refactor(args.rs): make the flags id slices and the default values as a const (#2733)

Co-authored-by: extrawurst <776816+extrawurst@users.noreply.github.com>

src/args.rs

@@ -12,6 +12,16 @@ use std::{
 	path::PathBuf,
 };
 
+const BUG_REPORT_FLAG_ID: &str = "bugreport";
+const LOG_FILE_FLAG_ID: &str = "logfile";
+const LOGGING_FLAG_ID: &str = "logging";
+const THEME_FLAG_ID: &str = "theme";
+const WORKDIR_FLAG_ID: &str = "workdir";
+const GIT_DIR_FLAG_ID: &str = "directory";
+const WATCHER_FLAG_ID: &str = "watcher";
+const DEFAULT_THEME: &str = "theme.ron";
+const DEFAULT_GIT_DIR: &str = ".";
+
 pub struct CliArgs {
 	pub theme: PathBuf,
 	pub repo_path: RepoPath,
@@ -23,20 +33,23 @@ pub fn process_cmdline() -> Result<CliArgs> {
 
 	let arg_matches = app.get_matches();
 
-	if arg_matches.get_flag("bugreport") {
+	if arg_matches.get_flag(BUG_REPORT_FLAG_ID) {
 		bug_report::generate_bugreport();
 		std::process::exit(0);
 	}
-	if arg_matches.get_flag("logging") {
+	if arg_matches.get_flag(LOGGING_FLAG_ID) {
-		let logfile = arg_matches.get_one::<String>("logfile");
+		let logfile = arg_matches.get_one::<String>(LOG_FILE_FLAG_ID);
 		setup_logging(logfile.map(PathBuf::from))?;
 	}
 
-	let workdir =
+	let workdir = arg_matches
-		arg_matches.get_one::<String>("workdir").map(PathBuf::from);
+		.get_one::<String>(WORKDIR_FLAG_ID)
-	let gitdir = arg_matches
+		.map(PathBuf::from);
-		.get_one::<String>("directory")
+	let gitdir =
-		.map_or_else(|| PathBuf::from("."), PathBuf::from);
+		arg_matches.get_one::<String>(GIT_DIR_FLAG_ID).map_or_else(
+			|| PathBuf::from(DEFAULT_GIT_DIR),
+			PathBuf::from,
+		);
 
 	let repo_path = if let Some(w) = workdir {
 		RepoPath::Workdir { gitdir, workdir: w }
@@ -45,8 +58,8 @@ pub fn process_cmdline() -> Result<CliArgs> {
 	};
 
 	let arg_theme = arg_matches
-		.get_one::<String>("theme")
+		.get_one::<String>(THEME_FLAG_ID)
-		.map_or_else(|| PathBuf::from("theme.ron"), PathBuf::from);
+		.map_or_else(|| PathBuf::from(DEFAULT_THEME), PathBuf::from);
 
 	let confpath = get_app_config_path()?;
 	fs::create_dir_all(&confpath).with_context(|| {
@@ -58,7 +71,7 @@ pub fn process_cmdline() -> Result<CliArgs> {
 	let theme = confpath.join(arg_theme);
 
 	let notify_watcher: bool =
-		*arg_matches.get_one("watcher").unwrap_or(&false);
+		*arg_matches.get_one(WATCHER_FLAG_ID).unwrap_or(&false);
 
 	Ok(CliArgs {
 		theme,
@@ -84,40 +97,40 @@ fn app() -> ClapApp {
 		",
 		)
 		.arg(
-			Arg::new("theme")
+			Arg::new(THEME_FLAG_ID)
 				.help("Set color theme filename loaded from config directory")
 				.short('t')
 				.long("theme")
 				.value_name("THEME_FILE")
-				.default_value("theme.ron")
+				.default_value(DEFAULT_THEME)
 				.num_args(1),
 		)
 		.arg(
-			Arg::new("logging")
+			Arg::new(LOGGING_FLAG_ID)
 				.help("Store logging output into a file (in the cache directory by default)")
 				.short('l')
 				.long("logging")
                 .default_value_if("logfile", ArgPredicate::IsPresent, "true")
 				.action(clap::ArgAction::SetTrue),
 		)
-        .arg(Arg::new("logfile")
+        .arg(Arg::new(LOG_FILE_FLAG_ID)
             .help("Store logging output into the specified file (implies --logging)")
             .long("logfile")
             .value_name("LOG_FILE"))
 		.arg(
-			Arg::new("watcher")
+			Arg::new(WATCHER_FLAG_ID)
 				.help("Use notify-based file system watcher instead of tick-based update. This is more performant, but can cause issues on some platforms. See https://github.com/gitui-org/gitui/blob/master/FAQ.md#watcher for details.")
 				.long("watcher")
 				.action(clap::ArgAction::SetTrue),
 		)
 		.arg(
-			Arg::new("bugreport")
+			Arg::new(BUG_REPORT_FLAG_ID)
 				.help("Generate a bug report")
 				.long("bugreport")
 				.action(clap::ArgAction::SetTrue),
 		)
 		.arg(
-			Arg::new("directory")
+			Arg::new(GIT_DIR_FLAG_ID)
 				.help("Set the git directory")
 				.short('d')
 				.long("directory")
@@ -125,7 +138,7 @@ fn app() -> ClapApp {
 				.num_args(1),
 		)
 		.arg(
-			Arg::new("workdir")
+			Arg::new(WORKDIR_FLAG_ID)
 				.help("Set the working directory")
 				.short('w')
 				.long("workdir")