default and '
                                     'experimental)'),
    ]

    LONG_PATHS_MANIFEST = """
    <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
    <assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">

    def build_extensions(self):
        if os.name != 'nt':
            return
        if isinstance(self.compiler, HackedMingw32CCompiler):
            self.compiler.compiler_so = self.compiler.compiler # no -mdll
            self.compiler.dll_libraries = [] # no -lmsrvc90

        # Different Python installs can have different Python library
        # names. e.g. the official CPython distribution uses pythonXY.dll
        # and MinGW uses libpythonX.Y.dll.
        _kernel32 = ctypes.windll.kernel32
        _kernel32.GetModuleFileNameA.argtypes = [ctypes.c_void_p,
                                                 ctypes.c_void_p,
                                                 ctypes.c_ulong]
        _kernel32.GetModuleFileNameA.restype = ctypes.c_ulong
        size = 1000
        buf = ctypes.create_string_buffer(size + 1)
        filelen = _kernel32.GetModuleFileNameA(sys.dllhandle, ctypes.byref(buf),
                                               size)

        if filelen > 0 and filelen != size:
            dllbasename = os.path.basename(buf.value)
            if not dllbasename.lower().endswith(b'.dll'):
                raise SystemExit('Python DLL does not end with .dll: %s' %
                                 dllbasename)
            pythonlib = dllbasename[:-4]
        else:
            log.warn('could not determine Python DLL filename; '
                     'assuming pythonXY')

            hv = sys.hexversion
            pythonlib = 'python%d%d' % (hv >> 24, (hv >> 16) & 0xff)

        log.info('using %s as Python library name' % pythonlib)
        with open('mercurial/hgpythonlib.h', 'wb') as f:
            f.write(b'/* this file is autogenerated by setup.py */\n')
            f.write(b'#define HGPYTHONLIB "%s"\n' % pythonlib)

        macros = None
        if sys.version_info[0] >= 3:
            macros = [('_UNICODE', None), ('UNICODE', None)]

        objects = self.compiler.compile(['mercurial/exewrapper.c'],
                                         output_dir=self.build_temp,
                                         macros=macros)
        dir = os.path.dirname(self.get_ext_fullpath('dummy'))
        self.hgtarget = os.path.join(dir, 'hg')
        self.compiler.link_executable(objects, self.hgtarget,
                                      libraries=[],
                                      output_dir=self.build_temp)
        if self.long_paths_support:
            self.addlongpathsmanifest()

    def addlongpathsmanifest(self):
        r"""Add manifest pieces so that hg.exe understands long paths

        inputresource = '-inputresource:%s;#1' % exefname
        outputresource = '-outputresource:%s;#1' % exefname
        log.info("running mt.exe to update hg.exe's manifest in-place")
        # supplying both -manifest and -inputresource to mt.exe makes
        # it merge the embedded and supplied manifests in the -outputresource
        self.spawn(['mt.exe', '-nologo', '-manifest', manfname,
                    inputresource, outputresource])
        log.info("done updating hg.exe's manifest")
        os.remove(manfname)

    @property
    def hgexepath(self):
        dir = os.path.dirname(self.get_ext_fullpath('dummy'))
        return os.path.join(self.build_temp, dir, 'hg.exe')

class hgbuilddoc(Command):
    description = 'build documentation'
    user_options = [
        ('man', None, 'generate man pages'),

        def gentxt(root):
            txt = 'doc/%s.txt' % root
            log.info('generating %s' % txt)
            res, out, err = runcmd(
                [sys.executable, 'gendoc.py', root],
                os.environ,
                cwd='doc')
            if res:
                raise SystemExit('error running gendoc.py: %s' %
                                 '\n'.join([out, err]))

            with open(txt, 'wb') as fh:
                fh.write(out)

        def gengendoc(root):

            log.info('generating %s' % gendoc)
            res, out, err = runcmd(
                [sys.executable, 'gendoc.py', '%s.gendoc' % root],
                os.environ,
                cwd='doc')
            if res:
                raise SystemExit('error running gendoc: %s' %
                                 '\n'.join([out, err]))

            with open(gendoc, 'wb') as fh:
                fh.write(out)

        def genman(root):
            log.info('generating doc/%s' % root)
            res, out, err = runcmd(
                [sys.executable, 'runrst', 'hgmanpage', '--halt', 'warning',
                 '--strip-elements-with-class', 'htmlonly',
                 '%s.txt' % root, root],
                os.environ,
                cwd='doc')
            if res:
                raise SystemExit('error running runrst: %s' %
                                 '\n'.join([out, err]))

            normalizecrlf('doc/%s' % root)

        def genhtml(root):
            log.info('generating doc/%s.html' % root)
            res, out, err = runcmd(
                [sys.executable, 'runrst', 'html', '--halt', 'warning',
                 '--link-stylesheet', '--stylesheet-path', 'style.css',
                 '%s.txt' % root, '%s.html' % root],
                os.environ,
                cwd='doc')
            if res:
                raise SystemExit('error running runrst: %s' %
                                 '\n'.join([out, err]))

            normalizecrlf('doc/%s.html' % root)

        # This logic is duplicated in doc/Makefile.
        sources = set(f for f in os.listdir('mercurial/help')
                      if re.search(r'[0-9]\.txt$', f))

        # common.txt is a one-off.
        gentxt('common')

        for source in sorted(sources):

            if self.man:
                genman(root)
            if self.html:
                genhtml(root)

class hginstall(install):

    user_options = install.user_options + [
        ('old-and-unmanageable', None,
         'noop, present for eggless setuptools compat'),
        ('single-version-externally-managed', None,
         'noop, present for eggless setuptools compat'),
    ]

    # Also helps setuptools not be sad while we refuse to create eggs.
    single_version_externally_managed = True

        # Screen out egg related commands to prevent egg generation.  But allow
        # mercurial.egg-info generation, since that is part of modern
        # packaging.
        excl = set(['bdist_egg'])
        return filter(lambda x: x not in excl, install.get_sub_commands(self))

class hginstalllib(install_lib):
    '''
    This is a specialization of install_lib that replaces the copy_file used
    there so that it supports setting the mode of files after copying them,

    insufficient, as it might still be applying a umask.
    '''

    def run(self):
        realcopyfile = file_util.copy_file
        def copyfileandsetmode(*args, **kwargs):
            src, dst = args[0], args[1]
            dst, copied = realcopyfile(*args, **kwargs)
            if copied:
                st = os.stat(src)

                else:
                    setmode = int('0644', 8)
                m = stat.S_IMODE(st[stat.ST_MODE])
                m = (m & ~int('0777', 8)) | setmode
                os.chmod(dst, m)
        file_util.copy_file = copyfileandsetmode
        try:
            install_lib.run(self)
        finally:
            file_util.copy_file = realcopyfile

class hginstallscripts(install_scripts):
    '''
    This is a specialization of install_scripts that replaces the @LIBDIR@ with
    the configured directory for modules. If possible, the path is made relative

        self.install_lib = None

    def finalize_options(self):
        install_scripts.finalize_options(self)
        self.set_undefined_options('install',
                                   ('install_lib', 'install_lib'))

    def run(self):
        install_scripts.run(self)

        # It only makes sense to replace @LIBDIR@ with the install path if

        # will be. And, wheels don't appear to provide the ability to register
        # custom code to run during wheel installation. This all means that
        # we can't reliably set the libdir in wheels: the default behavior
        # of looking in sys.path must do.

