On 7/14/12 10:25 AM, Richard Tew wrote:
If you get it in, and this means (brew, formulas.. and for that matter
MacOS are confusing to me) that MacOS users can just install stackless
from source with no extra work, let us know and we'll point the
downloads page to the appropriate place with a mention.

Wasn't accepted for the master, they wanted it at most keg only, gave up on that for the moment. They mentioned to have a hell of a lot of Python problems on the Mac interfering with the system one, so they were not really enthusiastic about having yet another 'Python'.

Be it as it is, there is still the way to go without forking and simply do a brew create, with a new formula called 'stackless' and paste the attached file into it in full, replacing the presented boilerplate Ruby code and then do a brew install stackless, living with your local formula.

Enjoy, Werner

require 'formula'

# Was a Framework build requested?
def build_framework?; ARGV.include? '--framework'; end

# Are we installed or installing as a Framework?
def as_framework?
  (self.installed? and File.exists? prefix+"Frameworks/Python.framework") or build_framework?
end

class Distribute < Formula
  url 'http://pypi.python.org/packages/source/d/distribute/distribute-0.6.27.tar.gz'
  md5 'ecd75ea629fee6d59d26f88c39b2d291'
end

 class Pip < Formula
   url 'http://pypi.python.org/packages/source/p/pip/pip-1.1.tar.gz'
   md5 '62a9f08dd5dc69d76734568a6c040508'
 end

# Documentation: https://github.com/mxcl/homebrew/wiki/Formula-Cookbook
# PLEASE REMOVE ALL GENERATED COMMENTS BEFORE SUBMITTING YOUR PULL REQUEST!

class Stackless < Formula
  homepage 'http://www.stackless.com/'
  url 'http://www.stackless.com/binaries/stackless-272-export.tar.bz2'
  sha1 '7a6d8016dbcb55a5e19b87ff36fe12bdf6d021d2'

  if Formula.factory('python').installed?
    opoo "stackless python replaces the standard python install. 
    
    Your python binaries will be overwritten.
    
    If this bothers you, you can restore python with `brew link python`."
  end

  depends_on 'pkg-config' => :build
  depends_on 'readline' => :optional # Prefer over OS X's libedit
  depends_on 'sqlite'   => :optional # Prefer over OS X's older version
  depends_on 'gdbm'     => :optional

  def options
    [
      ["--framework", "Do a 'Framework' build instead of a UNIX-style build."],
      ["--universal", "Build for both 32 & 64 bit Intel."],
      ["--static", "Build static libraries."]
    ]
  end

  # Skip binaries so modules will load; skip lib because it is mostly Python files
  skip_clean ['bin', 'lib']

  def install
    # Python requires -fwrapv for proper Decimal division with Clang. See:
    # https://github.com/mxcl/homebrew/pull/10487
    # http://stackoverflow.com/questions/7590137/dividing-decimals-yields-invalid-results-in-python-2-5-to-2-7
    # https://trac.macports.org/changeset/87442
    ENV.append_to_cflags "-fwrapv"

    if build_framework? and ARGV.include? "--static"
      onoe "Cannot specify both framework and static."
      exit 99
    end

    args = ["--prefix=#{prefix}"]

    if ARGV.build_universal?
      args << "--enable-universalsdk=/" << "--with-universal-archs=intel"
    end

    if build_framework?
      args << "--enable-framework=#{prefix}/Frameworks"
    else
      args << "--enable-shared" unless ARGV.include? '--static'
    end

    # allow sqlite3 module to load extensions
    inreplace "setup.py",
      'sqlite_defines.append(("SQLITE_OMIT_LOAD_EXTENSION", "1"))', ''

    system "./configure", *args

    # HAVE_POLL is "broken" on OS X
    # See: http://trac.macports.org/ticket/18376
    inreplace 'pyconfig.h', /.*?(HAVE_POLL[_A-Z]*).*/, '#undef \1'

    system "make"
    ENV.j1 # Installs must be serialized
    system "make install"

    # Post-install, fix up the site-packages and install-scripts folders
    # so that user-installed Python software survives minor updates, such
    # as going from 2.7.0 to 2.7.1.

