Module: Spoom::BundlerHelper

Extended by:
T::Sig
Defined in:
lib/spoom/bundler_helper.rb

Class Method Summary collapse

Class Method Details

.gem_requirement_from_real_bundle(gem_name) ⇒ Object

Generate a gem requirement for the given gem name, using that gem’s version in the “real” current bundle.

This ensures that any child Spoom::Contexts use predictable gem versions, without having to manually specify them and bump them to stay in sync with Spoom’s real Gemfile.

Given ‘“foo”`, returns a string like ’gem “foo”, “= 1.2.3”‘, suitable for inserting into a Gemfile. : (String) -> String



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# File 'lib/spoom/bundler_helper.rb', line 16

def gem_requirement_from_real_bundle(gem_name)
  specs = Bundler.load.gems[gem_name]

  if specs.nil? || specs.empty?
    raise "Did not find gem #{gem_name.inspect} in the current bundle"
  elsif specs.count > 1
    raise <<~MSG
      Found multiple versions of #{gem_name.inspect} in the current bundle:
      #{specs.sort_by(&:version).map { |spec| "  - #{spec.name} #{spec.version}" }.join("\n")}
    MSG
  else
    spec = specs.first
    %(gem "#{spec.name}", "= #{spec.version}")
  end
end