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# frozen_string_literal: true
require_relative "../command"
require_relative "../local_remote_options"
require_relative "../version_option"
class Gem::Commands::FetchCommand < Gem::Command
include Gem::LocalRemoteOptions
include Gem::VersionOption
def initialize
defaults = {
suggest_alternate: true,
version: Gem::Requirement.default,
}
super "fetch", "Download a gem and place it in the current directory", defaults
add_bulk_threshold_option
add_proxy_option
add_source_option
add_clear_sources_option
add_version_option
add_platform_option
add_prerelease_option
add_option "--[no-]suggestions", "Suggest alternates when gems are not found" do |value, options|
options[:suggest_alternate] = value
end
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 check_version # :nodoc:
if options[:version] != Gem::Requirement.default &&
get_all_gem_names.size > 1
alert_error "Can't use --version with multiple gems. You can specify multiple gems with" \
" version requirements using `gem fetch 'my_gem:1.0.0' 'my_other_gem:~>2.0.0'`"
terminate_interaction 1
end
end
def execute
check_version
version = options[:version]
platform = Gem.platforms.last
gem_names = get_all_gem_names_and_versions
gem_names.each do |gem_name, gem_version|
gem_version ||= version
dep = Gem::Dependency.new gem_name, gem_version
dep.prerelease = options[:prerelease]
suppress_suggestions = !options[:suggest_alternate]
specs_and_sources, errors =
Gem::SpecFetcher.fetcher.spec_for_dependency dep
if platform
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 }
if spec.nil?
show_lookup_failure gem_name, gem_version, errors, suppress_suggestions, options[:domain]
next
end
source.download spec
say "Downloaded #{spec.full_name}"
end
end
end
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