module Gcovinator

# File lib/gcovinator.rb, line 15
def run(build_dir, source_dirs, files, output_dir, prefix)
  build_dir = Pathname.new(File.expand_path(build_dir)).cleanpath.to_s
  source_dirs = ["."] if source_dirs.empty?
  source_dirs = source_dirs.map do |s|
    Pathname.new(File.expand_path(s)).cleanpath.to_s
  end
  files = Dir["#{build_dir}/**/*.gcda"] if files.empty?
  files = files.map do |f|
    Pathname.new(File.expand_path(f)).cleanpath.to_s
  end
  output_dir = Pathname.new(File.expand_path(output_dir)).cleanpath.to_s
  prefix = Pathname.new(File.expand_path(prefix)).cleanpath.to_s
  file_coverages = {}
  Dir.mktmpdir do |dir|
    Dir.chdir(dir) do
      files.each do |f|
        stdout, stderr, status = Open3.capture3("gcov", "-bc", f)
        gcov_files = Dir["*.gcov"]
        gcov_files.each do |gcov_file|
          GcovParser.parse(gcov_file, file_coverages, build_dir, source_dirs)
          File.unlink(gcov_file)
        end
      end
    end
  end
  FileUtils.mkdir_p(output_dir)
  file_reports = file_coverages.each_with_index.map do |(source_file_name, file_coverage), i|
    FileReport.new(source_file_name, file_coverage, prefix, output_dir, sprintf("s%04d.html", i))
  end
  IndexReport.new(output_dir, file_reports)
end