        if (os.path.splitdrive(self.install_dir)[0] !=
            os.path.splitdrive(self.install_lib)[0]):
            # can't make relative paths from one drive to another, so use an
            # absolute path instead
            libdir = self.install_lib
        else:
            common = os.path.commonprefix((self.install_dir, self.install_lib))
            rest = self.install_dir[len(common):]
            uplevel = len([n for n in os.path.split(rest) if n])

            libdir = uplevel * ('..' + os.sep) + self.install_lib[len(common):]

        for outfile in self.outfiles:
            with open(outfile, 'rb') as fp:
                data = fp.read()

            # During local installs, the shebang will be rewritten to the final
            # install path. During wheel packaging, the shebang has a special
            # value.
            if data.startswith(b'#!python'):
                log.info('not rewriting @LIBDIR@ in %s because install path '
                         'not known' % outfile)
                continue

            data = data.replace(b'@LIBDIR@', libdir.encode(libdir_escape))
            with open(outfile, 'wb') as fp:
                fp.write(data)

# virtualenv installs custom distutils/__init__.py and
# distutils/distutils.cfg files which essentially proxy back to the
# "real" distutils in the main Python install. The presence of this
# directory causes py2exe to pick up the "hacked" distutils package

                    modules[k] = v

            res.modules = modules

            import opcode
            distutilsreal = os.path.join(os.path.dirname(opcode.__file__),
                                         'distutils')

            for root, dirs, files in os.walk(distutilsreal):
                for f in sorted(files):
                    if not f.endswith('.py'):
                        continue

                    if modname.startswith('distutils.tests.'):
                        continue

                    if modname.endswith('.__init__'):
                        modname = modname[:-len('.__init__')]
                        path = os.path.dirname(full)
                    else:
                        path = None

                    res.modules[modname] = py2exemodule(modname, full,
                                                        path=path)

            if 'distutils' not in res.modules:
                raise SystemExit('could not find distutils modules')

            return res

cmdclass = {'build': hgbuild,
            'build_doc': hgbuilddoc,
            'build_mo': hgbuildmo,
            'build_ext': hgbuildext,
            'build_py': hgbuildpy,
            'build_scripts': hgbuildscripts,
            'build_hgextindex': buildhgextindex,
            'install': hginstall,
            'install_lib': hginstalllib,
            'install_scripts': hginstallscripts,
            'build_hgexe': buildhgexe,
            }

if py2exehacked:
    cmdclass['py2exe'] = hgbuildpy2exe

packages = ['mercurial',
            'mercurial.cext',
            'mercurial.cffi',
            'mercurial.hgweb',
            'mercurial.interfaces',
            'mercurial.pure',
            'mercurial.thirdparty',
            'mercurial.thirdparty.attr',
            'mercurial.thirdparty.zope',
            'mercurial.thirdparty.zope.interface',
            'mercurial.utils',
            'mercurial.revlogutils',
            'mercurial.testing',
            'hgext', 'hgext.convert', 'hgext.fsmonitor',
            'hgext.fastannotate',
            'hgext.fsmonitor.pywatchman',
            'hgext.highlight',
            'hgext.infinitepush',
            'hgext.largefiles', 'hgext.lfs', 'hgext.narrow',
            'hgext.remotefilelog',
            'hgext.zeroconf', 'hgext3rd',
            'hgdemandimport']
if sys.version_info[0] == 2:
    packages.extend(['mercurial.thirdparty.concurrent',
                     'mercurial.thirdparty.concurrent.futures'])

if 'HG_PY2EXE_EXTRA_INSTALL_PACKAGES' in os.environ:
    # py2exe can't cope with namespace packages very well, so we have to
    # install any hgext3rd.* extensions that we want in the final py2exe
    # image here. This is gross, but you gotta do what you gotta do.
    packages.extend(os.environ['HG_PY2EXE_EXTRA_INSTALL_PACKAGES'].split(' '))

common_depends = ['mercurial/bitmanipulation.h',
                  'mercurial/compat.h',
                  'mercurial/cext/util.h']
common_include_dirs = ['mercurial']

osutil_cflags = []
osutil_ldflags = []

for plat, func in [('bsd', 'setproctitle')]:
    if re.search(plat, sys.platform) and hasfunction(new_compiler(), func):
        osutil_cflags.append('-DHAVE_%s' % func.upper())

for plat, macro, code in [
    ('bsd|darwin', 'BSD_STATFS', '''
     #include <sys/param.h>
     #include <sys/mount.h>
     int main() { struct statfs s; return sizeof(s.f_fstypename); }
     '''),
    ('linux', 'LINUX_STATFS', '''
     #include <linux/magic.h>
     #include <sys/vfs.h>
     int main() { struct statfs s; return sizeof(s.f_type); }
     '''),
]:
    if re.search(plat, sys.platform) and cancompile(new_compiler(), code):
        osutil_cflags.append('-DHAVE_%s' % macro)

if sys.platform == 'darwin':

    'mercurial/thirdparty/xdiff/xprepare.h',
    'mercurial/thirdparty/xdiff/xtypes.h',
    'mercurial/thirdparty/xdiff/xutils.h',
]

class RustCompilationError(CCompilerError):
    """Exception class for Rust compilation errors."""

class RustExtension(Extension):
    """Base classes for concrete Rust Extension classes.
    """

    rusttargetdir = os.path.join('rust', 'target', 'release')

    def __init__(self, mpath, sources, rustlibname, subcrate,
                 py3_features=None, **kw):
        Extension.__init__(self, mpath, sources, **kw)
        srcdir = self.rustsrcdir = os.path.join('rust', subcrate)
        self.py3_features = py3_features

        # adding Rust source and control files to depends so that the extension

        self.depends.append(os.path.join(srcdir, 'Cargo.toml'))
        cargo_lock = os.path.join(srcdir, 'Cargo.lock')
        if os.path.exists(cargo_lock):
            self.depends.append(cargo_lock)
        for dirpath, subdir, fnames in os.walk(os.path.join(srcdir, 'src')):
            self.depends.extend(os.path.join(dirpath, fname)
                                for fname in fnames
                                if os.path.splitext(fname)[1] == '.rs')

    @staticmethod
    def rustdylibsuffix():
        """Return the suffix for shared libraries produced by rustc.

            # invoke this build.

            # Unix only fix (os.path.expanduser not really reliable if
            # HOME is shadowed like this)
            import pwd
            env['HOME'] = pwd.getpwuid(os.getuid()).pw_dir

        cargocmd = ['cargo', 'rustc', '-vv', '--release']
        if sys.version_info[0] == 3 and self.py3_features is not None:
            cargocmd.extend(('--features', self.py3_features,
                             '--no-default-features'))
        cargocmd.append('--')
        if sys.platform == 'darwin':
            cargocmd.extend(("-C", "link-arg=-undefined",
                             "-C", "link-arg=dynamic_lookup"))
        try:
            subprocess.check_call(cargocmd, env=env, cwd=self.rustsrcdir)
        except OSError as exc:
            if exc.errno == errno.ENOENT:
                raise RustCompilationError("Cargo not found")
            elif exc.errno == errno.EACCES:
                raise RustCompilationError(
                    "Cargo found, but permisssion to execute it is denied")
            else:
                raise
        except subprocess.CalledProcessError:
            raise RustCompilationError(
                "Cargo failed. Working directory: %r, "
                "command: %r, environment: %r"
                % (self.rustsrcdir, cargocmd, env))

class RustEnhancedExtension(RustExtension):
    """A C Extension, conditionally enhanced with Rust code.

