ca9b6877a1
python has a severe bug which prevents it from building, or performing certain filesystem operations, on NFS. A few functions in the shutil module, notably chflag(), will attempt to copy file metadata which includes flags. Certain filesystems, such as NFS, don't support copying flags and will raise ENOTSUP when it is attempted. Unfortunately a portion of the python build process indirectly uses chflag() to copy metadata, which results in a build failure if the install prefix is on an NFS volume. This was patched in 2010, but the patch didn't actually work on OS X. This upstream patch fixes it for real.
278 lines
11 KiB
Ruby
278 lines
11 KiB
Ruby
require 'formula'
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class TkCheck < Requirement
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def message; <<-EOS.undent
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Tk.framework was detected in /Library/Frameworks
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This can cause Python builds to fail. See:
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https://github.com/mxcl/homebrew/issues/11602
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EOS
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end
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def fatal?; false; end
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def satisfied?
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not File.exist? '/Library/Frameworks/Tk.framework'
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end
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end
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class Distribute < Formula
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url 'http://pypi.python.org/packages/source/d/distribute/distribute-0.6.32.tar.gz'
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sha1 '65ae88517ac47bd4e0fb449b3b9a9bf85e8366c8'
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end
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class Pip < Formula
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url 'http://pypi.python.org/packages/source/p/pip/pip-1.2.1.tar.gz'
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sha1 '35db84983ef3f66a8a161d320e61d192afc233d9'
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end
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class Python < Formula
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homepage 'http://www.python.org'
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url 'http://www.python.org/ftp/python/2.7.3/Python-2.7.3.tar.bz2'
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sha1 '842c4e2aff3f016feea3c6e992c7fa96e49c9aa0'
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depends_on TkCheck.new
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depends_on 'pkg-config' => :build
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depends_on 'readline' => :recommended
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depends_on 'sqlite' => :recommended
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depends_on 'gdbm' => :recommended
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depends_on 'openssl' if build.include? 'with-brewed-openssl'
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option :universal
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option 'quicktest', 'Run `make quicktest` after the build'
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option 'with-brewed-openssl', "Use Homebrew's openSSL instead of the one from OS X"
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option 'with-poll', 'Enable select.poll, which is not fully implemented on OS X (http://bugs.python.org/issue5154)'
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# --with-dtrace relies on CLT as dtrace hard-codes paths to /usr
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option 'with-dtrace', 'Experimental DTrace support (http://bugs.python.org/issue13405)' if MacOS::CLT.installed?
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def patches
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p = []
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# python fails to build on NFS; patch is merged upstream, will be in next release
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# see http://bugs.python.org/issue14662
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p << "https://gist.github.com/raw/4349132/25662c6b382315b5db67bf949773d76471bbcee7/python-nfs-shutil.diff"
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p << 'https://raw.github.com/gist/3415636/2365dea8dc5415daa0148e98c394345e1191e4aa/pythondtrace-patch.diff' if build.include? 'with-dtrace'
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p
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end
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def site_packages_cellar
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prefix/"Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages"
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end
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# The HOMEBREW_PREFIX location of site-packages.
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def site_packages
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HOMEBREW_PREFIX/"lib/python2.7/site-packages"
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end
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# Where distribute/pip will install executable scripts.
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def scripts_folder
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HOMEBREW_PREFIX/"share/python"
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end
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def install
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opoo 'The given option --with-poll enables a somewhat broken poll() on OS X (http://bugs.python.org/issue5154).' if build.include? 'with-poll'
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# Unset these so that installing pip and distribute puts them where we want
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# and not into some other Python the user has installed.
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ENV['PYTHONPATH'] = nil
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ENV['PYTHONHOME'] = nil
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args = %W[
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--prefix=#{prefix}
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--enable-ipv6
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--datarootdir=#{share}
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--datadir=#{share}
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--enable-framework=#{prefix}/Frameworks
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]
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args << '--without-gcc' if ENV.compiler == :clang
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args << '--with-dtrace' if build.include? 'with-dtrace'
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distutils_fix_superenv(args)
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distutils_fix_stdenv
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if build.universal?
