154 lines
4.5 KiB
Ruby
154 lines
4.5 KiB
Ruby
require 'formula'
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<<-COMMENTS
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Versions
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--------
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This formula is currently tracking version 2.7.x.
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Python 3.x is available as a separate formula:
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brew install python3
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Options
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-------
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There are a few options for customzing the build.
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--universal: Builds combined 32-/64-bit Intel binaries.
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--framework: Builds a "Framework" version of Python.
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--static: Builds static instead of shared libraries.
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site-packages
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-------------
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The "site-packages" folder lives in the Cellar, under the "lib" folder
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for normal builds, and under the "Frameworks" folder for Framework builds.
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A .pth file is added to the Cellar site-packages that adds the corresponding
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HOMEBREW_PREFIX folder (/usr/local/lib/python2.7/site-packages by default)
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to sys.path. Note that this alternate folder doesn't itself support .pth files.
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pip / distribute
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----------------
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The pip (and distribute) formulae in Homebrew are designed only to work
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against a Homebrew-installed Python, though they provide links for
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manually installing against a custom Python.
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pip and distribute are installed directly into the Cellar site-packages,
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since they need to install to a place that supports .pth files.
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The pip & distribute formuale use the "site_packages" method defined here
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to get the appropriate site-packages path.
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COMMENTS
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# Was a Framework build requested?
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def build_framework?; ARGV.include? '--framework'; end
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# Are we installed or installing as a Framework?
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def as_framework?
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(self.installed? and File.exists? prefix+"Frameworks/Python.framework") or build_framework?
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end
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class Python <Formula
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url 'http://www.python.org/ftp/python/2.7/Python-2.7.tar.bz2'
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homepage 'http://www.python.org/'
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md5 '0e8c9ec32abf5b732bea7d91b38c3339'
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depends_on 'readline' => :optional # Prefer over OS X's libedit
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depends_on 'sqlite' => :optional # Prefer over OS X's older version
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depends_on 'gdbm' => :optional
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def options
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[
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["--framework", "Do a 'Framework' build instead of a UNIX-style build."],
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["--universal", "Build for both 32 & 64 bit Intel."],
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["--static", "Build static libraries."]
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]
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end
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# Skip binaries so modules will load; skip lib because it is mostly Python files
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skip_clean ['bin', 'lib']
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def site_packages
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# The Cellar location of site-packages
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if as_framework?
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# If we're installed or installing as a Framework, then use that location.
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return prefix+"Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages"
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else
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# Otherwise, use just the lib path.
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return lib+"python2.7/site-packages"
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end
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end
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def prefix_site_packages
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# The HOMEBREW_PREFIX location of site-packages
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HOMEBREW_PREFIX+"lib/python2.7/site-packages"
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end
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def validate_options
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if build_framework? and ARGV.include? "--static"
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onoe "Cannot specify both framework and static."
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exit 99
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end
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end
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def install
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validate_options
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args = ["--prefix=#{prefix}"]
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if ARGV.include? '--universal'
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args << "--enable-universalsdk=/" << "--with-universal-archs=intel"
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end
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if build_framework?
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args << "--enable-framework=#{prefix}/Frameworks"
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else
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args << "--enable-shared" unless ARGV.include? '--static'
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end
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system "./configure", *args
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system "make"
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ENV.j1 # Installs must be serialized
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system "make install"
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# Add the Homebrew prefix path to site-packages via a .pth
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prefix_site_packages.mkpath
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(site_packages+"homebrew.pth").write prefix_site_packages
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end
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def caveats
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framework_caveats = <<-EOS.undent
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Framework Python was installed to:
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#{prefix}/Frameworks/Python.framework
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You may want to symlink this Framework to a standard OS X location,
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such as:
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mkdir ~/Frameworks
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ln -s "#{prefix}/Frameworks/Python.framework" ~/Frameworks
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EOS
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site_caveats = <<-EOS.undent
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The site-packages folder for this Python is:
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#{site_packages}
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We've added a "homebrew.pth" file to also include:
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#{prefix_site_packages}
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EOS
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general_caveats = <<-EOS.undent
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You may want to create a "virtual environment" using this Python as a base
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so you can manage multiple independent site-packages. See:
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http://pypi.python.org/pypi/virtualenv
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If you install Python packages via pip, binaries will be installed under
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Python's cellar but not automatically linked into the Homebrew prefix.
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You may want to add Python's bin folder to your PATH as well:
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#{bin}
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EOS
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s = site_caveats+general_caveats
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s = framework_caveats + s if as_framework?
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return s
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end
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end
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