Module: DbAgile::Robustness::Dependencies

Included in:
DbAgile::Robustness
Defined in:
lib/dbagile/robustness/dependencies.rb

Instance Method Summary collapse

Instance Method Details

#has_gem!(gem_name, gem_version = nil, msg = nil) ⇒ Object

Asserts that a gem exists and is loaded



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# File 'lib/dbagile/robustness/dependencies.rb', line 20

def has_gem!(gem_name, gem_version = nil, msg = nil)
  require 'rubygems'
  gem gem_name, gem_version
  require gem_name
rescue StandardError => ex
  if msg.nil?
    msg = gem_version.nil? ? gem_name : "#{gem_name} (#{gem_version})"
    msg = "DbAgile requires #{msg} but failed to load it" 
  end
  msg = "#{msg}\n#{ex.message}"
  raise DbAgile::DependencyError, msg, ex.backtrace
end

#has_stdlib!(util_name, msg = nil) ⇒ Object

Asserts that a standard library



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# File 'lib/dbagile/robustness/dependencies.rb', line 9

def has_stdlib!(util_name, msg = nil)
  require util_name
rescue StandardError => ex
  if msg.nil?
    msg = "DbAgile requires #{util_name} but failed to load it" 
  end
  msg = "#{msg}\n#{ex.message}"
  raise DbAgile::DependencyError, msg, ex.backtrace
end