This commit is contained in:
@@ -0,0 +1,656 @@
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# frozen_string_literal: true
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module Bundler
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#
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# This class implements the interface needed by PubGrub for resolution. It is
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# equivalent to the `PubGrub::BasicPackageSource` class provided by PubGrub by
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# default and used by the most simple PubGrub consumers.
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#
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class Resolver
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require_relative "vendored_pub_grub"
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require_relative "resolver/base"
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require_relative "resolver/candidate"
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require_relative "resolver/incompatibility"
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require_relative "resolver/root"
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require_relative "resolver/strategy"
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attr_reader :cooldown_skipped
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def initialize(base, gem_version_promoter, most_specific_locked_platform = nil)
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@source_requirements = base.source_requirements
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@base = base
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@gem_version_promoter = gem_version_promoter
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@most_specific_locked_platform = most_specific_locked_platform
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@cooldown_skipped = []
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@cooldown_skipped_specs = {}
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end
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def start
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@requirements = @base.requirements
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@packages = @base.packages
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root, logger = setup_solver
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Bundler.ui.info "Resolving dependencies...", true
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solve_versions(root: root, logger: logger)
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end
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def setup_solver
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root = Resolver::Root.new(name_for_explicit_dependency_source)
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root_version = Resolver::Candidate.new(0)
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@cooldown_skipped_specs = {}
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@all_specs = Hash.new do |specs, name|
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source = source_for(name)
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matches = source.specs.search(name)
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# Don't bother to check for circular deps when no dependency API are
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# available, since it's too slow to be usable. That edge case won't work
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# but resolution other than that should work fine and reasonably fast.
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if source.respond_to?(:dependency_api_available?) && source.dependency_api_available?
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matches = filter_invalid_self_dependencies(matches, name)
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end
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specs[name] = matches.sort_by {|s| [s.version, s.platform.to_s] }
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end
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@all_versions = Hash.new do |candidates, package|
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candidates[package] = all_versions_for(package)
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end
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@sorted_versions = Hash.new do |candidates, package|
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candidates[package] = filtered_versions_for(package).sort
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end
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@sorted_versions[root] = [root_version]
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root_dependencies = prepare_dependencies(@requirements, @packages)
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@cached_dependencies = Hash.new do |dependencies, package|
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dependencies[package] = Hash.new do |versions, version|
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versions[version] = to_dependency_hash(version.dependencies.reject {|d| d.name == package.name }, @packages)
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end
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end
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@cached_dependencies[root] = { root_version => root_dependencies }
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logger = Bundler::UI::Shell.new
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logger.level = debug? ? "debug" : "warn"
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[root, logger]
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end
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def solve_versions(root:, logger:)
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solver = PubGrub::VersionSolver.new(source: self, root: root, strategy: Strategy.new(self), logger: logger)
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result = solver.solve
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resolved_specs = result.flat_map {|package, version| version.to_specs(package, @most_specific_locked_platform) }
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spec_set = SpecSet.new(resolved_specs).specs_with_additional_variants_from(@base.locked_specs)
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@cooldown_skipped = cooldown_skipped_summary(spec_set)
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spec_set
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rescue PubGrub::SolveFailure => e
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incompatibility = e.incompatibility
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names_to_unlock, names_to_allow_prereleases_for, names_to_allow_remote_specs_for, extended_explanation = find_names_to_relax(incompatibility)
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names_to_relax = names_to_unlock + names_to_allow_prereleases_for + names_to_allow_remote_specs_for
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if names_to_relax.any?
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if names_to_unlock.any?
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Bundler.ui.debug "Found conflicts with locked dependencies. Will retry with #{names_to_unlock.join(", ")} unlocked...", true
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@base.unlock_names(names_to_unlock)
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end
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if names_to_allow_prereleases_for.any?
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Bundler.ui.debug "Found conflicts with dependencies with prereleases. Will retry considering prereleases for #{names_to_allow_prereleases_for.join(", ")}...", true
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@base.include_prereleases(names_to_allow_prereleases_for)
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end
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if names_to_allow_remote_specs_for.any?
