505 lines
20 KiB
Nix
505 lines
20 KiB
Nix
{ lib, stdenv, fetchurl, fetchpatch
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, bzip2
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, expat
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, libffi
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, gdbm
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, xz
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, mailcap, mimetypesSupport ? true
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, ncurses
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, openssl
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, readline
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, sqlite
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, tcl ? null, tk ? null, tix ? null, libX11 ? null, xorgproto ? null, x11Support ? false
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, bluez ? null, bluezSupport ? false
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, zlib
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, tzdata ? null
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, self
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, configd
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, autoreconfHook
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, autoconf-archive
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, pkg-config
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, python-setup-hook
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, nukeReferences
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# For the Python package set
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, packageOverrides ? (self: super: {})
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, pkgsBuildBuild
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, pkgsBuildHost
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, pkgsBuildTarget
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, pkgsHostHost
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, pkgsTargetTarget
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, sourceVersion
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, sha256
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, passthruFun
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, bash
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, stripConfig ? false
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, stripIdlelib ? false
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, stripTests ? false
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, stripTkinter ? false
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, rebuildBytecode ? true
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, stripBytecode ? true
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, includeSiteCustomize ? true
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, static ? stdenv.hostPlatform.isStatic
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, enableOptimizations ? false
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# enableNoSemanticInterposition is a subset of the enableOptimizations flag that doesn't harm reproducibility.
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# clang starts supporting `-fno-sematic-interposition` with version 10
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, enableNoSemanticInterposition ? (!stdenv.cc.isClang || (stdenv.cc.isClang && lib.versionAtLeast stdenv.cc.version "10"))
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# enableLTO is a subset of the enableOptimizations flag that doesn't harm reproducibility.
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# enabling LTO on 32bit arch causes downstream packages to fail when linking
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# enabling LTO on *-darwin causes python3 to fail when linking.
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, enableLTO ? stdenv.is64bit && stdenv.isLinux
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, reproducibleBuild ? false
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, pythonAttr ? "python${sourceVersion.major}${sourceVersion.minor}"
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}:
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# Note: this package is used for bootstrapping fetchurl, and thus
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# cannot use fetchpatch! All mutable patches (generated by GitHub or
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# cgit) that are needed here should be included directly in Nixpkgs as
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# files.
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assert x11Support -> tcl != null
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&& tk != null
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&& xorgproto != null
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&& libX11 != null;
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assert bluezSupport -> bluez != null;
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assert lib.assertMsg (enableOptimizations -> (!stdenv.cc.isClang))
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"Optimizations with clang are not supported. configure: error: llvm-profdata is required for a --enable-optimizations build but could not be found.";
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assert lib.assertMsg (reproducibleBuild -> stripBytecode)
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"Deterministic builds require stripping bytecode.";
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assert lib.assertMsg (reproducibleBuild -> (!enableOptimizations))
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"Deterministic builds are not achieved when optimizations are enabled.";
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assert lib.assertMsg (reproducibleBuild -> (!rebuildBytecode))
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"Deterministic builds are not achieved when (default unoptimized) bytecode is created.";
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with lib;
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let
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buildPackages = pkgsBuildHost;
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inherit (passthru) pythonForBuild;
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tzdataSupport = tzdata != null && passthru.pythonAtLeast "3.9";
