{ stdenv, fetchurl, fetchpatch
, bzip2
, expat
, libffi
, gdbm
, db
, ncurses
, openssl
, readline
, sqlite
, tcl ? null, tk ? null, tix ? null, xlibsWrapper ? null, libX11 ? null, x11Support ? false
, zlib
, self
, configd, coreutils
, autoreconfHook
, python-setup-hook
# Some proprietary libs assume UCS2 unicode, especially on darwin :(
, ucsEncoding ? 4
# For the Python package set
, packageOverrides ? (self: super: {})
, pkgsBuildBuild
, pkgsBuildHost
, pkgsBuildTarget
, pkgsHostHost
, pkgsTargetTarget
, sourceVersion
, sha256
, passthruFun
, static ? false
, enableOptimizations ? (!stdenv.isDarwin)
, pythonAttr ? "python${sourceVersion.major}${sourceVersion.minor}"
}:
assert x11Support -> tcl != null
&& tk != null
&& xlibsWrapper != null
&& libX11 != null;
with stdenv.lib;
let
buildPackages = pkgsBuildHost;
inherit (passthru) pythonForBuild;
passthru = passthruFun rec {
inherit self sourceVersion packageOverrides;
implementation = "cpython";
libPrefix = "python${pythonVersion}";
executable = libPrefix;
pythonVersion = with sourceVersion; "${major}.${minor}";
sitePackages = "lib/${libPrefix}/site-packages";
inherit hasDistutilsCxxPatch;
pythonOnBuildForBuild = pkgsBuildBuild.${pythonAttr};
pythonOnBuildForHost = pkgsBuildHost.${pythonAttr};
pythonOnBuildForTarget = pkgsBuildTarget.${pythonAttr};
pythonOnHostForHost = pkgsHostHost.${pythonAttr};
pythonOnTargetForTarget = pkgsTargetTarget.${pythonAttr} or {};
} // {
inherit ucsEncoding;
};
version = with sourceVersion; "${major}.${minor}.${patch}${suffix}";
src = fetchurl {
url = with sourceVersion; "https://www.python.org/ftp/python/${major}.${minor}.${patch}/Python-${version}.tar.xz";
inherit sha256;
};
hasDistutilsCxxPatch = !(stdenv.cc.isGNU or false);
patches =
[ # Look in C_INCLUDE_PATH and LIBRARY_PATH for stuff.
./search-path.patch
# Python recompiles a Python if the mtime stored *in* the
# pyc/pyo file differs from the mtime of the source file. This
# doesn't work in Nix because Nix changes the mtime of files in
# the Nix store to 1. So treat that as a special case.
./nix-store-mtime.patch
# patch python to put zero timestamp into pyc
# if DETERMINISTIC_BUILD env var is set
./deterministic-build.patch
# Fix python bug #27177 (https://bugs.python.org/issue27177)
# The issue is that `match.group` only recognizes python integers
# instead of everything that has `__index__`.
# This bug was fixed upstream, but not backported to 2.7
(fetchpatch {
name = "re_match_index.patch";
url = "https://bugs.python.org/file43084/re_match_index.patch";
sha256 = "0l9rw6r5r90iybdkp3hhl2pf0h0s1izc68h5d3ywrm92pq32wz57";
})
