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require 'rubygems/command'
require 'rubygems/local_remote_options'
require 'rubygems/version_option'
class Gem::Commands::FetchCommand < Gem::Command
include Gem::LocalRemoteOptions
include Gem::VersionOption
def initialize
super 'fetch', 'Download a gem and place it in the current directory'
add_bulk_threshold_option
add_proxy_option
add_source_option
add_clear_sources_option
add_version_option
add_platform_option
add_prerelease_option
end
def arguments # :nodoc:
'GEMNAME name of gem to download'
end
def defaults_str # :nodoc:
"--version '#{Gem::Requirement.default}'"
end
def description # :nodoc:
<<-EOF
The fetch command fetches gem files that can be stored for later use or
unpacked to examine their contents.
See the build command help for an example of unpacking a gem, modifying it,
then repackaging it.
EOF
end
def usage # :nodoc:
"#{program_name} GEMNAME [GEMNAME ...]"
end
def execute
version = options[:version] || Gem::Requirement.default
platform = Gem.platforms.last
gem_names = get_all_gem_names
gem_names.each do |gem_name|
dep = Gem::Dependency.new gem_name, version
dep.prerelease = options[:prerelease]
specs_and_sources, errors =
Gem::SpecFetcher.fetcher.spec_for_dependency dep
if platform then
filtered = specs_and_sources.select { |s,| s.platform == platform }
specs_and_sources = filtered unless filtered.empty?
end
spec, source = specs_and_sources.max_by { |s,| s.version }
if spec.nil? then
show_lookup_failure gem_name, version, errors, options[:domain]
next
end
source.download spec
say "Downloaded #{spec.full_name}"
end
end
end
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