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factory: always check const_defined? before requiring

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Specifying dependencies with a URL works, even if by accident, but
factory is called repeatedly on this URL and this results in multiple
downloads of the same file.

Fix this by checking const_defined? here too, and DRY up the code a bit.

Fixes Homebrew/homebrew#14285.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
This commit is contained in:
Jack Nagel 2012-08-23 14:33:33 -05:00
parent ad0dd3d3de
commit fd151f8999
1 changed files with 14 additions and 12 deletions
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26
Library/Homebrew/formula.rb
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@ -358,14 +358,15 @@ class Formula
if name =~ %r[(https?|ftp)://]
url = name
name = Pathname.new(name).basename
target_file = HOMEBREW_CACHE_FORMULA+name
path = HOMEBREW_CACHE_FORMULA+name
name = name.basename(".rb").to_s
HOMEBREW_CACHE_FORMULA.mkpath
FileUtils.rm target_file, :force => true
curl url, '-o', target_file
unless Object.const_defined? self.class_s(name)
HOMEBREW_CACHE_FORMULA.mkpath
FileUtils.rm path, :force => true
curl url, '-o', path
end
require target_file
install_type = :from_url
else
name = Formula.canonical_name(name)
@ -378,20 +379,21 @@ class Formula
path = Pathname.new(name)
name = path.stem
require path unless Object.const_defined? self.class_s(name)
install_type = :from_path
target_file = path.to_s
else
# For names, map to the path and then require
require Formula.path(name) unless Object.const_defined? self.class_s(name)
path = Formula.path(name)
install_type = :from_name
end
end
klass_name = self.class_s(name)
unless Object.const_defined? klass_name
puts "#{$0}: loading #{path}" if ARGV.debug?
require path
end
begin
klass_name = self.class_s(name)
klass = Object.const_get klass_name
rescue NameError
# TODO really this text should be encoded into the exception
@ -402,7 +404,7 @@ class Formula
end
return klass.new(name) if install_type == :from_name
return klass.new(name, target_file)
return klass.new(name, path.to_s)
rescue LoadError, NameError
raise FormulaUnavailableError.new(name)
end