setup.py

# setup.py - distutils packaging
#
# Copyright (C) 2003-2010 Federico Di Gregorio  <fog@debian.org>
#
# psycopg2 is free software: you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# psycopg2 is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
# License for more details.

"""Python-PostgreSQL Database Adapter

psycopg2 is a PostgreSQL database adapter for the Python programming
language.  psycopg2 was written with the aim of being very small and fast,
and stable as a rock.

psycopg2 is different from the other database adapter because it was
designed for heavily multi-threaded applications that create and destroy
lots of cursors and make a conspicuous number of concurrent INSERTs or
UPDATEs. psycopg2 also provide full asynchronous operations and support
for coroutine libraries.
"""

# note: if you are changing the list of supported Python version please fix
# the docs in install.rst and the /features/ page on the website.
classifiers = """\
Development Status :: 1 - Experimental
Intended Audience :: Developers
License :: OSI Approved :: GNU Library or Lesser General Public License (LGPL)
Programming Language :: Python
Programming Language :: Python :: 2.7
Programming Language :: C
Programming Language :: SQL
Topic :: Database
Topic :: Database :: Front-Ends
Topic :: Software Development
Topic :: Software Development :: Libraries :: Python Modules
Operating System :: Unix
"""

# Note: The setup.py must be compatible with both Python 2 and 3

import os
import sys
import re
import subprocess
from distutils.core import setup, Extension
from distutils.command.build_ext import build_ext
from distutils.sysconfig import get_python_inc
from distutils.ccompiler import get_default_compiler
from distutils.util import get_platform

from distutils.command.build_py import build_py

try:
    import configparser
except ImportError:
    import ConfigParser as configparser

PYLD_VERSION = '0.1.dev0'
version_flags   = ['dt', 'dec']


class PostgresConfig:
    def __init__(self, build_ext):
        self.build_ext = build_ext
        self.pg_config_exe = self.build_ext.pg_config
        if not self.pg_config_exe:
            self.pg_config_exe = self.autodetect_pg_config_path()
        if self.pg_config_exe is None:
            sys.stderr.write("""\
Error: pg_config executable not found.

Please add the directory containing pg_config to the PATH
or specify the full executable path with the option:

    python setup.py build_ext --pg-config /path/to/pg_config build ...

or with the pg_config option in 'setup.cfg'.
""")
            sys.exit(1)

    def query(self, attr_name):
        """Spawn the pg_config executable, querying for the given config
        name, and return the printed value, sanitized. """
        try:
            pg_config_process = subprocess.Popen(
                [self.pg_config_exe, "--" + attr_name],
                stdin=subprocess.PIPE,
                stdout=subprocess.PIPE,
                stderr=subprocess.PIPE)
        except OSError:
            raise Warning("Unable to find 'pg_config' file in '%s'" %
                          self.pg_config_exe)
        pg_config_process.stdin.close()
        result = pg_config_process.stdout.readline().strip()
        if not result:
            raise Warning(pg_config_process.stderr.readline())
        if not isinstance(result, str):
            result = result.decode('ascii')
        return result

    def find_on_path(self, exename, path_directories=None):
        if not path_directories:
            path_directories = os.environ['PATH'].split(os.pathsep)
        for dir_name in path_directories:
            fullpath = os.path.join(dir_name, exename)
            if os.path.isfile(fullpath):
                return fullpath
        return None

    def autodetect_pg_config_path(self):
        """Find and return the path to the pg_config executable."""
        return self.find_on_path('pg_config')

    def _get_pg_config_from_registry(self):
        try:
            import winreg
        except ImportError:
            import _winreg as winreg

        reg = winreg.ConnectRegistry(None, winreg.HKEY_LOCAL_MACHINE)
        try:
            pg_inst_list_key = winreg.OpenKey(reg,
                'SOFTWARE\\PostgreSQL\\Installations')
        except EnvironmentError:
            # No PostgreSQL installation, as best as we can tell.
            return None

        try:
            # Determine the name of the first subkey, if any:
            try:
                first_sub_key_name = winreg.EnumKey(pg_inst_list_key, 0)
            except EnvironmentError:
                return None

            pg_first_inst_key = winreg.OpenKey(reg,
                'SOFTWARE\\PostgreSQL\\Installations\\'
                + first_sub_key_name)
            try:
                pg_inst_base_dir = winreg.QueryValueEx(
                    pg_first_inst_key, 'Base Directory')[0]
            finally:
                winreg.CloseKey(pg_first_inst_key)

        finally:
            winreg.CloseKey(pg_inst_list_key)

        pg_config_path = os.path.join(
            pg_inst_base_dir, 'bin', 'pg_config.exe')
        if not os.path.exists(pg_config_path):
            return None

