Add Dockerfile to create images

small improvements on common functions

.dockerignore

@@ -0,0 +1,2 @@
+Dockerfile
+target/*

.editorconfig

@@ -1,15 +0,0 @@
-root = true
-
-[*]
-end_of_line = lf
-insert_final_newline = true
-charset = utf-8
-trim_trailing_whitespace = true
-
-[*.nix]
-ident_style = space
-ident_size = 2
-
-[*.rs]
-ident_style = space
-ident_size = 4

.gitattributes

@@ -1 +0,0 @@
-Cargo.nix linguist-generated

CHANGELOG.md

@@ -1,3 +1,7 @@
+# 1.0.1
+
+Finish NixOS module
+
 # 1.0.0
 
 Initial release. Slash commands are available for most basic functionality.

Cargo.lock

@@ -458,7 +458,7 @@ dependencies = [
 
 [[package]]
 name = "disconic"
-version = "1.0.0"
+version = "1.1.0"
 dependencies = [
  "anyhow",
  "clap",

Cargo.toml

@@ -1,11 +1,12 @@
 [package]
 name = "disconic"
 description = "Discord bot for interacting with subsonic music libraries"
-version = "1.0.0"
+version = "1.1.0"
 authors = [ "Gabriel Fontes <eu@misterio.me>" ]
-edition = "2018"
+edition = "2021"
 homepage = "https://misterio.me"
 license = "AGPL-3.0-or-later"
+rust-version = "1.70.0"
 
 
 [patch.crates-io.sunk]

Dockerfile

@@ -0,0 +1,13 @@
+FROM rust:1.74-bookworm
+
+COPY . /opt/app
+
+WORKDIR /opt/app
+
+RUN apt update && apt install -y cmake
+
+RUN cargo build --release
+
+ENTRYPOINT ["/opt/app/target/release/disconic"]
+
+CMD ["--help"]

README.md

@@ -10,7 +10,7 @@ I use `sunk` to interact with subsonic, and `serenity`/`poise` to interact with
 
 You need `rustc` >= 1.70 to compile this crate. Use `rustup` to get it.
 
-The only crate with non-rust dependencies is `audiopus_sys`, this means you need `libopus` installed to run this. If building, you'll also need `cmake` and `pkg-config`. Consult your distro's documentation on how to get these.
+The only crate with non-rust dependencies is `audiopus_sys`, this means you need `libopus` installed to run this. If building, you'll also need `pkg-config`. Consult your distro's documentation on how to get these.
 
 You can quickly get everything you need with nix:
 
@@ -46,11 +46,11 @@ With nix, you don't even need to clone the repo. Simply replace `.` with `github
 
 ## Usage
 
-Start by creating a discord app, getting its bot token, and inviting it to your server. Also get your guild (server) ID. These steps are already documented elsewhere, so will not be covered here.
+Start by creating a discord app and getting its bot token. Also get your guild (server) ID. These steps are already documented elsewhere, so will not be covered here.
 
-You can configure the application through CLI arguments (very convenient) or environment variables (better for deployments, dotenv is also supported). Use `--help` to see what the arguments or environment variables are.
+You can configure the application through CLI arguments or environment variables. Use `--help` to see what the arguments and environment variables are.
 
-Simply run the binary and everything will be setup for you. The bot will automatically register its commands on your server (if guild_id is set). If you don't see the commands, try sending a message mentioning the bot and `register` (all commands can be ran like that, too).
+Simply run the binary and everything will be setup for you. If your bot is not a member of the guild, disconic will error out and print the invitation URL. The bot will also automatically register its slash commands on your server whenever it starts.
 
