formatter + implement status history

agent/src/cpu.rs

@@ -1,6 +1,6 @@
-use std::collections::HashMap;
 use anyhow::anyhow;
 use common::metrics::CPUBreakdown;
+use std::collections::HashMap;
 
 #[derive(Default, Debug, Clone, Copy)]
 struct CPUValues {
@@ -18,8 +18,16 @@ struct CPUValues {
 
 impl CPUValues {
     pub fn total(&self) -> u64 {
-        self.user + self.nice + self.system + self.idle + self.iowait +
-        self.irq + self.softirq + self.steal + self.guest + self.guest_nice
+        self.user
+            + self.nice
+            + self.system
+            + self.idle
+            + self.iowait
+            + self.irq
+            + self.softirq
+            + self.steal
+            + self.guest
+            + self.guest_nice
     }
 }
 
@@ -29,7 +37,9 @@ pub struct CPUStatReader {
 
 impl CPUStatReader {
     pub fn new() -> Self {
-        Self { previous_stats: HashMap::new() }
+        Self {
+            previous_stats: HashMap::new(),
+        }
     }
 
     pub fn read_global_cpu_stats(&mut self) -> anyhow::Result<CPUBreakdown> {
@@ -46,7 +56,8 @@ impl CPUStatReader {
     fn parse_cpu_line(&mut self, line: &str) -> anyhow::Result<CPUBreakdown> {
         let mut parts = line.split_whitespace();
 
-        let cpu_name = parts.next()
+        let cpu_name = parts
+            .next()
             .ok_or_else(|| anyhow!("missing cpu name"))?
             .to_string();
 
@@ -80,7 +91,11 @@ impl CPUStatReader {
         Ok(percentages)
     }
 
-    fn calculate_percentages(&self, current: &CPUValues, previous: Option<CPUValues>) -> CPUBreakdown {
+    fn calculate_percentages(
+        &self,
+        current: &CPUValues,
+        previous: Option<CPUValues>,
+    ) -> CPUBreakdown {
         let Some(prev) = previous else {
             return CPUBreakdown::default();
         };
@@ -90,9 +105,8 @@ impl CPUStatReader {
             return CPUBreakdown::default();
         }
 
-        let calculate_pct = |current: u64, prev: u64| {
-            (current.saturating_sub(prev) as f32 / total_delta) * 100.0
-        };
+        let calculate_pct =
+            |current: u64, prev: u64| (current.saturating_sub(prev) as f32 / total_delta) * 100.0;
 
         CPUBreakdown {
             system: calculate_pct(current.system, prev.system),