Stuck.

require 'sqlite3'

$main_path = '/some/path'
$db_file = $main_path + "/file.db"

class A
  @@db = SQLite3::Database.open('file.db')

  def self.some_other_method
    @@db.execute("whatever")
  end

  def some_method
    @@db.execute("whatever")
  end
end

class B
  def initialize
    init_db
  end

  def init_db
    Dir.mkdir($main_path) unless Dir.exists?($main_path)
    if File.exists?($db_file)
      db = SQLite3::Database.open($db_file)
    else
      db = SQLite3::Database.new($db_file)
      sql = <<SQL
create table whatever (
  something varchar(30)
);
SQL
    db.execute(sql)
  end
end

B.new


# in `initialize': unable to open database file (SQLite3::CantOpenException)
# The line it's pointing to is 7 here.
# So, the interpreter is running through the code and executing the class A class variable code first before getting to B.new which would initialize the DB. What is a good way to get around this?