# Fix race-condition during pyc creation. Has a slight backwards
# incompatible effect: pyc symlinks will now be overridden
# (https://bugs.python.org/issue17222). Included in python >= 3.4,
# backported in debian since 2013.
# https://bugs.python.org/issue13146
./atomic_pyc.patch
# Backport from CPython 3.8 of a good list of tests to run for PGO.
./profile-task.patch
# Patch is likely to go away in the next release (if there is any)
./CVE-2019-20907.patch
] ++ optionals (x11Support && stdenv.isDarwin) [
./use-correct-tcl-tk-on-darwin.patch
] ++ optionals stdenv.isLinux [
# Disable the use of ldconfig in ctypes.util.find_library (since
# ldconfig doesn't work on NixOS), and don't use
# ctypes.util.find_library during the loading of the uuid module
# (since it will do a futile invocation of gcc (!) to find
# libuuid, slowing down program startup a lot).
./no-ldconfig.patch
] ++ optionals stdenv.hostPlatform.isCygwin [
./2.5.2-ctypes-util-find_library.patch
./2.5.2-tkinter-x11.patch
./2.6.2-ssl-threads.patch
./2.6.5-export-PySignal_SetWakeupFd.patch
./2.6.5-FD_SETSIZE.patch
./2.6.5-ncurses-abi6.patch
./2.7.3-dbm.patch
./2.7.3-dylib.patch
./2.7.3-getpath-exe-extension.patch
./2.7.3-no-libm.patch
] ++ optionals hasDistutilsCxxPatch [
# Patch from http://bugs.python.org/issue1222585 adapted to work with
# `patch -p1' and with a last hunk removed
# Upstream distutils is calling C compiler to compile C++ code, which
# only works for GCC and Apple Clang. This makes distutils to call C++
# compiler when needed.
./python-2.7-distutils-C++.patch
] ++ optional (stdenv.hostPlatform != stdenv.buildPlatform) [
./cross-compile.patch
];
preConfigure = ''
# Purity.
for i in /usr /sw /opt /pkg; do
substituteInPlace ./setup.py --replace $i /no-such-path
done
'' + optionalString (stdenv ? cc && stdenv.cc.libc != null) ''
for i in Lib/plat-*/regen; do
substituteInPlace $i --replace /usr/include/ ${stdenv.cc.libc}/include/
done
'' + optionalString stdenv.isDarwin ''
substituteInPlace configure --replace '`/usr/bin/arch`' '"i386"'
substituteInPlace Lib/multiprocessing/__init__.py \
--replace 'os.popen(comm)' 'os.popen("${coreutils}/bin/nproc")'
'';
configureFlags = optionals enableOptimizations [
"--enable-optimizations"
] ++ [
"--enable-shared"
"--with-threads"
"--enable-unicode=ucs${toString ucsEncoding}"
] ++ optionals (stdenv.hostPlatform.isCygwin || stdenv.hostPlatform.isAarch64) [
"--with-system-ffi"
] ++ optionals stdenv.hostPlatform.isCygwin [
"--with-system-expat"
"ac_cv_func_bind_textdomain_codeset=yes"
] ++ optionals stdenv.isDarwin [
"--disable-toolbox-glue"
] ++ optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
"PYTHON_FOR_BUILD=${getBin buildPackages.python}/bin/python"
"ac_cv_buggy_getaddrinfo=no"
# Assume little-endian IEEE 754 floating point when cross compiling
"ac_cv_little_endian_double=yes"
"ac_cv_big_endian_double=no"
"ac_cv_mixed_endian_double=no"
"ac_cv_x87_double_rounding=yes"
"ac_cv_tanh_preserves_zero_sign=yes"
# Generally assume that things are present and work
"ac_cv_posix_semaphores_enabled=yes"
"ac_cv_broken_sem_getvalue=no"
"ac_cv_wchar_t_signed=yes"
"ac_cv_rshift_extends_sign=yes"
"ac_cv_broken_nice=no"
"ac_cv_broken_poll=no"
"ac_cv_working_tzset=yes"
"ac_cv_have_long_long_format=yes"
"ac_cv_have_size_t_format=yes"
"ac_cv_computed_gotos=yes"
"ac_cv_file__dev_ptmx=yes"
"ac_cv_file__dev_ptc=yes"
]
# Never even try to use lchmod on linux,
# don't rely on detecting glibc-isms.
++ optional stdenv.hostPlatform.isLinux "ac_cv_func_lchmod=no"
++ optional static "LDFLAGS=-static";
buildInputs =
optional (stdenv ? cc && stdenv.cc.libc != null) stdenv.cc.libc ++
[ bzip2 openssl zlib ]
++ optional (stdenv.hostPlatform.isCygwin || stdenv.hostPlatform.isAarch64) libffi
++ optional stdenv.hostPlatform.isCygwin expat
++ [ db gdbm ncurses sqlite readline ]
++ optionals x11Support [ tcl tk xlibsWrapper libX11 ]
++ optional (stdenv.isDarwin && configd != null) configd;
nativeBuildInputs =
[ autoreconfHook ]
++ optionals (stdenv.hostPlatform != stdenv.buildPlatform)
[ buildPackages.stdenv.cc buildPackages.python ];
mkPaths = paths: {
C_INCLUDE_PATH = makeSearchPathOutput "dev" "include" paths;
LIBRARY_PATH = makeLibraryPath paths;
};
# Python 2.7 needs this
crossCompileEnv = stdenv.lib.optionalAttrs (stdenv.hostPlatform != stdenv.buildPlatform)
{ _PYTHON_HOST_PLATFORM = stdenv.hostPlatform.config; };
