Add command for shell completions

Cargo.lock

@@ -389,6 +389,15 @@ dependencies = [
  "strsim",
 ]
 
+[[package]]
+name = "clap_complete"
+version = "4.4.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a51919c5608a32e34ea1d6be321ad070065e17613e168c5b6977024290f2630b"
+dependencies = [
+ "clap",
+]
+
 [[package]]
 name = "clap_derive"
 version = "4.4.7"
@@ -2054,6 +2063,7 @@ dependencies = [
  "anyhow",
  "bytes",
  "clap",
+ "clap_complete",
  "console-subscriber",
  "futures",
  "librqbit",

crates/rqbit/Cargo.toml

@@ -29,6 +29,7 @@ tokio = {version = "1", features = ["macros", "rt-multi-thread"]}
 console-subscriber = {version = "0.2", optional = true}
 anyhow = "1"
 clap = {version = "4", features = ["derive", "deprecated"]}
+clap_complete = "4.4.5"
 tracing = "0.1"
 tracing-subscriber = {version = "0.3", features = ["env-filter"]}
 regex = "1"

crates/rqbit/src/main.rs

@@ -1,7 +1,8 @@
-use std::{net::SocketAddr, path::PathBuf, sync::Arc, time::Duration};
+use std::{io, net::SocketAddr, path::PathBuf, sync::Arc, time::Duration};
 
 use anyhow::Context;
-use clap::{Parser, ValueEnum};
+use clap::{CommandFactory, Parser, ValueEnum};
+use clap_complete::Shell;
 use librqbit::{
     api::ApiAddTorrentResponse,
     http_api::{HttpApi, HttpApiOptions},
@@ -172,6 +173,12 @@ impl From<&str> for InitialPeers {
     }
 }
 
+#[derive(Parser)]
+struct CompletionsOpts {
+    /// The shell to generate completions for
+    shell: Shell,
+}
+
 // server start
 // download [--connect-to-existing] --output-folder(required) [file1] [file2]
 
@@ -179,6 +186,7 @@ impl From<&str> for InitialPeers {
 enum SubCommand {
     Server(ServerOpts),
     Download(DownloadOpts),
+    Completions(CompletionsOpts),
 }
 
 fn _start_deadlock_detector_thread() {
@@ -519,5 +527,14 @@ async fn async_main(opts: Opts) -> anyhow::Result<()> {
                 }
             }
         }
+        SubCommand::Completions(completions_opts) => {
+            clap_complete::generate(
+                completions_opts.shell,
+                &mut Opts::command(),
+                "rqbit",
+                &mut io::stdout(),
+            );
+            Ok(())
+        }
     }
 }