111 lines
2.7 KiB
Ruby
111 lines
2.7 KiB
Ruby
require 'rubygems/command'
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class Gem::Commands::LockCommand < Gem::Command
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def initialize
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super 'lock', 'Generate a lockdown list of gems',
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:strict => false
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add_option '-s', '--[no-]strict',
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'fail if unable to satisfy a dependency' do |strict, options|
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options[:strict] = strict
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end
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end
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def arguments # :nodoc:
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"GEMNAME name of gem to lock\nVERSION version of gem to lock"
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end
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def defaults_str # :nodoc:
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"--no-strict"
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end
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def description # :nodoc:
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<<-EOF
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The lock command will generate a list of +gem+ statements that will lock down
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the versions for the gem given in the command line. It will specify exact
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versions in the requirements list to ensure that the gems loaded will always
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be consistent. A full recursive search of all effected gems will be
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generated.
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Example:
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gemlock rails-1.0.0 > lockdown.rb
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will produce in lockdown.rb:
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require "rubygems"
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gem 'rails', '= 1.0.0'
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gem 'rake', '= 0.7.0.1'
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gem 'activesupport', '= 1.2.5'
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gem 'activerecord', '= 1.13.2'
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gem 'actionpack', '= 1.11.2'
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gem 'actionmailer', '= 1.1.5'
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gem 'actionwebservice', '= 1.0.0'
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Just load lockdown.rb from your application to ensure that the current
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versions are loaded. Make sure that lockdown.rb is loaded *before* any
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other require statements.
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Notice that rails 1.0.0 only requires that rake 0.6.2 or better be used.
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Rake-0.7.0.1 is the most recent version installed that satisfies that, so we
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lock it down to the exact version.
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EOF
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end
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def usage # :nodoc:
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"#{program_name} GEMNAME-VERSION [GEMNAME-VERSION ...]"
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end
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def complain(message)
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if options[:strict] then
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raise Gem::Exception, message
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else
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say "# #{message}"
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end
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end
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def execute
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say "require 'rubygems'"
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locked = {}
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pending = options[:args]
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until pending.empty? do
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full_name = pending.shift
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spec = Gem::SourceIndex.load_specification spec_path(full_name)
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if spec.nil? then
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complain "Could not find gem #{full_name}, try using the full name"
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next
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end
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say "gem '#{spec.name}', '= #{spec.version}'" unless locked[spec.name]
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locked[spec.name] = true
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spec.runtime_dependencies.each do |dep|
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next if locked[dep.name]
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candidates = Gem.source_index.search dep
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if candidates.empty? then
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complain "Unable to satisfy '#{dep}' from currently installed gems"
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else
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pending << candidates.last.full_name
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end
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end
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end
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end
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def spec_path(gem_full_name)
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gemspecs = Gem.path.map do |path|
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File.join path, "specifications", "#{gem_full_name}.gemspec"
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end
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gemspecs.find { |gemspec| File.exist? gemspec }
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end
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end
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