require 'rubygems/command'
require 'rubygems/builder'
class Gem::Commands::BuildCommand < Gem::Command
def initialize
super 'build', 'Build a gem from a gemspec'
add_option '--force', 'skip validation of the spec' do |value, options|
options[:force] = true
end
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
spec = load_gemspec gemspec
if spec then
Gem::Builder.new(spec).build options[:force]
else
alert_error "Error loading gemspec. Aborting."
terminate_interaction 1
end
else
alert_error "Gemspec file not found: #{gemspec}"
terminate_interaction 1
end
end
def load_gemspec filename
if yaml?(filename)
open(filename) do |f|
begin
Gem::Specification.from_yaml(f)
rescue Gem::EndOfYAMLException
nil
end
end
else
Gem::Specification.load(filename) # can return nil
end
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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