Exception: Molinillo::VersionConflict

Inherits:
ResolverError show all
Includes:
Delegates::SpecificationProvider
Defined in:
lib/molinillo/errors.rb

Overview

An error caused by conflicts in version

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Delegates::SpecificationProvider

#allow_missing?, #dependencies_equal?, #dependencies_for, #name_for, #name_for_explicit_dependency_source, #name_for_locking_dependency_source, #requirement_satisfied_by?, #search_for, #sort_dependencies

Constructor Details

#initialize(conflicts, specification_provider) ⇒ VersionConflict

Initializes a new error with the given version conflicts.

Parameters:



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# File 'lib/molinillo/errors.rb', line 66

def initialize(conflicts, specification_provider)
  pairs = []
  conflicts.values.flat_map(&:requirements).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
  @specification_provider = specification_provider
end

Instance Attribute Details

#conflicts ⇒ {String => Resolution::Conflict} (readonly)

Returns the conflicts that caused resolution to fail.

Returns:

  • ({String => Resolution::Conflict}) —

    the conflicts that caused resolution to fail



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# File 'lib/molinillo/errors.rb', line 57

def conflicts
  @conflicts
end

#specification_provider ⇒ SpecificationProvider (readonly)

Returns the specification provider used during resolution.

Returns:



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# File 'lib/molinillo/errors.rb', line 61

def specification_provider
  @specification_provider
end

Instance Method Details

#message_with_trees(opts = {}) ⇒ String

Returns An error message that includes requirement trees, which is much more detailed & customizable than the default message.

Parameters:

  • opts (Hash) (defaults to: {}) —

    the options to create a message with.

Options Hash (opts):

  • :solver_name (String) —

    The user-facing name of the solver

  • :possibility_type (String) —

    The generic name of a possibility

  • :reduce_trees (Proc) —

    A proc that reduced the list of requirement trees

  • :printable_requirement (Proc) —

    A proc that pretty-prints requirements

  • :additional_message_for_conflict (Proc) —

    A proc that appends additional messages for each conflict

  • :version_for_spec (Proc) —

    A proc that returns the version number for a possibility

Returns:

  • (String) —

    An error message that includes requirement trees, which is much more detailed & customizable than the default message



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# File 'lib/molinillo/errors.rb', line 97

def message_with_trees(opts = {})
  solver_name = opts.delete(:solver_name) { self.class.name.split('::').first }
  possibility_type = opts.delete(:possibility_type) { 'possibility named' }
  reduce_trees = opts.delete(:reduce_trees) { proc { |trees| trees.uniq.sort_by(&:to_s) } }
  printable_requirement = opts.delete(:printable_requirement) { proc { |req| req.to_s } }
  additional_message_for_conflict = opts.delete(:additional_message_for_conflict) { proc {} }
  version_for_spec = opts.delete(:version_for_spec) { proc(&:to_s) }
  incompatible_version_message_for_conflict = opts.delete(:incompatible_version_message_for_conflict) do
    proc do |name, _conflict|
      %(#{solver_name} could not find compatible versions for #{possibility_type} "#{name}":)
    end
  end

  conflicts.sort.reduce(''.dup) do |o, (name, conflict)|
    o << "\n" << incompatible_version_message_for_conflict.call(name, conflict) << "\n"
    if conflict.locked_requirement
      o << %(  In snapshot (#{name_for_locking_dependency_source}):\n)
      o << %(    #{printable_requirement.call(conflict.locked_requirement)}\n)
      o << %(\n)
    end
    o << %(  In #{name_for_explicit_dependency_source}:\n)
    trees = reduce_trees.call(conflict.requirement_trees)

    o << trees.map do |tree|
      t = ''.dup
      depth = 2
      tree.each do |req|
        t << '  ' * depth << printable_requirement.call(req)
        unless tree.last == req
          if spec = conflict.activated_by_name[name_for(req)]
            t << %( was resolved to #{version_for_spec.call(spec)}, which)
          end
          t << %( depends on)
        end
        t << %(\n)
        depth += 1
      end
      t
    end.join("\n")

    additional_message_for_conflict.call(o, name, conflict)

    o
  end.strip
end