sdk/fidl/fuchsia.sys2/runtime/component.fidl

// Copyright 2018 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

library fuchsia.sys2;

// A component is a unit of executable software.
//
// This object provides the component's declaration, access to its package's
// content, and relevant metadata.
table Component {
    // The resolved URL of the component.
    // This is the canonical URL obtained by the component resolver after
    // after following redirects and resolving relative paths.
    1: string resolved_url;

    // The component's declaration.
    // This information is typically obtained from the component's manifest
    // or generated by the component resolver.
    2: ComponentDecl decl;

    // The package that contains the component.
    // By convention, the component's package is mapped to "/pkg" in its
    // namespace at runtime.
    //
    // This is null if the component is not represented as a package.
    // In that case, it is the runner's responsibility to load the component's
    // resource from the |resolved_url|.  This mechanism is used for web
    // applications.
    //
    // TODO(CP-154): It might be better to return a package loader interface
    // here instead of immediately providing the package's content.
    // That would allow for finer grained pipelining of component installation
    // and launching of the component's runner.  Moreover, sometimes we only
    // need the component's declarative information.
    3: Package package;
};