feat: Enable Docker deployment and CD

Closes #8, partially addresses #6

.dockerignore

@@ -0,0 +1,3 @@
+/assets
+/.sqlx
+/.env.example

.env.example

@@ -1,2 +1,5 @@
 DISCORD_TOKEN=changeme
+
+# Only useful when developing locally. Do not change it when deploying
+# with Docker.
 DATABASE_URL=sqlite:p4bl0t.db

.gitea/workflows/publish-docker.yaml

@@ -0,0 +1,43 @@
+name: Create and publish a Docker image
+
+on:
+  push:
+    branches: ['main', 'feature/docker']
+
+env:
+  REGISTRY: labs.phundrak.com
+  IMAGE_NAME: ${{ gitea.repository }}
+
+jobs:
+  build-and-push-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Install Docker
+        run: curl -fsSL https://get.docker.com | sh
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@65b78e6e13532edd9afa3aa52ac7964289d1a9c1
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ gitea.actor }}
+          password: ${{ secrets.DOCKER_REGISTRY_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@9ec57ed1fcdbf14dcef7dfbe97b2010124a938b7
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@f2a1d5e99d037542a71f64918e516c093c6f3fc4
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

Dockerfile

@@ -0,0 +1,46 @@
+ARG RUST_VERSION=1.73.0
+FROM rust:${RUST_VERSION}-slim-bullseye AS build
+
+RUN --mount=type=cache,target=/usr/local/cargo/registry \
+    cargo install sqlx-cli --no-default-features --features rustls,sqlite && \
+    cp /usr/local/cargo/bin/sqlx /bin/sqlx
+
+ENV DATABASE_URL=sqlite:/var/p4bl0t.db
+
+WORKDIR /app
+RUN --mount=type=bind,source=src,target=src \
+    --mount=type=bind,source=Cargo.toml,target=Cargo.toml \
+    --mount=type=bind,source=Cargo.lock,target=Cargo.lock \
+    --mount=type=bind,source=migrations,target=migrations \
+    --mount=type=cache,target=/app/target/ \
+    --mount=type=cache,target=/usr/local/cargo/registry \
+    <<EOF
+set -e
+sqlx database create
+sqlx migrate run
+cargo build --locked --release
+cargo install --path .
+EOF
+
+
+FROM debian:bullseye-slim AS final
+
+RUN apt-get update && apt-get install -qqy ca-certificates
+ARG UID=10001
+RUN adduser \
+    --disabled-password \
+    --gecos "" \
+    --home "/nonexistent" \
+    --shell "/sbin/nologin" \
+    --no-create-home \
+    --uid "${UID}" \
+    appuser
+USER appuser
+
+ENV DATABASE_URL=sqlite:/var/p4bl0t.db
+ENV DISCORD_TOKEN=changeme
+
+COPY --from=build /usr/local/cargo/bin/p4bl0t /bin
+COPY --chown=appuser --from=build /var/p4bl0t.db /var/p4bl0t.db
+
+CMD [ "p4bl0t" ]

docker-compose.yml

@@ -0,0 +1,8 @@
+version: '3'
+
+services:
+  p4bl0t:
+    env_file: .env
+    build:
+      context: .
+      target: final

src/db/mod.rs

@@ -4,7 +4,7 @@ use std::env;
 
 use poise::serenity_prelude::{ChannelId, GuildId};
 use sqlx::SqlitePool;
-use tracing::error;
+use tracing::{error, info};
 
 pub type Result<T> = ::std::result::Result<T, sqlx::Error>;
 
@@ -24,14 +24,12 @@ impl Database {
     ///
     /// This function will return an error if the Sqlite pool fails to
     /// create.
+    // TODO: Create the database if it doesn’t exist already and run migrations
     pub async fn new() -> Result<Self> {
-        Ok(Self(
+        let db_url = env::var("DATABASE_URL")
-            SqlitePool::connect(
+            .expect("Missing enviroment variable DATABASE_URL");
-                &env::var("DATABASE_URL")
+        info!("Connecting to database located at {db_url}");
-                    .expect("Missing enviroment variable DATABASE_URL"),
+        Ok(Self(SqlitePool::connect(&db_url).await?))
-            )
-            .await?,
-        ))
     }
 
     /// Return from database all channels registered as loggers for a

src/discord/mod.rs

@@ -1,9 +1,10 @@
 mod commands;
+pub mod error;
 mod events;
 pub mod utils;
-pub mod error;
 
 use poise::FrameworkBuilder;
+use tracing::info;
 use utils::serenity;
 
 use commands::logging;
@@ -19,6 +20,9 @@ pub type Result = ::std::result::Result<(), Error>;
 ///
 /// Panics if the environment `DISCORD_TOKEN` is unavailable.
 pub fn make_bot() -> FrameworkBuilder<BotData, Error> {
+    match std::env::var("DISCORD_TOKEN") {
+        Ok(token) => {
+            info!("Launching bot with token {token}");
             poise::Framework::builder()
                 .options(poise::FrameworkOptions {
                     commands: vec![logging()],
@@ -27,7 +31,7 @@ pub fn make_bot() -> FrameworkBuilder<BotData, Error> {
                     },
                     ..Default::default()
                 })
-        .token(std::env::var("DISCORD_TOKEN").expect("missing DISCORD_TOKEN"))
+                .token(token)
                 .intents(serenity::GatewayIntents::non_privileged())
                 .setup(|ctx, _ready, framework| {
                     Box::pin(async move {
@@ -39,4 +43,7 @@ pub fn make_bot() -> FrameworkBuilder<BotData, Error> {
                         Ok(BotData::new().await?)
                     })
                 })
+        }
+        Err(_) => panic!("DISCORD_TOKEN environment variable is missing."),
+    }
 }

src/main.rs

@@ -1,17 +1,23 @@
 #![warn(clippy::style, clippy::pedantic)]
 
-mod utils;
 mod db;
 mod discord;
+mod utils;
 
 use std::error::Error;
 
+use tracing::info;
+
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn Error>> {
-    dotenvy::dotenv()?;
+    println!("Setting logging up");
-    color_eyre::install()?;
     utils::setup_logging();
-
+    info!("Setting up color_eyre");
+    color_eyre::install()?;
+    info!("Reading from dotenv");
+    let _ =
+        dotenvy::dotenv().map_err(|_| info!("No .env file found, skipping"));
+    info!("Launching bot");
     let bot = discord::make_bot();
     bot.run().await?;