.rustfmt.toml

@@ -1,3 +1,6 @@
+# Taken from https://github.com/cull-os/carcass.
+# Modified to have 2 space indents and 80 line width.
+
 # float_literal_trailing_zero  = "Always" # TODO: Warning for some reason?
 condense_wildcard_suffixes   = true
 doc_comment_code_block_width = 80

.taplo.toml

@@ -1,3 +1,5 @@
+# Taken from https://github.com/cull-os/carcass.
+
 [formatting]
 align_entries         = true
 column_width          = 100

build.rs

@@ -0,0 +1,57 @@
+use std::{
+  env,
+  fs,
+  path::PathBuf,
+};
+
+const MULTICALL_NAMES: &[&str] = &["cpu", "power"];
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+  println!("cargo:rerun-if-changed=build.rs");
+  println!("cargo:rerun-if-changed=target");
+
+  let out_dir = PathBuf::from(env::var("OUT_DIR")?);
+  let target = out_dir
+        .parent() // target/debug/build/<pkg>-<hash>/out
+        .and_then(|p| p.parent()) // target/debug/build/<pkg>-<hash>
+        .and_then(|p| p.parent()) // target/debug/
+        .ok_or("failed to find target directory")?;
+
+  let main_binary_name = env::var("CARGO_PKG_NAME")?;
+
+  let main_binary_path = target.join(&main_binary_name);
+
+  let mut errored = false;
+
+  for name in MULTICALL_NAMES {
+    let hardlink_path = target.join(name);
+
+    if hardlink_path.exists() {
+      if hardlink_path.is_dir() {
+        fs::remove_dir_all(&hardlink_path)?;
+      } else {
+        fs::remove_file(&hardlink_path)?;
+      }
+    }
+
+    if let Err(error) = fs::hard_link(&main_binary_path, &hardlink_path) {
+      println!(
+        "cargo:warning=failed to create hard link '{path}': {error}",
+        path = hardlink_path.display(),
+      );
+      errored = true;
+    }
+  }
+
+  if errored {
+    println!(
+      "cargo:warning=this often happens because the target binary isn't built \
+       yet, try running `cargo build` again"
+    );
+    println!(
+      "cargo:warning=keep in mind that this is for development purposes only"
+    );
+  }
+
+  Ok(())
+}

config.toml

@@ -5,27 +5,28 @@
 
 # Emergency thermal protection (highest priority).
 [[rule]]
-if       = { value = "$cpu-temperature", is-more-than = 85.0 }
-priority = 100
-
 cpu.energy-performance-preference = "power"
 cpu.frequency-mhz-maximum         = 2000
 cpu.governor                      = "powersave"
 cpu.turbo                         = false
+if                                = { value = "$cpu-temperature", is-more-than = 85.0 }
+priority                          = 100
 
 # Critical battery preservation.
 [[rule]]
-if.all   = [ "?discharging", { value = "%power-supply-charge", is-less-than = 0.3 } ]
-priority = 90
-
 cpu.energy-performance-preference = "power"
-cpu.frequency-mhz-maximum         = 800         # More aggressive below critical threshold.
+cpu.frequency-mhz-maximum         = 800                                                                        # More aggressive below critical threshold.
 cpu.governor                      = "powersave"
 cpu.turbo                         = false
+if.all                            = [ "?discharging", { value = "%power-supply-charge", is-less-than = 0.3 } ]
 power.platform-profile            = "low-power"
+priority                          = 90
 
 # High performance mode for sustained high load.
 [[rule]]
+cpu.energy-performance-preference = "performance"
+cpu.governor = "performance"
+cpu.turbo = true
 if.all = [
   { value = "%cpu-usage", is-more-than = 0.8 },
   { value = "$cpu-idle-seconds", is-less-than = 30.0 },
@@ -33,12 +34,12 @@ if.all = [
 ]
 priority = 80
 