    If the HGRUSTEXT environment variable is set to something else
    than 'cpython', the Rust sources get compiled and linked within the
    C target shared library object.
    """

    def __init__(self, mpath, sources, rustlibname, subcrate, **kw):
        RustExtension.__init__(self, mpath, sources, rustlibname, subcrate,
                               **kw)
        if hgrustext != 'direct-ffi':
            return
        self.extra_compile_args.append('-DWITH_RUST')
        self.libraries.append(rustlibname)
        self.library_dirs.append(self.rusttargetdir)

    def rustbuild(self):
        if hgrustext == 'direct-ffi':
            RustExtension.rustbuild(self)

class RustStandaloneExtension(RustExtension):

    def __init__(self, pydottedname, rustcrate, dylibname, **kw):
        RustExtension.__init__(self, pydottedname, [], dylibname, rustcrate,
                               **kw)
        self.dylibname = dylibname

    def build(self, target_dir):
        self.rustbuild()
        target = [target_dir]
        target.extend(self.name.split('.'))
        target[-1] += DYLIB_SUFFIX
        shutil.copy2(os.path.join(self.rusttargetdir,
                                  self.dylibname + self.rustdylibsuffix()),
                     os.path.join(*target))


extmodules = [
    Extension('mercurial.cext.base85', ['mercurial/cext/base85.c'],
              include_dirs=common_include_dirs,
              depends=common_depends),
    Extension('mercurial.cext.bdiff', ['mercurial/bdiff.c',
                                       'mercurial/cext/bdiff.c'] + xdiff_srcs,
              include_dirs=common_include_dirs,
              depends=common_depends + ['mercurial/bdiff.h'] + xdiff_headers),
    Extension('mercurial.cext.mpatch', ['mercurial/mpatch.c',
                                        'mercurial/cext/mpatch.c'],
              include_dirs=common_include_dirs,
              depends=common_depends),
    RustEnhancedExtension(
        'mercurial.cext.parsers', ['mercurial/cext/charencode.c',
                                   'mercurial/cext/dirs.c',
                                   'mercurial/cext/manifest.c',
                                   'mercurial/cext/parsers.c',
                                   'mercurial/cext/pathencode.c',
                                   'mercurial/cext/revlog.c'],
        'hgdirectffi',
        'hg-direct-ffi',
        include_dirs=common_include_dirs,
        depends=common_depends + ['mercurial/cext/charencode.h',
                                  'mercurial/cext/revlog.h',
                                  'rust/hg-core/src/ancestors.rs',
                                  'rust/hg-core/src/lib.rs']),
    Extension('mercurial.cext.osutil', ['mercurial/cext/osutil.c'],
              include_dirs=common_include_dirs,
              extra_compile_args=osutil_cflags,
              extra_link_args=osutil_ldflags,
              depends=common_depends),
    Extension(
        'mercurial.thirdparty.zope.interface._zope_interface_coptimizations', [
        'mercurial/thirdparty/zope/interface/_zope_interface_coptimizations.c',
        ]),
    Extension('hgext.fsmonitor.pywatchman.bser',
              ['hgext/fsmonitor/pywatchman/bser.c']),
    RustStandaloneExtension('mercurial.rustext', 'hg-cpython', 'librusthg',
                            py3_features='python3'),
    ]


sys.path.insert(0, 'contrib/python-zstandard')
import setup_zstd
extmodules.append(setup_zstd.get_c_extension(
    name='mercurial.zstd',
    root=os.path.abspath(os.path.dirname(__file__))))

try:
    from distutils import cygwinccompiler

    # the -mno-cygwin option has been deprecated for years

    # distributions like the ones from the optware project for Synology
    # DiskStation boxes
    class HackedMingw32CCompiler(object):
        pass

if os.name == 'nt':
    # Allow compiler/linker flags to be added to Visual Studio builds.  Passing
    # extra_link_args to distutils.extensions.Extension() doesn't have any
    # effect.
    from distutils import msvccompiler

            self.ldflags_shared.append('/ignore:4197')
            self.ldflags_shared_debug.append('/ignore:4197')

    msvccompiler.MSVCCompiler = HackedMSVCCompiler

packagedata = {'mercurial': ['locale/*/LC_MESSAGES/hg.mo',
                             'help/*.txt',
                             'help/internals/*.txt',
                             'default.d/*.rc',
                             'dummycert.pem']}

def ordinarypath(p):
    return p and p[0] != '.' and p[-1] != '~'

for root in ('templates',):
    for curdir, dirs, files in os.walk(os.path.join('mercurial', root)):
        curdir = curdir.split(os.sep, 1)[1]
        dirs[:] = filter(ordinarypath, dirs)

if issetuptools:
    extra['python_requires'] = supportedpy

if py2exeloaded:
    extra['console'] = [
        {'script':'hg',
         'copyright':'Copyright (C) 2005-2019 Matt Mackall and others',
         'product_version':version}]
    # Sub command of 'build' because 'py2exe' does not handle sub_commands.
    # Need to override hgbuild because it has a private copy of
    # build.sub_commands.
    hgbuild.sub_commands.insert(0, ('build_hgextindex', None))
    # put dlls in sub directory so that they won't pollute PATH

    version = runcmd(['/usr/bin/xcodebuild', '-version'], {})[1].splitlines()
    if version:
        version = version[0]
        if sys.version_info[0] == 3:
            version = version.decode('utf-8')
        xcode4 = (version.startswith('Xcode') and
                  StrictVersion(version.split()[1]) >= StrictVersion('4.0'))
        xcode51 = re.match(r'^Xcode\s+5\.1', version) is not None
    else:
        # xcodebuild returns empty on OS X Lion with XCode 4.3 not
        # installed, but instead with only command-line tools. Assume
        # that only happens on >= Lion, thus no PPC support.

    # so Mercurial can continue to compile in the meantime.
    if xcode51:
        cflags = get_config_var('CFLAGS')
        if cflags and re.search(r'-mno-fused-madd\b', cflags) is not None:
            os.environ['CFLAGS'] = (
                os.environ.get('CFLAGS', '') + ' -Qunused-arguments')

setup(name='mercurial',
      version=setupversion,
      author='Matt Mackall and many others',
      author_email='[e-mail]',
      url='https://mercurial-scm.org/',
      download_url='https://mercurial-scm.org/release/',
      description=('Fast scalable distributed SCM (revision control, version '
                   'control) system'),
      long_description=('Mercurial is a distributed SCM tool written in Python.'
                        ' It is used by a number of large projects that require'
                        ' fast, reliable distributed revision control, such as '
                        'Mozilla.'),
      license='GNU GPLv2 or any later version',
      classifiers=[
          'Development Status :: 6 - Mature',
          'Environment :: Console',
          'Intended Audience :: Developers',
          'Intended Audience :: System Administrators',
          'License :: OSI Approved :: GNU General Public License (GPL)',
          'Natural Language :: Danish',
          'Natural Language :: English',
          'Natural Language :: German',
          'Natural Language :: Italian',
          'Natural Language :: Japanese',
          'Natural Language :: Portuguese (Brazilian)',
          'Operating System :: Microsoft :: Windows',
          'Operating System :: OS Independent',
          'Operating System :: POSIX',
          'Programming Language :: C',
          'Programming Language :: Python',
          'Topic :: Software Development :: Version Control',
      ],
      scripts=scripts,
      packages=packages,
      ext_modules=extmodules,
      data_files=datafiles,
      package_data=packagedata,
      cmdclass=cmdclass,
      distclass=hgdist,
      options={
          'py2exe': {
              'bundle_files': 3,
              'dll_excludes': py2exedllexcludes,
              'excludes': py2exeexcludes,
              'packages': py2exepackages,
          },
          'bdist_mpkg': {
              'zipdist': False,
              'license': 'COPYING',
              'readme': 'contrib/packaging/macosx/Readme.html',
              'welcome': 'contrib/packaging/macosx/Welcome.html',
          },
      },
      **extra)

