Class: Gem::SpecFetcher
- Inherits:
-
Object
- Object
- Gem::SpecFetcher
- Includes:
- Text, UserInteraction
- Defined in:
- lib/rubygems/spec_fetcher.rb
Overview
SpecFetcher handles metadata updates from remote gem repositories.
Instance Attribute Summary collapse
-
#latest_specs ⇒ Object
readonly
Cache of latest specs.
-
#prerelease_specs ⇒ Object
readonly
Cache of prerelease specs.
-
#sources ⇒ Object
readonly
Sources for this SpecFetcher.
-
#specs ⇒ Object
readonly
Cache of all released specs.
Class Method Summary collapse
-
.fetcher ⇒ Object
Default fetcher instance.
-
.fetcher=(fetcher) ⇒ Object
:nodoc:.
Instance Method Summary collapse
-
#available_specs(type) ⇒ Object
Returns a list of gems available for each source in Gem::sources.
-
#detect(type = :complete) ⇒ Object
Return all gem name tuples who’s names match
obj
. -
#initialize(sources = nil) ⇒ SpecFetcher
constructor
Creates a new SpecFetcher.
-
#search_for_dependency(dependency, matching_platform = true) ⇒ Object
Find and fetch gem name tuples that match
dependency
. -
#spec_for_dependency(dependency, matching_platform = true) ⇒ Object
Find and fetch specs that match
dependency
. -
#suggest_gems_from_name(gem_name) ⇒ Object
Suggests gems based on the supplied
gem_name
. -
#tuples_for(source, type, gracefully_ignore = false) ⇒ Object
Retrieves NameTuples from
source
of the giventype
(:prerelease, etc.).
Methods included from Text
#format_text, #levenshtein_distance
Methods included from UserInteraction
#alert, #alert_error, #alert_warning, #ask, #ask_for_password, #ask_yes_no, #choose_from_list, #say, #terminate_interaction
Methods included from DefaultUserInteraction
ui, #ui, ui=, #ui=, use_ui, #use_ui
Constructor Details
#initialize(sources = nil) ⇒ SpecFetcher
Creates a new SpecFetcher. Ordinarily you want to use the default fetcher from Gem::SpecFetcher::fetcher which uses the Gem.sources.
If you need to retrieve specifications from a different source
, you can send it as an argument.
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# File 'lib/rubygems/spec_fetcher.rb', line 56 def initialize sources = nil @sources = sources || Gem.sources @update_cache = begin File.stat(Gem.user_home).uid == Process.uid rescue Errno::EACCES, Errno::ENOENT false end @specs = {} @latest_specs = {} @prerelease_specs = {} @caches = { :latest => @latest_specs, :prerelease => @prerelease_specs, :released => @specs, } @fetcher = Gem::RemoteFetcher.fetcher end |
Instance Attribute Details
#latest_specs ⇒ Object (readonly)
Cache of latest specs
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# File 'lib/rubygems/spec_fetcher.rb', line 18 def latest_specs @latest_specs end |
#prerelease_specs ⇒ Object (readonly)
Cache of prerelease specs
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# File 'lib/rubygems/spec_fetcher.rb', line 33 def prerelease_specs @prerelease_specs end |
#sources ⇒ Object (readonly)
Sources for this SpecFetcher
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# File 'lib/rubygems/spec_fetcher.rb', line 23 def sources @sources end |
#specs ⇒ Object (readonly)
Cache of all released specs
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# File 'lib/rubygems/spec_fetcher.rb', line 28 def specs @specs end |
Class Method Details
.fetcher ⇒ Object
Default fetcher instance. Use this instead of ::new to reduce object allocation.
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# File 'lib/rubygems/spec_fetcher.rb', line 41 def self.fetcher @fetcher ||= new end |
.fetcher=(fetcher) ⇒ Object
:nodoc:
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# File 'lib/rubygems/spec_fetcher.rb', line 45 def self.fetcher=(fetcher) # :nodoc: @fetcher = fetcher end |
Instance Method Details
#available_specs(type) ⇒ Object
Returns a list of gems available for each source in Gem::sources.
