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# With thanks to @myronmarston
# https://github.com/vcr/vcr/blob/master/spec/capture_warnings.rb
module CaptureWarnings
def report_warnings(&block)
current_dir = Dir.pwd
warnings, errors = capture_error(&block).partition { |line| line.include?('warning') }
project_warnings, other_warnings = warnings.uniq.partition { |line| line.include?(current_dir) }
if errors.any?
puts errors.join("\n")
end
if other_warnings.any?
puts "#{ other_warnings.count } non-gherkin warnings detected, set VIEW_OTHER_WARNINGS=true to see them."
print_warnings('other', other_warnings) if ENV['VIEW_OTHER_WARNINGS']
end
if project_warnings.any?
puts "#{ project_warnings.count } gherkin warnings detected"
print_warnings('gherkin', project_warnings)
fail "Please remove all gherkin warnings."
end
ensure_system_exit_if_required
end
def capture_error(&block)
old_stderr = STDERR.clone
pipe_r, pipe_w = IO.pipe
pipe_r.sync = true
error = ""
reader = Thread.new do
begin
loop do
error << pipe_r.readpartial(1024)
end
rescue EOFError
end
end
STDERR.reopen(pipe_w)
block.call
ensure
capture_system_exit
STDERR.reopen(old_stderr)
pipe_w.close
reader.join
return error.split("\n")
end
def print_warnings(type, warnings)
puts
puts "-" * 30 + " #{type} warnings: " + "-" * 30
puts
puts warnings.join("\n")
puts
puts "-" * 75
puts
end
def ensure_system_exit_if_required
raise @system_exit if @system_exit
end
def capture_system_exit
@system_exit = $!
end
end
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