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# frozen_string_literal: true
# Borrowed and heavily adjusted from:
# https://github.com/metricfu/metric_fu/blob/master/spec/capture_warnings.rb
require "fileutils"
class FailOnWarnings
def initialize
@stderr_stream = StringIO.new
@app_root = Dir.pwd
end
def collect_warnings
$stderr = @stderr_stream
$VERBOSE = true
end
def process_warnings
lines = close_stream
app_warnings, other_warnings = split_lines(lines)
print_own_warnings(app_warnings) if app_warnings.any?
write_other_warnings_to_tmp(other_warnings) if other_warnings.any?
fail_script(app_warnings) if app_warnings.any?
end
private
def close_stream
$stderr = STDERR
@stderr_stream.rewind
lines = @stderr_stream.read.split("\n")
lines.uniq!
@stderr_stream.close
lines
end
def split_lines(lines)
lines.partition { |line| line.include?(@app_root) }
end
def print_own_warnings(app_warnings)
puts ""
puts ""
puts <<-WARNINGS
#{'-' * 30} app warnings: #{'-' * 30}
#{app_warnings.join("\n")}
#{'-' * 75}
WARNINGS
end
def write_other_warnings_to_tmp(other_warnings)
output_dir = File.join(@app_root, "tmp")
FileUtils.mkdir_p(output_dir)
output_file = File.join(output_dir, "warnings.txt")
File.open(output_file, "w") do |file|
file.write(other_warnings.join("\n") << "\n")
end
puts
puts "Non-app warnings written to tmp/warnings.txt"
puts
end
def fail_script(app_warnings)
abort "Failing build due to app warnings: #{app_warnings.inspect}"
end
end
warning_collector = FailOnWarnings.new
warning_collector.collect_warnings
RSpec.configure do |config|
config.after(:suite) do
warning_collector.process_warnings
end
end
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