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Bundler.ui.debug "Found conflicts with local versions of #{names_to_allow_remote_specs_for.join(", ")}. Will retry considering remote versions...", true
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@base.include_remote_specs(names_to_allow_remote_specs_for)
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end
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root, logger = setup_solver
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Bundler.ui.debug "Retrying resolution...", true
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retry
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end
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explanation = e.message
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if extended_explanation
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explanation << "\n\n"
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explanation << extended_explanation
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end
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raise SolveFailure.new(explanation)
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end
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def find_names_to_relax(incompatibility)
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names_to_unlock = []
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names_to_allow_prereleases_for = []
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names_to_allow_remote_specs_for = []
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extended_explanation = nil
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while incompatibility.conflict?
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cause = incompatibility.cause
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incompatibility = cause.incompatibility
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incompatibility.terms.each do |term|
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package = term.package
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name = package.name
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if base_requirements[name]
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names_to_unlock << name
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elsif package.ignores_prereleases? && @all_specs[name].any? {|s| s.version.prerelease? }
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names_to_allow_prereleases_for << name
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elsif package.prefer_local? && @all_specs[name].any? {|s| !s.is_a?(StubSpecification) }
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names_to_allow_remote_specs_for << name
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end
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no_versions_incompat = [cause.incompatibility, cause.satisfier].find {|incompat| incompat.cause.is_a?(PubGrub::Incompatibility::NoVersions) }
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next unless no_versions_incompat
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extended_explanation = no_versions_incompat.extended_explanation
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end
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end
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[names_to_unlock.uniq, names_to_allow_prereleases_for.uniq, names_to_allow_remote_specs_for.uniq, extended_explanation]
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end
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def parse_dependency(package, dependency)
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range = if repository_for(package).is_a?(Source::Gemspec)
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PubGrub::VersionRange.any
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else
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requirement_to_range(dependency)
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end
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PubGrub::VersionConstraint.new(package, range: range)
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end
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def versions_for(package, range = VersionRange.any)
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range.select_versions(@sorted_versions[package])
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end
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def no_versions_incompatibility_for(package, unsatisfied_term)
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cause = PubGrub::Incompatibility::NoVersions.new(unsatisfied_term)
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name = package.name
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constraint = unsatisfied_term.constraint
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constraint_string = constraint.constraint_string
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requirements = constraint_string.split(" OR ").map {|req| Gem::Requirement.new(req.split(",")) }
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if name == "bundler" && bundler_pinned_to_current_version?
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custom_explanation = "the current Bundler version (#{Bundler::VERSION}) does not satisfy #{constraint}"
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extended_explanation = bundler_not_found_message(requirements)
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else
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specs_matching_other_platforms = filter_matching_specs(@all_specs[name], requirements)
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platforms_explanation = specs_matching_other_platforms.any? ? " for any resolution platforms (#{package.platforms.join(", ")})" : ""
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custom_explanation = "#{constraint} could not be found in #{repository_for(package)}#{platforms_explanation}"
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if hint = cooldown_hint(specs_matching_other_platforms)
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custom_explanation += " (#{hint})"
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end
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label = "#{name} (#{constraint_string})"
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extended_explanation = other_specs_matching_message(specs_matching_other_platforms, label) if specs_matching_other_platforms.any?
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end
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Incompatibility.new([unsatisfied_term], cause: cause, custom_explanation: custom_explanation, extended_explanation: extended_explanation)
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end
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def debug?
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ENV["BUNDLER_DEBUG_RESOLVER"] ||
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ENV["BUNDLER_DEBUG_RESOLVER_TREE"] ||
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ENV["DEBUG_RESOLVER"] ||
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ENV["DEBUG_RESOLVER_TREE"] ||
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false
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end
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def incompatibilities_for(package, version)
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package_deps = @cached_dependencies[package]
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sorted_versions = @sorted_versions[package]
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package_deps[version].map do |dep_package, dep_constraint|
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low = high = sorted_versions.index(version)
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# find version low such that all >= low share the same dep
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while low > 0 && package_deps[sorted_versions[low - 1]][dep_package] == dep_constraint
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low -= 1
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end
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low =
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if low == 0
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nil
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else
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sorted_versions[low]
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end
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# find version high such that all < high share the same dep
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while high < sorted_versions.length && package_deps[sorted_versions[high]][dep_package] == dep_constraint
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high += 1
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end
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high =
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if high == sorted_versions.length
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nil
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else
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sorted_versions[high]
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end
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range = PubGrub::VersionRange.new(min: low, max: high, include_min: !low.nil?)