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passthru = passthruFun rec {
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inherit self sourceVersion packageOverrides;
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implementation = "cpython";
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libPrefix = "python${pythonVersion}";
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executable = libPrefix;
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pythonVersion = with sourceVersion; "${major}.${minor}";
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sitePackages = "lib/${libPrefix}/site-packages";
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inherit hasDistutilsCxxPatch;
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pythonOnBuildForBuild = pkgsBuildBuild.${pythonAttr};
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pythonOnBuildForHost = pkgsBuildHost.${pythonAttr};
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pythonOnBuildForTarget = pkgsBuildTarget.${pythonAttr};
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pythonOnHostForHost = pkgsHostHost.${pythonAttr};
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pythonOnTargetForTarget = pkgsTargetTarget.${pythonAttr} or {};
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};
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version = with sourceVersion; "${major}.${minor}.${patch}${suffix}";
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strictDeps = true;
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nativeBuildInputs = optionals (!stdenv.isDarwin) [
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autoreconfHook
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pkg-config
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autoconf-archive # needed for AX_CHECK_COMPILE_FLAG
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] ++ [
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nukeReferences
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] ++ optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
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buildPackages.stdenv.cc
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pythonForBuild
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] ++ optionals (stdenv.cc.isClang && enableLTO) [
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stdenv.cc.cc.libllvm.out
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];
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buildInputs = filter (p: p != null) ([
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zlib bzip2 expat xz libffi gdbm sqlite readline ncurses openssl ]
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++ optionals x11Support [ tcl tk libX11 xorgproto ]
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++ optionals (bluezSupport && stdenv.isLinux) [ bluez ]
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++ optionals stdenv.isDarwin [ configd ])
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++ optionals tzdataSupport [ tzdata ]; # `zoneinfo` module
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hasDistutilsCxxPatch = !(stdenv.cc.isGNU or false);
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pythonForBuildInterpreter = if stdenv.hostPlatform == stdenv.buildPlatform then
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"$out/bin/python"
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else pythonForBuild.interpreter;
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# The CPython interpreter contains a _sysconfigdata_<platform specific suffix>
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# module that is imported by the sysconfig and distutils.sysconfig modules.
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# The sysconfigdata module is generated at build time and contains settings
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# required for building Python extension modules, such as include paths and
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# other compiler flags. By default, the sysconfigdata module is loaded from
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# the currently running interpreter (ie. the build platform interpreter), but
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# when cross-compiling we want to load it from the host platform interpreter.
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# This can be done using the _PYTHON_SYSCONFIGDATA_NAME environment variable.
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# The _PYTHON_HOST_PLATFORM variable also needs to be set to get the correct
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# platform suffix on extension modules. The correct values for these variables
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# are not documented, and must be derived from the configure script (see links
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# below).
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sysconfigdataHook = with stdenv.hostPlatform; with passthru; let
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# https://github.com/python/cpython/blob/e488e300f5c01289c10906c2e53a8e43d6de32d8/configure.ac#L428
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# The configure script uses "arm" as the CPU name for all 32-bit ARM
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# variants when cross-compiling, but native builds include the version
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# suffix, so we do the same.
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pythonHostPlatform = "${parsed.kernel.name}-${parsed.cpu.name}";
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# https://github.com/python/cpython/blob/e488e300f5c01289c10906c2e53a8e43d6de32d8/configure.ac#L724
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multiarchCpu =
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if isAarch32 then
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if parsed.cpu.significantByte.name == "littleEndian" then "arm" else "armeb"
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else if isx86_32 then "i386"
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else parsed.cpu.name;
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pythonAbiName =
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# python's build doesn't differentiate between musl and glibc in its
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# abi detection, our wrapper should match.
