added nesting flag

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "remux"
-version = "0.1.1"
+version = "0.1.2"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

README.md

@@ -35,5 +35,9 @@ remux d foo
 
 ```
 
-ReMux is built using the [tmux_interface](https://crates.io/crates/tmux_interface) and [pico_args](https://crates.io/crates/pico_args) crates.
+## Libraries
+
+- [pico-args](https://crates.io/crates/pico_args) — argument parsing
+- [tmux_interface](https://crates.io/crates/tmux_interface) — tmux communication
+- [termion](https://crates.io/crates/termion) — ANSI formatting
 

src/command.rs

@@ -10,98 +10,6 @@ use tmux_interface::TmuxCommand;
 use crate::error;
 use crate::util;
 
-pub fn help(pargs: &mut Arguments) {
-	let topic = pargs.subcommand().unwrap();
-
-	match topic.as_deref() {
-		None => {
-			println!("remux v{}", env!("CARGO_PKG_VERSION"));
-			println!("Valerie Wolfe <sleeplessval@gmail.com>");
-			println!("A command wrapper for tmux written in Rust.\n");
-
-			println!("usage: remux <command> [<args>]\n");
-
-			println!("Commands:");
-			println!("   help       Show help text for remux or a specific command");
-			println!("   attach     Attach to an existing tmux session");
-			println!("   detach     Detach clients from a tmux session");
-			println!("   has        Check if a tmux session exists");
-			println!("   list       Pretty-print all tmux sessions");
-			println!("   new        Create a new tmux session");
-
-			println!("\nUse 'remux help <command>' to see detailed help text for each command.");
-		},
-
-
-		Some("a" | "attach")
-		=> {
-			println!("remux attach");
-			println!("Attach to an existing session.\n");
-
-			println!("usage: remux attach [flags] <session> [window]\n");
-
-			println!("args:");
-			println!("   <session>          The session to attach to");
-			println!("   [window]           Optionally focus a window in the given session\n");
-
-			println!("flags:");
-			println!("   -d, --detach       Detach other attached clients from the session");
-			println!("   -r, --readonly     Attach the session as read-only");
-		},
-
-		Some("d" | "detach")
-		=> {
-			println!("remux detach");
-			println!("Detach all clients from a session.\n");
-
-			println!("usage: remux detach <session>\n");
-
-			println!("args:");
-			println!("   <session>      The session name to detach clients from");
-		},
-
-		Some("has")
-		=> {
-			println!("remux has");
-			println!("Check if the target session exists.\n");
-
-			println!("usage: remux has [flags] <session>\n");
-
-			println!("args:");
-			println!("   <session>      The session to check for\n");
-
-			println!("flags:");
-			println!("   -q, --quiet    Display no text; exit code only");
-		},
-
-		Some("l" | "ls" | "list")
-		=> {
-			println!("remux list");
-			println!("Pretty-print all tmux sessions.\n");
-
-			println!("usage: remux list");
-		},
-
-		Some("n" | "new")
-		=> {
-			println!("remux new");
-			println!("Create a new tmux session.\n");
-
-			println!("usage: remux new [flags] <title> [command]\n");
-
-			println!("args:");
-			println!("   <title>                The title of the new session");
-			println!("   [command]              The shell command to run\n");
-
-			println!("flags:");
-			println!("   -t, --target <dir>     Sets the target directory for the new session.");
-		},
-
-								//	not found
-		_	=>	error::no_help(topic.unwrap())
-	}
-}
-
 pub fn attach(pargs: &mut Arguments) {
 	util::prevent_nest();
 

src/error.rs

@@ -30,9 +30,15 @@ pub fn missing_target() {
 	exit(4);
 }
 
-///	user declined nesting dialog
+///	non-terminal environment prevention; code 5
-pub fn nest_declined() {
+pub fn not_terminal() {
-	println!("remux: session nesting declined by user");
+	println!("remux: not running from a terminal");
 	exit(5);
 }
 
+///	tried to nest while not in a session; code 6
+pub fn not_nesting() {
+	println!("remux: cannot use nesting flag outside a TMUX session");
+	exit(6);
+}
+

src/help.rs

@@ -0,0 +1,98 @@
+use std::process::exit;
+
+use pico_args::Arguments;
+
+use crate::error;
+
+pub fn help(pargs: &mut Arguments) {
+	let topic = pargs.subcommand().unwrap();
+
+	match topic.as_deref() {
+		None => {
+			println!("remux v{}", env!("CARGO_PKG_VERSION"));
+			println!("Valerie Wolfe <sleeplessval@gmail.com>");
+			println!("A command wrapper for tmux written in Rust.\n");
+
+			println!("usage: remux <command> [<args>]\n");
