Function getAbsoluteMappingEntries

src/mapping-entry.ts:22–50

(
  absoluteBaseUrl: string,
  paths: Paths,
  addMatchAll: boolean
)

 * @param addMatchAll
 */
export function getAbsoluteMappingEntries(
  absoluteBaseUrl: string,
  paths: Paths,
  addMatchAll: boolean
): ReadonlyArray<MappingEntry> {
  // Resolve all paths to absolute form once here, and sort them by
  // longest prefix once here, this saves time on each request later.
  // We need to put them in an array to preserve the sorting order.
  const sortedKeys = sortByLongestPrefix(Object.keys(paths));
  const absolutePaths: Array<MappingEntry> = [];
  for (const key of sortedKeys) {
    absolutePaths.push({
      pattern: key,
      paths: paths[key].map((pathToResolve) =>
        path.resolve(absoluteBaseUrl, pathToResolve)
      ),
    });
  }
  // If there is no match-all path specified in the paths section of tsconfig, then try to match
  // all paths relative to baseUrl, this is how typescript works.
  if (!paths["*"] && addMatchAll) {
    absolutePaths.push({
      pattern: "*",
      paths: [`${absoluteBaseUrl.replace(/\/$/, "")}/*`],
    });
  }

  return absolutePaths;
}

/**
 * Sort path patterns.