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if stdenv.hostPlatform.isMusl then
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replaceStrings [ "musl" ] [ "gnu" ] parsed.abi.name
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else parsed.abi.name;
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multiarch =
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if isDarwin then "darwin"
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else "${multiarchCpu}-${parsed.kernel.name}-${pythonAbiName}";
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abiFlags = optionalString (isPy36 || isPy37) "m";
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# https://github.com/python/cpython/blob/e488e300f5c01289c10906c2e53a8e43d6de32d8/configure.ac#L78
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pythonSysconfigdataName = "_sysconfigdata_${abiFlags}_${parsed.kernel.name}_${multiarch}";
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in ''
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sysconfigdataHook() {
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if [ "$1" = '${placeholder "out"}' ]; then
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export _PYTHON_HOST_PLATFORM='${pythonHostPlatform}'
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export _PYTHON_SYSCONFIGDATA_NAME='${pythonSysconfigdataName}'
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fi
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}
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addEnvHooks "$hostOffset" sysconfigdataHook
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'';
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in with passthru; stdenv.mkDerivation {
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pname = "python3";
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inherit version;
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inherit buildInputs nativeBuildInputs;
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src = fetchurl {
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url = with sourceVersion; "https://www.python.org/ftp/python/${major}.${minor}.${patch}/Python-${version}.tar.xz";
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inherit sha256;
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};
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prePatch = optionalString stdenv.isDarwin ''
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substituteInPlace configure --replace '`/usr/bin/arch`' '"i386"'
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'' + optionalString (pythonOlder "3.9" && stdenv.isDarwin && x11Support) ''
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# Broken on >= 3.9; replaced with ./3.9/darwin-tcl-tk.patch
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substituteInPlace setup.py --replace /Library/Frameworks /no-such-path
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'';
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patches = [
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# Disable the use of ldconfig in ctypes.util.find_library (since
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# ldconfig doesn't work on NixOS), and don't use
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# ctypes.util.find_library during the loading of the uuid module
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# (since it will do a futile invocation of gcc (!) to find
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# libuuid, slowing down program startup a lot).
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(./. + "/${sourceVersion.major}.${sourceVersion.minor}/no-ldconfig.patch")
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# Make sure that the virtualenv activation scripts are
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# owner-writable, so venvs can be recreated without permission
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# errors.
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./virtualenv-permissions.patch
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] ++ optionals mimetypesSupport [
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# Make the mimetypes module refer to the right file
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./mimetypes.patch
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] ++ optionals (isPy35 || isPy36) [
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# Determinism: Write null timestamps when compiling python files.
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./3.5/force_bytecode_determinism.patch
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] ++ optionals isPy35 [
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# Backports support for LD_LIBRARY_PATH from 3.6
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./3.5/ld_library_path.patch
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] ++ optionals (isPy35 || isPy36 || isPy37) [
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# Backport a fix for discovering `rpmbuild` command when doing `python setup.py bdist_rpm` to 3.5, 3.6, 3.7.
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# See: https://bugs.python.org/issue11122
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./3.7/fix-hardcoded-path-checking-for-rpmbuild.patch
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# The workaround is for unittests on Win64, which we don't support.
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# It does break aarch64-darwin, which we do support. See:
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# * https://bugs.python.org/issue35523
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# * https://github.com/python/cpython/commit/e6b247c8e524
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./3.7/no-win64-workaround.patch
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] ++ optionals (pythonAtLeast "3.7") [
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# Fix darwin build https://bugs.python.org/issue34027
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./3.7/darwin-libutil.patch
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] ++ optionals (pythonOlder "3.8") [
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# Backport from CPython 3.8 of a good list of tests to run for PGO.
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(
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if isPy36 || isPy37 then
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./3.6/profile-task.patch
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else
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./3.5/profile-task.patch
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)
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] ++ optionals (pythonAtLeast "3.9" && stdenv.isDarwin) [
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# Stop checking for TCL/TK in global macOS locations
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./3.9/darwin-tcl-tk.patch
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] ++ optionals (isPy3k && hasDistutilsCxxPatch) [
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# Fix for http://bugs.python.org/issue1222585
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# Upstream distutils is calling C compiler to compile C++ code, which
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# only works for GCC and Apple Clang. This makes distutils to call C++
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# compiler when needed.
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(
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if isPy35 then
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./3.5/python-3.x-distutils-C++.patch
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else if pythonAtLeast "3.7" then
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./3.7/python-3.x-distutils-C++.patch
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else
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fetchpatch {
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url = "https://bugs.python.org/file48016/python-3.x-distutils-C++.patch";
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sha256 = "1h18lnpx539h5lfxyk379dxwr8m2raigcjixkf133l4xy3f4bzi2";
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}
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)
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] ++ [
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# LDSHARED now uses $CC instead of gcc. Fixes cross-compilation of extension modules.
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./3.8/0001-On-all-posix-systems-not-just-Darwin-set-LDSHARED-if.patch
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# Use sysconfigdata to find headers. Fixes cross-compilation of extension modules.