        # Support unicode paths, if this version of Python provides the
        # necessary infrastructure:
        if sys.version_info[0] < 3 \
        and hasattr(sys, 'getfilesystemencoding'):
            pg_config_path = pg_config_path.encode(
                sys.getfilesystemencoding())

        return pg_config_path


class pyld_build_ext(build_ext):
    """Conditionally complement the setup.cfg options file.

    This class configures the include_dirs, library_dirs, libraries
    options as required by the system. Most of the configuration happens
    in finalize_options() method.

    If you want to set up the build step for a peculiar platform, add a
    method finalize_PLAT(), where PLAT matches your sys.platform.
    """
    user_options = build_ext.user_options[:]
    user_options.extend([
        ('use-pydatetime', None,
         "Use Python datatime objects for date and time representation."),
        ('pg-config=', None,
          "The name of the pg_config binary and/or full path to find it"),
        ('static-libpq', None,
         "Statically link the PostgreSQL client library"),
    ])

    boolean_options = build_ext.boolean_options[:]
    boolean_options.extend(('use-pydatetime', 'have-ssl', 'static-libpq'))

    def __init__(self, *args, **kwargs):
        build_ext.__init__(self, *args, **kwargs)

    def initialize_options(self):
        build_ext.initialize_options(self)
        self.use_pg_dll = 1
        self.pgdir = None
        self.mx_include_dir = None
        self.use_pydatetime = 1
        self.have_ssl = have_ssl
        self.static_libpq = static_libpq
        self.pg_config = None

    def compiler_is_msvc(self):
        return self.get_compiler_name().lower().startswith('msvc')

    def compiler_is_mingw(self):
        return self.get_compiler_name().lower().startswith('mingw')

    def get_compiler_name(self):
        """Return the name of the C compiler used to compile extensions.

        If a compiler was not explicitly set (on the command line, for
        example), fall back on the default compiler.
        """
        if self.compiler:
            # distutils doesn't keep the type of self.compiler uniform; we
            # compensate:
            if isinstance(self.compiler, str):
                name = self.compiler
            else:
                name = self.compiler.compiler_type
        else:
            name = get_default_compiler()
        return name

    def get_export_symbols(self, extension):
        # Fix MSVC seeing two of the same export symbols.
        if self.compiler_is_msvc():
            return []
        else:
            return build_ext.get_export_symbols(self, extension)

    def build_extension(self, extension):
        build_ext.build_extension(self, extension)
        sysVer = sys.version_info[:2]

        # For Python versions that use MSVC compiler 2008, re-insert the
        # manifest into the resulting .pyd file.
        if self.compiler_is_msvc() and sysVer not in ((2, 4), (2, 5)):
            platform = get_platform()
            # Default to the x86 manifest
            manifest = '_psycopg.vc9.x86.manifest'
            if platform == 'win-amd64':
                manifest = '_psycopg.vc9.amd64.manifest'
            try:
                ext_path = self.get_ext_fullpath(extension.name)
            except AttributeError:
                ext_path = os.path.join(self.build_lib,
                        'psycopg2', '_psycopg.pyd')
            self.compiler.spawn(
                ['mt.exe', '-nologo', '-manifest',
                 os.path.join('psycopg', manifest),
                 '-outputresource:%s;2' % ext_path])

    def finalize_win32(self):
        """Finalize build system configuration on win32 platform."""
        sysVer = sys.version_info[:2]

        # Add compiler-specific arguments:
        extra_compiler_args = []

        if self.compiler_is_mingw():
            # Default MinGW compilation of Python extensions on Windows uses
            # only -O:
            extra_compiler_args.append('-O3')

            # GCC-compiled Python on non-Windows platforms is built with strict
            # aliasing disabled, but that must be done explicitly on Windows to
            # avoid large numbers of warnings for perfectly idiomatic Python C
            # API code.
            extra_compiler_args.append('-fno-strict-aliasing')

            # Force correct C runtime library linkage:
            if sysVer <= (2, 3):
                # Yes:  'msvcr60', rather than 'msvcrt', is the correct value
                # on the line below:
                self.libraries.append('msvcr60')
            elif sysVer in ((2, 4), (2, 5)):
                self.libraries.append('msvcr71')
            # Beyond Python 2.5, we take our chances on the default C runtime
            # library, because we don't know what compiler those future
            # versions of Python will use.