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self_constraint = PubGrub::VersionConstraint.new(package, range: range)
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dep_term = PubGrub::Term.new(dep_constraint, false)
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self_term = PubGrub::Term.new(self_constraint, true)
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custom_explanation = if dep_package.meta? && package.root?
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"current #{dep_package} version is #{dep_constraint.constraint_string}"
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end
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PubGrub::Incompatibility.new([self_term, dep_term], cause: :dependency, custom_explanation: custom_explanation)
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end
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end
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def all_versions_for(package)
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name = package.name
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results = (@base[name] + filter_specs(@all_specs[name], package)).uniq {|spec| [spec.version.hash, spec.platform] }
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if name == "bundler" && !bundler_pinned_to_current_version?
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bundler_spec = Gem.loaded_specs["bundler"]
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results << bundler_spec if bundler_spec
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end
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locked_requirement = base_requirements[name]
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results = filter_matching_specs(results, locked_requirement) if locked_requirement
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results.group_by(&:version).reduce([]) do |groups, (version, specs)|
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platform_specs = package.platform_specs(specs)
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# If package is a top-level dependency,
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# candidate is only valid if there are matching versions for all resolution platforms.
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#
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# If package is not a top-level deependency,
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# then it's not necessary that it has matching versions for all platforms, since it may have been introduced only as
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# a dependency for a platform specific variant, so it will only need to have a valid version for that platform.
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#
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if package.top_level?
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next groups if platform_specs.any?(&:empty?)
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else
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next groups if platform_specs.all?(&:empty?)
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end
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ruby_specs = MatchPlatform.select_best_platform_match(specs, Gem::Platform::RUBY)
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ruby_group = Resolver::SpecGroup.new(ruby_specs)
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unless ruby_group.empty?
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platform_specs.each do |s|
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ruby_group.merge(Resolver::SpecGroup.new(s))
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end
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groups << Resolver::Candidate.new(version, group: ruby_group, priority: -1)
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next groups if package.force_ruby_platform?
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end
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platform_group = Resolver::SpecGroup.new(platform_specs.flatten.uniq)
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next groups if platform_group == ruby_group
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groups << Resolver::Candidate.new(version, group: platform_group, priority: 1)
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groups
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end
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end
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def source_for(name)
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@source_requirements[name] || @source_requirements[:default]
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end
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def default_bundler_source
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@source_requirements[:default_bundler]
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end
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def bundler_pinned_to_current_version?
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!default_bundler_source.nil?
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end
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def name_for_explicit_dependency_source
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Bundler.default_gemfile.basename.to_s
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rescue StandardError
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"Gemfile"
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end
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def raise_incomplete!(incomplete_specs)
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raise_not_found!(@base.get_package(incomplete_specs.first.name))
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end
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def sort_versions_by_preferred(package, versions)
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@gem_version_promoter.sort_versions(package, versions)
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end
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private
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def raise_not_found!(package)
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name = package.name
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source = source_for(name)
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specs = @all_specs[name]
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matching_part = name
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requirement_label = SharedHelpers.pretty_dependency(package.dependency)
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cache_message = begin
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" or in gems cached in #{Bundler.settings.app_cache_path}" if Bundler.app_cache.exist?
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rescue GemfileNotFound
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nil
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end
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specs_matching_requirement = filter_matching_specs(specs, package.dependency.requirement)
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not_found_message = if specs_matching_requirement.any?
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specs = specs_matching_requirement
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matching_part = requirement_label
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platforms = package.platforms
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if platforms.size == 1
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"Could not find gem '#{requirement_label}' with platform '#{platforms.first}'"
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else
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"Could not find gems matching '#{requirement_label}' valid for all resolution platforms (#{platforms.join(", ")})"
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end
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else
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"Could not find gem '#{requirement_label}'"
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end
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message = String.new("#{not_found_message} in #{source}#{cache_message}.\n")
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if specs.any?
