feat: make mock usable not just from tests

lact-daemon/src/server/gpu_controller/intel/drm/mock.rs

@@ -2,6 +2,7 @@ use super::{DrmProvider, VramInfo};
 use crate::server::handler::SnapshotDeviceInfo;
 use lact_schema::IntelDrmInfo;
 use std::path::Path;
+use tracing::info;
 
 pub struct MockDrmProvider {
     snapshot: SnapshotDeviceInfo,
@@ -10,9 +11,11 @@ pub struct MockDrmProvider {
 impl MockDrmProvider {
     pub fn new(sysfs: &Path) -> Option<Self> {
         let info_path = sysfs.parent()?.parent()?.join("info.json");
-        let raw_snapshot = std::fs::read_to_string(info_path).ok()?;
+        let raw_snapshot = std::fs::read_to_string(&info_path).ok()?;
         let snapshot = serde_json::from_str(&raw_snapshot).expect("could not parse snapshot");
 
+        info!("using mock device info from {}", info_path.display());
+
         Some(Self { snapshot })
     }
 }

lact/Cargo.toml

@@ -7,6 +7,7 @@ edition.workspace = true
 default = ["lact-gui", "nvidia", "display-info"]
 nvidia = ["lact-daemon/nvidia"]
 display-info = ["lact-daemon/display-info"]
+mock = ["lact-daemon/mock"]
 
 [dependencies]
 lact-daemon = { path = "../lact-daemon", default-features = false }