homebrew-core/Formula/python.rb
2018-02-07 11:48:32 +01:00

390 lines
16 KiB
Ruby

class Python < Formula
desc "Interpreted, interactive, object-oriented programming language"
homepage "https://www.python.org/"
url "https://www.python.org/ftp/python/2.7.14/Python-2.7.14.tar.xz"
sha256 "71ffb26e09e78650e424929b2b457b9c912ac216576e6bd9e7d204ed03296a66"
revision 3
head "https://github.com/python/cpython.git", :branch => "2.7"
bottle do
sha256 "4e05897c538937126494a2e611e109e95e761a333dc1911e4ea77171f7cf2e4d" => :high_sierra
sha256 "0ac689593fa82905b69aacafc7bde61f88b54bdc36cacd4cfc2f315732eb60c4" => :sierra
sha256 "bd8cbaf020a476bfd53c75538244520b7713554feafeac3f0d454f8fb92c1293" => :el_capitan
end
# Please don't add a wide/ucs4 option as it won't be accepted.
# More details in: https://github.com/Homebrew/homebrew/pull/32368
option "with-quicktest", "Run `make quicktest` after the build (for devs; may fail)"
option "with-tcl-tk", "Use Homebrew's Tk instead of macOS Tk (has optional Cocoa and threads support)"
option "with-poll", "Enable select.poll, which is not fully implemented on macOS (https://bugs.python.org/issue5154)"
# sphinx-doc depends on python, but on 10.6 or earlier python is fulfilled by
# brew, which would lead to circular dependency.
if MacOS.version > :snow_leopard
option "with-sphinx-doc", "Build HTML documentation"
depends_on "sphinx-doc" => [:build, :optional]
end
deprecated_option "quicktest" => "with-quicktest"
deprecated_option "with-brewed-tk" => "with-tcl-tk"
depends_on "pkg-config" => :build
depends_on "readline" => :recommended
depends_on "sqlite" => :recommended
depends_on "gdbm" => :recommended
depends_on "openssl"
depends_on "tcl-tk" => :optional
depends_on "berkeley-db@4" => :optional
resource "setuptools" do
url "https://files.pythonhosted.org/packages/a4/c8/9a7a47f683d54d83f648d37c3e180317f80dc126a304c45dc6663246233a/setuptools-36.5.0.zip"
sha256 "ce2007c1cea3359870b80657d634253a0765b0c7dc5a988d77ba803fc86f2c64"
end
resource "pip" do
url "https://files.pythonhosted.org/packages/11/b6/abcb525026a4be042b486df43905d6893fb04f05aac21c32c638e939e447/pip-9.0.1.tar.gz"
sha256 "09f243e1a7b461f654c26a725fa373211bb7ff17a9300058b205c61658ca940d"
end
resource "wheel" do
url "https://files.pythonhosted.org/packages/fa/b4/f9886517624a4dcb81a1d766f68034344b7565db69f13d52697222daeb72/wheel-0.30.0.tar.gz"
sha256 "9515fe0a94e823fd90b08d22de45d7bde57c90edce705b22f5e1ecf7e1b653c8"
end
# Patch to disable the search for Tk.framework, since Homebrew's Tk is
# a plain unix build. Remove `-lX11`, too because our Tk is "AquaTk".
if build.with? "tcl-tk"
patch do
url "https://raw.githubusercontent.com/Homebrew/patches/42fcf22/python/brewed-tk-patch.diff"
sha256 "15c153bdfe51a98efe48f8e8379f5d9b5c6c4015e53d3f9364d23c8689857f09"
end
end
def lib_cellar
prefix/"Frameworks/Python.framework/Versions/2.7/lib/python2.7"
end
def site_packages_cellar
lib_cellar/"site-packages"
end
# The HOMEBREW_PREFIX location of site-packages.
def site_packages
HOMEBREW_PREFIX/"lib/python2.7/site-packages"
end
# setuptools remembers the build flags python is built with and uses them to
# build packages later. Xcode-only systems need different flags.
pour_bottle? do
reason <<~EOS
The bottle needs the Apple Command Line Tools to be installed.