43076:2372284d9457

    # codecs.escape_encode() where it raises SystemError on empty bytestring
    # bug link: https://bugs.python.org/issue25270
    #
    # TODO: when we actually work on Python 3, use this string as the
    # actual supportedpy string.
    supportedpy = ','.join(
        [
            '>=2.7',
            '!=3.0.*',
            '!=3.1.*',
            '!=3.2.*',
            '!=3.3.*',
            '!=3.4.*',
            '!=3.5.0',
            '!=3.5.1',
            '!=3.5.2',
            '!=3.6.0',
            '!=3.6.1',
        ]
    )

import sys, platform
import sysconfig

if sys.version_info[0] >= 3:
    printf = eval('print')
    libdir_escape = 'unicode_escape'

    def sysstr(s):
        return s.decode('latin-1')


else:
    libdir_escape = 'string_escape'

    def printf(*args, **kwargs):
        f = kwargs.get('file', sys.stdout)
        end = kwargs.get('end', '\n')
        f.write(b' '.join(args) + end)

    def sysstr(s):
        return s


# Attempt to guide users to a modern pip - this means that 2.6 users
# should have a chance of getting a 4.2 release, and when we ratchet
# the version requirement forward again hopefully everyone will get
# something that works for them.
if sys.version_info < (2, 7, 0, 'final'):
    pip_message = (
        'This may be due to an out of date pip. '
        'Make sure you have pip >= 9.0.1.'
    )
    try:
        import pip

        pip_version = tuple([int(x) for x in pip.__version__.split('.')[:3]])
        if pip_version < (9, 0, 1):
            pip_message = (
                'Your pip version is out of date, please install '
                'pip >= 9.0.1. pip {} detected.'.format(pip.__version__)
            )
        else:
            # pip is new enough - it must be something else
            pip_message = ''
    except Exception:
        pass
    error = """
Mercurial does not support Python older than 2.7.
Python {py} detected.
{pip}
""".format(
        py=sys.version_info, pip=pip_message
    )
    printf(error, file=sys.stderr)
    sys.exit(1)

# We don't yet officially support Python 3. But we want to allow developers to
# hack on. Detect and disallow running on Python 3 by default. But provide a

this command. No special environment variables or configuration changes are
necessary to run `hg` with Python 3.

See https://www.mercurial-scm.org/wiki/Python3 for more on Mercurial's
Python 3 support.
""".format(
            py='.'.join('%d' % x for x in sys.version_info[0:2])
        )

        printf(error, file=sys.stderr)
        sys.exit(1)

if sys.version_info[0] >= 3:

    DYLIB_SUFFIX = sysconfig.get_config_vars()['SO']

# Solaris Python packaging brain damage
try:
    import hashlib

    sha = hashlib.sha1()
except ImportError:
    try:
        import sha

        sha.sha  # silence unused import warning
    except ImportError:
        raise SystemExit(
            "Couldn't import standard hashlib (incomplete Python install)."
        )

try:
    import zlib

    zlib.compressobj  # silence unused import warning
except ImportError:
    raise SystemExit(
        "Couldn't import standard zlib (incomplete Python install)."
    )

# The base IronPython distribution (as of 2.7.1) doesn't support bz2
isironpython = False
try:
    isironpython = (
        platform.python_implementation().lower().find("ironpython") != -1
    )
except AttributeError:
    pass

if isironpython:
    sys.stderr.write("warning: IronPython detected (no bz2 support)\n")
else:
    try:
        import bz2

        bz2.BZ2Compressor  # silence unused import warning
    except ImportError:
        raise SystemExit(
            "Couldn't import standard bz2 (incomplete Python install)."
        )

ispypy = "PyPy" in sys.version

hgrustext = os.environ.get('HGWITHRUSTEXT')
# TODO record it for proper rebuild upon changes

import stat, subprocess, time
import re
import shutil
import tempfile
from distutils import log

# We have issues with setuptools on some platforms and builders. Until
# those are resolved, setuptools is opt-in except for platforms where
# we don't have issues.
issetuptools = os.name == 'nt' or 'FORCE_SETUPTOOLS' in os.environ
if issetuptools:
    from setuptools import setup
else:
    from distutils.core import setup
from distutils.ccompiler import new_compiler

from distutils.version import StrictVersion

# Explain to distutils.StrictVersion how our release candidates are versionned
StrictVersion.version_re = re.compile(r'^(\d+)\.(\d+)(\.(\d+))?-?(rc(\d+))?$')


def write_if_changed(path, content):
    """Write content to a file iff the content hasn't changed."""
    if os.path.exists(path):
        with open(path, 'rb') as fh:
            current = fh.read()

    if current != content:
        with open(path, 'wb') as fh:
            fh.write(content)


scripts = ['hg']
if os.name == 'nt':
    # We remove hg.bat if we are able to build hg.exe.
    scripts.append('contrib/win32/hg.bat')


def cancompile(cc, code):
    tmpdir = tempfile.mkdtemp(prefix='hg-install-')
    devnull = oldstderr = None
    try:

            os.dup2(oldstderr, sys.stderr.fileno())
        if devnull is not None:
            devnull.close()
        shutil.rmtree(tmpdir)


# simplified version of distutils.ccompiler.CCompiler.has_function
# that actually removes its temporary files.
def hasfunction(cc, funcname):
    code = 'int main(void) { %s(); }\n' % funcname
    return cancompile(cc, code)


def hasheader(cc, headername):
    code = '#include <%s>\nint main(void) { return 0; }\n' % headername
    return cancompile(cc, code)


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

    py2exe.Distribution  # silence unused import warning
    py2exeloaded = True
    # import py2exe's patched Distribution class
    from distutils.core import Distribution
except ImportError:
    py2exeloaded = False


def runcmd(cmd, env, cwd=None):
    p = subprocess.Popen(
        cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, env=env, cwd=cwd
    )
    out, err = p.communicate()
    return p.returncode, out, err


class hgcommand(object):
    def __init__(self, cmd, env):
        self.cmd = cmd
        self.env = env

            printf("stderr from '%s':" % (' '.join(cmd)), file=sys.stderr)
            printf(err, file=sys.stderr)
            return ''
        return out


def filterhgerr(err):
    # If root is executing setup.py, but the repository is owned by
    # another user (as in "sudo python setup.py install") we will get
    # trust warnings since the .hg/hgrc file is untrusted. That is
    # fine, we don't want to load it anyway.  Python may warn about
    # a missing __init__.py in mercurial/locale, we also ignore that.
    err = [
        e
        for e in err.splitlines()
        if (
            not e.startswith(b'not trusting file')
            and not e.startswith(b'warning: Not importing')
            and not e.startswith(b'obsolete feature not enabled')
            and not e.startswith(b'*** failed to import extension')
            and not e.startswith(b'devel-warn:')
            and not (
                e.startswith(b'(third party extension')
                and e.endswith(b'or newer of Mercurial; disabling)')
            )
        )
    ]
    return b'\n'.join(b'  ' + e for e in err)


def findhg():
    """Try to figure out how we should invoke hg for examining the local
    repository contents.

    except EnvironmentError:
        retcode = -1
    if retcode == 0 and not filterhgerr(err):
        return hgcommand(hgcmd, hgenv)

    raise SystemExit(
        'Unable to find a working hg binary to extract the '
        'version from the repository tags'
    )


def localhgenv():
    """Get an environment dictionary to use for invoking or importing
    mercurial from the local repository."""
    # Execute hg out of this directory with a custom environment which takes
    # care to not use any hgrc files and do no localization.
    env = {
        'HGMODULEPOLICY': 'py',
        'HGRCPATH': '',
        'LANGUAGE': 'C',
        'PATH': '',
    }  # make pypi modules that use os.environ['PATH'] happy
    if 'LD_LIBRARY_PATH' in os.environ:
        env['LD_LIBRARY_PATH'] = os.environ['LD_LIBRARY_PATH']
    if 'SystemRoot' in os.environ:
        # SystemRoot is required by Windows to load various DLLs.  See:
        # https://bugs.python.org/issue13524#msg148850
        env['SystemRoot'] = os.environ['SystemRoot']
    return env


version = ''

if os.path.isdir('.hg'):
    hg = findhg()