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ENV.universal_binary
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args << "--enable-universalsdk=/" << "--with-universal-archs=intel"
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end
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# Allow sqlite3 module to load extensions: http://docs.python.org/library/sqlite3.html#f1
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inreplace "setup.py", 'sqlite_defines.append(("SQLITE_OMIT_LOAD_EXTENSION", "1"))', ''
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system "./configure", *args
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# HAVE_POLL is "broken" on OS X
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# See: http://trac.macports.org/ticket/18376 and http://bugs.python.org/issue5154
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inreplace 'pyconfig.h', /.*?(HAVE_POLL[_A-Z]*).*/, '#undef \1' unless build.include? "with-poll"
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system "make"
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ENV.deparallelize # Installs must be serialized
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# Tell Python not to install into /Applications (default for framework builds)
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system "make", "install", "PYTHONAPPSDIR=#{prefix}"
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# Demos and Tools
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(HOMEBREW_PREFIX/'share/python').mkpath
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system "make", "frameworkinstallextras", "PYTHONAPPSDIR=#{share}/python"
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system "make", "quicktest" if build.include? 'quicktest'
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# Post-install, fix up the site-packages and install-scripts folders
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# so that user-installed Python software survives minor updates, such
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# as going from 2.7.0 to 2.7.1:
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# Remove the site-packages that Python created in its Cellar.
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site_packages_cellar.rmtree
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# Create a site-packages in HOMEBREW_PREFIX/lib/python/site-packages
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site_packages.mkpath
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# Symlink the prefix site-packages into the cellar.
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ln_s site_packages, site_packages_cellar
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# Teach python not to use things from /System
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# and tell it about the correct site-package dir because we moved it
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sitecustomize = site_packages_cellar/"sitecustomize.py"
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rm sitecustomize if File.exist? sitecustomize
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sitecustomize.write <<-EOF.undent
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# This file is created by `brew install python` and is executed on each
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# python startup. Don't print from here, or else universe will collapse.
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import sys
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import site
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# Only do fix 1 and 2, if the currently run python is a brewed one.
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if sys.executable.startswith('#{HOMEBREW_PREFIX}'):
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# Fix 1)
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# A setuptools.pth and/or easy-install.pth sitting either in
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# /Library/Python/2.7/site-packages or in
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# ~/Library/Python/2.7/site-packages can inject the
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# /System's Python site-packages. People then report
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# "OSError: [Errno 13] Permission denied" because pip/easy_install
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# attempts to install into
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# /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python
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# See: https://github.com/mxcl/homebrew/issues/14712
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sys.path = [ p for p in sys.path if not p.startswith('/System') ]
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# Fix 2)
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# Remove brewed Python's hard-coded site-packages
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sys.path.remove('#{site_packages_cellar}')
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# Fix 3)
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# For all Pythons: Tell about homebrew's site-packages location.
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# This is needed for Python to parse *.pth files.
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site.addsitedir('#{site_packages}')
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EOF
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# Install distribute and pip
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# It's important to have these installers in our bin, because some users
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# forget to put #{script_folder} in PATH, then easy_install'ing
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# into /Library/Python/X.Y/site-packages with /usr/bin/easy_install.
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mkdir_p scripts_folder unless scripts_folder.exist?
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setup_args = ["-s", "setup.py", "--no-user-cfg", "install", "--force", "--verbose", "--install-lib=#{site_packages_cellar}", "--install-scripts=#{bin}" ]
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Distribute.new.brew { system "#{bin}/python", *setup_args }
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Pip.new.brew { system "#{bin}/python", *setup_args }
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# Tell distutils-based installers where to put scripts and python modules
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(prefix/"Frameworks/Python.framework/Versions/2.7/lib/python2.7/distutils/distutils.cfg").write <<-EOF.undent
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[install]
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install-scripts=#{scripts_folder}
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install-lib=#{site_packages}
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EOF
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unless MacOS::CLT.installed?