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message << "\n#{other_specs_matching_message(specs, matching_part)}"
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end
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if hint = cooldown_hint(specs_matching_requirement)
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message << "\n\n#{hint}."
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end
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if specs_matching_requirement.any? && (hint = platform_mismatch_hint)
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message << "\n\n#{hint}"
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end
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raise GemNotFound, message
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end
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def platform_mismatch_hint
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locked_platforms = Bundler.locked_gems&.platforms
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return unless locked_platforms
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local_platform = Bundler.local_platform
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return if locked_platforms.include?(local_platform)
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return if locked_platforms.any? {|p| p == Gem::Platform::RUBY }
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"Your current platform (#{local_platform}) is not included in the lockfile's platforms (#{locked_platforms.join(", ")}). " \
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"Add the current platform to the lockfile with\n`bundle lock --add-platform #{local_platform}` and try again."
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rescue GemfileNotFound
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nil
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end
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def filtered_versions_for(package)
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@gem_version_promoter.filter_versions(package, @all_versions[package])
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end
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def raise_all_versions_filtered_out!(package)
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level = @gem_version_promoter.level
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name = package.name
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locked_version = package.locked_version
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requirement = package.dependency
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raise GemNotFound,
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"#{name} is locked to #{locked_version}, while Gemfile is requesting #{requirement}. " \
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"--strict --#{level} was specified, but there are no #{level} level upgrades from #{locked_version} satisfying #{requirement}, so version solving has failed"
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end
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||||
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def filter_matching_specs(specs, requirements)
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Array(requirements).flat_map do |requirement|
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specs.select {| spec| requirement_satisfied_by?(requirement, spec) }
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||||
end
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||||
end
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||||
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||||
def filter_specs(specs, package)
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filter_remote_specs(filter_cooldown(filter_prereleases(specs, package)), package)
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end
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||||
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||||
def filter_prereleases(specs, package)
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return specs unless package.ignores_prereleases? && specs.size > 1
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||||
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specs.reject {|s| s.version.prerelease? }
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||||
end
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||||
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def filter_cooldown(specs)
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return specs if specs.empty?
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||||
excluded_versions = cooldown_excluded_versions(specs)
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||||
return specs if excluded_versions.empty?
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||||
specs.reject {|s| excluded_versions.include?([s.name, s.version]) }
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||||
end
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||||
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||||
def cooldown_excluded_versions(specs)
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||||
excluded = {}
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||||
specs.each do |spec|
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next unless cooldown_excluded?(spec)
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||||
excluded[[spec.name, spec.version]] = true
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(@cooldown_skipped_specs ||= {})[[spec.name, spec.version]] ||= spec
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end
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excluded
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||||
end
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||||
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||||
def cooldown_hint(specs)
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excluded_versions = cooldown_excluded_versions(specs)
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return nil if excluded_versions.empty?
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||||
"#{excluded_versions.size} version#{"s" if excluded_versions.size > 1} excluded by the cooldown setting; pass `--cooldown 0` to bypass"
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||||
end
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||||
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||||
def cooldown_excluded?(spec)
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||||
return false unless spec.respond_to?(:created_at) && spec.created_at
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||||
return false unless spec.respond_to?(:remote) && spec.remote
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||||
return false if locked_by_lockfile?(spec)
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||||
days = spec.remote.effective_cooldown
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||||
return false if days.nil? || days <= 0
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||||
(cooldown_now - spec.created_at) < (days * 86_400)