        # Bail out if hg is having problems interacting with this repository,
        # rather than falling through and producing a bogus version number.
        # Continuing with an invalid version number will break extensions
        # that define minimumhgversion.
        raise SystemExit('Unable to determine hg version from local repository')
    if numerictags:  # tag(s) found
        version = numerictags[-1]
        if hgid.endswith('+'):  # propagate the dirty status to the tag
            version += '+'
    else:  # no tag found
        ltagcmd = ['parents', '--template', '{latesttag}']
        ltag = sysstr(hg.run(ltagcmd))
        changessincecmd = ['log', '-T', 'x\n', '-r', "only(.,'%s')" % ltag]
        changessince = len(hg.run(changessincecmd).splitlines())
        version = '%s+%s-%s' % (ltag, changessince, hgid)
    if version.endswith('+'):
        version += time.strftime('%Y%m%d')
elif os.path.exists('.hg_archival.txt'):
    kw = dict(
        [[t.strip() for t in l.split(':', 1)] for l in open('.hg_archival.txt')]
    )
    if 'tag' in kw:
        version = kw['tag']
    elif 'latesttag' in kw:
        if 'changessincelatesttag' in kw:
            version = '%(latesttag)s+%(changessincelatesttag)s-%(node).12s' % kw

if version:
    versionb = version
    if not isinstance(versionb, bytes):
        versionb = versionb.encode('ascii')

    write_if_changed(
        'mercurial/__version__.py',
        b''.join(
            [
                b'# this file is autogenerated by setup.py\n'
                b'version = b"%s"\n' % versionb,
            ]
        ),
    )

try:
    oldpolicy = os.environ.get('HGMODULEPOLICY', None)
    os.environ['HGMODULEPOLICY'] = 'py'
    from mercurial import __version__

    version = __version__.version
except ImportError:
    version = b'unknown'
finally:
    if oldpolicy is None:
        del os.environ['HGMODULEPOLICY']
    else:
        os.environ['HGMODULEPOLICY'] = oldpolicy


class hgbuild(build):
    # Insert hgbuildmo first so that files in mercurial/locale/ are found
    # when build_py is run next.
    sub_commands = [('build_mo', None)] + build.sub_commands


class hgbuildmo(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)

    def has_ext_modules(self):
        # self.ext_modules is emptied in hgbuildpy.finalize_options which is
        # too late for some cases
        return not self.pure and Distribution.has_ext_modules(self)


# This is ugly as a one-liner. So use a variable.
buildextnegops = dict(getattr(build_ext, 'negative_options', {}))
buildextnegops['no-zstd'] = 'zstd'
buildextnegops['no-rust'] = 'rust'


class hgbuildext(build_ext):
    user_options = build_ext.user_options + [
        ('zstd', None, 'compile zstd bindings [default]'),
        ('no-zstd', None, 'do not compile zstd bindings'),
        (
            'rust',
            None,
            'compile Rust extensions if they are in use '
            '(requires Cargo) [default]',
        ),
        ('no-rust', None, 'do not compile Rust extensions'),
    ]

    boolean_options = build_ext.boolean_options + ['zstd', 'rust']
    negative_opt = buildextnegops

            self.parallel = True

        return build_ext.finalize_options(self)

    def build_extensions(self):
        ruststandalones = [
            e for e in self.extensions if isinstance(e, RustStandaloneExtension)
        ]
        self.extensions = [
            e for e in self.extensions if e not in ruststandalones
        ]
        # Filter out zstd if disabled via argument.
        if not self.zstd:
            self.extensions = [
                e for e in self.extensions if e.name != 'mercurial.zstd'
            ]

        # Build Rust standalon extensions if it'll be used
        # and its build is not explictely disabled (for external build
        # as Linux distributions would do)
        if self.distribution.rust and self.rust and hgrustext != 'direct-ffi':

                rustext.build('' if self.inplace else self.build_lib)

        return build_ext.build_extensions(self)

    def build_extension(self, ext):
        if (
            self.distribution.rust
            and self.rust
            and isinstance(ext, RustExtension)
        ):
            ext.rustbuild()
        try:
            build_ext.build_extension(self, ext)
        except CCompilerError:
            if not getattr(ext, 'optional', False):
                raise
            log.warn(
                "Failed to build optional extension '%s' (skipping)", ext.name
            )


class hgbuildscripts(build_scripts):
    def run(self):
        if os.name != 'nt' or self.distribution.pure:
            return build_scripts.run(self)

            # Remove hg.bat because it is redundant with hg.exe.
            self.scripts.remove('contrib/win32/hg.bat')

        return build_scripts.run(self)


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

        if self.distribution.pure:

        elif self.distribution.cffi:
            from mercurial.cffi import (
                bdiffbuild,
                mpatchbuild,
            )

            exts = [
                mpatchbuild.ffi.distutils_extension(),
                bdiffbuild.ffi.distutils_extension(),
            ]
            # cffi modules go here
            if sys.platform == 'darwin':
                from mercurial.cffi import osutilbuild

                exts.append(osutilbuild.ffi.distutils_extension())
            self.distribution.ext_modules = exts
        else:
            h = os.path.join(get_python_inc(), 'Python.h')
            if not os.path.exists(h):
                raise SystemExit(
                    'Python headers are required to build '
                    'Mercurial but weren\'t found in %s' % h
                )

    def run(self):
        basepath = os.path.join(self.build_lib, 'mercurial')
        self.mkpath(basepath)

            # in-place build should run without rebuilding and Rust extensions
            modulepolicy = 'rust+c-allow' if rust else 'allow'
        else:
            modulepolicy = 'rust+c' if rust else 'c'

        content = b''.join(
            [
                b'# this file is autogenerated by setup.py\n',
                b'modulepolicy = b"%s"\n' % modulepolicy.encode('ascii'),
            ]
        )
        write_if_changed(os.path.join(basepath, '__modulepolicy__.py'), content)

        build_py.run(self)


class buildhgextindex(Command):
    description = 'generate prebuilt index of hgext (for frozen package)'
    user_options = []
    _indexfilename = 'hgext/__index__.py'

        if os.path.exists(self._indexfilename):
            with open(self._indexfilename, 'w') as f:
                f.write('# empty\n')

        # here no extension enabled, disabled() lists up everything
        code = (
            'import pprint; from mercurial import extensions; '
            'pprint.pprint(extensions.disabled())'
        )
        returncode, out, err = runcmd(
            [sys.executable, '-c', code], localhgenv()
        )
        if err or returncode != 0:
            raise DistutilsExecError(err)

        with open(self._indexfilename, 'wb') as f:
            f.write(b'# this file is autogenerated by setup.py\n')
            f.write(b'docs = ')
            f.write(out)


class buildhgexe(build_ext):
    description = 'compile hg.exe from mercurial/exewrapper.c'
    user_options = build_ext.user_options + [
        (
            'long-paths-support',
            None,
            'enable support for long paths on '
            'Windows (off by default and '
            'experimental)',
        ),
    ]

    LONG_PATHS_MANIFEST = """
    <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
    <assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">

    def build_extensions(self):
        if os.name != 'nt':
            return
        if isinstance(self.compiler, HackedMingw32CCompiler):
            self.compiler.compiler_so = self.compiler.compiler  # no -mdll
            self.compiler.dll_libraries = []  # no -lmsrvc90