You can install them, if desired, with:
xcode-select --install
EOS
satisfy { MacOS::CLT.installed? }
end
def install
ENV.permit_weak_imports
if build.with? "poll"
opoo "The given option --with-poll enables a somewhat broken poll() on macOS (https://bugs.python.org/issue5154)."
end
# Unset these so that installing pip and setuptools puts them where we want
# and not into some other Python the user has installed.
ENV["PYTHONHOME"] = nil
ENV["PYTHONPATH"] = nil
args = %W[
--prefix=#{prefix}
--enable-ipv6
--datarootdir=#{share}
--datadir=#{share}
--enable-framework=#{frameworks}
--without-ensurepip
]
# See upstream bug report from 22 Jan 2018 "Significant performance problems
# with Python 2.7 built with clang 3.x or 4.x"
# https://bugs.python.org/issue32616
# https://github.com/Homebrew/homebrew-core/issues/22743
if DevelopmentTools.clang_build_version >= 802 &&
DevelopmentTools.clang_build_version < 1000
args << "--without-computed-gotos"
end
args << "--without-gcc" if ENV.compiler == :clang
cflags = []
ldflags = []
cppflags = []
unless MacOS::CLT.installed?
# Help Python's build system (setuptools/pip) to build things on Xcode-only systems
# The setup.py looks at "-isysroot" to get the sysroot (and not at --sysroot)
cflags << "-isysroot #{MacOS.sdk_path}"
ldflags << "-isysroot #{MacOS.sdk_path}"
cppflags << "-I#{MacOS.sdk_path}/usr/include" # find zlib
# For the Xlib.h, Python needs this header dir with the system Tk
if build.without? "tcl-tk"
cflags << "-I#{MacOS.sdk_path}/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers"
end
end
# Avoid linking to libgcc https://code.activestate.com/lists/python-dev/112195/
args << "MACOSX_DEPLOYMENT_TARGET=#{MacOS.version}"
# We want our readline and openssl! This is just to outsmart the detection code,
# superenv handles that cc finds includes/libs!
inreplace "setup.py" do |s|
s.gsub! "do_readline = self.compiler.find_library_file(lib_dirs, 'readline')",
"do_readline = '#{Formula["readline"].opt_lib}/libhistory.dylib'"
s.gsub! "/usr/local/ssl", Formula["openssl"].opt_prefix
s.gsub! "/usr/include/db4", Formula["berkeley-db@4"].opt_include
end
if build.with? "sqlite"
inreplace "setup.py" do |s|
s.gsub! "sqlite_setup_debug = False", "sqlite_setup_debug = True"
s.gsub! "for d_ in inc_dirs + sqlite_inc_paths:",
"for d_ in ['#{Formula["sqlite"].opt_include}']:"
# Allow sqlite3 module to load extensions:
# https://docs.python.org/library/sqlite3.html#f1
s.gsub! 'sqlite_defines.append(("SQLITE_OMIT_LOAD_EXTENSION", "1"))', ""
end
end
# Allow python modules to use ctypes.find_library to find homebrew's stuff
# even if homebrew is not a /usr/local/lib. Try this with:
# `brew install enchant && pip2 install pyenchant`
inreplace "./Lib/ctypes/macholib/dyld.py" do |f|
f.gsub! "DEFAULT_LIBRARY_FALLBACK = [", "DEFAULT_LIBRARY_FALLBACK = [ '#{HOMEBREW_PREFIX}/lib',"
f.gsub! "DEFAULT_FRAMEWORK_FALLBACK = [", "DEFAULT_FRAMEWORK_FALLBACK = [ '#{HOMEBREW_PREFIX}/Frameworks',"
end
if build.with? "tcl-tk"
tcl_tk = Formula["tcl-tk"].opt_prefix
cppflags << "-I#{tcl_tk}/include"
ldflags << "-L#{tcl_tk}/lib"
end
args << "CFLAGS=#{cflags.join(" ")}" unless cflags.empty?
args << "LDFLAGS=#{ldflags.join(" ")}" unless ldflags.empty?
args << "CPPFLAGS=#{cppflags.join(" ")}" unless cppflags.empty?
system "./configure", *args
# HAVE_POLL is "broken" on macOS. See:
# https://trac.macports.org/ticket/18376
# https://bugs.python.org/issue5154
if build.without? "poll"
inreplace "pyconfig.h", /.*?(HAVE_POLL[_A-Z]*).*/, '#undef \1'
end
system "make"
if build.with?("quicktest") || build.bottle?
