version bump and updated README

Cargo.toml

@@ -1,11 +1,12 @@
 [package]
 name = "config"
-version = "0.3.0"
+version = "0.4.0"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+pico-args = "0.5.0"
 toml = "0.5.9"
 
 [profile.release]

README.md

@@ -3,3 +3,8 @@
 
 `config` is a command line configuration manager written in Rust.
 
+## Libraries
+
+- [pico-args](https://crates.io/crates/pico-args) — argument parsing
+- [toml](https://crates.io/crates/toml) — TOML file parsing
+

src/error.rs

@@ -9,17 +9,17 @@ pub fn no_args() {
 }
 
 pub fn missing_config(path: &PathBuf) {
-	println!("config: no config file found at {:?}", path);
+	println!("config: no config file found at {path:?}");
 	exit(2);
 }
 
 pub fn no_section(section: &String) {
-	println!("config: nothing specified for \"{}\"", section);
+	println!("config: nothing specified for \"{section}\"");
 	exit(3);
 }
 
 pub fn no_property(section: &String, property: &str) {
-	println!("config: \"{}\" has no property \"{}\"", section, property);
+	println!("config: \"{section}\" has no property \"{property}\"");
 	exit(4);
 }
 

src/main.rs

@@ -1,5 +1,5 @@
 use std::{
-	env::{ args, current_dir, var },
+	env::{ current_dir, var },
 	error::Error,
 	fs::read_to_string,
 	path::PathBuf,
@@ -9,6 +9,7 @@ use std::{
 	}
 };
 
+use pico_args::Arguments;
 use toml::{
 	Value,
 	value::Map
@@ -17,84 +18,62 @@ use toml::{
 mod error;
 
 fn main() -> Result<(), Box<dyn Error>>{
-	let home_dir = var("HOME").unwrap();
+	//	get args
+	let mut args = Arguments::from_env();
 
-	let mut config_path = PathBuf::from(&home_dir);
-	config_path.push(".config/config.toml");
-	if !config_path.exists() {
-		error::missing_config(&config_path);
+	//	handle help flag
+	if args.contains(["-h", "--help"]) {
+		help_text();
+		return Ok(());
 	}
 
+	//	get $HOME from env
+	let home_dir = var("HOME").unwrap();
+
+	//	build + validate config path
+	let mut config_path = PathBuf::from(&home_dir);
+	config_path.push(".config/config.toml");
+	if !config_path.exists() { error::missing_config(&config_path); }
+
+	//	build config table from toml
 	let raw_conf = read_to_string(config_path)?;
 	let toml_conf: Value = toml::from_str(raw_conf.as_str())?;
 	let config = toml_conf.as_table().unwrap();
 
+	//	get $EDITOR env
 	let i_editor = var("EDITOR");
 	let editor: Option<String> = if i_editor.is_ok() { Some(i_editor.unwrap()) } else { None };
 
 	let shell_default = if config.contains_key("shell") { config.get("shell").unwrap().as_bool().unwrap() } else { false };
 
-	let args: Vec<String> = args().skip(1).collect();
-	let mut dir  = false;
-	let mut list = false;
-	let mut path = false;
-
-	if args.len() == 0 {
-		error::no_args();
-	}
-	match args[0].as_str() {
-		"-d"		|
-		"--dir"		=> dir  = true,
-		"-l"		|
-		"--list"	=> list = true,
-		"-p"		|
-		"--path"	=> path = true,
-		"-h"		|
-		"--help"	=> {
-			help_text();
-			return Ok(());
-		}
-		_			=> {}
-	}
-
-	let start_index = if dir || list || path { 1 } else { 0 };
-
-	if list {
-		let mut section = config;
-		if args.len() > 1 {
-			let mut args = args.clone();
-			args.remove(0);
-			for arg in args {
-				let i_sub = section.get(arg.as_str());
-				if i_sub.is_none() { return Ok(()); }
-				let sub = i_sub.unwrap().as_table();
-				if sub.is_none() { return Ok(()); }
-				section = sub.unwrap();
-			}
-		}
-		for (key, value) in section.iter() {
-			if value.is_table() {
-				println!("{}", key);
-			}
-		}
-		return Ok(());
-	}
-
+	//	get argument target
 	let mut section: &Map<String, Value> = config;
-	let mut fullname: String = "".to_string();
-	for i in start_index..args.len() {
-		let entry = &args[i];
-		fullname = if fullname.is_empty() { args[i].clone() } else { fullname + "." + &args[i] };
-		let i_section = section.get(entry);
-		if i_section.is_none() {
-			error::no_section(&fullname);
-		}
+	let mut target = args.subcommand().unwrap();
+	let mut fullname = String::new();
+	while target.is_some() {
+		let entry = target.unwrap().clone();
+		if !fullname.is_empty() { fullname += "."; }
+		fullname += &entry;
+		let i_section = section.get(&entry);
+		if i_section.is_none() { error::no_section(&entry); }
 		section = i_section.unwrap().as_table().unwrap();
+
+		target = args.subcommand().unwrap();
 	}
-	//let section = i_section.unwrap().as_table().unwrap();
+
+	//	handle list flag
+	if args.contains(["-l", "--list"]) {
+		for (key, _) in section.iter() {
+			println!("{key}");
+		}
+		return Ok(());
+	}
+
+	if target.is_none() { error::no_args(); }
 
