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python_helper: Comment wording

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This commit is contained in:
Samuel John 2013-09-03 10:36:58 +02:00
parent 922a4f1b77
commit 0d75de42bb
1 changed files with 8 additions and 3 deletions
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11
Library/Homebrew/python_helper.rb
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@ -24,7 +24,7 @@ def python_helper(options={:allowed_major_versions => [2, 3]}, &block)
end
end
# Look for PythonInstalled requirements for this formula
# Look for PythonInstalled requirements for this formula:
python_reqs = requirements.select{ |r| r.kind_of?(PythonInstalled) }
if python_reqs.empty?
raise "If you use python in the formula, you have to add `depends_on :python` (or :python3)!"
@ -41,7 +41,7 @@ def python_helper(options={:allowed_major_versions => [2, 3]}, &block)
filtered_python_reqs << py
end
# Allow to use an else-branch like so: `if python do ... end; else ... end`
# Allow to use an else-branch like so: `if python do ... end; else ... end`.
return false if filtered_python_reqs.empty?
# Sort by version, so the older 2.x will be used first and if no
@ -49,18 +49,22 @@ def python_helper(options={:allowed_major_versions => [2, 3]}, &block)
# 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 set the site_packages to the correct value
# Now is the time to `site_packages` to the correct value in the Cellar.
py.site_packages = 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
# Ensure env changes are only temporary:
begin
old_env = ENV.to_hash
# 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
# so that lib points to the HOMEBREW_PREFIX/Cellar/<formula>/<version>/lib
puts "brew: setting PYTHONPATH to: #{py.site_packages}" if ARGV.verbose?
# 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['PYTHONPATH'] = py.site_packages
ENV['PYTHON'] = py.binary
@ -73,6 +77,7 @@ def python_helper(options={:allowed_major_versions => [2, 3]}, &block)
# 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
# we can just return the right python.
@current_python = py
res = instance_eval(&block)
@current_python = nil