        # Different Python installs can have different Python library
        # names. e.g. the official CPython distribution uses pythonXY.dll
        # and MinGW uses libpythonX.Y.dll.
        _kernel32 = ctypes.windll.kernel32
        _kernel32.GetModuleFileNameA.argtypes = [
            ctypes.c_void_p,
            ctypes.c_void_p,
            ctypes.c_ulong,
        ]
        _kernel32.GetModuleFileNameA.restype = ctypes.c_ulong
        size = 1000
        buf = ctypes.create_string_buffer(size + 1)
        filelen = _kernel32.GetModuleFileNameA(
            sys.dllhandle, ctypes.byref(buf), size
        )

        if filelen > 0 and filelen != size:
            dllbasename = os.path.basename(buf.value)
            if not dllbasename.lower().endswith(b'.dll'):
                raise SystemExit(
                    'Python DLL does not end with .dll: %s' % dllbasename
                )
            pythonlib = dllbasename[:-4]
        else:
            log.warn(
                'could not determine Python DLL filename; ' 'assuming pythonXY'
            )

            hv = sys.hexversion
            pythonlib = 'python%d%d' % (hv >> 24, (hv >> 16) & 0xFF)

        log.info('using %s as Python library name' % pythonlib)
        with open('mercurial/hgpythonlib.h', 'wb') as f:
            f.write(b'/* this file is autogenerated by setup.py */\n')
            f.write(b'#define HGPYTHONLIB "%s"\n' % pythonlib)

        macros = None
        if sys.version_info[0] >= 3:
            macros = [('_UNICODE', None), ('UNICODE', None)]

        objects = self.compiler.compile(
            ['mercurial/exewrapper.c'],
            output_dir=self.build_temp,
            macros=macros,
        )
        dir = os.path.dirname(self.get_ext_fullpath('dummy'))
        self.hgtarget = os.path.join(dir, 'hg')
        self.compiler.link_executable(
            objects, self.hgtarget, libraries=[], output_dir=self.build_temp
        )
        if self.long_paths_support:
            self.addlongpathsmanifest()

    def addlongpathsmanifest(self):
        r"""Add manifest pieces so that hg.exe understands long paths

        inputresource = '-inputresource:%s;#1' % exefname
        outputresource = '-outputresource:%s;#1' % exefname
        log.info("running mt.exe to update hg.exe's manifest in-place")
        # supplying both -manifest and -inputresource to mt.exe makes
        # it merge the embedded and supplied manifests in the -outputresource
        self.spawn(
            [
                'mt.exe',
                '-nologo',
                '-manifest',
                manfname,
                inputresource,
                outputresource,
            ]
        )
        log.info("done updating hg.exe's manifest")
        os.remove(manfname)

    @property
    def hgexepath(self):
        dir = os.path.dirname(self.get_ext_fullpath('dummy'))
        return os.path.join(self.build_temp, dir, 'hg.exe')


class hgbuilddoc(Command):
    description = 'build documentation'
    user_options = [
        ('man', None, 'generate man pages'),

        def gentxt(root):
            txt = 'doc/%s.txt' % root
            log.info('generating %s' % txt)
            res, out, err = runcmd(
                [sys.executable, 'gendoc.py', root], os.environ, cwd='doc'
            )
            if res:
                raise SystemExit(
                    'error running gendoc.py: %s' % '\n'.join([out, err])
                )

            with open(txt, 'wb') as fh:
                fh.write(out)

        def gengendoc(root):

            log.info('generating %s' % gendoc)
            res, out, err = runcmd(
                [sys.executable, 'gendoc.py', '%s.gendoc' % root],
                os.environ,
                cwd='doc',
            )
            if res:
                raise SystemExit(
                    'error running gendoc: %s' % '\n'.join([out, err])
                )

            with open(gendoc, 'wb') as fh:
                fh.write(out)

        def genman(root):
            log.info('generating doc/%s' % root)
            res, out, err = runcmd(
                [
                    sys.executable,
                    'runrst',
                    'hgmanpage',
                    '--halt',
                    'warning',
                    '--strip-elements-with-class',
                    'htmlonly',
                    '%s.txt' % root,
                    root,
                ],
                os.environ,
                cwd='doc',
            )
            if res:
                raise SystemExit(
                    'error running runrst: %s' % '\n'.join([out, err])
                )

            normalizecrlf('doc/%s' % root)

        def genhtml(root):
            log.info('generating doc/%s.html' % root)
            res, out, err = runcmd(
                [
                    sys.executable,
                    'runrst',
                    'html',
                    '--halt',
                    'warning',
                    '--link-stylesheet',
                    '--stylesheet-path',
                    'style.css',
                    '%s.txt' % root,
                    '%s.html' % root,
                ],
                os.environ,
                cwd='doc',
            )
            if res:
                raise SystemExit(
                    'error running runrst: %s' % '\n'.join([out, err])
                )

            normalizecrlf('doc/%s.html' % root)

        # This logic is duplicated in doc/Makefile.
        sources = set(
            f
            for f in os.listdir('mercurial/help')
            if re.search(r'[0-9]\.txt$', f)
        )

        # common.txt is a one-off.
        gentxt('common')

        for source in sorted(sources):

            if self.man:
                genman(root)
            if self.html:
                genhtml(root)


class hginstall(install):

    user_options = install.user_options + [
        (
            'old-and-unmanageable',
            None,
            'noop, present for eggless setuptools compat',
        ),
        (
            'single-version-externally-managed',
            None,
            'noop, present for eggless setuptools compat',
        ),
    ]

    # Also helps setuptools not be sad while we refuse to create eggs.
    single_version_externally_managed = True

        # Screen out egg related commands to prevent egg generation.  But allow
        # mercurial.egg-info generation, since that is part of modern
        # packaging.
        excl = set(['bdist_egg'])
        return filter(lambda x: x not in excl, install.get_sub_commands(self))


class hginstalllib(install_lib):
    '''
    This is a specialization of install_lib that replaces the copy_file used
    there so that it supports setting the mode of files after copying them,

    insufficient, as it might still be applying a umask.
    '''

    def run(self):
        realcopyfile = file_util.copy_file

        def copyfileandsetmode(*args, **kwargs):
            src, dst = args[0], args[1]
            dst, copied = realcopyfile(*args, **kwargs)
            if copied:
                st = os.stat(src)

                else:
                    setmode = int('0644', 8)
                m = stat.S_IMODE(st[stat.ST_MODE])
                m = (m & ~int('0777', 8)) | setmode
                os.chmod(dst, m)

        file_util.copy_file = copyfileandsetmode
        try:
            install_lib.run(self)
        finally:
            file_util.copy_file = realcopyfile


class hginstallscripts(install_scripts):
    '''
    This is a specialization of install_scripts that replaces the @LIBDIR@ with
    the configured directory for modules. If possible, the path is made relative

        self.install_lib = None

    def finalize_options(self):
        install_scripts.finalize_options(self)
        self.set_undefined_options('install', ('install_lib', 'install_lib'))

    def run(self):
        install_scripts.run(self)

        # It only makes sense to replace @LIBDIR@ with the install path if

        # will be. And, wheels don't appear to provide the ability to register
        # custom code to run during wheel installation. This all means that
        # we can't reliably set the libdir in wheels: the default behavior
        # of looking in sys.path must do.

        if (
            os.path.splitdrive(self.install_dir)[0]
            != os.path.splitdrive(self.install_lib)[0]
        ):
            # can't make relative paths from one drive to another, so use an
            # absolute path instead
            libdir = self.install_lib
        else:
            common = os.path.commonprefix((self.install_dir, self.install_lib))
            rest = self.install_dir[len(common) :]
            uplevel = len([n for n in os.path.split(rest) if n])

            libdir = uplevel * ('..' + os.sep) + self.install_lib[len(common) :]

        for outfile in self.outfiles:
            with open(outfile, 'rb') as fp:
                data = fp.read()

