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require 'rubygems/command'
require 'rubygems/package'
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 description # :nodoc:
<<-EOF
The build command allows you to create a gem from a ruby gemspec.
The best way to build a gem is to use a Rakefile and the Gem::PackageTask
which ships with RubyGems.
The gemspec can either be created by hand or extracted from an existing gem
with gem spec:
$ gem unpack my_gem-1.0.gem
Unpacked gem: '.../my_gem-1.0'
$ gem spec my_gem-1.0.gem --ruby > my_gem-1.0/my_gem-1.0.gemspec
$ cd my_gem-1.0
[edit gem contents]
$ gem build my_gem-1.0.gemspec
EOF
end
def usage # :nodoc:
"#{program_name} GEMSPEC_FILE"
end
def execute
gemspec = get_one_gem_name
if File.exist? gemspec then
spec = Gem::Specification.load gemspec
if spec then
Gem::Package.build spec, 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
end
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