 	let prop_path = section.get("path");
-	if dir {
+	//	handle dir flag
+	if args.contains(["-d", "--dir"]) {
 		if prop_path.is_none() {
 			error::no_property(&fullname, "path");
 		}
@@ -102,25 +81,24 @@ fn main() -> Result<(), Box<dyn Error>>{
 		let expanded = if raw_path.starts_with("~") { raw_path.replacen("~", &home_dir, 1) } else { raw_path.to_string() };
 		let file_path = PathBuf::from(expanded.to_string());
 		if file_path.is_dir() {
-			println!("{}", expanded);
-			return Ok(());
+			println!("{expanded}");
 		} else {
 			let i_parent = file_path.parent().unwrap().to_str().unwrap();
 			let parent = if i_parent.starts_with("~") { i_parent.replacen("~", &home_dir, 1) } else { i_parent.to_string() };
-			println!("{}", parent);
+			println!("{parent}");
+		}
 		return Ok(());
 	}
-	}
-	if path {
-		if prop_path.is_none() {
-			error::no_property(&fullname, "path");
-		}
+	//	handle path flag
+	if args.contains(["-p", "--path"]) {
+		if prop_path.is_none() { error::no_property(&fullname, "path"); }
 		let i_file_path = prop_path.unwrap().as_str().unwrap();
 		let file_path = if i_file_path.starts_with("~") { i_file_path.replace("~", &home_dir) } else { i_file_path.to_string() };
-		println!("{}", file_path);
+		println!("{file_path}");
 		return Ok(());
 	}
 
+	//	get properties from config section
 	let prop_command = section.get("command");
 	let raw_command: String;
 	if prop_command.is_none() {
@@ -143,6 +121,7 @@ fn main() -> Result<(), Box<dyn Error>>{
 		shell = shell_default;
 	}
 
+	//	build command and start process
 	let mut process = Command::new(command);
 	process.current_dir(current_dir()?);
 	let mut arguments: Vec<&str> = parts.collect();
@@ -171,14 +150,21 @@ fn main() -> Result<(), Box<dyn Error>>{
 }
 
 fn help_text() {
-	println!("config v{}", env!("CARGO_PKG_VERSION"));
-	println!("Valerie Wolfe <sleeplessval@gmail.com>");
-	println!("A configuration manager written in Rust.\n");
-	println!("USAGE:");
-	println!("\tconfig NAME\n");
-	println!("FLAGS:");
-	println!("\t-h, --help\tPrints this help text");
-	println!("\t-d, --dir\tGets the directory of the config file");
-	println!("\t-l, --list\tLists config sections");
-	println!("\t-p, --path\tGets the path to the config file");
+	println!(
+		"config v{}
+Valerie Wolfe <sleeplessval@gmail.com>
+A configuration manager written in Rust.
+
+usage: config [flags] <name>
+
+args:
+   <name>         The name of the section to configure.
+
+flags:
+    -h, --help    Prints this help text
+    -d, --dir     Gets the directory of the config file
+    -l, --list    Lists config sections
+    -p, --path    Gets the path to the config file",
+		env!("CARGO_PKG_VERSION")
+	);
 }