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require 'formula'
require Formula.path("python") # For TkCheck requirement
# Python3 is the new language standard, not just a new revision.
# It's somewhat incompatible to Python 2.x, therefore, the executable
# "python" will always point to the 2.x version which you can get by
# `brew install python`.
class Distribute < Formula
url 'http://pypi.python.org/packages/source/d/distribute/distribute-0.6.28.tar.gz'
sha1 '4c2d562a0681ba27bc920500050e2f08de224311'
end
# Recommended way of installing python modules (http://pypi.python.org/pypi)
class Pip < Formula
url 'http://pypi.python.org/packages/source/p/pip/pip-1.1.tar.gz'
sha1 '4c2d562a0681ba27bc920500050e2f08de224311'
end
class Python3 < Formula
homepage 'http://www.python.org/'
url 'http://python.org/ftp/python/3.2.3/Python-3.2.3.tar.bz2'
sha1 '4c2d562a0681ba27bc920500050e2f08de224311'
depends_on TkCheck.new
depends_on 'pkg-config' => :build
depends_on 'readline' => :recommended
depends_on 'sqlite' => :recommended
depends_on 'gdbm' => :recommended
depends_on :x11 # tk.h includes X11/Xlib.h and X11/X.h
option 'quicktest', 'Run `make quicktest` after the build'
# Skip binaries so modules will load; skip lib because it is mostly Python files
skip_clean ['bin', 'lib']
def site_packages_cellar
prefix/"Frameworks/Python.framework/Versions/3.2/lib/python3.2/site-packages"
end
# The HOMEBREW_PREFIX location of site-packages.
def site_packages
HOMEBREW_PREFIX/"lib/python3.2/site-packages"
end
# Where distribute/pip will install executable scripts.
def scripts_folder
HOMEBREW_PREFIX/"share/python3"
end
def effective_lib
prefix/"Frameworks/Python.framework/Versions/3.2/lib"
end
def install
args = %W[--prefix=#{prefix}
--enable-ipv6
--datarootdir=#{share}
--datadir=#{share}
--enable-framework=#{prefix}/Frameworks
]
args << '--without-gcc' if ENV.compiler == :clang
# Don't use optimizations other than "-Os" here, because Python's distutils
# remembers (hint: `python-config --cflags`) and reuses them for C
# extensions which can break software (such as scipy 0.11 fails when
# "-msse4" is present.)
ENV.minimal_optimization
# We need to enable warnings because the configure.in uses -Werror to detect
# "whether gcc supports ParseTuple" (https://github.com/mxcl/homebrew/issues/12194)
ENV.enable_warnings
if ENV.compiler == :clang
# http://docs.python.org/devguide/setup.html#id8 suggests to disable some Warnings.
ENV.append_to_cflags '-Wno-unused-value'
ENV.append_to_cflags '-Wno-empty-body'
end
# Allow sqlite3 module to load extensions:
# http://docs.python.org/library/sqlite3.html#f1
inreplace "setup.py", 'sqlite_defines.append(("SQLITE_OMIT_LOAD_EXTENSION", "1"))', 'pass'
system "./configure", *args
system "make"
ENV.deparallelize # Installs must be serialized
# Tell Python not to install into /Applications (default for framework builds)
system "make", "install", "PYTHONAPPSDIR=#{prefix}"
system "make", "quicktest" if build.include? "quicktest"
# Any .app get a " 3" attached, so it does not conflict with python 2.x.
Dir.glob(prefix/"*.app").each do |app|
mv app, app.gsub(".app", " 3.app")
end
# Post-install, fix up the site-packages and install-scripts folders
# so that user-installed Python software survives minor updates, such
# as going from 3.2.2 to 3.2.3.
# Remove the site-packages that Python created in its Cellar.
site_packages_cellar.rmtree
# Create a site-packages in HOMEBREW_PREFIX/lib/python3/site-packages
site_packages.mkpath
# Symlink the prefix site-packages into the cellar.
ln_s site_packages, site_packages_cellar
# "python3" and executable is forgotten for framework builds.
# Make sure homebrew symlinks it to HOMEBREW_PREFIX/bin.
ln_s "#{bin}/python3.2", "#{bin}/python3" unless (bin/"python3").exist?
# Tell distutils-based installers where to put scripts
scripts_folder.mkpath
(effective_lib/"python3.2/distutils/distutils.cfg").write <<-EOF.undent
[install]
install-scripts=#{scripts_folder}
EOF
# Install distribute for python3
Distribute.new.brew do
system "#{bin}/python3.2", "setup.py", "install"
# Symlink to easy_install3 to match python3 command.
unless (scripts_folder/'easy_install3').exist?
ln_s scripts_folder/"easy_install", scripts_folder/"easy_install3"
end
end
# Install pip-3.2 for python3
Pip.new.brew { system "#{bin}/python3.2", "setup.py", "install" }
end
def caveats
text = <<-EOS.undent
The Python framework is located at:
#{prefix}/Frameworks/Python.framework
You can `brew linkapps` to symlink "Idle 3" and the "Python Launcher 3".
EOS
# Tk warning only for 10.6
tk_caveats = <<-EOS.undent
Apple's Tcl/Tk is not recommended for use with Python on Mac OS X 10.6.
For more information see: http://www.python.org/download/mac/tcltk/
EOS
general_caveats = <<-EOS.undent
A "distutils.cfg" has been written, specifying the install-scripts directory as:
#{scripts_folder}
If you install Python packages via "pip-3.2 install x" or "python3 setup.py install"
(or the outdated easy_install3), any provided scripts will go into the
install-scripts folder above, so you may want to add it to your PATH.
The site-package directory for brewed Python:
#{site_packages}
Distribute and Pip have been installed. To update them:
#{scripts_folder}/pip-3.2 install --upgrade distribute
#{scripts_folder}/pip-3.2 install --upgrade pip
See: https://github.com/mxcl/homebrew/wiki/Homebrew-and-Python
EOS
text += tk_caveats unless MacOS.version >= :lion
text += general_caveats
return text
end
def test
# Check if sqlite is ok, because we build with --enable-loadable-sqlite-extensions
# and it can occur that building sqlite silently fails.
system "#{bin}/python3", "-c", "import sqlite3"
# See: https://github.com/mxcl/homebrew/pull/10487
# Fixed [upstream](http://bugs.python.org/issue11149), but still nice to have.
`#{bin}/python3 -c 'from decimal import Decimal; print(Decimal(4) / Decimal(2))'`.chomp == '2'
end
end
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