            # During local installs, the shebang will be rewritten to the final
            # install path. During wheel packaging, the shebang has a special
            # value.
            if data.startswith(b'#!python'):
                log.info(
                    'not rewriting @LIBDIR@ in %s because install path '
                    'not known' % outfile
                )
                continue

            data = data.replace(b'@LIBDIR@', libdir.encode(libdir_escape))
            with open(outfile, 'wb') as fp:
                fp.write(data)


# virtualenv installs custom distutils/__init__.py and
# distutils/distutils.cfg files which essentially proxy back to the
# "real" distutils in the main Python install. The presence of this
# directory causes py2exe to pick up the "hacked" distutils package

                    modules[k] = v

            res.modules = modules

            import opcode

            distutilsreal = os.path.join(
                os.path.dirname(opcode.__file__), 'distutils'
            )

            for root, dirs, files in os.walk(distutilsreal):
                for f in sorted(files):
                    if not f.endswith('.py'):
                        continue

                    if modname.startswith('distutils.tests.'):
                        continue

                    if modname.endswith('.__init__'):
                        modname = modname[: -len('.__init__')]
                        path = os.path.dirname(full)
                    else:
                        path = None

                    res.modules[modname] = py2exemodule(
                        modname, full, path=path
                    )

            if 'distutils' not in res.modules:
                raise SystemExit('could not find distutils modules')

            return res


cmdclass = {
    'build': hgbuild,
    'build_doc': hgbuilddoc,
    'build_mo': hgbuildmo,
    'build_ext': hgbuildext,
    'build_py': hgbuildpy,
    'build_scripts': hgbuildscripts,
    'build_hgextindex': buildhgextindex,
    'install': hginstall,
    'install_lib': hginstalllib,
    'install_scripts': hginstallscripts,
    'build_hgexe': buildhgexe,
}

if py2exehacked:
    cmdclass['py2exe'] = hgbuildpy2exe

packages = [
    'mercurial',
    'mercurial.cext',
    'mercurial.cffi',
    'mercurial.hgweb',
    'mercurial.interfaces',
    'mercurial.pure',
    'mercurial.thirdparty',
    'mercurial.thirdparty.attr',
    'mercurial.thirdparty.zope',
    'mercurial.thirdparty.zope.interface',
    'mercurial.utils',
    'mercurial.revlogutils',
    'mercurial.testing',
    'hgext',
    'hgext.convert',
    'hgext.fsmonitor',
    'hgext.fastannotate',
    'hgext.fsmonitor.pywatchman',
    'hgext.highlight',
    'hgext.infinitepush',
    'hgext.largefiles',
    'hgext.lfs',
    'hgext.narrow',
    'hgext.remotefilelog',
    'hgext.zeroconf',
    'hgext3rd',
    'hgdemandimport',
]
if sys.version_info[0] == 2:
    packages.extend(
        [
            'mercurial.thirdparty.concurrent',
            'mercurial.thirdparty.concurrent.futures',
        ]
    )

if 'HG_PY2EXE_EXTRA_INSTALL_PACKAGES' in os.environ:
    # py2exe can't cope with namespace packages very well, so we have to
    # install any hgext3rd.* extensions that we want in the final py2exe
    # image here. This is gross, but you gotta do what you gotta do.
    packages.extend(os.environ['HG_PY2EXE_EXTRA_INSTALL_PACKAGES'].split(' '))

common_depends = [
    'mercurial/bitmanipulation.h',
    'mercurial/compat.h',
    'mercurial/cext/util.h',
]
common_include_dirs = ['mercurial']

osutil_cflags = []
osutil_ldflags = []

for plat, func in [('bsd', 'setproctitle')]:
    if re.search(plat, sys.platform) and hasfunction(new_compiler(), func):
        osutil_cflags.append('-DHAVE_%s' % func.upper())

for plat, macro, code in [
    (
        'bsd|darwin',
        'BSD_STATFS',
        '''
     #include <sys/param.h>
     #include <sys/mount.h>
     int main() { struct statfs s; return sizeof(s.f_fstypename); }
     ''',
    ),
    (
        'linux',
        'LINUX_STATFS',
        '''
     #include <linux/magic.h>
     #include <sys/vfs.h>
     int main() { struct statfs s; return sizeof(s.f_type); }
     ''',
    ),
]:
    if re.search(plat, sys.platform) and cancompile(new_compiler(), code):
        osutil_cflags.append('-DHAVE_%s' % macro)

if sys.platform == 'darwin':

    'mercurial/thirdparty/xdiff/xprepare.h',
    'mercurial/thirdparty/xdiff/xtypes.h',
    'mercurial/thirdparty/xdiff/xutils.h',
]


class RustCompilationError(CCompilerError):
    """Exception class for Rust compilation errors."""


class RustExtension(Extension):
    """Base classes for concrete Rust Extension classes.
    """

    rusttargetdir = os.path.join('rust', 'target', 'release')

    def __init__(
        self, mpath, sources, rustlibname, subcrate, py3_features=None, **kw
    ):
        Extension.__init__(self, mpath, sources, **kw)
        srcdir = self.rustsrcdir = os.path.join('rust', subcrate)
        self.py3_features = py3_features

        # adding Rust source and control files to depends so that the extension

        self.depends.append(os.path.join(srcdir, 'Cargo.toml'))
        cargo_lock = os.path.join(srcdir, 'Cargo.lock')
        if os.path.exists(cargo_lock):
            self.depends.append(cargo_lock)
        for dirpath, subdir, fnames in os.walk(os.path.join(srcdir, 'src')):
            self.depends.extend(
                os.path.join(dirpath, fname)
                for fname in fnames
                if os.path.splitext(fname)[1] == '.rs'
            )

    @staticmethod
    def rustdylibsuffix():
        """Return the suffix for shared libraries produced by rustc.

            # invoke this build.

            # Unix only fix (os.path.expanduser not really reliable if
            # HOME is shadowed like this)
            import pwd

            env['HOME'] = pwd.getpwuid(os.getuid()).pw_dir

        cargocmd = ['cargo', 'rustc', '-vv', '--release']
        if sys.version_info[0] == 3 and self.py3_features is not None:
            cargocmd.extend(
                ('--features', self.py3_features, '--no-default-features')
            )
        cargocmd.append('--')
        if sys.platform == 'darwin':
            cargocmd.extend(
                ("-C", "link-arg=-undefined", "-C", "link-arg=dynamic_lookup")
            )
        try:
            subprocess.check_call(cargocmd, env=env, cwd=self.rustsrcdir)
        except OSError as exc:
            if exc.errno == errno.ENOENT:
                raise RustCompilationError("Cargo not found")
            elif exc.errno == errno.EACCES:
                raise RustCompilationError(
                    "Cargo found, but permisssion to execute it is denied"
                )
            else:
                raise
        except subprocess.CalledProcessError:
            raise RustCompilationError(
                "Cargo failed. Working directory: %r, "
                "command: %r, environment: %r"
                % (self.rustsrcdir, cargocmd, env)
            )


class RustEnhancedExtension(RustExtension):
    """A C Extension, conditionally enhanced with Rust code.