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makefile = prefix/'Frameworks/Python.framework/Versions/2.7/lib/python2.7/config/Makefile'
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inreplace makefile do |s|
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s.gsub!(/^CC=.*$/, "CC=xcrun clang")
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s.gsub!(/^CXX=.*$/, "CXX=xcrun clang++")
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s.gsub!(/^AR=.*$/, "AR=xcrun ar")
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s.gsub!(/^RANLIB=.*$/, "RANLIB=xcrun ranlib")
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end
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end
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end
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def distutils_fix_superenv(args)
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if superenv?
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# To allow certain Python bindings to find brewed software:
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cflags = "CFLAGS=-I#{HOMEBREW_PREFIX}/include"
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ldflags = "LDFLAGS=-L#{HOMEBREW_PREFIX}/lib"
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unless MacOS::CLT.installed?
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# Help Python's build system (distribute/pip) to build things on Xcode-only systems
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# The setup.py looks at "-isysroot" to get the sysroot (and not at --sysroot)
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cflags += " -isysroot #{MacOS.sdk_path}"
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# For the Xlib.h, Python needs this header dir
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cflags += " -I#{MacOS.sdk_path}/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers"
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ldflags += " -isysroot #{MacOS.sdk_path}"
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# Same zlib.h-not-found-bug as in env :std (see below)
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args << "CPPFLAGS=-I#{MacOS.sdk_path}/usr/include"
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end
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args << cflags
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args << ldflags
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# Avoid linking to libgcc http://code.activestate.com/lists/python-dev/112195/
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args << "MACOSX_DEPLOYMENT_TARGET=#{MacOS.version}"
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# We want our readline! This is just to outsmart the detection code,
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# superenv handles that cc finds includes/libs!
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inreplace "setup.py",
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"do_readline = self.compiler.find_library_file(lib_dirs, 'readline')",
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"do_readline = '#{HOMEBREW_PREFIX}/opt/readline/lib/libhistory.dylib'"
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end
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end
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def distutils_fix_stdenv()
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if not superenv?
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# Python scans all "-I" dirs but not "-isysroot", so we add
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# the needed includes with "-I" here to avoid this err:
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# building dbm using ndbm
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# error: /usr/include/zlib.h: No such file or directory
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ENV.append 'CPPFLAGS', "-I#{MacOS.sdk_path}/usr/include" unless MacOS::CLT.installed?
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# Don't use optimizations other than "-Os" here, because Python's distutils
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# remembers (hint: `python3-config --cflags`) and reuses them for C
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# extensions which can break software (such as scipy 0.11 fails when
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# "-msse4" is present.)
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ENV.minimal_optimization
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# We need to enable warnings because the configure.in uses -Werror to detect
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# "whether gcc supports ParseTuple" (https://github.com/mxcl/homebrew/issues/12194)
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ENV.enable_warnings
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if ENV.compiler == :clang
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# http://docs.python.org/devguide/setup.html#id8 suggests to disable some Warnings.
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ENV.append_to_cflags '-Wno-unused-value'
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ENV.append_to_cflags '-Wno-empty-body'
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ENV.append_to_cflags '-Qunused-arguments'
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end
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end
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end
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def caveats
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<<-EOS.undent
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Homebrew's Python framework
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#{prefix}/Frameworks/Python.framework
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Python demo
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#{HOMEBREW_PREFIX}/share/python/Extras
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Distribute and Pip have been installed. To update them
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pip install --upgrade distribute
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pip install --upgrade pip
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To symlink "Idle" and the "Python Launcher" to ~/Applications
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`brew linkapps`
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You can install Python packages with (the outdated easy_install or)
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`pip install <your_favorite_package>`
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They will install into the site-package directory
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#{site_packages}
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Executable python scripts will be put in:
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#{scripts_folder}
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so you may want to put "#{scripts_folder}" in your PATH, too.
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See: https://github.com/mxcl/homebrew/wiki/Homebrew-and-Python
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EOS
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end
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def test
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# Check if sqlite is ok, because we build with --enable-loadable-sqlite-extensions
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# and it can occur that building sqlite silently fails if OSX's sqlite is used.
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system "#{bin}/python", "-c", "import sqlite3"
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# Check if some other modules import. Then the linked libs are working.
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system "#{bin}/python", "-c", "import Tkinter"
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end
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end
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