Prevent specific gem from locking

bundle_patch.rb

require 'bundler/lockfile_generator'

module GitPatch
  def initialize(options)
    @skip_locking = options['skip_locking'] === true
    super
  end

  def skip_locking?
    @skip_locking
  end
end

module DependencyPatch
  def initialize(name, version, options = {}, &blk)
    @skip_locking = options["skip_locking"] === true
    super
  end

  def skip_locking?
    @skip_locking
  end
end

module LockfileGeneratorPatch
  def add_dependencies
    out << "\nDEPENDENCIES\n"

    handled = []
    definition.dependencies.sort_by(&:to_s).each do |dep|
      next if handled.include?(dep.name)
      next if dep.skip_locking?
      out << dep.to_lock
      handled << dep.name
    end
  end
end

module SourceListPatch
  def lock_sources
    super.reject do |source|
      source.respond_to?(:skip_locking?) && source.skip_locking?
    end
  end
end

Bundler::Dsl.class_eval do
  Bundler::Source::Git.prepend GitPatch
  Bundler::Dependency.prepend DependencyPatch
  Bundler::LockfileGenerator.prepend LockfileGeneratorPatch
  Bundler::SourceList.prepend SourceListPatch

  valid_keys = VALID_KEYS
  remove_const 'VALID_KEYS'
  const_set 'VALID_KEYS', (valid_keys + ['skip_locking'])
end

Usage example gem 'my_extension', git: 'url_to_repo', skip_locking: true