require 'rubygems/command'
require 'rubygems/builder'
class Gem::Commands::BuildCommand < Gem::Command
def initialize
super('build', 'Build a gem from a gemspec')
end
def arguments # :nodoc:
"GEMSPEC_FILE gemspec file name to build a gem for"
end
def usage # :nodoc:
"#{program_name} GEMSPEC_FILE"
end
def execute
gemspec = get_one_gem_name
if File.exist?(gemspec)
specs = load_gemspecs(gemspec)
specs.each do |spec|
Gem::Builder.new(spec).build
end
else
alert_error "Gemspec file not found: #{gemspec}"
end
end
def load_gemspecs(filename)
if yaml?(filename)
result = []
open(filename) do |f|
begin
while not f.eof? and spec = Gem::Specification.from_yaml(f)
result << spec
end
rescue Gem::EndOfYAMLException => e
# OK
end
end
else
result = [Gem::Specification.load(filename)]
end
result
end
def yaml?(filename)
line = open(filename) { |f| line = f.gets }
result = line =~ %r{!ruby/object:Gem::Specification}
result
end
end
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