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(
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if isPy36 then
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./3.6/fix-finding-headers-when-cross-compiling.patch
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else
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./3.7/fix-finding-headers-when-cross-compiling.patch
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)
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] ++ optionals (isPy36) [
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# Backport a fix for ctypes.util.find_library.
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./3.6/find_library.patch
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];
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postPatch = ''
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substituteInPlace Lib/subprocess.py \
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--replace "'/bin/sh'" "'${bash}/bin/sh'"
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'' + optionalString mimetypesSupport ''
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substituteInPlace Lib/mimetypes.py \
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--replace "@mime-types@" "${mailcap}"
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'' + optionalString (x11Support && (tix != null)) ''
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substituteInPlace "Lib/tkinter/tix.py" --replace "os.environ.get('TIX_LIBRARY')" "os.environ.get('TIX_LIBRARY') or '${tix}/lib'"
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'';
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CPPFLAGS = concatStringsSep " " (map (p: "-I${getDev p}/include") buildInputs);
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LDFLAGS = concatStringsSep " " (map (p: "-L${getLib p}/lib") buildInputs);
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LIBS = "${optionalString (!stdenv.isDarwin) "-lcrypt"} ${optionalString (ncurses != null) "-lncurses"}";
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NIX_LDFLAGS = lib.optionalString stdenv.cc.isGNU ({
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"glibc" = "-lgcc_s";
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"musl" = "-lgcc_eh";
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}."${stdenv.hostPlatform.libc}" or "");
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# Determinism: We fix the hashes of str, bytes and datetime objects.
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PYTHONHASHSEED=0;
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configureFlags = [
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"--without-ensurepip"
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"--with-system-expat"
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"--with-system-ffi"
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] ++ optionals (!static) [
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"--enable-shared"
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] ++ optionals enableOptimizations [
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"--enable-optimizations"
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] ++ optionals enableLTO [
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"--with-lto"
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] ++ optionals (pythonOlder "3.7") [
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# This is unconditionally true starting in CPython 3.7.
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"--with-threads"
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] ++ optionals (sqlite != null && isPy3k) [
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"--enable-loadable-sqlite-extensions"
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] ++ optionals (openssl != null) [
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"--with-openssl=${openssl.dev}"
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] ++ optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
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"ac_cv_buggy_getaddrinfo=no"
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# Assume little-endian IEEE 754 floating point when cross compiling
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"ac_cv_little_endian_double=yes"
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"ac_cv_big_endian_double=no"
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"ac_cv_mixed_endian_double=no"
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"ac_cv_x87_double_rounding=yes"
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"ac_cv_tanh_preserves_zero_sign=yes"
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# Generally assume that things are present and work
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"ac_cv_posix_semaphores_enabled=yes"
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"ac_cv_broken_sem_getvalue=no"
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"ac_cv_wchar_t_signed=yes"
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"ac_cv_rshift_extends_sign=yes"
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"ac_cv_broken_nice=no"
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"ac_cv_broken_poll=no"
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"ac_cv_working_tzset=yes"
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"ac_cv_have_long_long_format=yes"
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"ac_cv_have_size_t_format=yes"
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"ac_cv_computed_gotos=yes"
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"ac_cv_file__dev_ptmx=yes"
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"ac_cv_file__dev_ptc=yes"
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] ++ optionals stdenv.hostPlatform.isLinux [
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# Never even try to use lchmod on linux,
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# don't rely on detecting glibc-isms.
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"ac_cv_func_lchmod=no"
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] ++ optionals tzdataSupport [
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"--with-tzpath=${tzdata}/share/zoneinfo"
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] ++ optional static "LDFLAGS=-static";
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preConfigure = ''
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for i in /usr /sw /opt /pkg; do # improve purity
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substituteInPlace ./setup.py --replace $i /no-such-path
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done
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'' + optionalString stdenv.isDarwin ''
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# Override the auto-detection in setup.py, which assumes a universal build
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export PYTHON_DECIMAL_WITH_MACHINE=${if stdenv.isAarch64 then "uint128" else "x64"}
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'' + optionalString (isPy3k && pythonOlder "3.7") ''
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# Determinism: The interpreter is patched to write null timestamps when compiling Python files
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# so Python doesn't try to update the bytecode when seeing frozen timestamps in Nix's store.
