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require 'formula'
<<-COMMENTS
Options
-------
There are a few options for customzing the build.
--universal: Builds combined 32-/64-bit Intel binaries.
--framework: Builds a "Framework" version of Python.
--static: Builds static instead of shared libraries.
site-packages
-------------
The "site-packages" folder lives in the Cellar, under the "lib" folder
for normal builds, and under the "Frameworks" folder for Framework builds.
A .pth file is added to the Cellar site-packages that adds the corresponding
HOMEBREW_PREFIX folder (/usr/local/lib/python2.6/site-packages by default)
to sys.path. Note that this alternate folder doesn't itself support .pth files.
pip / distribute
----------------
The pip (and distribute) formulae in Homebrew are designed only to work
against a Homebrew-installed Python, though they provide links for
manually installing against a custom Python.
pip and distribute are installed directly into the Cellar site-packages,
since they need to install to a place that supports .pth files.
The pip & distribute formuale use the "site_packages" method defined here
to get the appropriate site-packages path.
COMMENTS
# 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 Python26 < Formula
url 'http://www.python.org/ftp/python/2.6.7/Python-2.6.7.tgz'
homepage 'http://www.python.org/'
md5 'af474f85a3af69ea50438a2a48039d7d'
depends_on 'sqlite' => :optional # Prefer over OS X's older version
depends_on 'readline' => :optional # Prefer over OS X's libedit
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 site_packages
# The Cellar location of site-packages
if as_framework?
# If we're installed or installing as a Framework, then use that location.
return prefix+"Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages"
else
# Otherwise, use just the lib path.
return lib+"python2.6/site-packages"
end
end
def prefix_site_packages
# The HOMEBREW_PREFIX location of site-packages
HOMEBREW_PREFIX+"lib/python2.6/site-packages"
end
def validate_options
if build_framework? and ARGV.include? "--static"
onoe "Cannot specify both framework and static."
exit 99
end
end
def install
validate_options
args = ["--prefix=#{prefix}"]
if ARGV.include? '--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
system "./configure", *args
system "make"
ENV.j1 # Some kinds of installs must be serialized.
system "make install"
# Add the Homebrew prefix path to site-packages via a .pth
prefix_site_packages.mkpath
(site_packages+"homebrew.pth").write prefix_site_packages
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,
such as:
mkdir ~/Frameworks
ln -s "#{prefix}/Frameworks/Python.framework" ~/Frameworks
EOS
site_caveats = <<-EOS.undent
The site-packages folder for this Python is:
#{site_packages}
We've added a "homebrew.pth" file to also include:
#{prefix_site_packages}
EOS
general_caveats = <<-EOS.undent
You may want to create a "virtual environment" using this Python as a base
so you can manage multiple independent site-packages. See:
http://pypi.python.org/pypi/virtualenv
If you install Python packages via pip, binaries will be installed under
Python's cellar but not automatically linked into the Homebrew prefix.
You may want to add Python's bin folder to your PATH as well:
#{bin}
EOS
s = site_caveats+general_caveats
s = framework_caveats + s if as_framework?
return s
end
end
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