Function dedent

packages/core/schematics/utils/tsurge/testing/dedent.ts:14–31

(strings: TemplateStringsArray, ...values: any[])

 * Additionally, whitespace in empty lines is removed.
 */
export function dedent(strings: TemplateStringsArray, ...values: any[]) {
  let joinedString = '';
  for (let i = 0; i < values.length; i++) {
    joinedString += `${strings[i]}${values[i]}`;
  }
  joinedString += strings[strings.length - 1];

  const matches = joinedString.match(/^[ \t]*(?=\S)/gm);
  if (matches === null) {
    return joinedString;
  }

  const minLineIndent = Math.min(...matches.map((el) => el.length));
  const omitMinIndentRegex = new RegExp(`^[ \\t]{${minLineIndent}}`, 'gm');
  const omitEmptyLineWhitespaceRegex = /^[ \t]+$/gm;
  const result = minLineIndent > 0 ? joinedString.replace(omitMinIndentRegex, '') : joinedString;
  return result.replace(omitEmptyLineWhitespaceRegex, '');
}