 ## Usage
 

flake.nix

@@ -17,13 +17,11 @@
     let
       forAllSystems = nixpkgs.lib.genAttrs [ "x86_64-linux" "aarch64-linux" ];
       forAllPkgs = f: forAllSystems (sys: f pkgsFor.${sys});
-      pkgsFor = forAllSystems (system: import nixpkgs {
-        inherit system;
-        overlays = [ rust-overlay.overlays.default ];
-      });
+      pkgsFor = nixpkgs.legacyPackages;
+
       mkPackage = pkgs: pkgs.callPackage ./default.nix {
         rustPlatform = pkgs.makeRustPlatform rec {
-          rustc = pkgs.rust-bin.stable.latest.default;
+          rustc = rust-overlay.packages.${pkgs.system}.rust;
           cargo = rustc;
         };
       };

module.nix

@@ -14,22 +14,18 @@ in {
         The package implementing disconic
       '';
     };
-    subsonicUrl = mkOption {
+    user = mkOption {
       type = types.str;
-      description = "Subsonic library base API URL";
+      default = "yrmos";
+      description = "Service user that will run the daemon.";
     };
-    subsonicUser = mkOption {
-      type = types.str;
-      description = "Subsonic user login";
-    };
-    subsonicPasswordFile = mkOption {
+
+    environmentFile = mkOption {
       type = types.path;
-      description = "File path containing subsonic user password";
-    };
-    discordTokenFile = mkOption {
-      type = types.path;
-      description = "File path containing discord token";
+      default = null;
+      description = "File path containing environment variables.";
     };
+
     extraArgs = mkOption {
       type = types.listOf types.str;
       default = [ ];
@@ -41,13 +37,21 @@ in {
     systemd.services.disconic = {
       description = "Disconic, a Discord Subsonic Bot";
       wantedBy = [ "multi-user.target" ];
-      serviceConfig.ExecStart = lib.escapeShellArgs ([
-        (lib.getExe cfg.package)
-        "--subsonic-url=${cfg.subsonicUrl}"
-        "--subsonic-user=${cfg.subsonicUser}"
-        "--subsonic-password=$(cat ${cfg.subsonicPasswordFile})"
-        "--discord-token=$(cat ${cfg.discordTokenFile}"
-      ] ++ cfg.extraArgs);
+      serviceConfig = {
+        Restart = "always";
+        User = cfg.user;
+        EnvironmentFile = lib.mkIf (cfg.environmentFile != null) cfg.environmentFile;
+      };
+      script = (lib.getExe cfg.package) + (lib.escapeShellArg cfg.extraArgs);
+    };
+
+    users = {
+      users.${cfg.user} = {
+        description = "disconic service user";
+        isSystemUser = true;
+        group = cfg.user;
+      };
+      groups.${cfg.user} = { };
     };
   };
 }

src/config.rs

@@ -15,7 +15,7 @@ pub struct Config {
     #[clap(long, env = "DISCONIC_SUBSONIC_PASSWORD")]
     subsonic_password: String,
     #[clap(long, env = "DISCONIC_DISCORD_GUILD")]
-    discord_guild: Option<u64>,
+    discord_guild: u64,
     #[clap(long, env = "DISCONIC_DISCORD_TOKEN")]
     discord_token: String,
     #[clap(long, env = "DISCONIC_LOG_LEVEL", default_value = "warn")]

src/discord/client.rs

@@ -1,7 +1,12 @@
 use crate::discord::{commands, Data};
-use anyhow::Result;
-use poise::samples::create_application_commands;
-use serenity::{all::GuildId, client::Client as DiscordClient, prelude::GatewayIntents};
+use anyhow::{Error, Result};
+use poise::{samples::create_application_commands, Framework};
+use serenity::{
+    all::{GuildId, Ready},
+    builder::CreateCommand,
+    client::Client as DiscordClient,
+    prelude::{Context, GatewayIntents},
+};
 use songbird::SerenityInit;
 use sunk::Client as SubsonicClient;
 
@@ -36,14 +41,48 @@ async fn on_error(error: poise::FrameworkError<'_, Data, anyhow::Error>) {
     }
 }
 
