refactor: exit codes

src/args.rs

@@ -1,10 +1,17 @@
 use crate::shell::initialization;
 
+pub enum Status {
+	Continue,
+	Exit, // version, help, etc.
+	Error,
+}
+
 // returns true if should exit
-pub fn handle_args() -> bool {
+pub fn handle_args() -> Status {
+	use Status::*;
 	let args = std::env::args().collect::<Vec<String>>();
 	if args.len() <= 1 {
-		return false;
+		return Continue;
 	}
 	let mut auto_aliasing = String::new();
 	let mut shell = String::new();
@@ -14,11 +21,11 @@ pub fn handle_args() -> bool {
 		match args[index].as_str() {
 			"-h" | "--help" => {
 				print_help();
-				return true;
+				return Exit;
 			}
 			"-v" | "--version" => {
 				print_version();
-				return true;
+				return Exit;
 			}
 			"-a" | "--alias" => {
 				if args.len() > index + 1 {
@@ -46,13 +53,13 @@ pub fn handle_args() -> bool {
 
 	if shell.is_empty() {
 		eprintln!("{}", t!("no-shell"));
-		return true;
+		return Error;
 	}
 
 	let binary_path = &args[0];
 
 	initialization(&shell, binary_path, &auto_aliasing, cnf);
-	return true;
+	Exit
 }
 
 fn print_help() {

src/main.rs

@@ -37,28 +37,39 @@ mod requests;
 extern crate rust_i18n;
 i18n!("i18n", fallback = "en", minify_key = true);
 
-fn main() -> Result<(), std::io::Error>{
+fn main() -> Result<(), std::io::Error> {
 	colored::control::set_override(true);
-	let mut data = {
-		let init = init();
-		if init.is_none() {
-			return Ok(());
-		} else {
-			init.unwrap()
+	let init = init();
+	let mut data = if let Err(status) = init {
+		match status {
+			args::Status::Exit => {
+				return Ok(());
+			}
+			args::Status::Error => {
+				return Err(std::io::Error::new(
+					std::io::ErrorKind::InvalidInput,
+					"Invalid input",
+				));
+			}
+			_ => {
+				unreachable!()
+			}
 		}
+	} else {
+		init.ok().unwrap()
 	};
 
 	data.expand_command();
 	use shell::Mode;
 	match data.mode {
 		Mode::Suggestion => modes::suggestion(&mut data),
-		Mode::CNF => modes::cnf(&mut data),
+		Mode::Cnf => modes::cnf(&mut data),
 	}
 
 	Ok(())
 }
 
-fn init() -> Option<shell::Data> {
+fn init() -> Result<shell::Data, args::Status> {
 	let locale = {
 		let sys_locale = get_locale().unwrap_or("en-US".to_string());
 		if sys_locale.len() < 2 {
@@ -69,9 +80,15 @@ fn init() -> Option<shell::Data> {
 	};
 	rust_i18n::set_locale(&locale[0..2]);
 
-	let exit = args::handle_args();
-	if exit {
-		return None;
+	let status = args::handle_args();
+	match status {
+		args::Status::Exit => {
+			return Err(status);
+		}
+		args::Status::Error => {
+			return Err(status);
+		}
+		_ => {}
 	}
 
 	#[cfg(feature = "request-ai")]
@@ -81,5 +98,5 @@ fn init() -> Option<shell::Data> {
 		}
 	}
 
-	Some(shell::Data::init())
+	Ok(shell::Data::init())
 }

src/modes.rs

@@ -12,7 +12,7 @@ pub fn suggestion(data: &mut Data) {
 
 	loop {
 		let suggestion = {
-			let command = suggest_command(&data);
+			let command = suggest_command(data);
 			if command.is_none() {
 				break;
 			};
@@ -32,13 +32,19 @@ pub fn suggestion(data: &mut Data) {
 			difference.unwrap()
 		};
 
-		let execution =
-			suggestions::confirm_suggestion(&data, &highlighted_suggestion);
+		let execution = suggestions::confirm_suggestion(data, &highlighted_suggestion);
 		if execution.is_ok() {
 			return;
 		} else {
 			data.update_command(&suggestion);
-			let msg = Some(execution.err().unwrap().split_whitespace().collect::<Vec<&str>>().join(" "));
+			let msg = Some(
+				execution
+					.err()
+					.unwrap()
+					.split_whitespace()
+					.collect::<Vec<&str>>()
+					.join(" "),
+			);
 			data.update_error(msg);
 
 			let retry_message = format!("{}...", t!("retry"));
@@ -71,7 +77,7 @@ pub fn cnf(data: &mut Data) {
 
 		let highlighted_suggestion =
 			highlight_difference(&shell, &suggestion, &last_command).unwrap();
-		let _ = suggestions::confirm_suggestion(&data, &highlighted_suggestion);
+		let _ = suggestions::confirm_suggestion(data, &highlighted_suggestion);
 	} else {
 		let package_manager = match system::get_package_manager(&shell) {
 			Some(package_manager) => package_manager,
@@ -100,7 +106,7 @@ pub fn cnf(data: &mut Data) {
 
 		// retry after installing package
 		if system::install_package(&shell, &package_manager, &package) {
-			let _ = suggestions::confirm_suggestion(&data, &last_command);
+			let _ = suggestions::confirm_suggestion(data, &last_command);
 		}
 	}
 }

src/shell.rs

@@ -1,9 +1,9 @@
 use std::process::exit;
 
+use std::collections::HashMap;
 use std::sync::mpsc::channel;
 use std::thread;
 use std::time::Duration;
-use std::collections::HashMap;
 
 use regex_lite::Regex;
 
