Replace Command with a new Task API with chain support

runtime/src/system.rs

@@ -1,6 +1,39 @@
 //! Access the native system.
-mod action;
-mod information;
+use crate::futures::futures::channel::oneshot;
 
-pub use action::Action;
-pub use information::Information;
+/// An operation to be performed on the system.
+#[derive(Debug)]
+pub enum Action {
+    /// Query system information and produce `T` with the result.
+    QueryInformation(oneshot::Sender<Information>),
+}
+
+/// Contains informations about the system (e.g. system name, processor, memory, graphics adapter).
+#[derive(Clone, Debug)]
+pub struct Information {
+    /// The operating system name
+    pub system_name: Option<String>,
+    /// Operating system kernel version
+    pub system_kernel: Option<String>,
+    /// Long operating system version
+    ///
+    /// Examples:
+    /// - MacOS 10.15 Catalina
+    /// - Windows 10 Pro
+    /// - Ubuntu 20.04 LTS (Focal Fossa)
+    pub system_version: Option<String>,
+    /// Short operating system version number
+    pub system_short_version: Option<String>,
+    /// Detailed processor model information
+    pub cpu_brand: String,
+    /// The number of physical cores on the processor
+    pub cpu_cores: Option<usize>,
+    /// Total RAM size, in bytes
+    pub memory_total: u64,
+    /// Memory used by this process, in bytes
+    pub memory_used: Option<u64>,
+    /// Underlying graphics backend for rendering
+    pub graphics_backend: String,
+    /// Model information for the active graphics adapter
+    pub graphics_adapter: String,
+}