download(spec, source_uri, install_dir = Gem.dir)
public
Moves the gem spec from source_uri to the cache dir
unless it is already there. If the source_uri is local the gem cache dir
copy is always replaced.
Show source
def download(spec, source_uri, install_dir = Gem.dir)
cache_dir =
if Dir.pwd == install_dir then
install_dir
elsif File.writable? install_dir then
File.join install_dir, "cache"
else
File.join Gem.user_dir, "cache"
end
gem_file_name = File.basename spec.cache_file
local_gem_path = File.join cache_dir, gem_file_name
FileUtils.mkdir_p cache_dir rescue nil unless File.exist? cache_dir
unless source_uri.is_a?(URI::Generic)
begin
source_uri = URI.parse(source_uri)
rescue
source_uri = URI.parse(URI.const_defined?(:DEFAULT_PARSER) ?
URI::DEFAULT_PARSER.escape(source_uri.to_s) :
URI.escape(source_uri.to_s))
end
end
scheme = source_uri.scheme
scheme = nil if scheme =~ /^[a-z]$/
case scheme
when 'http', 'https' then
unless File.exist? local_gem_path then
begin
say "Downloading gem #{gem_file_name}" if
Gem.configuration.really_verbose
remote_gem_path = source_uri + "gems/#{gem_file_name}"
self.cache_update_path remote_gem_path, local_gem_path
rescue Gem::RemoteFetcher::FetchError
raise if spec.original_platform == spec.platform
alternate_name = "#{spec.original_name}.gem"
say "Failed, downloading gem #{alternate_name}" if
Gem.configuration.really_verbose
remote_gem_path = source_uri + "gems/#{alternate_name}"
self.cache_update_path remote_gem_path, local_gem_path
end
end
when 'file' then
begin
path = source_uri.path
path = File.dirname(path) if File.extname(path) == '.gem'
remote_gem_path = correct_for_windows_path(File.join(path, 'gems', gem_file_name))
FileUtils.cp(remote_gem_path, local_gem_path)
rescue Errno::EACCES
local_gem_path = source_uri.to_s
end
say "Using local gem #{local_gem_path}" if
Gem.configuration.really_verbose
when nil then
source_path = if Gem.win_platform? && source_uri.scheme &&
!source_uri.path.include?(':') then
"#{source_uri.scheme}:#{source_uri.path}"
else
source_uri.path
end
source_path = Gem::UriFormatter.new(source_path).unescape
begin
FileUtils.cp source_path, local_gem_path unless
File.identical?(source_path, local_gem_path)
rescue Errno::EACCES
local_gem_path = source_uri.to_s
end
say "Using local gem #{local_gem_path}" if
Gem.configuration.really_verbose
else
raise ArgumentError, "unsupported URI scheme #{source_uri.scheme}"
end
local_gem_path
end