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export DETERMINISTIC_BUILD=1;
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'' + optionalString stdenv.hostPlatform.isMusl ''
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export NIX_CFLAGS_COMPILE+=" -DTHREAD_STACK_SIZE=0x100000"
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'' +
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# enableNoSemanticInterposition essentially sets that CFLAG -fno-semantic-interposition
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# which changes how symbols are looked up. This essentially means we can't override
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# libpython symbols via LD_PRELOAD anymore. This is common enough as every build
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# that uses --enable-optimizations has the same "issue".
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#
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# The Fedora wiki has a good article about their journey towards enabling this flag:
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# https://fedoraproject.org/wiki/Changes/PythonNoSemanticInterpositionSpeedup
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optionalString enableNoSemanticInterposition ''
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export CFLAGS_NODIST="-fno-semantic-interposition"
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'';
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setupHook = python-setup-hook sitePackages;
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postInstall = let
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# References *not* to nuke from (sys)config files
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keep-references = concatMapStringsSep " " (val: "-e ${val}") ([
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(placeholder "out")
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] ++ optionals tzdataSupport [
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tzdata
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]);
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in ''
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# needed for some packages, especially packages that backport functionality
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# to 2.x from 3.x
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for item in $out/lib/${libPrefix}/test/*; do
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if [[ "$item" != */test_support.py*
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&& "$item" != */test/support
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&& "$item" != */test/libregrtest
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&& "$item" != */test/regrtest.py* ]]; then
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rm -rf "$item"
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else
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echo $item
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fi
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done
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touch $out/lib/${libPrefix}/test/__init__.py
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ln -s "$out/include/${executable}m" "$out/include/${executable}"
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# Determinism: Windows installers were not deterministic.
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# We're also not interested in building Windows installers.
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find "$out" -name 'wininst*.exe' | xargs -r rm -f
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# Use Python3 as default python
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ln -s "$out/bin/idle3" "$out/bin/idle"
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ln -s "$out/bin/pydoc3" "$out/bin/pydoc"
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ln -s "$out/bin/python3" "$out/bin/python"
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ln -s "$out/bin/python3-config" "$out/bin/python-config"
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ln -s "$out/lib/pkgconfig/python3.pc" "$out/lib/pkgconfig/python.pc"
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# Get rid of retained dependencies on -dev packages, and remove
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# some $TMPDIR references to improve binary reproducibility.
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# Note that the .pyc file of _sysconfigdata.py should be regenerated!
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for i in $out/lib/${libPrefix}/_sysconfigdata*.py $out/lib/${libPrefix}/config-${sourceVersion.major}${sourceVersion.minor}*/Makefile; do
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sed -i $i -e "s|$TMPDIR|/no-such-path|g"
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done
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# Further get rid of references. https://github.com/NixOS/nixpkgs/issues/51668
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find $out/lib/python*/config-* -type f -print -exec nuke-refs ${keep-references} '{}' +
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find $out/lib -name '_sysconfigdata*.py*' -print -exec nuke-refs ${keep-references} '{}' +
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# Make the sysconfigdata module accessible on PYTHONPATH
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# This allows build Python to import host Python's sysconfigdata
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mkdir -p "$out/${sitePackages}"
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ln -s "$out/lib/${libPrefix}/"_sysconfigdata*.py "$out/${sitePackages}/"
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# debug info can't be separated from a static library and would otherwise be
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|
# left in place by a separateDebugInfo build. force its removal here to save
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# space in output.
