Add (semi) live reloading for debug server

Cargo.lock

@@ -259,6 +259,7 @@ dependencies = [
  "dotenvy",
  "feed-rs",
  "maud",
+ "notify",
  "reqwest",
  "serde",
  "serde_with",
@@ -267,6 +268,7 @@ dependencies = [
  "tokio",
  "tower",
  "tower-http",
+ "tower-livereload",
  "tracing",
  "tracing-subscriber",
  "validator",
@@ -287,6 +289,16 @@ version = "2.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9cace84e55f07e7301bae1c519df89cdad8cc3cd868413d3fdbdeca9ff3db484"
 
+[[package]]
+name = "crossbeam-channel"
+version = "0.5.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a33c2bf77f2df06183c3aa30d1e96c0695a313d4f9c453cc3762a6db39f99200"
+dependencies = [
+ "cfg-if",
+ "crossbeam-utils",
+]
+
 [[package]]
 name = "crossbeam-queue"
 version = "0.3.8"
@@ -501,6 +513,18 @@ dependencies = [
  "uuid",
 ]
 
+[[package]]
+name = "filetime"
+version = "0.2.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5cbc844cecaee9d4443931972e1289c8ff485cb4cc2767cb03ca139ed6885153"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "redox_syscall 0.2.16",
+ "windows-sys 0.48.0",
+]
+
 [[package]]
 name = "fnv"
 version = "1.0.7"
@@ -531,6 +555,15 @@ dependencies = [
  "percent-encoding",
 ]
 
+[[package]]
+name = "fsevent-sys"
+version = "4.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "76ee7a02da4d231650c7cea31349b889be2f45ddb3ef3032d2ec8185f6313fd2"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "futures-channel"
 version = "0.3.28"
@@ -834,6 +867,26 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "inotify"
+version = "0.9.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8069d3ec154eb856955c1c0fbffefbf5f3c40a104ec912d4797314c1801abff"
+dependencies = [
+ "bitflags",
+ "inotify-sys",
+ "libc",
+]
+
+[[package]]
+name = "inotify-sys"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e05c02b5e89bff3b946cedeca278abc628fe811e604f027c45a8aa3cf793d0eb"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "instant"
 version = "0.1.12"
@@ -884,6 +937,26 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "kqueue"
+version = "1.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2c8fc60ba15bf51257aa9807a48a61013db043fcf3a78cb0d916e8e396dcad98"
+dependencies = [
+ "kqueue-sys",
+ "libc",
+]
+
+[[package]]
+name = "kqueue-sys"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8367585489f01bc55dd27404dcf56b95e6da061a256a666ab23be9ba96a2e587"
+dependencies = [
+ "bitflags",
+ "libc",
+]
+
 [[package]]
 name = "lazy_static"
 version = "1.4.0"
@@ -1042,6 +1115,24 @@ dependencies = [
  "minimal-lexical",
 ]
 
+[[package]]
+name = "notify"
+version = "6.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4d9ba6c734de18ca27c8cef5cd7058aa4ac9f63596131e4c7e41e579319032a2"
+dependencies = [
+ "bitflags",
+ "crossbeam-channel",
+ "filetime",
+ "fsevent-sys",
+ "inotify",
+ "kqueue",
+ "libc",
+ "mio",
+ "walkdir",
+ "windows-sys 0.45.0",
+]
+
 [[package]]
 name = "nu-ansi-term"
 version = "0.46.0"
@@ -1447,6 +1538,15 @@ version = "1.0.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f91339c0467de62360649f8d3e185ca8de4224ff281f66000de5eb2a77a79041"
 
+[[package]]
+name = "same-file"
+version = "1.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "93fc1dc3aaa9bfed95e02e6eadabb4baf7e3078b0bd1b4d7b6b0b68378900502"
+dependencies = [
+ "winapi-util",
+]
+
 [[package]]
 name = "schannel"
 version = "0.1.21"
@@ -2006,6 +2106,20 @@ version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c20c8dbed6283a09604c3e69b4b7eeb54e298b8a600d4d5ecb5ad39de609f1d0"
 
+[[package]]
+name = "tower-livereload"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8b316f4712049eb6c939efd3a7e1f7fefd3cbebd00794e82e7774855c8858ea"
+dependencies = [
+ "bytes",
+ "http",
+ "http-body",
+ "pin-project-lite",
+ "tokio",
+ "tower",
+]
+
 [[package]]
 name = "tower-service"
 version = "0.3.2"
@@ -2206,6 +2320,16 @@ version = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
 
+[[package]]
+name = "walkdir"
+version = "2.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "36df944cda56c7d8d8b7496af378e6b16de9284591917d307c9b4d313c44e698"
+dependencies = [
+ "same-file",
+ "winapi-util",
+]
+
 [[package]]
 name = "want"
 version = "0.3.0"

Cargo.toml

@@ -18,6 +18,7 @@ chrono = { version = "0.4", features = ["serde"] }
 dotenvy = "0.15"
 feed-rs = "1.3"
 maud = { version = "0.25", features = ["axum"] }
+notify = "6"
 reqwest = { version = "0.11", features = ["json"] }
 serde = { version = "1", features = ["derive"] }
 serde_with = "3"
@@ -31,6 +32,7 @@ sqlx = { version = "0.6", features = [
 thiserror = "1"
 tokio = { version = "1", features = ["full"] }
 tower = "0.4"
+tower-livereload = "0.7"
 tower-http = { version = "0.4", features = ["trace"] }
 tracing = "0.1"
 tracing-subscriber = { version = "0.3", features = ["env-filter"] }

src/main.rs

@@ -3,9 +3,11 @@ use axum::{
     Router,
 };
 use dotenvy::dotenv;
+use notify::Watcher;
 use sqlx::postgres::PgPoolOptions;
-use std::env;
+use std::{env, path::Path};
 use tower::ServiceBuilder;
+use tower_livereload::LiveReloadLayer;
 use tower_http::trace::TraceLayer;
 use tracing::debug;
 
@@ -35,6 +37,12 @@ async fn main() -> anyhow::Result<()> {
         .with_state(pool)
         .layer(ServiceBuilder::new().layer(TraceLayer::new_for_http()));
 
+    let livereload = LiveReloadLayer::new();
+    let reloader = livereload.reloader();
+    let mut watcher = notify::recommended_watcher(move |_| reloader.reload())?;
+    watcher.watch(Path::new("target/debug/crawlnicle"), notify::RecursiveMode::Recursive)?;
+    let app = app.layer(livereload);
+
     let addr = (env::var("HOST")? + ":" + &env::var("PORT")?).parse()?;
     debug!("listening on {}", addr);
     axum::Server::bind(&addr)