require 'open-uri' require 'net/http' module Danger class DangerRcov < Plugin def report(current_url:, master_url:, show_warning: true) # Get code coverage report as json from url current_report = get_report(url: current_url) master_report = get_report(url: master_url) @current_report = current_report @master_report = master_report if show_warning && master_report && master_report.dig('metrics', 'covered_percent').round(2) > current_report.dig('metrics', 'covered_percent').round(2) warn("Code coverage decreased from #{master_report.dig('metrics', 'covered_percent').round(2).to_s}% to #{current_report.dig('metrics', 'covered_percent').round(2)}%") end # Output the processed report output_report(current_report, master_report) end private def get_report(url:) artifacts = JSON.parse(URI.parse(url).read).map { |a| a['url'] } coverage_url = artifacts.find { |artifact| artifact.end_with?('coverage/coverage.json') } return nil if !coverage_url coverage_url_with_token = "#{coverage_url}?circle-token=#{ENV['CIRCLE_TOKEN']}" JSON.parse(URI.parse(coverage_url_with_token).read) end def output_report(results, master_results) @current_covered_percent = results.dig('metrics', 'covered_percent').round(2) @current_files_count = results.dig('files')&.count @current_total_lines = results.dig('metrics', 'total_lines') @current_misses_count = @current_total_lines - results.dig('metrics', 'covered_lines') if master_results @master_covered_percent = master_results.dig('metrics', 'covered_percent').round(2) @master_files_count = master_results.dig('files')&.count @master_total_lines = master_results.dig('metrics', 'total_lines') @master_misses_count = @master_total_lines - master_results.dig('metrics', 'covered_lines') end message = "```diff\n@@ Coverage Diff @@\n" message << "## #{justify_text('master', 16)} #{justify_text('#' + ENV['CIRCLE_PULL_REQUEST'].split('/').last, 8)} #{justify_text('+/-', 7)} #{justify_text('##', 3)}\n" message << separator_line message << new_line('Coverage', @current_covered_percent, @master_covered_percent, '%') message << separator_line message << new_line('Files', @current_files_count, @master_files_count) message << new_line('Lines', @current_total_lines, @master_total_lines) message << separator_line message << new_line('Misses', @current_misses_count, @master_misses_count) message << "```" end def separator_line "========================================\n" end def new_line(title, current, master, symbol=nil) formatter = symbol ? '%+.2f' : '%+d' currrent_formatted = current.to_s + symbol.to_s master_formatted = master ? master.to_s + symbol.to_s : '-' prep = (master_formatted != '-' && current - master != 0) ? '+ ' : ' ' line = data_string(title, master_formatted, currrent_formatted, prep) line << justify_text(sprintf(formatter, current - master) + symbol.to_s, 8) if prep == '+ ' line << "\n" line end def justify_text(string, adjust, position='right') string.send(position == 'right' ? :rjust : :ljust, adjust) end def data_string(title, master, current, prep) "#{prep}#{justify_text(title, 9, 'left')} #{justify_text(master, 7)}#{justify_text(current, 9)}" end end end