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require "language/python"
class PythonRequirement < Requirement
fatal true
default_formula "python"
satisfy build_env: false do
python = which_python
next unless python
next unless short_version
# Always use Python 2.7 for consistency on older versions of Mac OS X.
short_version == Version.create("2.7")
end
env do
if !system_python? && short_version == Version.create("2.7")
ENV.prepend_path "PATH", which_python.dirname
end
# Homebrew Python should take precedence over other Pythons in the PATH
ENV.prepend_path "PATH", Formula["python"].opt_bin
ENV.prepend_path "PATH", Formula["python"].opt_libexec/"bin"
if system_python?
ENV["PYTHONPATH"] = "#{HOMEBREW_PREFIX}/lib/python#{short_version}/site-packages"
end
end
private
def short_version
@short_version ||= Language::Python.major_minor_version which_python
end
def which_python
python = which python_binary
return unless python
Pathname.new Utils.popen_read(python, "-c", "import sys; print(sys.executable)").strip
end
def system_python
"/usr/bin/#{python_binary}"
end
def system_python?
system_python == which_python.to_s
end
def python_binary
"python2.7"
end
# Deprecated
alias to_s python_binary
end
class Python3Requirement < PythonRequirement
fatal true
default_formula "python3"
satisfy(build_env: false) { which_python }
private
def python_binary
"python3"
end
end
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