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|
$STRIP -S $out/lib/${libPrefix}/config-*/libpython*.a || true
|
|
'' + optionalString stripConfig ''
|
|
rm -R $out/bin/python*-config $out/lib/python*/config-*
|
|
'' + optionalString stripIdlelib ''
|
|
# Strip IDLE (and turtledemo, which uses it)
|
|
rm -R $out/bin/idle* $out/lib/python*/{idlelib,turtledemo}
|
|
'' + optionalString stripTkinter ''
|
|
rm -R $out/lib/python*/tkinter
|
|
'' + optionalString stripTests ''
|
|
# Strip tests
|
|
rm -R $out/lib/python*/test $out/lib/python*/**/test{,s}
|
|
'' + optionalString includeSiteCustomize ''
|
|
# Include a sitecustomize.py file
|
|
cp ${../sitecustomize.py} $out/${sitePackages}/sitecustomize.py
|
|
|
|
'' + optionalString stripBytecode ''
|
|
# Determinism: deterministic bytecode
|
|
# First we delete all old bytecode.
|
|
find $out -type d -name __pycache__ -print0 | xargs -0 -I {} rm -rf "{}"
|
|
'' + optionalString rebuildBytecode ''
|
|
# Python 3.7 implements PEP 552, introducing support for deterministic bytecode.
|
|
# compileall uses the therein introduced checked-hash method by default when
|
|
# `SOURCE_DATE_EPOCH` is set.
|
|
# We exclude lib2to3 because that's Python 2 code which fails
|
|
# We build 3 levels of optimized bytecode. Note the default level, without optimizations,
|
|
# is not reproducible yet. https://bugs.python.org/issue29708
|
|
# Not creating bytecode will result in a large performance loss however, so we do build it.
|
|
find $out -name "*.py" | ${pythonForBuildInterpreter} -m compileall -q -f -x "lib2to3" -i -
|
|
find $out -name "*.py" | ${pythonForBuildInterpreter} -O -m compileall -q -f -x "lib2to3" -i -
|
|
find $out -name "*.py" | ${pythonForBuildInterpreter} -OO -m compileall -q -f -x "lib2to3" -i -
|
|
'' + ''
|
|
# *strip* shebang from libpython gdb script - it should be dual-syntax and
|
|
# interpretable by whatever python the gdb in question is using, which may
|
|
# not even match the major version of this python. doing this after the
|
|
# bytecode compilations for the same reason - we don't want bytecode generated.
|
|
mkdir -p $out/share/gdb
|
|
sed '/^#!/d' Tools/gdb/libpython.py > $out/share/gdb/libpython.py
|
|
'';
|
|
|
|
preFixup = lib.optionalString (stdenv.hostPlatform != stdenv.buildPlatform) ''
|
|
# Ensure patch-shebangs uses shebangs of host interpreter.
|
|
export PATH=${lib.makeBinPath [ "$out" bash ]}:$PATH
|
|
'';
|
|
|
|
# Add CPython specific setup-hook that configures distutils.sysconfig to
|
|
# always load sysconfigdata from host Python.
|
|
postFixup = lib.optionalString (!stdenv.hostPlatform.isDarwin) ''
|
|
cat << "EOF" >> "$out/nix-support/setup-hook"
|
|
${sysconfigdataHook}
|
|
EOF
|
|
'';
|
|
|
|
# Enforce that we don't have references to the OpenSSL -dev package, which we
|
|
# explicitly specify in our configure flags above.
|
|
disallowedReferences =
|
|
lib.optionals (openssl != null && !static) [ openssl.dev ]
|
|
++ lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
|
|
# Ensure we don't have references to build-time packages.
|
|
# These typically end up in shebangs.
|
|
pythonForBuild buildPackages.bash
|
|
];
|
|
|
|
separateDebugInfo = true;
|
|
|
|
inherit passthru;
|
|
|
|
enableParallelBuilding = true;
|
|
|
|
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 = licenses.psfl;
|
|
platforms = with platforms; linux ++ darwin;
|
|
maintainers = with maintainers; [ fridh ];
|
|
};
|
|
}
|