create djls-cli and migrate serving LSP to it (#20)

Cargo.toml

@@ -3,11 +3,12 @@ members = ["crates/*"]
 resolver = "2"
 
 [workspace.dependencies]
-djls = { path = "crates/djls" }
 djls-ast = { path = "crates/djls-ast" }
+djls-cli = { path = "crates/djls-cli" }
 djls-django = { path = "crates/djls-django" }
 djls-ipc = { path = "crates/djls-ipc" }
 djls-python = { path = "crates/djls-python" }
+djls-server = { path = "crates/djls-server" }
 djls-worker = { path = "crates/djls-worker" }
 
 anyhow = "1.0.94"

crates/djlc-cli/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "djls-cli"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+djls-django = { workspace = true }
+djls-server = { workspace = true }
+
+anyhow = { workspace = true }
+tokio = { workspace = true }
+
+clap = { version = "4.5.23", features = ["derive"] }
+tower-lsp = { version = "0.20.0", features = ["proposed"] }
+
+[[bin]]
+name = "djls"
+path = "src/main.rs"

crates/djlc-cli/src/main.rs

@@ -0,0 +1,24 @@
+use clap::{Parser, Subcommand};
+
+#[derive(Debug, Parser)]
+struct Cli {
+    #[command(subcommand)]
+    command: Commands,
+}
+
+#[derive(Debug, Subcommand)]
+enum Commands {
+    /// Start the LSP server
+    Serve,
+}
+
+#[tokio::main]
+async fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let cli = Cli::parse();
+
+    match cli.command {
+        Commands::Serve => djls_server::serve().await?,
+    }
+
+    Ok(())
+}

crates/djls-server/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "djls"
+name = "djls-server"
 version = "0.1.0"
 edition = "2021"
 

crates/djls-server/src/lib.rs

@@ -80,8 +80,7 @@ impl LanguageServer for TowerLspBackend {
     }
 }
 
-#[tokio::main]
+pub async fn serve() -> Result<()> {
-async fn main() -> Result<()> {
     let django = DjangoProject::setup()?;
 
     let stdin = tokio::io::stdin();