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Diffstat (limited to 'Library/Homebrew/python_helper.rb')
| -rw-r--r-- | Library/Homebrew/python_helper.rb | 90 |
1 files changed, 0 insertions, 90 deletions
diff --git a/Library/Homebrew/python_helper.rb b/Library/Homebrew/python_helper.rb deleted file mode 100644 index a8389cee7..000000000 --- a/Library/Homebrew/python_helper.rb +++ /dev/null @@ -1,90 +0,0 @@ -# This helper method is used in the Formula class when the user calls -# `python`, `python2` or `python3`. - -# This method has a dual nature. For one, it takes a &block and sets up -# the ENV such that a Python, as defined in the requirements, is the default. -# If there are multiple `PythonDependency` requirements, the block is evaluated -# once for each Python. This makes it possible to easily support 2.x and -# 3.x Python bindings without code duplication in formulae. -# If you need to special case stuff, set :allowed_major_versions. -# Second, inside the block, a formula author may call this method to access -# certain convienience methods for the currently selected Python, e.g. -# `python.site_packages`. -# This method should be executed in the context of the formula, so that -# prefix is defined. Note, that this method will set @current_python to be -# able to refer to the current python if a block is executed for 2.x and 3.x. -def python_helper(options={:allowed_major_versions => [2, 3]}, &block) - if !block_given? and !@current_python.nil? - # We are already inside of a `python do ... end` block, so just return - # the current_python or nil if the version.major is not allowed. - if options[:allowed_major_versions].include?(@current_python.version.major) - return @current_python - else - return nil - end - end - - # Look for PythonDependency requirements for this formula: - python_reqs = requirements.select{ |r| r.kind_of?(PythonDependency) } - if python_reqs.empty? - raise "If you use python in the formula, you have to add `depends_on :python` (or :python3)!" - end - # Now select those that are satisfied and matching the version.major and - # check that no two python binaries are the same (which could be the case - # because more than one `depends_on :python => 'module_name' may be present). - filtered_python_reqs = [] - python_reqs.each do |py| - next if filtered_python_reqs.any? { |req| req.binary == py.binary } - next unless py.satisfied? - next unless options[:allowed_major_versions].include?(py.version.major) - next if (py.optional? || py.recommended?) && build.without?(py.name) - filtered_python_reqs << py - end - - # Allow to use an else-branch like so: `if python do ... end; else ... end`. - return nil if filtered_python_reqs.empty? - - # Sort by version, so the older 2.x will be used first and if no - # block_given? then 2.x is preferred because it is returned. - # Further note, having 3.x last allows us to run `2to3 --write .` - # which modifies the sources in-place (for some packages that need this). - filtered_python_reqs.sort_by{ |py| py.version }.map do |py| - # Now is the time to `site_packages` to the correct value in the Cellar. - py.site_packages = lib/py.xy/'site-packages' - py.private_site_packages = libexec/"lib"/py.xy/"site-packages" - return py if !block_given? - - puts "brew: Python block (#{py.binary})..." if ARGV.verbose? && ARGV.debug? - # Ensure env changes are only temporary: - old_env = ENV.to_hash - begin - # In order to install into the `Cellar`, the dir must exist and be in the - # `PYTHONPATH`. This will be executed in the context of the formula and - # lib points to the `HOMEBREW_PREFIX/Cellar/<formula>/<version>/lib`. - mkdir_p py.site_packages - ENV.append_path 'PYTHONPATH', py.site_packages - # Allow to --prefix=libexec if a private site-packages is needed. - mkdir_p py.private_site_packages - ENV.append_path 'PYTHONPATH', py.private_site_packages - puts "brew: PYTHONPATH=#{ENV['PYTHONPATH']}" if ARGV.verbose? - ENV['PYTHON'] = py.binary - ENV.prepend_path 'CMAKE_INCLUDE_PATH', py.incdir - ENV.prepend_path 'PKG_CONFIG_PATH', py.pkg_config_path if py.pkg_config_path - ENV.prepend_path 'PATH', py.binary.dirname unless py.from_osx? - #Note: Don't set LDFLAGS to point to the Python.framework, because - # it breaks builds (for example scipy.) - - # Track the state of the currently selected python for this block, - # so if this python_helper is called again _inside_ the block, - # we can just return the right python. - @current_python = py - res = instance_eval(&block) - @current_python = nil - res - ensure - # Clean up if the private_site_packages has not been used. - py.private_site_packages.rmdir if py.private_site_packages.children.empty? - ENV.replace(old_env) - end - end -end |