feat(main): implement readline functionality with rustylinez

Including background log output

Cargo.lock

@@ -302,6 +302,12 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "bitflags"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8dead7461c1127cf637931a1e50934eb6eee8bff2f74433ac7909e9afcee04a3"
+
 [[package]]
 name = "bitflags"
 version = "1.3.2"
@@ -1198,6 +1204,7 @@ dependencies = [
  "parse_datetime",
  "regex",
  "rustyline",
+ "rustylinez",
  "tokio",
  "xdg",
 ]
@@ -1217,6 +1224,16 @@ dependencies = [
  "smallvec",
 ]
 
+[[package]]
+name = "nix"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bfb3ddedaa14746434a02041940495bf11325c22f6d36125d3bdd56090d50a79"
+dependencies = [
+ "bitflags 0.4.0",
+ "libc",
+]
+
 [[package]]
 name = "nix"
 version = "0.26.4"
@@ -1814,6 +1831,16 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "rustylinez"
+version = "0.2.2"
+source = "git+https://github.com/xeruf/rustylinez?rev=c2cd6178#c2cd617830fb15bd5c95c6f17809e91b95660889"
+dependencies = [
+ "libc",
+ "nix 0.5.1",
+ "unicode-width",
+]
+
 [[package]]
 name = "ryu"
 version = "1.0.17"

Cargo.toml

@@ -24,6 +24,7 @@ interim = { version = "0.1", features = ["chrono"] }
 nostr-sdk = "0.34" # { git = "https://github.com/rust-nostr/nostr" }
 tokio = { version = "1.37", features = ["rt", "rt-multi-thread", "macros"] }
 regex = "1.10.5"
+rustylinez = { git = "https://github.com/xeruf/rustylinez", rev = "c2cd6178" }
 
 [dev-dependencies]
 chrono-english = "0.1"

src/main.rs

@@ -3,7 +3,7 @@ use std::collections::{HashMap, VecDeque};
 use std::env::{args, var};
 use std::fs;
 use std::fs::File;
-use std::io::{BufRead, BufReader, stdin, stdout, Write};
+use std::io::{BufRead, BufReader};
 use std::iter::once;
 use std::ops::Sub;
 use std::path::PathBuf;
@@ -11,12 +11,14 @@ use std::str::FromStr;
 use std::time::Duration;
 
 use colored::Colorize;
-use env_logger::Builder;
+use env_logger::{Builder, Target, WriteStyle};
 use itertools::Itertools;
 use log::{debug, error, info, LevelFilter, trace, warn};
 use nostr_sdk::prelude::*;
 use nostr_sdk::TagStandard::Hashtag;
 use regex::Regex;
+use rustylinez::Editor;
+use rustylinez::error::ReadlineError;
 use tokio::sync::mpsc;
 use tokio::sync::mpsc::Sender;
 use tokio::time::error::Elapsed;
@@ -138,20 +140,22 @@ pub(crate) enum MostrMessage {
 
 #[tokio::main]
 async fn main() {
+    let mut rl = Editor::new();
+
     let mut args = args().skip(1).peekable();
     if args.peek().is_some_and(|arg| arg == "--debug") {
         args.next();
-        Builder::new()
-            .filter(None, LevelFilter::Debug)
+        let mut builder = Builder::new();
+        builder.filter(None, LevelFilter::Debug)
             //.filter(Some("mostr"), LevelFilter::Trace)
-            .parse_default_env()
-            .init();
+            .parse_default_env();
+        builder
     } else {
-        colog::default_builder()
-            .filter(Some("nostr-relay-pool"), LevelFilter::Error)
+        let mut builder = colog::default_builder();
+        builder.filter(Some("nostr-relay-pool"), LevelFilter::Error);
             //.filter(Some("nostr-relay-pool::relay::internal"), LevelFilter::Off)
-            .init();
-    }
+        builder
+    }.write_style(WriteStyle::Always).target(Target::Pipe(Box::new(rl.get_printer()))).init();
 
     let config_dir = or_warn!(BaseDirectories::new(), "Could not determine config directory")
         .and_then(|d| or_warn!(d.create_config_directory("mostr"), "Could not create config directory"))
@@ -292,21 +296,19 @@ async fn main() {
         }
     }
 
-    let mut lines = stdin().lines();
     loop {
         trace!("All Root Tasks:\n{}", relays.iter().map(|(url, tasks)|
             format!("{}: [{}]", url, tasks.children_of(None).map(|id| tasks.get_task_title(id)).join("; "))).join("\n"));
         println!();
         let tasks = selected_relay.as_ref().and_then(|url| relays.get(url)).unwrap_or(&local_tasks);
-        print!(
+        let prompt = format!(
             "{} {}{}) ",
             selected_relay.as_ref().map_or("TEMP".to_string(), |url| url.to_string()).bright_black(),
             tasks.get_task_path(tasks.get_position()).bold(),
             tasks.get_prompt_suffix().italic(),
         );
-        stdout().flush().unwrap();
-        match lines.next() {
-            Some(Ok(input)) => {
+        match rl.readline(&prompt) {
+            Ok(input) => {
                 let mut count = 0;
                 while let Ok(notification) = notifications.try_recv() {
                     if let RelayPoolNotification::Event {
@@ -629,8 +631,9 @@ async fn main() {
                 }
                 or_warn!(tasks.print_tasks());
             }
-            Some(Err(e)) => warn!("{}", e),
-            None => break,
+            Err(ReadlineError::Eof) => break,
+            Err(ReadlineError::Interrupted) => break, // TODO exit if prompt was empty, or clear
+            Err(e) => warn!("{}", e),
         }
     }
     println!();