system "make", "quicktest", "TESTPYTHONOPTS=-s", "TESTOPTS=-j#{ENV.make_jobs} -w"
end
ENV.deparallelize do
# Tell Python not to install into /Applications
system "make", "install", "PYTHONAPPSDIR=#{prefix}"
system "make", "frameworkinstallextras", "PYTHONAPPSDIR=#{pkgshare}"
end
# Fixes setting Python build flags for certain software
# See: https://github.com/Homebrew/homebrew/pull/20182
# https://bugs.python.org/issue3588
inreplace lib_cellar/"config/Makefile" do |s|
s.change_make_var! "LINKFORSHARED",
"-u _PyMac_Error $(PYTHONFRAMEWORKINSTALLDIR)/Versions/$(VERSION)/$(PYTHONFRAMEWORK)"
end
# Prevent third-party packages from building against fragile Cellar paths
inreplace [lib_cellar/"_sysconfigdata.py",
lib_cellar/"config/Makefile",
frameworks/"Python.framework/Versions/Current/lib/pkgconfig/python-2.7.pc"],
prefix, opt_prefix
# Symlink the pkgconfig files into HOMEBREW_PREFIX so they're accessible.
(lib/"pkgconfig").install_symlink Dir[frameworks/"Python.framework/Versions/Current/lib/pkgconfig/*"]
# Remove the site-packages that Python created in its Cellar.
site_packages_cellar.rmtree
(libexec/"setuptools").install resource("setuptools")
(libexec/"pip").install resource("pip")
(libexec/"wheel").install resource("wheel")
if MacOS.version > :snow_leopard && build.with?("sphinx-doc")
cd "Doc" do
system "make", "html"
doc.install Dir["build/html/*"]
end
end
# Remove commands shadowing system python.
{
"2to3" => "2to3-2",
"easy_install" => "easy_install-2.7",
"idle" => "idle2",
"pip" => "pip2",
"pydoc" => "pydoc2",
"python" => "python2",
"python-config" => "python2-config",
"pythonw" => "pythonw2",
"smtpd.py" => "smtpd2.py",
"wheel" => nil,
}.each do |unversioned_name, versioned_name|
rm_f bin/unversioned_name
next unless versioned_name
(libexec/"bin").install_symlink bin/versioned_name => unversioned_name
end
end
def post_install
# Fix up the site-packages so that user-installed Python software survives
# minor updates, such as going from 2.7.0 to 2.7.1:
# Create a site-packages in HOMEBREW_PREFIX/lib/python2.7/site-packages
site_packages.mkpath
# Symlink the prefix site-packages into the cellar.
site_packages_cellar.unlink if site_packages_cellar.exist?
site_packages_cellar.parent.install_symlink site_packages
# Write our sitecustomize.py
rm_rf Dir["#{site_packages}/sitecustomize.py[co]"]
(site_packages/"sitecustomize.py").atomic_write(sitecustomize)
# Remove old setuptools installations that may still fly around and be
# listed in the easy_install.pth. This can break setuptools build with
# zipimport.ZipImportError: bad local file header
# setuptools-0.9.5-py3.3.egg
rm_rf Dir["#{site_packages}/setuptools*"]
rm_rf Dir["#{site_packages}/distribute*"]
rm_rf Dir["#{site_packages}/pip[-_.][0-9]*", "#{site_packages}/pip"]
setup_args = ["-s", "setup.py", "--no-user-cfg", "install", "--force",
"--verbose",
"--single-version-externally-managed",
"--record=installed.txt",
"--install-scripts=#{bin}",
"--install-lib=#{site_packages}"]
