Function buildGateVersionCondition

scripts/babel/transform-react-version-pragma.js:22–50

(comments)

  // See info about semver ranges here:
  // https://www.npmjs.com/package/semver
  function buildGateVersionCondition(comments) {
    if (!comments) {
      return null;
    }

    const resultingCondition = comments.reduce(
      (accumulatedCondition, commentLine) => {
        const commentStr = commentLine.value.trim();

        if (!commentStr.startsWith(GATE_VERSION_STR)) {
          return accumulatedCondition;
        }

        const condition = commentStr.slice(GATE_VERSION_STR.length);
        if (accumulatedCondition === null) {
          return condition;
        }

        return accumulatedCondition.concat(' ', condition);
      },
      null
    );

    if (resultingCondition === null) {
      return null;
    }

    return t.stringLiteral(resultingCondition);
  }

  return {
    name: 'transform-react-version-pragma',