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||||
end
|
||||
|
||||
# A version already written to the lockfile has been adopted, and cooldown
|
||||
# only governs the adoption of *new* versions, so it must never retract one
|
||||
# the lockfile already pins. Keying this off the locked specs rather than the
|
||||
# prevent-downgrade floor matters because that floor is absent on resolutions
|
||||
# that re-pick a gem from scratch: the auxiliary full update run to compute
|
||||
# `--update` targets, and the from-scratch retries after a conflict unlocks a
|
||||
# gem. In those passes the locked version is the only candidate, so filtering
|
||||
# it out makes an unrelated operation impossible whenever every published
|
||||
# version matching the requirement sits inside the cooldown window.
|
||||
#
|
||||
# Gems named on a `bundle update GEM` command are the exception: the user
|
||||
# asked to move them, so they stay subject to cooldown and a locked-but-fresh
|
||||
# release is pushed back to an older one (or fails loudly when none exists).
|
||||
def locked_by_lockfile?(spec)
|
||||
return false unless defined?(@base) && @base
|
||||
return false if @base.explicitly_unlocked?(spec.name)
|
||||
@base.locked_specs[spec.name].any? {|locked| locked.version == spec.version }
|
||||
end
|
||||
|
||||
def cooldown_now
|
||||
@cooldown_now ||= Time.now
|
||||
end
|
||||
|
||||
# Reports, per gem, the newest version that cooldown kept out of a
|
||||
# successful resolution. A skipped version is only worth reporting when it
|
||||
# is newer than the resolved version and satisfies every requirement the
|
||||
# final resolution places on that gem, so we don't claim a version the
|
||||
# resolver could never have picked anyway.
|
||||
def cooldown_skipped_summary(spec_set)
|
||||
return [] if @cooldown_skipped_specs.empty?
|
||||
|
||||
requirements = Hash.new {|h, name| h[name] = [] }
|
||||
@requirements.each {|dep| requirements[dep.name] << dep.requirement }
|
||||
spec_set.each do |spec|
|
||||
spec.dependencies.each {|dep| requirements[dep.name] << dep.requirement }
|
||||
end
|
||||
|
||||
resolved_versions = {}
|
||||
spec_set.each do |spec|
|
||||
version = resolved_versions[spec.name]
|
||||
resolved_versions[spec.name] = spec.version if version.nil? || spec.version > version
|
||||
end
|
||||
|
||||
newest_skipped = {}
|
||||
@cooldown_skipped_specs.each do |(name, version), spec|
|
||||
resolved = resolved_versions[name]
|
||||
next unless resolved && version > resolved
|
||||
next unless requirements[name].all? {|req| req.satisfied_by?(version) }
|
||||
newest = newest_skipped[name]
|
||||
newest_skipped[name] = spec if newest.nil? || version > newest.version
|
||||
end
|
||||
|
||||
newest_skipped.values.sort_by(&:name).map do |spec|
|
||||
{
|
||||
name: spec.name,
|
||||
version: spec.version,
|
||||
resolved: resolved_versions[spec.name],
|
||||
available_in_days: remaining_cooldown_days(spec),
|
||||
}
|
||||
end
|
||||
end
|
||||
|
||||
def remaining_cooldown_days(spec)
|
||||
remaining = (spec.remote.effective_cooldown * 86_400) - (cooldown_now - spec.created_at)
|
||||
[(remaining / 86_400.0).ceil, 1].max
|
||||
end
|
||||
|
||||
def filter_remote_specs(specs, package)
|
||||
if package.prefer_local?
|
||||
local_specs = specs.select {|s| s.is_a?(StubSpecification) }
|
||||
|
||||
if local_specs.empty?
|
||||
package.consider_remote_versions!
|
||||
specs
|
||||
else
|
||||
local_specs
|
||||
end
|
||||
else
|
||||
specs
|
||||
end
|
||||
end
|
||||
|
||||
# Ignore versions that depend on themselves incorrectly
|
||||
def filter_invalid_self_dependencies(specs, name)
|
||||
specs.reject do |s|
|
||||
s.dependencies.any? {|d| d.name == name && !d.requirement.satisfied_by?(s.version) }
|
||||
end
|
||||
end
|
||||
|
||||
def requirement_satisfied_by?(requirement, spec)
|
||||
requirement.satisfied_by?(spec.version) || spec.source.is_a?(Source::Gemspec)
|
||||
end
|
||||
|
||||
def repository_for(package)
|
||||
source_for(package.name)
|
||||
end
|
||||
|
||||
def base_requirements
|
||||
@base.base_requirements
|
||||
end
|
||||
|
||||
def prepare_dependencies(requirements, packages)
|
||||
to_dependency_hash(requirements, packages).filter_map do |dep_package, dep_constraint|
|
||||
name = dep_package.name
|
||||
|
||||
next [dep_package, dep_constraint] if name == "bundler"
|
||||
|
||||
dep_range = dep_constraint.range
|
||||
versions = versions_for(dep_package, dep_range)
|
||||
if versions.empty?