        for extension in ext:  # ext is a global list of Extension objects
            extension.extra_compile_args.extend(extra_compiler_args)
        # End of add-compiler-specific arguments section.

        self.libraries.append("ws2_32")
        self.libraries.append("advapi32")
        if self.compiler_is_msvc():
            # MSVC requires an explicit "libpq"
            self.libraries.remove("pq")
            self.libraries.append("secur32")
            self.libraries.append("libpq")
            self.libraries.append("shfolder")
            for path in self.library_dirs:
                if os.path.isfile(os.path.join(path, "ms", "libpq.lib")):
                    self.library_dirs.append(os.path.join(path, "ms"))
                    break
            if self.have_ssl:
                self.libraries.append("libeay32")
                self.libraries.append("ssleay32")
                self.libraries.append("crypt32")
                self.libraries.append("user32")
                self.libraries.append("gdi32")

    def finalize_darwin(self):
        """Finalize build system configuration on darwin platform."""
        self.libraries.append('ssl')
        self.libraries.append('crypto')

    def finalize_linux(self):
        """Finalize build system configuration on GNU/Linux platform."""
        # tell piro that GCC is fine and dandy, but not so MS compilers
        for extension in self.extensions:
            extension.extra_compile_args.append(
                '-Wdeclaration-after-statement')

    finalize_linux2 = finalize_linux
    finalize_linux3 = finalize_linux

    def finalize_options(self):
        """Complete the build system configuration."""
        build_ext.finalize_options(self)

        pg_config_helper = PostgresConfig(self)

        self.include_dirs.append(".")
        if self.static_libpq:
            if not getattr(self, 'link_objects', None):
                self.link_objects = []
            self.link_objects.append(
                    os.path.join(pg_config_helper.query("libdir"), "libpq.a"))
        else:
            self.libraries.append("pq")

        try:
            self.library_dirs.append(pg_config_helper.query("libdir"))
            self.include_dirs.append(pg_config_helper.query("includedir"))
            self.include_dirs.append(pg_config_helper.query("includedir-server"))
            try:
                # Here we take a conservative approach: we suppose that
                # *at least* PostgreSQL 7.4 is available (this is the only
                # 7.x series supported by psycopg 2)
                pgversion = pg_config_helper.query("version").split()[1]
            except:
                pgversion = "7.4.0"

            verre = re.compile(
                r"(\d+)\.(\d+)(?:(?:\.(\d+))|(devel|(alpha|beta|rc)\d+))")
            m = verre.match(pgversion)
            if m:
                pgmajor, pgminor, pgpatch = m.group(1, 2, 3)
                if pgpatch is None or not pgpatch.isdigit():
                    pgpatch = 0
                pgmajor = int(pgmajor)
                pgminor = int(pgminor)
                pgpatch = int(pgpatch)
            else:
                sys.stderr.write(
                    "Error: could not determine PostgreSQL version from '%s'"
                                                                % pgversion)
                sys.exit(1)

            define_macros.append(("PG_VERSION_HEX", "0x%02X%02X%02X" %
                                  (pgmajor, pgminor, pgpatch)))

            # enable lo64 if libpq >= 9.3 and Python 64 bits
            if (pgmajor, pgminor) >= (9, 3) and is_py_64():
                define_macros.append(("HAVE_LO64", "1"))

                # Inject the flag in the version string already packed up
                # because we didn't know the version before.
                # With distutils everything is complicated.
                for i, t in enumerate(define_macros):
                    if t[0] == 'PSYCOPG_VERSION':
                        n = t[1].find(')')
                        if n > 0:
                            define_macros[i] = (
                                t[0], t[1][:n] + ' lo64' + t[1][n:])

        except Warning:
            w = sys.exc_info()[1]  # work around py 2/3 different syntax
            sys.stderr.write("Error: %s\n" % w)
            sys.exit(1)

        if hasattr(self, "finalize_" + sys.platform):
            getattr(self, "finalize_" + sys.platform)()

def is_py_64():
    # sys.maxint not available since Py 3.1;
    # sys.maxsize not available before Py 2.6;
    # this is portable at least between Py 2.4 and 3.4.
    import struct
    return struct.calcsize("P") > 4