+async fn on_startup(
+    guild: GuildId,
+    data: Data,
+    create_commands: Vec<CreateCommand>,
+    ctx: &Context,
+    ready: &Ready,
+    framework: &Framework<Data, Error>,
+) -> Result<Data> {
+    let is_on_guild = (&ready.guilds).iter().any(|x| x.id == guild);
+
+    let bot_id = framework.bot_id().await;
+    let permissions = "311388293184";
+    let scope = "bot%20applications.commands";
+
+    if !is_on_guild {
+        let invite_link = format!(
+            "https://discord.com/oauth2/authorize?client_id={}&permissions={}&scope={}",
+            bot_id, permissions, scope
+        );
+        log::error!("The bot is not your on your guild.");
+        log::error!("Invite it with:\n {}", invite_link);
+        framework.shard_manager().lock().await.shutdown_all().await;
+        std::process::exit(1);
+    }
+
+    guild
+        .set_commands(&ctx.http, create_commands)
+        .await
+        .expect("Failed to register command");
+    log::info!("Registered commands");
+    Ok(data)
+}
+
 pub async fn create_client(
     token: &str,
-    guild_id: Option<u64>,
+    guild_id: u64,
     subsonic_client: SubsonicClient,
 ) -> Result<DiscordClient> {
     let intents = GatewayIntents::non_privileged() | GatewayIntents::MESSAGE_CONTENT;
     let commands = commands::commands();
     let data = Data { subsonic_client };
+    let guild = GuildId::new(guild_id);
 
     let create_commands = create_application_commands(&commands);
     let options = poise::FrameworkOptions {
@@ -51,20 +90,15 @@ pub async fn create_client(
         on_error: |e| Box::pin(on_error(e)),
         ..Default::default()
     };
-    let framework = poise::Framework::new(options, move |ctx, _ready, _framework| {
-        Box::pin(async move {
-            if let Some(id) = guild_id {
-                let guild = GuildId::new(id);
-                guild
-                    .set_commands(&ctx.http, create_commands)
-                    .await
-                    .expect("Failed to register command");
-            } else {
-                log::warn!("Guild ID not configured. You'll have to run 'register' to register the slash commands.")
-            }
-            log::info!("Registered commands");
-            Ok(data)
-        })
+    let framework = poise::Framework::new(options, move |ctx, ready, framework| {
+        Box::pin(on_startup(
+            guild,
+            data,
+            create_commands,
+            ctx,
+            ready,
+            framework,
+        ))
     });
 
     let client = DiscordClient::builder(token, intents)

src/discord/common.rs

@@ -1,5 +1,8 @@
-use anyhow::{anyhow, Result};
-use serenity::all::{ChannelId, Guild};
+use anyhow::{anyhow, Context as ErrContext, Result};
+use serenity::{
+    all::{ChannelId, Guild},
+    prelude::TypeMapKey,
+};
 use songbird::{
     input::HttpRequest,
     tracks::{Track, TrackHandle},
@@ -10,7 +13,10 @@ use tokio::sync::Mutex;
 
 use std::sync::Arc;
 
-use crate::handles::SubsonicSongHandle;
+pub struct SongHandle;
+impl TypeMapKey for SongHandle {
+    type Value = Song;
+}
 
 pub struct Data {
     pub subsonic_client: sunk::Client,
@@ -24,15 +30,15 @@ pub async fn queue_song(ctx: Context<'_>, song: &Song, client: &sunk::Client) ->
     let track = load_song(song, client).await?;
     let track_handle = handler.enqueue(track).await;
     let mut type_map = track_handle.typemap().write().await;
-    type_map.insert::<SubsonicSongHandle>(song.clone());
+    type_map.insert::<SongHandle>(song.clone());
 
