astro/dist/core/routing/manifest/pattern.js

Astro is a modern site builder with web best practices, performance, and DX front-of-mind.

function getPattern(segments, base, addTrailingSlash) {
  const pathname = segments.map((segment) => {
    if (segment.length === 1 && segment[0].spread) {
      return "(?:\\/(.*?))?";
    } else {
      return "\\/" + segment.map((part) => {
        if (part.spread) {
          return "(.*?)";
        } else if (part.dynamic) {
          return "([^/]+?)";
        } else {
          return part.content.normalize().replace(/\?/g, "%3F").replace(/#/g, "%23").replace(/%5B/g, "[").replace(/%5D/g, "]").replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
        }
      }).join("");
    }
  }).join("");
  const trailing = addTrailingSlash && segments.length ? getTrailingSlashPattern(addTrailingSlash) : "$";
  let initial = "\\/";
  if (addTrailingSlash === "never" && base !== "/") {
    initial = "";
  }
  return new RegExp(`^${pathname || initial}${trailing}`);
}
function getTrailingSlashPattern(addTrailingSlash) {
  if (addTrailingSlash === "always") {
    return "\\/$";
  }
  if (addTrailingSlash === "never") {
    return "$";
  }
  return "\\/?$";
}
export {
  getPattern
};