|
||||
if dep_package.ignores_prereleases? || dep_package.prefer_local?
|
||||
@all_versions.delete(dep_package)
|
||||
@sorted_versions.delete(dep_package)
|
||||
end
|
||||
dep_package.consider_prereleases! if dep_package.ignores_prereleases?
|
||||
dep_package.consider_remote_versions! if dep_package.prefer_local?
|
||||
versions = versions_for(dep_package, dep_range)
|
||||
end
|
||||
|
||||
if versions.empty? && select_all_versions(dep_package, dep_range).any?
|
||||
raise_all_versions_filtered_out!(dep_package)
|
||||
end
|
||||
|
||||
next [dep_package, dep_constraint] unless versions.empty?
|
||||
|
||||
next unless dep_package.current_platform?
|
||||
|
||||
raise_not_found!(dep_package)
|
||||
end.to_h
|
||||
end
|
||||
|
||||
def select_all_versions(package, range)
|
||||
range.select_versions(@all_versions[package])
|
||||
end
|
||||
|
||||
def other_specs_matching_message(specs, requirement)
|
||||
message = String.new("The source contains the following gems matching '#{requirement}':\n")
|
||||
message << specs.map {|s| " * #{s.full_name}" }.join("\n")
|
||||
message
|
||||
end
|
||||
|
||||
def requirement_to_range(requirement)
|
||||
ranges = requirement.requirements.map do |(op, version)|
|
||||
ver = Resolver::Candidate.new(version, priority: -1)
|
||||
platform_ver = Resolver::Candidate.new(version, priority: 1)
|
||||
|
||||
case op
|
||||
when "~>"
|
||||
name = "~> #{ver}"
|
||||
bump = Resolver::Candidate.new(version.bump.to_s + ".A")
|
||||
PubGrub::VersionRange.new(name: name, min: ver, max: bump, include_min: true)
|
||||
when ">"
|
||||
PubGrub::VersionRange.new(min: platform_ver)
|
||||
when ">="
|
||||
PubGrub::VersionRange.new(min: ver, include_min: true)
|
||||
when "<"
|
||||
PubGrub::VersionRange.new(max: ver)
|
||||
when "<="
|
||||
PubGrub::VersionRange.new(max: platform_ver, include_max: true)
|
||||
when "="
|
||||
PubGrub::VersionRange.new(min: ver, max: platform_ver, include_min: true, include_max: true)
|
||||
when "!="
|
||||
PubGrub::VersionRange.new(min: ver, max: platform_ver, include_min: true, include_max: true).invert
|
||||
else
|
||||
raise "bad version specifier: #{op}"
|
||||
end
|
||||
end
|
||||
|
||||
ranges.inject(&:intersect)
|
||||
end
|
||||
|
||||
def to_dependency_hash(dependencies, packages)
|
||||
dependencies.inject({}) do |deps, dep|
|
||||
package = packages[dep.name]
|
||||
|
||||
current_req = deps[package]
|
||||
new_req = parse_dependency(package, dep.requirement)
|
||||
|
||||
deps[package] = if current_req
|
||||
current_req.intersect(new_req)
|
||||
else
|
||||
new_req
|
||||
end
|
||||
|
||||
deps
|
||||
end
|
||||
end
|
||||
|
||||
def bundler_not_found_message(conflict_dependencies)
|
||||
candidate_specs = filter_matching_specs(default_bundler_source.specs.search("bundler"), conflict_dependencies)
|
||||
|
||||
if candidate_specs.any?
|
||||
target_version = candidate_specs.last.version
|
||||
new_command = [File.basename($PROGRAM_NAME), "_#{target_version}_", *ARGV].join(" ")
|
||||
"Your bundle requires a different version of Bundler than the one you're running.\n" \
|
||||
"Install the necessary version with `gem install bundler:#{target_version}` and rerun bundler using `#{new_command}`\n"
|
||||
else
|
||||
"Your bundle requires a different version of Bundler than the one you're running, and that version could not be found.\n"
|
||||
end
|
||||
end
|
||||
end
|
||||
end
|
||||
Reference in New Issue
Block a user