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require 'rubygems/command'
require 'rubygems/local_remote_options'
require 'rubygems/source_info_cache'
require 'rubygems/version_option'
class Gem::Commands::QueryCommand < Gem::Command
include Gem::LocalRemoteOptions
include Gem::VersionOption
def initialize(name = 'query',
summary = 'Query gem information in local or remote repositories')
super name, summary,
:name => //, :domain => :local, :details => false, :versions => true,
:installed => false, :version => Gem::Requirement.default
add_option('-i', '--[no-]installed',
'Check for installed gem') do |value, options|
options[:installed] = value
end
add_version_option
add_option('-n', '--name-matches REGEXP',
'Name of gem(s) to query on matches the',
'provided REGEXP') do |value, options|
options[:name] = /#{value}/i
end
add_option('-d', '--[no-]details',
'Display detailed information of gem(s)') do |value, options|
options[:details] = value
end
add_option( '--[no-]versions',
'Display only gem names') do |value, options|
options[:versions] = value
options[:details] = false unless value
end
add_option('-a', '--all',
'Display all gem versions') do |value, options|
options[:all] = value
end
add_local_remote_options
end
def defaults_str # :nodoc:
"--local --name-matches // --no-details --versions --no-installed"
end
def execute
exit_code = 0
name = options[:name]
if options[:installed] then
if name.source.empty? then
alert_error "You must specify a gem name"
exit_code |= 4
elsif installed? name.source, options[:version] then
say "true"
else
say "false"
exit_code |= 1
end
raise Gem::SystemExitException, exit_code
end
if local? then
say
say "*** LOCAL GEMS ***"
say
output_query_results Gem.source_index.search(name)
end
if remote? then
say
say "*** REMOTE GEMS ***"
say
all = options[:all]
begin
Gem::SourceInfoCache.cache all
rescue Gem::RemoteFetcher::FetchError
# no network
end
output_query_results Gem::SourceInfoCache.search(name, false, all)
end
end
private
##
# Check if gem +name+ version +version+ is installed.
def installed?(name, version = Gem::Requirement.default)
dep = Gem::Dependency.new name, version
!Gem.source_index.search(dep).empty?
end
def output_query_results(gemspecs)
output = []
gem_list_with_version = {}
gemspecs.flatten.each do |gemspec|
gem_list_with_version[gemspec.name] ||= []
gem_list_with_version[gemspec.name] << gemspec
end
gem_list_with_version = gem_list_with_version.sort_by do |name, spec|
name.downcase
end
gem_list_with_version.each do |gem_name, list_of_matching|
list_of_matching = list_of_matching.sort_by { |x| x.version.to_ints }.reverse
seen_versions = {}
list_of_matching.delete_if do |item|
if seen_versions[item.version] then
true
else
seen_versions[item.version] = true
false
end
end
entry = gem_name.dup
if options[:versions] then
versions = list_of_matching.map { |s| s.version }.uniq
entry << " (#{versions.join ', '})"
end
entry << "\n" << format_text(list_of_matching[0].summary, 68, 4) if
options[:details]
output << entry
end
say output.join(options[:details] ? "\n\n" : "\n")
end
##
# Used for wrapping and indenting text
def format_text(text, wrap, indent=0)
result = []
work = text.dup
while work.length > wrap
if work =~ /^(.{0,#{wrap}})[ \n]/o then
result << $1
work.slice!(0, $&.length)
else
result << work.slice!(0, wrap)
end
end
result << work if work.length.nonzero?
result.join("\n").gsub(/^/, " " * indent)
end
end
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