Function getChanges

packs/step-parser/src/differ.ts:16–43

(oldCode: string, newCode: string)

  };

function getChanges(oldCode: string, newCode: string) {
  const changes = diffLines(normalize(oldCode), normalize(newCode));
  let index = 0;
  const chunks: { op: "-" | "+"; count: number; index: number }[] = [];
  changes.forEach(({ count = 0, removed, added }) => {
    if (removed) {
      chunks.push({
        op: "-",
        count,
        index
      });
    }

    if (added) {
      chunks.push({
        op: "+",
        count,
        index
      });
    }

    if (!removed) {
      index += count;
    }
  });

  return chunks;
}

function normalize(text: string) {
  return text && text.trimEnd().concat("\n");