-cpu.energy-performance-preference = "performance"
-cpu.governor                      = "performance"
-cpu.turbo                         = true
-
 # Performance mode when not discharging.
 [[rule]]
+cpu.energy-performance-bias = "balance_performance"
+cpu.energy-performance-preference = "performance"
+cpu.governor = "performance"
+cpu.turbo = true
 if.all = [
   { not = "?discharging" },
   { value = "%cpu-usage", is-more-than = 0.1 },
@@ -46,66 +47,56 @@ if.all = [
 ]
 priority = 70
 
-cpu.energy-performance-bias       = "balance_performance"
-cpu.energy-performance-preference = "performance"
-cpu.governor                      = "performance"
-cpu.turbo                         = true
-
 # Moderate performance for medium load.
 [[rule]]
+cpu.energy-performance-preference = "balance_performance"
+cpu.governor = "schedutil"
 if.all = [
   { value = "%cpu-usage", is-more-than = 0.4 },
   { value = "%cpu-usage", is-less-than = 0.8 },
 ]
 priority = 60
 
-cpu.energy-performance-preference = "balance_performance"
-cpu.governor                      = "schedutil"
-
 # Power saving during low activity.
 [[rule]]
+cpu.energy-performance-preference = "power"
+cpu.governor = "powersave"
+cpu.turbo = false
 if.all = [
   { value = "%cpu-usage", is-less-than = 0.2 },
   { value = "$cpu-idle-seconds", is-more-than = 60.0 },
 ]
 priority = 50
 
-cpu.energy-performance-preference = "power"
-cpu.governor                      = "powersave"
-cpu.turbo                         = false
-
 # Extended idle power optimization.
 [[rule]]
-if       = { value = "$cpu-idle-seconds", is-more-than = 300.0 }
-priority = 40
-
 cpu.energy-performance-preference = "power"
 cpu.frequency-mhz-maximum         = 1600
 cpu.governor                      = "powersave"
 cpu.turbo                         = false
+if                                = { value = "$cpu-idle-seconds", is-more-than = 300.0 }
+priority                          = 40
 
 # Battery conservation when discharging.
 [[rule]]
-if.all   = [ "?discharging", { value = "%power-supply-charge", is-less-than = 0.5 } ]
-priority = 30
-
 cpu.energy-performance-preference = "power"
 cpu.frequency-mhz-maximum         = 2000
 cpu.governor                      = "powersave"
 cpu.turbo                         = false
+if.all                            = [ "?discharging", { value = "%power-supply-charge", is-less-than = 0.5 } ]
 power.platform-profile            = "low-power"
+priority                          = 30
 
 # General battery mode.
 [[rule]]
-if       = "?discharging"
-priority = 20
-
 cpu.energy-performance-bias       = "balance_power"
 cpu.energy-performance-preference = "power"
 cpu.frequency-mhz-maximum         = 1800
 cpu.frequency-mhz-minimum         = 200
 cpu.governor                      = "powersave"
 cpu.turbo                         = false
+if                                = "?discharging"
+priority                          = 20
 
 # Balanced performance for general use. Default fallback rule.
 [[rule]]

src/power_supply.rs

@@ -227,13 +227,10 @@ impl PowerSupply {
         }
       }
       // Check for model name that indicates a peripheral
-      if let Some(model_name) = fs::read(self.path.join("model_name"))
+      if let Some(model) = fs::read(self.path.join("model_name"))
         .with_context(|| format!("failed to read the model name of {self}"))?
       {
-        let model_name_lower = model_name.to_lowercase();
+        if model.contains("bluetooth") || model.contains("wireless") {
-        if model_name_lower.contains("bluetooth")
-          || model_name_lower.contains("wireless")
-        {
           break 'is_from_peripheral true;
         }
       }

src/system.rs

@@ -295,8 +295,8 @@ impl System {
         "stripped content is a valid number, taking it as the core number"
       );
       log::debug!(
-        "it is fine if this number doesn't seem accurate due to CPU binning, see a more detailed explanation at: https://rgbcu.be/blog/why-cores"
+                "it is fine if this number doesn't seem accurate due to CPU binning, see a more detailed explanation at: https://rgbcu.be/blog/why-cores"
-      );
+            );
 
       let Some(temperature_mc) =
         fs::read_n::<i64>(&input_path).with_context(|| {