code: function (workingDirectory) {
          var gitPath = getClosestGitPath(workingDirectory);
  
          if (!gitPath) {
              throw new Error('git-hooks must be run inside a git repository');
          }
  
          var hooksPath = path.resolve(gitPath, HOOKS_DIRNAME);
          var pathToGitHooks = path.join(path.relative(hooksPath, __dirname), 'git-hooks');
   
          if (isWin32) {
              pathToGitHooks = pathToGitHooks.replace(/\\/g, '\\\\');
          }
  
          if (fsHelpers.exists(hooksOldPath)) {
              throw new Error('git-hooks already installed');
          }
  
          if (fsHelpers.exists(hooksPath)) {
              fs.renameSync(hooksPath, hooksOldPath);
          }
  
          var hookTemplate = fs.readFileSync(__dirname + '/' + HOOKS_TEMPLATE_FILE_NAME);
          var pathToGitHooks = path.relative(hooksPath, __dirname);
          // Fix non-POSIX (Windows) separators
          pathToGitHooks = pathToGitHooks.replace(new RegExp(path.sep.replace(/\\/g, '\\$&'), 'g'), '/');
          var hook = util.format(hookTemplate.toString(), pathToGitHooks);
  
          fsHelpers.makeDir(hooksPath);
          HOOKS.forEach(function (hookName) {
              var hookPath = path.resolve(hooksPath, hookName);
              try {
                  fs.writeFileSync(hookPath, hook, {mode: '0777'});
              } catch (e) {
                  // node 0.8 fallback
                  fs.writeFileSync(hookPath, hook, 'utf8');
                  fs.chmodSync(hookPath, '0777');
              }
          });
      }
docs: Installs git hooks.
  
  @param {String} [workingDirectory]
  @throws {Error}