NewInstall computes and returns the installation state for a service.

NewRun computes and returns the current runtime status of a service.

Installed means everything is good, the service is properly registered.

go:generate stringer -type=RunState.

NotInstalled means launchd has never heard of the service.

go:generate stringer -type=RunState.

PlistPresentButNotLoaded means the file exists but hasn't been registered.

go:generate stringer -type=RunState.

go:generate stringer -type=RunState.

Unknown when we failed to find out.

Install describes the current installation state of a launchd service.

Run describes the current runtime state of a launchd service.

Installable is the interface we depend on to determine install state.

Runnable is the interface we depend on to determine a service's run state.

RunState enumerates the runtime states that a launchd service may be in.