    # Remove the site-packages that Python created in its Cellar.
    site_packages.rmtree

    # Create a site-packages in the prefix.
    prefix_site_packages.mkpath

    # Symlink the prefix site-packages into the cellar.
    ln_s prefix_site_packages, site_packages

    # This is a fix for better interoperability with pyqt. See:
    # https://github.com/mxcl/homebrew/issues/6176
    if not as_framework?
      (bin+"pythonw").make_link bin+"python"
      (bin+"pythonw2.7").make_link bin+"python2.7"
    end

    # Tell distutils-based installers where to put scripts
    scripts_folder.mkpath
    (effective_lib+"python2.7/distutils/distutils.cfg").write <<-EOF.undent
      [install]
      install-scripts=#{scripts_folder}
    EOF

    # Install distribute and pip
    Distribute.new.brew { system "#{bin}/python", "setup.py", "install" }
    Pip.new.brew { system "#{bin}/python", "setup.py", "install" }
  end

  def caveats
    framework_caveats = <<-EOS.undent

      Framework Python was installed to:
        #{prefix}/Frameworks/Python.framework

      You may want to symlink this Framework to a standard OS X location:
        mkdir -p ~/Library/Frameworks/Python.framework/Versions
        ln -s "#{prefix}/Frameworks/Python.framework/Versions/2.7" ~/Library/Frameworks/Python.framework/Versions/2.7
        ln -s ~/Library/Frameworks/Python.framework/Versions/2.7 ~/Library/Frameworks/Python.framework/Versions/Current
        ln -s ~/Library/Frameworks/Python.framework/Versions/2.7/Python ~/Library/Frameworks/Python.framework/Python
        ln -s ~/Library/Frameworks/Python.framework/Versions/2.7/Resources ~/Library/Frameworks/Python.framework/Resources
    EOS

    general_caveats = <<-EOS.undent
      A "distutils.cfg" has been written to:
        #{effective_lib}/python2.7/distutils
      specifing the install-scripts folder as:
        #{scripts_folder}

      If you install Python packages via "pip install x" or "python setup.py install"
      (or the outdated easy_install), any provided scripts will go into the
      install-scripts folder above, so you may want to add it to your PATH.

      Distribute has been installed. To update distribute itself outside of Homebrew:
          #{scripts_folder}/pip install --upgrade distribute

      See: https://github.com/mxcl/homebrew/wiki/Homebrew-and-Python
    EOS

    s = general_caveats
    s += framework_caveats if as_framework?
    return s
  end

  # lib folder,taking into account whether we are a Framework build or not
  def effective_lib
    # If we're installed or installing as a Framework, then use that location.
    return prefix+"Frameworks/Python.framework/Versions/2.7/lib" if as_framework?
    # Otherwise use just 'lib'
    return lib
  end

  # include folder,taking into account whether we are a Framework build or not
  def effective_include
    # If we're installed or installing as a Framework, then use that location.
    return prefix+"Frameworks/Python.framework/Versions/2.7/include" if as_framework?
    # Otherwise use just 'include'
    return include
  end

  # The Cellar location of site-packages
  def site_packages
    effective_lib+"python2.7/site-packages"
  end

  # The HOMEBREW_PREFIX location of site-packages
  def prefix_site_packages
    HOMEBREW_PREFIX+"lib/python2.7/site-packages"
  end

  # Where distribute will install executable scripts
  def scripts_folder
    HOMEBREW_PREFIX+"share/python"
  end

  def test
    # See: https://github.com/mxcl/homebrew/pull/10487
    `#{bin}/python -c 'from decimal import Decimal; print Decimal(4) / Decimal(2)'`.chomp == '2'
  end
end
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