[WIP] Daemon & CLI

iota-daemon-lib/src/deployment.rs

@@ -0,0 +1,37 @@
+use iota_ipc::{DeploymentMode, SupervisorKind};
+
+#[derive(Clone, Copy, Debug)]
+pub struct DeploymentContext {
+    pub mode: DeploymentMode,
+    pub supervisor: SupervisorKind,
+}
+
+impl Default for DeploymentContext {
+    fn default() -> Self {
+        Self {
+            mode: DeploymentMode::External,
+            supervisor: SupervisorKind::None,
+        }
+    }
+}
+
+pub fn from_environment() -> DeploymentContext {
+    let mut mode = match std::env::var("IOTA_DEPLOYMENT_MODE").ok().as_deref() {
+        Some("session_child") => DeploymentMode::SessionChild,
+        Some("ui_auto_start") => DeploymentMode::UiAutoStart,
+        Some("user_service") => DeploymentMode::UserService,
+        Some("system_socket_activated") => DeploymentMode::SystemSocketActivated,
+        Some("system_always_on") => DeploymentMode::SystemAlwaysOn,
+        _ => DeploymentMode::External,
+    };
+    if std::env::var("LISTEN_FDS").ok().as_deref() == Some("1") {
+        mode = DeploymentMode::SystemSocketActivated;
+    }
+    let supervisor = match std::env::var("IOTA_SUPERVISOR").ok().as_deref() {
+        Some("iota_ui") => SupervisorKind::IotaUi,
+        Some("systemd") => SupervisorKind::Systemd,
+        Some("external") => SupervisorKind::External,
+        _ => SupervisorKind::None,
+    };
+    DeploymentContext { mode, supervisor }
+}