# let's start with macro definitions (the ones not already in setup.cfg)
define_macros = []
include_dirs = []

# gather information to build the extension module
ext = []
data_files = []

# sources

sources = [
    'logicaldecodingmodule.c',
    "connection.c",
    'reader_type.c',
]

depends = [
    "python.h",
    "connection.h",
    "pylogicaldecoding.h",
]

parser = configparser.ConfigParser()
parser.read('setup.cfg')

# Choose a datetime module
have_pydatetime = True
have_mxdatetime = False
use_pydatetime  = int(parser.get('build_ext', 'use_pydatetime'))

# check for mx package
if parser.has_option('build_ext', 'mx_include_dir'):
    mxincludedir = parser.get('build_ext', 'mx_include_dir')
else:
    mxincludedir = os.path.join(get_python_inc(plat_specific=1), "mx")
if os.path.exists(mxincludedir):
    # Build the support for mx: we will check at runtime if it can be imported
    include_dirs.append(mxincludedir)
    define_macros.append(('HAVE_MXDATETIME', '1'))
    sources.append('adapter_mxdatetime.c')
    depends.extend(['adapter_mxdatetime.h', 'typecast_mxdatetime.c'])
    have_mxdatetime = True
    version_flags.append('mx')

# now decide which package will be the default for date/time typecasts
if have_pydatetime and (use_pydatetime or not have_mxdatetime):
    define_macros.append(('PYLD_DEFAULT_PYDATETIME', '1'))
elif have_mxdatetime:
    define_macros.append(('PYLD_DEFAULT_MXDATETIME', '1'))
else:
    error_message = """\
psycopg requires a datetime module:
    mx.DateTime module not found
    python datetime module not found

Note that psycopg needs the module headers and not just the module
itself. If you installed Python or mx.DateTime from a binary package
you probably need to install its companion -dev or -devel package."""

    for line in error_message.split("\n"):
        sys.stderr.write("error: " + line)
    sys.exit(1)

# generate a nice version string to avoid confusion when users report bugs
version_flags.append('pq3') # no more a choice
version_flags.append('ext') # no more a choice

if version_flags:
    PYLD_VERSION_EX = PYLD_VERSION + " (%s)" % ' '.join(version_flags)
else:
    PYLD_VERSION_EX = PYLD_VERSION

#define_macros.append(('PYLD_VERSION', '\\"' + PYLD_VERSION_EX + '\\"'))

if parser.has_option('build_ext', 'have_ssl'):
    have_ssl = int(parser.get('build_ext', 'have_ssl'))
else:
    have_ssl = 0

if parser.has_option('build_ext', 'static_libpq'):
    static_libpq = int(parser.get('build_ext', 'static_libpq'))
else:
    static_libpq = 0

# And now... explicitly add the defines from the .cfg files.
# Looks like setuptools or some other cog doesn't add them to the command line
# when called e.g. with "pip -e git+url'. This results in declarations
# duplicate on the commandline, which I hope is not a problem.
for define in parser.get('build_ext', 'define').split(','):
    if define:
        define_macros.append((define, '1'))

# build the extension

sources = [ os.path.join('logicaldecoding', x) for x in sources]
depends = [ os.path.join('logicaldecoding', x) for x in depends]

ext.append(Extension("logicaldecoding._logicaldecoding", sources,
                     define_macros=define_macros,
                     libraries=['pghx'],
                     include_dirs=include_dirs,
                     depends=depends,
                     undef_macros=[]))

try:
    f = open("README.rst")
    readme = f.read()
    f.close()
except:
    print("failed to read readme: ignoring...")
    readme = __doc__

setup(name="pslogicaldecoding",
      version=PYLD_VERSION,
      maintainer="Bruno Dupuis",
      maintainer_email="bd@lisael.org",
      author="Federico Di Gregorio",
      author_email="fog@initd.org",
      url="http://initd.org/psycopg/",
      #download_url=download_url,
      license="LGPL with exceptions",
      platforms=["Unix"],
      description=readme.split("\n")[0],
      long_description="\n".join(readme.split("\n")[2:]).lstrip(),
      classifiers=[x for x in classifiers.split("\n") if x],
      data_files=data_files,
      package_dir={'logicaldecoding': 'lib', 'logicaldecoding.tests': 'tests'},
      packages=['logicaldecoding', 'logicaldecoding.tests'],
      cmdclass={
          'build_ext': pyld_build_ext,
          'build_py': build_py, },
      ext_modules=ext)