61 lines
1.4 KiB
Ruby
61 lines
1.4 KiB
Ruby
module Bundler
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# General purpose class for retrying code that may fail
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class Retry
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DEFAULT_ATTEMPTS = 2
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attr_accessor :name, :total_runs, :current_run
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class << self
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attr_accessor :attempts
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end
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def initialize(name, exceptions = nil, attempts = nil)
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@name = name
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attempts ||= default_attempts
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@exceptions = Array(exceptions) || []
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@total_runs = attempts.next # will run once, then upto attempts.times
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end
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def default_attempts
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return Integer(self.class.attempts) if self.class.attempts
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DEFAULT_ATTEMPTS
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end
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def attempt(&block)
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@current_run = 0
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@failed = false
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@error = nil
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while keep_trying? do
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run(&block)
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end
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@result
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end
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alias :attempts :attempt
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private
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def run(&block)
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@failed = false
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@current_run += 1
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@result = block.call
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rescue => e
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fail(e)
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end
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def fail(e)
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@failed = true
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raise e if last_attempt? || @exceptions.any?{ |k| e.is_a?(k) }
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return true unless name
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Bundler.ui.warn "Retrying#{" #{name}" if name} due to error (#{current_run.next}/#{total_runs}): #{e.class} #{e.message}"
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end
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def keep_trying?
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return true if current_run.zero?
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return false if last_attempt?
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return true if @failed
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end
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def last_attempt?
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current_run >= total_runs
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end
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end
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end
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