watt: turn into a library

Cargo.toml

@@ -1,12 +1,17 @@
-[package]
-name         = "watt"
-description  = "Modern CPU frequency and power management utility for Linux"
-version      = "0.4.0"
-edition      = "2024"
-authors      = [ "NotAShelf <raf@notashelf.dev>", "RGBCube <git@rgbcu.be>" ]
-rust-version = "1.85"
+[workspace]
+members  = [ "watt" ]
+resolver = "3"
 
-[dependencies]
+[workspace.package]
+authors      = [ "NotAShelf <raf@notashelf.dev>", "RGBCube <git@rgbcu.be>" ]
+description  = "Modern CPU frequency and power management utility for Linux"
+edition      = "2024"                                                        # Keep in sync with .rustfmt.toml.
+license      = "MPL-2.0"
+repository   = "https://github.com/notashelf/watt"
+rust-version = "1.85"
+version      = "0.4.0"
+
+[workspace.dependencies]
 anyhow              = "1.0"
 clap                = { version = "4.0", features = [ "derive", "env" ] }
 clap-verbosity-flag = "3.0.2"

watt/Cargo.toml

@@ -0,0 +1,28 @@
+[package]
+name                   = "watt"
+description.workspace  = true
+version.workspace      = true
+edition.workspace      = true
+authors.workspace      = true
+rust-version.workspace = true
+
+[lib]
+path = "lib.rs"
+
+[[bin]]
+name = "watt"
+path = "main.rs"
+
+[dependencies]
+anyhow.workspace              = true
+clap.workspace                = true
+clap-verbosity-flag.workspace = true
+ctrlc.workspace               = true
+derive_more.workspace         = true
+env_logger.workspace          = true
+log.workspace                 = true
+num_cpus.workspace            = true
+serde.workspace               = true
+thiserror.workspace           = true
+toml.workspace                = true
+yansi.workspace               = true

watt/config.rs

@@ -523,7 +523,7 @@ pub struct DaemonConfig {
 }
 
 impl DaemonConfig {
-  const DEFAULT: &str = include_str!("../config.toml");
+  const DEFAULT: &str = include_str!("config.toml");
 
   pub fn load_from(path: Option<&Path>) -> anyhow::Result<Self> {
     let contents = if let Some(path) = path {

watt/lib.rs

@@ -1,37 +1,27 @@
-mod cpu;
-mod power_supply;
-mod system;
+use std::path::PathBuf;
 
-mod fs;
-
-mod config;
-// mod core;
-mod daemon;
-// mod engine;
-// mod monitor;
-
-use std::{
-  fmt::Write as _,
-  io,
-  io::Write as _,
-  path::PathBuf,
-  process,
-};
-
-use anyhow::Context;
+use anyhow::Context as _;
 use clap::Parser as _;
-use yansi::Paint as _;
+
+pub mod cpu;
+pub mod power_supply;
+pub mod system;
+
+pub mod fs;
+
+pub mod config;
+pub mod daemon;
 
 #[derive(clap::Parser, Debug)]
 #[clap(author, version, about)]
-struct Cli {
+pub struct Cli {
   #[clap(subcommand)]
   command: Command,
 }
 
 #[derive(clap::Parser, Debug)]
 #[clap(multicall = true)]
-enum Command {
+pub enum Command {
   /// Watt daemon.
   Watt {
     #[command(flatten)]
@@ -62,18 +52,18 @@ enum Command {
 }
 
 #[derive(clap::Parser, Debug)]
-enum CpuCommand {
+pub enum CpuCommand {
   /// Modify CPU attributes.
   Set(config::CpuDelta),
 }
 
 #[derive(clap::Parser, Debug)]
-enum PowerCommand {
+pub enum PowerCommand {
   /// Modify power supply attributes.
   Set(config::PowerDelta),
 }
 
-fn real_main() -> anyhow::Result<()> {
+pub fn main() -> anyhow::Result<()> {
   let cli = Cli::parse();
 
   yansi::whenever(yansi::Condition::TTY_AND_COLOR);
@@ -107,52 +97,3 @@ fn real_main() -> anyhow::Result<()> {
     } => delta.apply(),
   }
 }
-
-fn main() {
-  let Err(error) = real_main() else {
-    return;
-  };
-
-  let mut err = io::stderr();
-
-  let mut message = String::new();
-  let mut chain = error.chain().rev().peekable();
-
-  while let Some(error) = chain.next() {
-    let _ = write!(
-      err,
-      "{header} ",
-      header = if chain.peek().is_none() {
-        "error:"
-      } else {
-        "cause:"
-      }
-      .red()
-      .bold(),
-    );
-
-    String::clear(&mut message);
-    let _ = write!(message, "{error}");
-
-    let mut chars = message.char_indices();
-
-    let _ = match (chars.next(), chars.next()) {
-      (Some((_, first)), Some((second_start, second)))
-        if second.is_lowercase() =>
-      {
-        writeln!(
-          err,
-          "{first_lowercase}{rest}",
-          first_lowercase = first.to_lowercase(),
-          rest = &message[second_start..],
-        )
-      },
-
-      _ => {
-        writeln!(err, "{message}")
-      },
-    };
-  }
-
-  process::exit(1);
-}

watt/main.rs

@@ -0,0 +1,57 @@
+use std::{
+  fmt::Write as _,
+  io,
+  io::Write as _,
+  process,
+};
+
+use yansi::Paint as _;
+
+fn main() {
+  let Err(error) = watt::main() else {
+    return;
+  };
+
+  let mut err = io::stderr();
+
+  let mut message = String::new();
+  let mut chain = error.chain().rev().peekable();
+
+  while let Some(error) = chain.next() {
+    let _ = write!(
+      err,
+      "{header} ",
+      header = if chain.peek().is_none() {
+        "error:"
+      } else {
+        "cause:"
+      }
+      .red()
+      .bold(),
+    );
+
+    String::clear(&mut message);
+    let _ = write!(message, "{error}");
+
+    let mut chars = message.char_indices();
+
+    let _ = match (chars.next(), chars.next()) {
+      (Some((_, first)), Some((second_start, second)))
+        if second.is_lowercase() =>
+      {
+        writeln!(
+          err,
+          "{first_lowercase}{rest}",
+          first_lowercase = first.to_lowercase(),
+          rest = &message[second_start..],
+        )
+      },
+
+      _ => {
+        writeln!(err, "{message}")
+      },
+    };
+  }
+
+  process::exit(1);
+}