# Build the basic Python interpreter without modules that have
# external dependencies.
in with passthru; stdenv.mkDerivation ({
pname = "python";
inherit version;
inherit src patches buildInputs nativeBuildInputs preConfigure configureFlags;
LDFLAGS = stdenv.lib.optionalString (!stdenv.isDarwin) "-lgcc_s";
inherit (mkPaths buildInputs) C_INCLUDE_PATH LIBRARY_PATH;
NIX_CFLAGS_COMPILE = optionalString stdenv.isDarwin "-msse2"
+ optionalString stdenv.hostPlatform.isMusl " -DTHREAD_STACK_SIZE=0x100000";
DETERMINISTIC_BUILD = 1;
setupHook = python-setup-hook sitePackages;
postPatch = optionalString (x11Support && (tix != null)) ''
substituteInPlace "Lib/lib-tk/Tix.py" --replace "os.environ.get('TIX_LIBRARY')" "os.environ.get('TIX_LIBRARY') or '${tix}/lib'"
'';
postInstall =
''
# needed for some packages, especially packages that backport
# functionality to 2.x from 3.x
for item in $out/lib/${libPrefix}/test/*; do
if [[ "$item" != */test_support.py*
&& "$item" != */test/support
&& "$item" != */test/regrtest.py* ]]; then
rm -rf "$item"
else
echo $item
fi
done
touch $out/lib/${libPrefix}/test/__init__.py
ln -s $out/lib/${libPrefix}/pdb.py $out/bin/pdb
ln -s $out/lib/${libPrefix}/pdb.py $out/bin/pdb${sourceVersion.major}.${sourceVersion.minor}
ln -s $out/share/man/man1/{python2.7.1.gz,python.1.gz}
rm "$out"/lib/python*/plat-*/regen # refers to glibc.dev
# Determinism: Windows installers were not deterministic.
# We're also not interested in building Windows installers.
find "$out" -name 'wininst*.exe' | xargs -r rm -f
'' + optionalString (stdenv.hostPlatform == stdenv.buildPlatform)
''
# Determinism: rebuild all bytecode
# We exclude lib2to3 because that's Python 2 code which fails
# We rebuild three times, once for each optimization level
find $out -name "*.py" | $out/bin/python -m compileall -q -f -x "lib2to3" -i -
find $out -name "*.py" | $out/bin/python -O -m compileall -q -f -x "lib2to3" -i -
find $out -name "*.py" | $out/bin/python -OO -m compileall -q -f -x "lib2to3" -i -
'' + optionalString stdenv.hostPlatform.isCygwin ''
cp libpython2.7.dll.a $out/lib
'';
inherit passthru;
postFixup = ''
# Include a sitecustomize.py file. Note it causes an error when it's in postInstall with 2.7.
cp ${../../sitecustomize.py} $out/${sitePackages}/sitecustomize.py
'';
enableParallelBuilding = true;
doCheck = false; # expensive, and fails
meta = {
homepage = "http://python.org";
description = "A high-level dynamically-typed programming language";
longDescription = ''
Python is a remarkably powerful dynamic programming language that
is used in a wide variety of application domains. Some of its key
distinguishing features include: clear, readable syntax; strong
introspection capabilities; intuitive object orientation; natural
expression of procedural code; full modularity, supporting
hierarchical packages; exception-based error handling; and very
high level dynamic data types.
'';
license = stdenv.lib.licenses.psfl;
platforms = stdenv.lib.platforms.all;
maintainers = with stdenv.lib.maintainers; [ fridh ];
# Higher priority than Python 3.x so that `/bin/python` points to `/bin/python2`
# in case both 2 and 3 are installed.
priority = -100;
};
} // crossCompileEnv)