(libexec/"setuptools").cd { system "#{bin}/python2", *setup_args }
(libexec/"pip").cd { system "#{bin}/python2", *setup_args }
(libexec/"wheel").cd { system "#{bin}/python2", *setup_args }
# When building from source, these symlinks will not exist, since
# post_install happens after linking.
%w[pip2 pip2.7 easy_install-2.7].each do |e|
(HOMEBREW_PREFIX/"bin").install_symlink bin/e
end
# Help distutils find brewed stuff when building extensions
include_dirs = [HOMEBREW_PREFIX/"include", Formula["openssl"].opt_include]
library_dirs = [HOMEBREW_PREFIX/"lib", Formula["openssl"].opt_lib]
if build.with? "sqlite"
include_dirs << Formula["sqlite"].opt_include
library_dirs << Formula["sqlite"].opt_lib
end
if build.with? "tcl-tk"
include_dirs << Formula["tcl-tk"].opt_include
library_dirs << Formula["tcl-tk"].opt_lib
end
cfg = lib_cellar/"distutils/distutils.cfg"
cfg.atomic_write <<~EOS
[install]
prefix=#{HOMEBREW_PREFIX}
[build_ext]
include_dirs=#{include_dirs.join ":"}
library_dirs=#{library_dirs.join ":"}
EOS
end
def sitecustomize
<<~EOS
# This file is created by Homebrew and is executed on each python startup.
# Don't print from here, or else python command line scripts may fail!
# <https://docs.brew.sh/Homebrew-and-Python.html>
import re
import os
import sys
if sys.version_info[0] != 2:
# This can only happen if the user has set the PYTHONPATH for 3.x and run Python 2.x or vice versa.
# Every Python looks at the PYTHONPATH variable and we can't fix it here in sitecustomize.py,
# because the PYTHONPATH is evaluated after the sitecustomize.py. Many modules (e.g. PyQt4) are
# built only for a specific version of Python and will fail with cryptic error messages.
# In the end this means: Don't set the PYTHONPATH permanently if you use different Python versions.
exit('Your PYTHONPATH points to a site-packages dir for Python 2.x but you are running Python ' +
str(sys.version_info[0]) + '.x!\\n PYTHONPATH is currently: "' + str(os.environ['PYTHONPATH']) + '"\\n' +
' You should `unset PYTHONPATH` to fix this.')
# Only do this for a brewed python:
if os.path.realpath(sys.executable).startswith('#{rack}'):
# Shuffle /Library site-packages to the end of sys.path and reject
# paths in /System pre-emptively (#14712)
library_site = '/Library/Python/2.7/site-packages'
library_packages = [p for p in sys.path if p.startswith(library_site)]
sys.path = [p for p in sys.path if not p.startswith(library_site) and
not p.startswith('/System')]
# .pth files have already been processed so don't use addsitedir
sys.path.extend(library_packages)
# the Cellar site-packages is a symlink to the HOMEBREW_PREFIX
# site_packages; prefer the shorter paths
long_prefix = re.compile(r'#{rack}/[0-9\._abrc]+/Frameworks/Python\.framework/Versions/2\.7/lib/python2\.7/site-packages')
sys.path = [long_prefix.sub('#{site_packages}', p) for p in sys.path]
# LINKFORSHARED (and python-config --ldflags) return the
# full path to the lib (yes, "Python" is actually the lib, not a
# dir) so that third-party software does not need to add the
# -F/#{HOMEBREW_PREFIX}/Frameworks switch.
try:
from _sysconfigdata import build_time_vars
build_time_vars['LINKFORSHARED'] = '-u _PyMac_Error #{opt_prefix}/Frameworks/Python.framework/Versions/2.7/Python'
except:
pass # remember: don't print here. Better to fail silently.
# Set the sys.executable to use the opt_prefix
sys.executable = '#{opt_bin}/python2.7'
EOS
end
def caveats; <<~EOS
This formula installs a python2 executable to #{HOMEBREW_PREFIX}/bin.
If you wish to have this formula's python executable in your PATH then add
the following to #{shell_profile}:
export PATH="#{opt_libexec}/bin:$PATH"
Pip and setuptools have been installed. To update them
pip2 install --upgrade pip setuptools
You can install Python packages with
pip2 install <package>
They will install into the site-package directory
#{site_packages}
See: https://docs.brew.sh/Homebrew-and-Python.html
EOS
end
test do
# Check if sqlite is ok, because we build with --enable-loadable-sqlite-extensions
# and it can occur that building sqlite silently fails if OSX's sqlite is used.
system "#{bin}/python2", "-c", "import sqlite3"
# Check if some other modules import. Then the linked libs are working.
system "#{bin}/python2", "-c", "import Tkinter; root = Tkinter.Tk()"
system "#{bin}/python2", "-c", "import gdbm"
system bin/"pip2", "list"
end
end