diff options
Diffstat (limited to 'lib/rubygems/resolver/molinillo/lib/molinillo/errors.rb')
-rw-r--r-- | lib/rubygems/resolver/molinillo/lib/molinillo/errors.rb | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/lib/rubygems/resolver/molinillo/lib/molinillo/errors.rb b/lib/rubygems/resolver/molinillo/lib/molinillo/errors.rb new file mode 100644 index 0000000000..cc9f636ed5 --- /dev/null +++ b/lib/rubygems/resolver/molinillo/lib/molinillo/errors.rb @@ -0,0 +1,69 @@ +module Gem::Resolver::Molinillo + # An error that occurred during the resolution process + class ResolverError < StandardError; end + + # An error caused by searching for a dependency that is completely unknown, + # i.e. has no versions available whatsoever. + class NoSuchDependencyError < ResolverError + # @return [Object] the dependency that could not be found + attr_accessor :dependency + + # @return [Array<Object>] the specifications that depended upon {#dependency} + attr_accessor :required_by + + # @param [Object] dependency @see {#dependency} + # @param [Array<Object>] required_by @see {#required_by} + def initialize(dependency, required_by = []) + @dependency = dependency + @required_by = required_by + super() + end + + def message + sources = required_by.map { |r| "`#{r}`" }.join(' and ') + message = "Unable to find a specification for `#{dependency}`" + message << " depended upon by #{sources}" unless sources.empty? + message + end + end + + # An error caused by attempting to fulfil a dependency that was circular + # + # @note This exception will be thrown iff a {Vertex} is added to a + # {DependencyGraph} that has a {DependencyGraph::Vertex#path_to?} an + # existing {DependencyGraph::Vertex} + class CircularDependencyError < ResolverError + # [Set<Object>] the dependencies responsible for causing the error + attr_reader :dependencies + + # @param [Array<DependencyGraph::Vertex>] nodes the nodes in the dependency + # that caused the error + def initialize(nodes) + super "There is a circular dependency between #{nodes.map(&:name).join(' and ')}" + @dependencies = nodes.map(&:payload).to_set + end + end + + # An error caused by conflicts in version + class VersionConflict < ResolverError + # @return [{String => Resolution::Conflict}] the conflicts that caused + # resolution to fail + attr_reader :conflicts + + # @param [{String => Resolution::Conflict}] conflicts see {#conflicts} + def initialize(conflicts) + pairs = [] + conflicts.values.flatten.map(&:requirements).flatten.each do |conflicting| + conflicting.each do |source, conflict_requirements| + conflict_requirements.each do |c| + pairs << [c, source] + end + end + end + + super "Unable to satisfy the following requirements:\n\n" \ + "#{pairs.map { |r, d| "- `#{r}` required by `#{d}`" }.join("\n")}" + @conflicts = conflicts + end + end +end |