    If the HGRUSTEXT environment variable is set to something else
    than 'cpython', the Rust sources get compiled and linked within the
    C target shared library object.
    """

    def __init__(self, mpath, sources, rustlibname, subcrate, **kw):
        RustExtension.__init__(
            self, mpath, sources, rustlibname, subcrate, **kw
        )
        if hgrustext != 'direct-ffi':
            return
        self.extra_compile_args.append('-DWITH_RUST')
        self.libraries.append(rustlibname)
        self.library_dirs.append(self.rusttargetdir)

    def rustbuild(self):
        if hgrustext == 'direct-ffi':
            RustExtension.rustbuild(self)


class RustStandaloneExtension(RustExtension):
    def __init__(self, pydottedname, rustcrate, dylibname, **kw):
        RustExtension.__init__(
            self, pydottedname, [], dylibname, rustcrate, **kw
        )
        self.dylibname = dylibname

    def build(self, target_dir):
        self.rustbuild()
        target = [target_dir]
        target.extend(self.name.split('.'))
        target[-1] += DYLIB_SUFFIX
        shutil.copy2(
            os.path.join(
                self.rusttargetdir, self.dylibname + self.rustdylibsuffix()
            ),
            os.path.join(*target),
        )


extmodules = [
    Extension(
        'mercurial.cext.base85',
        ['mercurial/cext/base85.c'],
        include_dirs=common_include_dirs,
        depends=common_depends,
    ),
    Extension(
        'mercurial.cext.bdiff',
        ['mercurial/bdiff.c', 'mercurial/cext/bdiff.c'] + xdiff_srcs,
        include_dirs=common_include_dirs,
        depends=common_depends + ['mercurial/bdiff.h'] + xdiff_headers,
    ),
    Extension(
        'mercurial.cext.mpatch',
        ['mercurial/mpatch.c', 'mercurial/cext/mpatch.c'],
        include_dirs=common_include_dirs,
        depends=common_depends,
    ),
    RustEnhancedExtension(
        'mercurial.cext.parsers',
        [
            'mercurial/cext/charencode.c',
            'mercurial/cext/dirs.c',
            'mercurial/cext/manifest.c',
            'mercurial/cext/parsers.c',
            'mercurial/cext/pathencode.c',
            'mercurial/cext/revlog.c',
        ],
        'hgdirectffi',
        'hg-direct-ffi',
        include_dirs=common_include_dirs,
        depends=common_depends
        + [
            'mercurial/cext/charencode.h',
            'mercurial/cext/revlog.h',
            'rust/hg-core/src/ancestors.rs',
            'rust/hg-core/src/lib.rs',
        ],
    ),
    Extension(
        'mercurial.cext.osutil',
        ['mercurial/cext/osutil.c'],
        include_dirs=common_include_dirs,
        extra_compile_args=osutil_cflags,
        extra_link_args=osutil_ldflags,
        depends=common_depends,
    ),
    Extension(
        'mercurial.thirdparty.zope.interface._zope_interface_coptimizations',
        [
            'mercurial/thirdparty/zope/interface/_zope_interface_coptimizations.c',
        ],
    ),
    Extension(
        'hgext.fsmonitor.pywatchman.bser', ['hgext/fsmonitor/pywatchman/bser.c']
    ),
    RustStandaloneExtension(
        'mercurial.rustext', 'hg-cpython', 'librusthg', py3_features='python3'
    ),
]


sys.path.insert(0, 'contrib/python-zstandard')
import setup_zstd

extmodules.append(
    setup_zstd.get_c_extension(
        name='mercurial.zstd', root=os.path.abspath(os.path.dirname(__file__))
    )
)

try:
    from distutils import cygwinccompiler

    # the -mno-cygwin option has been deprecated for years

    # distributions like the ones from the optware project for Synology
    # DiskStation boxes
    class HackedMingw32CCompiler(object):
        pass


if os.name == 'nt':
    # Allow compiler/linker flags to be added to Visual Studio builds.  Passing
    # extra_link_args to distutils.extensions.Extension() doesn't have any
    # effect.
    from distutils import msvccompiler

            self.ldflags_shared.append('/ignore:4197')
            self.ldflags_shared_debug.append('/ignore:4197')

    msvccompiler.MSVCCompiler = HackedMSVCCompiler

packagedata = {
    'mercurial': [
        'locale/*/LC_MESSAGES/hg.mo',
        'help/*.txt',
        'help/internals/*.txt',
        'default.d/*.rc',
        'dummycert.pem',
    ]
}


def ordinarypath(p):
    return p and p[0] != '.' and p[-1] != '~'


for root in ('templates',):
    for curdir, dirs, files in os.walk(os.path.join('mercurial', root)):
        curdir = curdir.split(os.sep, 1)[1]
        dirs[:] = filter(ordinarypath, dirs)

if issetuptools:
    extra['python_requires'] = supportedpy

if py2exeloaded:
    extra['console'] = [
        {
            'script': 'hg',
            'copyright': 'Copyright (C) 2005-2019 Matt Mackall and others',
            'product_version': version,
        }
    ]
    # Sub command of 'build' because 'py2exe' does not handle sub_commands.
    # Need to override hgbuild because it has a private copy of
    # build.sub_commands.
    hgbuild.sub_commands.insert(0, ('build_hgextindex', None))
    # put dlls in sub directory so that they won't pollute PATH

    version = runcmd(['/usr/bin/xcodebuild', '-version'], {})[1].splitlines()
    if version:
        version = version[0]
        if sys.version_info[0] == 3:
            version = version.decode('utf-8')
        xcode4 = version.startswith('Xcode') and StrictVersion(
            version.split()[1]
        ) >= StrictVersion('4.0')
        xcode51 = re.match(r'^Xcode\s+5\.1', version) is not None
    else:
        # xcodebuild returns empty on OS X Lion with XCode 4.3 not
        # installed, but instead with only command-line tools. Assume
        # that only happens on >= Lion, thus no PPC support.

    # so Mercurial can continue to compile in the meantime.
    if xcode51:
        cflags = get_config_var('CFLAGS')
        if cflags and re.search(r'-mno-fused-madd\b', cflags) is not None:
            os.environ['CFLAGS'] = (
                os.environ.get('CFLAGS', '') + ' -Qunused-arguments'
            )

setup(
    name='mercurial',
    version=setupversion,
    author='Matt Mackall and many others',
    author_email='[e-mail]',
    url='https://mercurial-scm.org/',
    download_url='https://mercurial-scm.org/release/',
    description=(
        'Fast scalable distributed SCM (revision control, version '
        'control) system'
    ),
    long_description=(
        'Mercurial is a distributed SCM tool written in Python.'
        ' It is used by a number of large projects that require'
        ' fast, reliable distributed revision control, such as '
        'Mozilla.'
    ),
    license='GNU GPLv2 or any later version',
    classifiers=[
        'Development Status :: 6 - Mature',
        'Environment :: Console',
        'Intended Audience :: Developers',
        'Intended Audience :: System Administrators',
        'License :: OSI Approved :: GNU General Public License (GPL)',
        'Natural Language :: Danish',
        'Natural Language :: English',
        'Natural Language :: German',
        'Natural Language :: Italian',
        'Natural Language :: Japanese',
        'Natural Language :: Portuguese (Brazilian)',
        'Operating System :: Microsoft :: Windows',
        'Operating System :: OS Independent',
        'Operating System :: POSIX',
        'Programming Language :: C',
        'Programming Language :: Python',
        'Topic :: Software Development :: Version Control',
    ],
    scripts=scripts,
    packages=packages,
    ext_modules=extmodules,
    data_files=datafiles,
    package_data=packagedata,
    cmdclass=cmdclass,
    distclass=hgdist,
    options={
        'py2exe': {
            'bundle_files': 3,
            'dll_excludes': py2exedllexcludes,
            'excludes': py2exeexcludes,
            'packages': py2exepackages,
        },
        'bdist_mpkg': {
            'zipdist': False,
            'license': 'COPYING',
            'readme': 'contrib/packaging/macosx/Readme.html',
            'welcome': 'contrib/packaging/macosx/Welcome.html',
        },
    },
    **extra
)