+
+			println!("Commands:");
+			println!("   help       Show help text for remux or a specific command");
+			println!("   attach     Attach to an existing tmux session");
+			println!("   detach     Detach clients from a tmux session");
+			println!("   has        Check if a tmux session exists");
+			println!("   list       Pretty-print all tmux sessions");
+			println!("   new        Create a new tmux session");
+
+			println!("\nUse 'remux help <command>' to see detailed help text for each command.");
+		},
+
+
+		Some("a" | "attach")
+		=> {
+			println!("remux attach");
+			println!("Attach to an existing session.\n");
+
+			println!("usage: remux attach [flags] <session> [window]\n");
+
+			println!("args:");
+			println!("   <session>          The session to attach to");
+			println!("   [window]           Optionally focus a window in the given session\n");
+
+			println!("flags:");
+			println!("   -d, --detach       Detach other attached clients from the session");
+			println!("   -r, --readonly     Attach the session as read-only");
+		},
+
+		Some("d" | "detach")
+		=> {
+			println!("remux detach");
+			println!("Detach all clients from a session.\n");
+
+			println!("usage: remux detach <session>\n");
+
+			println!("args:");
+			println!("   <session>      The session name to detach clients from");
+		},
+
+		Some("has")
+		=> {
+			println!("remux has");
+			println!("Check if the target session exists.\n");
+
+			println!("usage: remux has [flags] <session>\n");
+
+			println!("args:");
+			println!("   <session>      The session to check for\n");
+
+			println!("flags:");
+			println!("   -q, --quiet    Display no text; exit code only");
+		},
+
+		Some("l" | "ls" | "list")
+		=> {
+			println!("remux list");
+			println!("Pretty-print all tmux sessions.\n");
+
+			println!("usage: remux list");
+		},
+
+		Some("n" | "new")
+		=> {
+			println!("remux new");
+			println!("Create a new tmux session.\n");
+
+			println!("usage: remux new [flags] <title> [command]\n");
+
+			println!("args:");
+			println!("   <title>                The title of the new session");
+			println!("   [command]              The shell command to run\n");
+
+			println!("flags:");
+			println!("   -t, --target <dir>     Sets the target directory for the new session.");
+		},
+
+								//	not found
+		_	=>	error::no_help(topic.unwrap())
+	}
+}
+

src/main.rs

@@ -1,23 +1,43 @@
+use std::{
+	env::{ set_var, var },
+	io::{ stdout, IsTerminal }
+};
 
 use pico_args::Arguments;
 
 mod command;
 mod error;
+mod help;
 mod util;
 
+use help::help;
+
 fn main() {
+	//	collect args
 	let mut args = Arguments::from_env();
 
+	//	consume flags
 	if args.contains(["-h", "--help"]) {
-		command::help(&mut args);
+		help(&mut args);
 		return;
 	}
+	let nesting = args.contains(["-n", "--nest"]);
+	let tmux_var = var("TMUX").ok();
+	if nesting {
+		if tmux_var.is_none() {
+			error::not_nesting();
+		}
+		set_var("TMUX", "");
+	}
+
+	if !stdout().is_terminal() { error::not_terminal(); }
 
 	let subcommand = args.subcommand().unwrap();
 
+	//	invoke subcommand function
 	match subcommand.as_deref() {
 		Some("h" | "help")
-			=>	command::help(&mut args),
+			=>	help(&mut args),
 
 		Some("a" | "attach")
 			=>	command::attach(&mut args),
@@ -38,5 +58,9 @@ fn main() {
 		_
 			=>	error::no_subcommand(subcommand.unwrap())
 	}
+
+	if nesting {
+		set_var("TMUX", tmux_var.unwrap());
+	}
 }
 

src/util.rs

@@ -1,10 +1,5 @@
 use std::{
-	env::{ set_var, var },
+	env::var,
-	io::{
-		self,
-		
-		Read, Write
-	},
 	process::exit
 };
 
@@ -13,8 +8,6 @@ use tmux_interface::{
 	variables::session::session::SESSION_ALL
 };
 
-use crate::error;
-
 ///	return a Vec of all sessions or None
 pub fn get_sessions() -> Option<Vec<Session>> {
 	let i_sessions = Sessions::get(SESSION_ALL);
@@ -29,18 +22,8 @@ pub fn get_sessions() -> Option<Vec<Session>> {
 pub fn prevent_nest() {
 	let tmux = var("TMUX").ok();
 	if tmux.is_some() && tmux.unwrap() != "" {
-		//	ask the user if they want to nest (default: no)
+		println!("Sessions should be nested with care; unset TMUX or use the '-n' flag to allow.");
-		print!("Are you sure you want to nest sessions? (y/N) ");
+		exit(1);
-		let _ = io::stdout().flush();
-
-		let mut input = [0];
-		let _ = io::stdin().read(&mut input);
-		match input[0] as char {
-			'y' | 'Y'
-				=> {},
-			_ => error::nest_declined()
-		}
-		set_var("TMUX", "");
 	}
 }