src/session/bin/component_manager/README.md - fuchsia - Git at Google

 # Component Manager for Session Framework

 Reviewed on: 2020-02-04

 This implementation of [Component Manager](/src/component/component_manager/README.md) allows command line tools to connect to services exposed by [`session_manager`](/src/session/bin/session_manager/README.md) at runtime.

 > TODO(fxbug.dev/45361): Remove this work-around implementation entirely.
 >
 > See below for details.

 ## Building, Running, and Testing

 Since this binary is exclusively run in the context of using [`session_manager`](/src/session/bin/session_manager/README.md), refer to the instructions there.

 ## Source layout

 The entrypoint is in `src/main.rs`.

 ## Details

 It is currently impossible for a command line tool to acquire a service directly from a v2 component. This workaround uses a custom implementation of Component Manager to bridge service brokerage between the world of v1 components and v2 components.

 This implementation exposes services from its child's `exec/expose/svc` outgoing directory in *its* `out/svc` directory.

 Used in combination with `sysmgr`'s knowledge of components' `out/svc` directories, this component can be used to allow command line tools to ask for specific services and have them provided by an instance of `session_manager`.

 For example, it provides [session_manager.config](/src/session/bin/session_manager/meta/session_manager.config) to `sysmgr` and allows [session_control](/src/session/tools/session_control/README.md) to connect to the `fuchsia.session.Launcher` service through `session_control`'s environment.
	# Component Manager for Session Framework

	Reviewed on: 2020-02-04

	This implementation of [Component Manager](/src/component/component_manager/README.md) allows command line tools to connect to services exposed by [`session_manager`](/src/session/bin/session_manager/README.md) at runtime.

	> TODO(fxbug.dev/45361): Remove this work-around implementation entirely.
	>
	> See below for details.

	## Building, Running, and Testing

	Since this binary is exclusively run in the context of using [`session_manager`](/src/session/bin/session_manager/README.md), refer to the instructions there.

	## Source layout

	The entrypoint is in `src/main.rs`.

	## Details

	It is currently impossible for a command line tool to acquire a service directly from a v2 component. This workaround uses a custom implementation of Component Manager to bridge service brokerage between the world of v1 components and v2 components.

	This implementation exposes services from its child's `exec/expose/svc` outgoing directory in its `out/svc` directory.

	Used in combination with `sysmgr`'s knowledge of components' `out/svc` directories, this component can be used to allow command line tools to ask for specific services and have them provided by an instance of `session_manager`.

	For example, it provides [session_manager.config](/src/session/bin/session_manager/meta/session_manager.config) to `sysmgr` and allows [session_control](/src/session/tools/session_control/README.md) to connect to the `fuchsia.session.Launcher` service through `session_control`'s environment.