type
can be one of 3 values: :released => Return the list of all released specs :complete => Return the list of all specs :latest => Return the list of only the highest version of each gem :prerelease => Return the list of all prerelease only specs
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# File 'lib/rubygems/spec_fetcher.rb', line 218 def available_specs(type) errors = [] list = {} @sources.each_source do |source| begin names = case type when :latest tuples_for source, :latest when :released tuples_for source, :released when :complete names = tuples_for(source, :prerelease, true) + tuples_for(source, :released) names.sort when :abs_latest names = tuples_for(source, :prerelease, true) + tuples_for(source, :latest) names.sort when :prerelease tuples_for(source, :prerelease) else raise Gem::Exception, "Unknown type - :#{type}" end rescue Gem::RemoteFetcher::FetchError => e errors << Gem::SourceFetchProblem.new(source, e) else list[source] = names end end [list, errors] end |
#detect(type = :complete) ⇒ Object
Return all gem name tuples who’s names match obj
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# File 'lib/rubygems/spec_fetcher.rb', line 144 def detect(type=:complete) tuples = [] list, _ = available_specs(type) list.each do |source, specs| specs.each do |tup| if yield(tup) tuples << [tup, source] end end end tuples end |
#search_for_dependency(dependency, matching_platform = true) ⇒ Object
Find and fetch gem name tuples that match dependency
.
If matching_platform
is false, gems for all platforms are returned.
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# File 'lib/rubygems/spec_fetcher.rb', line 85 def search_for_dependency(dependency, matching_platform=true) found = {} rejected_specs = {} if dependency.prerelease? if dependency.specific? type = :complete else type = :abs_latest end elsif dependency.latest_version? type = :latest else type = :released end list, errors = available_specs(type) list.each do |source, specs| if dependency.name.is_a?(String) && specs.respond_to?(:bsearch) start_index = (0 ... specs.length).bsearch{ |i| specs[i].name >= dependency.name } end_index = (0 ... specs.length).bsearch{ |i| specs[i].name > dependency.name } specs = specs[start_index ... end_index] if start_index && end_index end found[source] = specs.select do |tup| if dependency.match?(tup) if matching_platform and !Gem::Platform.match(tup.platform) pm = ( rejected_specs[dependency] ||= \ Gem::PlatformMismatch.new(tup.name, tup.version)) pm.add_platform tup.platform false else true end end end end errors += rejected_specs.values tuples = [] found.each do |source, specs| specs.each do |s| tuples << [s, source] end end tuples = tuples.sort_by { |x| x[0] } return [tuples, errors] end |
#spec_for_dependency(dependency, matching_platform = true) ⇒ Object
Find and fetch specs that match dependency
.
If matching_platform
is false, gems for all platforms are returned.
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# File 'lib/rubygems/spec_fetcher.rb', line 165 def spec_for_dependency(dependency, matching_platform=true) tuples, errors = search_for_dependency(dependency, matching_platform) specs = [] tuples.each do |tup, source| begin spec = source.fetch_spec(tup) rescue Gem::RemoteFetcher::FetchError => e errors << Gem::SourceFetchProblem.new(source, e) else specs << [spec, source] end end return [specs, errors] end |
#suggest_gems_from_name(gem_name) ⇒ Object
Suggests gems based on the supplied gem_name
. Returns an array of alternative gem names.
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# File 'lib/rubygems/spec_fetcher.rb', line 186 def suggest_gems_from_name gem_name gem_name = gem_name.downcase.tr('_-', '') max = gem_name.size / 2 names = available_specs(:complete).first.values.flatten(1) matches = names.map { |n| next unless n.match_platform? distance = levenshtein_distance gem_name, n.name.downcase.tr('_-', '') next if distance >= max return [n.name] if distance == 0 [n.name, distance] }.compact matches = matches.uniq.sort_by { |name, dist| dist } matches.first(5).map { |name, dist| name } end |
#tuples_for(source, type, gracefully_ignore = false) ⇒ Object
Retrieves NameTuples from source
of the given type
(:prerelease, etc.). If gracefully_ignore
is true, errors are ignored.
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# File 'lib/rubygems/spec_fetcher.rb', line 260 def tuples_for(source, type, gracefully_ignore=false) # :nodoc: cache = @caches[type] tuples = begin cache[source.uri] ||= source.load_specs(type).sort_by { |tup| tup.name } rescue Gem::RemoteFetcher::FetchError raise unless gracefully_ignore [] end tuples end |