@@ -11,7 +11,7 @@ pub const PRIVILEGE_LIST: [&str; 2] = ["sudo", "doas"];
 
 pub enum Mode {
 	Suggestion,
-	CNF,
+	Cnf,
 }
 
 pub struct Data {
@@ -70,7 +70,7 @@ impl Data {
 			return;
 		}
 		let alias = self.alias.as_ref().unwrap();
-		if let Some(suggest) = expand_alias_multiline(alias, &self.suggest.as_ref().unwrap()) {
+		if let Some(suggest) = expand_alias_multiline(alias, self.suggest.as_ref().unwrap()) {
 			self.update_suggest(&suggest);
 		}
 	}
@@ -98,7 +98,7 @@ impl Data {
 	}
 
 	pub fn update_suggest(&mut self, suggest: &str) {
-		let split = split_command(&suggest);
+		let split = split_command(suggest);
 		if PRIVILEGE_LIST.contains(&split[0].as_str()) {
 			self.suggest = Some(suggest.replacen(&split[0], "", 1));
 			self.privilege = Some(split[0].clone())
@@ -195,13 +195,11 @@ pub fn last_command(shell: &str) -> String {
 
 pub fn run_mode() -> Mode {
 	match std::env::var("_PR_MODE") {
-		Ok(mode) => {
-			match mode.as_str() {
-				"suggestion" => Mode::Suggestion,
-				"cnf" => Mode::CNF,
-				_ => Mode::Suggestion,
-			}
-		}
+		Ok(mode) => match mode.as_str() {
+			"suggestion" => Mode::Suggestion,
+			"cnf" => Mode::Cnf,
+			_ => Mode::Suggestion,
+		},
 		Err(_) => Mode::Suggestion,
 	}
 }
@@ -256,11 +254,8 @@ pub fn expand_alias(map: &HashMap<String, String>, command: &str) -> Option<Stri
 	} else {
 		command
 	};
-	if let Some(expand) = map.get(command) {
-		Some(command.replacen(&command, expand, 1))
-	} else {
-		None
-	}
+	map.get(command)
+		.map(|expand| command.replacen(command, expand, 1))
 }
 
 pub fn expand_alias_multiline(map: &HashMap<String, String>, command: &str) -> Option<String> {
@@ -268,7 +263,7 @@ pub fn expand_alias_multiline(map: &HashMap<String, String>, command: &str) -> O
 	let mut expanded = String::new();
 	let mut expansion = false;
 	for line in lines {
-		if let Some(expand) = expand_alias(&map, line){
+		if let Some(expand) = expand_alias(map, line) {
 			expanded = format!("{}\n{}", expanded, expand);
 			expansion = true;
 		} else {

src/suggestions.rs

@@ -7,7 +7,7 @@ use regex_lite::Regex;
 
 use crate::files::{get_best_match_file, get_path_files};
 use crate::rules::match_pattern;
-use crate::shell::{Data, shell_evaluated_commands};
+use crate::shell::{shell_evaluated_commands, Data};
 
 pub fn suggest_command(data: &Data) -> Option<String> {
 	let shell = &data.shell;
@@ -50,8 +50,8 @@ pub fn suggest_command(data: &Data) -> Option<String> {
 
 		// skip for commands with no arguments,
 		// very likely to be an error showing the usage
-		if privilege.is_some() && split_command.len() > 2 ||
-			privilege.is_none() && split_command.len() > 1
+		if privilege.is_some() && split_command.len() > 2
+			|| privilege.is_none() && split_command.len() > 1
 		{
 			let suggest = ai_suggestion(command, error);
 			if let Some(suggest) = suggest {
@@ -254,10 +254,10 @@ pub fn confirm_suggestion(data: &Data, highlighted: &str) -> Result<(), String>
 	let command = &data.suggest.clone().unwrap();
 
 	let now = Instant::now();
-	let process = run_suggestion(data, &command);
+	let process = run_suggestion(data, command);
 
 	if process.success() {
-		let cd = shell_evaluated_commands(shell, &command);
+		let cd = shell_evaluated_commands(shell, command);
 		if let Some(cd) = cd {
 			println!("{}", cd);
 		}
@@ -284,28 +284,24 @@ fn run_suggestion(data: &Data, command: &str) -> std::process::ExitStatus {
 	let shell = &data.shell;
 	let privilege = &data.privilege;
 	match privilege {
-		Some(sudo) => {
-			std::process::Command::new(sudo)
-				.arg(shell)
-				.arg("-c")
-				.arg(command)
-				.stdout(stderr())
-				.stderr(Stdio::inherit())
-				.spawn()
-				.expect("failed to execute process")
-				.wait()
-				.unwrap()
-		}
-		None => {
-			std::process::Command::new(shell)
-				.arg("-c")
-				.arg(command)
-				.stdout(stderr())
-				.stderr(Stdio::inherit())
-				.spawn()
-				.expect("failed to execute process")
-				.wait()
-				.unwrap()
-		}
+		Some(sudo) => std::process::Command::new(sudo)
+			.arg(shell)
+			.arg("-c")
+			.arg(command)
+			.stdout(stderr())
+			.stderr(Stdio::inherit())
+			.spawn()
+			.expect("failed to execute process")
+			.wait()
+			.unwrap(),
+		None => std::process::Command::new(shell)
+			.arg("-c")
+			.arg(command)
+			.stdout(stderr())
+			.stderr(Stdio::inherit())
+			.spawn()
+			.expect("failed to execute process")
+			.wait()
+			.unwrap(),
 	}
 }