Method load

src/module/manager.cpp:359–395

We load the module manifests sequentially in an alphabetical order. If an error is encountered while processing a particular manifest, we do not load the remaining manifests and exit with the appropriate error message.

// error is encountered while processing a particular manifest, we do not load
// the remaining manifests and exit with the appropriate error message.
Try<Nothing> ModuleManager::load(const string& modulesDir)
{
  Try<list<string>> moduleManifests = os::ls(modulesDir);
  if (moduleManifests.isError()) {
    return Error(
        "Error loading module manifests from '" + modulesDir + "' directory: " +
        moduleManifests.error());
  }

  moduleManifests->sort();
  foreach (const string& filename, moduleManifests.get()) {
    const string filepath = path::join(modulesDir, filename);
    VLOG(1) << "Processing module manifest from '" << filepath << "'";

    Try<string> read = os::read(filepath);
    if (read.isError()) {
      return Error(
          "Error reading module manifest file '" + filepath + "': " +
          read.error());
    }

    Try<Modules> modules = flags::parse<Modules>(read.get());
    if (modules.isError()) {
      return Error(
          "Error parsing module manifest file '" + filepath + "': " +
          modules.error());
    }

    Try<Nothing> result = loadManifest(modules.get());
    if (result.isError()) {
      return Error(
          "Error loading modules from '" + filepath + "': " + result.error());
    }
  }

  return Nothing();
}