bundles.ts

1) Given N endpoints, build map from endpoint -> dependency[]
2) Given endpoint -> dep map, build dep -> endpoint[] map
3) Apply user-provided function to the results from step 2 to build bundle manifest
4) Bundle endpoints according to map from step 3


bundle(["shop-app.html", "shop-list.html", "shop-cart.html"], analyzer, appShellHeuristic("end1.html"))

async bundle(url: string|string[], orchestrator?: BundleOrchestrator): Promise<DocumentCollection> {}

interface BundleManifest {
    // Map from entry point to contained files. The files in the map's // values are unique across the manifest.
    Map<string, string[]>: entries
}

interface BundleOrchestrator {
  (endpoints: string[], depsIndex: DepsIndex): BundleManifest
}

function sharedHeuristic(string?: appShell): BundleOrchestrator {
  return function(endpoints: string[], depsIndex: DepsIndex): BundleManifest {
    const manifest = new Map();
    const sharedDependencies = getSharedDeps(endpoints, depsIndex, sharingThreshold);
    manifest.set("shared.html", sharedDependencies)
    return manifest;
  }
}

function appShellHeuristic(string?: appShell): BundleOrchestrator {
  return function(endpoints: string[], depsIndex: DepsIndex): BundleManifest {
    const manifest = new Map();
    const sharedDependencies = getSharedDeps(endpoints, depsIndex, sharingThreshold);
    if (appShell) {
      // assign sharedDependencies to appShell
      manifest.get(appShell).add(sharedDependencies)
    } else {
      // Create a shared.html file that gets all shared dependencies
    }
  }
}

function myCustomBuild(appShell) {
   const heuristic = appShellHeuristic(appShell);
   return function(endpoints, depsIndex) {
     let manifest = heuristic(endpoints, depsIndex);
     manifest.transformArbitrarily();
     return manifest;
   }
}

/**
lazy dependency: ->
eager depdendency: =>

shop-app.html -> shop-list.html
shop-app.html -> shop-cart.html
shop-app.html -> shop-item.html
shop-app.html => shop-home.html
shop-list.html -> lazy-resources.html
shop-cart.html -> lazy-resources.html
shop-item.html -> lazy-resources.html
*/