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# Some helper methods for throwing errors.
module Puppet::Util::Errors
# Throw a dev error.
def devfail(msg)
self.fail(Puppet::DevError, msg)
end
# Add line and file info if available and appropriate.
def adderrorcontext(error, other = nil)
error.line ||= self.line if self.respond_to?(:line) and self.line
error.file ||= self.file if self.respond_to?(:file) and self.file
error.set_backtrace other.backtrace if other and other.respond_to?(:backtrace)
error
end
def error_context
if file and line
" at #{file}:#{line}"
elsif line
" at line #{line}"
elsif file
" in #{file}"
else
""
end
end
# Wrap a call in such a way that we always throw the right exception and keep
# as much context as possible.
def exceptwrap(options = {})
options[:type] ||= Puppet::DevError
begin
return yield
rescue Puppet::Error => detail
raise adderrorcontext(detail)
rescue => detail
message = options[:message] || "#{self.class} failed with error #{detail.class}: #{detail}"
error = options[:type].new(message)
# We can't use self.fail here because it always expects strings,
# not exceptions.
raise adderrorcontext(error, detail)
end
retval
end
# Throw an error, defaulting to a Puppet::Error.
def fail(*args)
if args[0].is_a?(Class)
type = args.shift
else
type = Puppet::Error
end
error = adderrorcontext(type.new(args.join(" ")))
raise error
end
end
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