     Ok(())
 }
 
 pub fn get_guild(ctx: Context<'_>) -> Guild {
-    let guild = ctx.guild().expect("No guild!").clone();
-    log::info!("Got guild: {guild:?}");
-    guild
+    ctx.guild()
+        .expect("Invalid (or no) guild configured!")
+        .to_owned()
 }
 
 pub fn get_channel(ctx: Context<'_>) -> Result<ChannelId> {
@@ -41,52 +47,45 @@ pub fn get_channel(ctx: Context<'_>) -> Result<ChannelId> {
         .voice_states
         .get(&ctx.author().id)
         .ok_or_else(|| anyhow!("You must be in a voice channel to use this command"))?;
-    let channel = voice_state
+    voice_state
         .channel_id
-        .ok_or_else(|| anyhow!("You must be in a voice channel to use this command"))?;
-
-    Ok(channel)
+        .ok_or_else(|| anyhow!("You must be in a voice channel to use this command"))
 }
 
 pub async fn get_call(ctx: Context<'_>) -> Result<Arc<Mutex<songbird::Call>>> {
     let manager = get_manager(ctx).await?;
     let guild = get_guild(ctx);
-    let call = manager.get(guild.id);
-
-    if let Some(c) = call {
-        Ok(c)
-    } else {
-        let channel = get_channel(ctx)?;
-        log::warn!("Not in a voice channel, trying to join {channel}");
-        let _handler = manager.join(guild.id, channel).await;
-        manager
-            .get(guild.id)
-            .ok_or_else(|| anyhow!("Not in a voice channel, try running 'join'"))
+    match manager.get(guild.id) {
+        Some(c) => Ok(c),
+        None => {
+            let channel = get_channel(ctx)?;
+            log::warn!("Not in a voice channel, trying to join {channel}");
+            manager
+                .join(guild.id, channel)
+                .await
+                .context("Couldn't join voice channel. Try running 'join' manually.")
+        }
     }
 }
 
 pub async fn get_song(track: &TrackHandle) -> Result<Song> {
-    let song = track
+    track
         .typemap()
         .read()
         .await
-        .get::<SubsonicSongHandle>()
+        .get::<SongHandle>()
         .map(ToOwned::to_owned)
-        .ok_or_else(|| anyhow!("Sound information not found"))?;
-    Ok(song)
+        .ok_or_else(|| anyhow!("Sound information not found"))
 }
 
 pub async fn get_manager(ctx: Context<'_>) -> Result<Arc<Songbird>> {
-    let manager = songbird::get(ctx.discord())
+    songbird::get(ctx.discord())
         .await
-        .ok_or_else(|| anyhow!("Couldn't start manager"))?;
-    log::info!("Got manager: {manager:?}");
-    Ok(manager)
+        .ok_or_else(|| anyhow!("Couldn't start manager"))
 }
 
 pub async fn load_song(song: &Song, client: &sunk::Client) -> Result<Track> {
-    log::info!("Loading song {song:?}");
     let url = song.stream_url(client)?;
-    let track: Track = HttpRequest::new(client.reqclient.clone(), url).into();
+    let track = HttpRequest::new(client.reqclient.clone(), url).into();
     Ok(track)
 }

src/discord/handler.rs

@@ -1,14 +0,0 @@
-use serenity::{
-    all::Ready,
-    async_trait,
-    prelude::{Context, EventHandler},
-};
-
-pub struct Handler;
-
-#[async_trait]
-impl EventHandler for Handler {
-    async fn ready(&self, _: Context, ready: Ready) {
-        log::info!("{} is connected!", ready.user.name);
-    }
-}

src/discord/mod.rs

@@ -1,8 +1,6 @@
 pub mod client;
 pub mod commands;
 pub mod common;
-pub mod handler;
 
 pub use client::create_client;
 pub use common::{Context, Data};
-pub use handler::Handler;

src/handles.rs

@@ -1,12 +0,0 @@
-use serenity::prelude::TypeMapKey;
-use sunk::{song::Song as SubsonicSong, Client as SubsonicClient};
-
-pub struct SubsonicClientHandle;
-impl TypeMapKey for SubsonicClientHandle {
-    type Value = SubsonicClient;
-}
-
-pub struct SubsonicSongHandle;
-impl TypeMapKey for SubsonicSongHandle {
-    type Value = SubsonicSong;
-}

src/lib.rs

@@ -1,3 +1,2 @@
 pub mod config;
 pub mod discord;
-pub mod handles;