Migrate build to Mill

.github/workflows/build.yml

@@ -1,49 +1,28 @@
 name: build
-
 on: [ push ]
-
 jobs:
-
   server:
     runs-on: ubuntu-latest
     steps:
-
-      - uses: actions/checkout@v1
-
-      - uses: actions/cache@v4
-        with:
-          path: ~/.cache/coursier/v1
-          key: ${{ runner.os }}-coursier-${{ hashFiles('**/build.sbt') }}
-
-      - name: Set up java
-        uses: actions/setup-java@v4
-        with:
-          distribution: 'temurin'
-          java-version: 21
-
-      - name: Set up sbt
-        uses: sbt/setup-sbt@v1
-
-      - name: Build
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: sbt server/stage
-
+      - uses: actions/checkout@v3
+      - name: Compile
+        run: ./mill __.compile
+      - name: Build distributable
+        run: ./mill server.assembly
       - name: Set up Docker Buildx
         id: buildx
         uses: docker/setup-buildx-action@master
-
       - name: Login to GitHub Container Registry
         uses: docker/login-action@v1
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
-
       - name: Push images
         uses: docker/build-push-action@v2
         with:
           context: .
+          file: Dockerfile
           platforms: linux/amd64,linux/arm64
           push: true
           tags: ghcr.io/torrentdam/server:${{ github.sha }}, ghcr.io/torrentdam/server:latest

.github/workflows/release.yml

@@ -1,32 +1,21 @@
 name: release
-
 on:
   push:
     tags:
       - 'v*'
-
 jobs:
-
   release:
     if: startsWith(github.ref, 'refs/tags/v')
     runs-on: ubuntu-latest
     steps:
-
-      - uses: actions/checkout@v1
-
-      - name: Set up java
-        uses: actions/setup-java@v2.1.0
-        with:
-          distribution: adopt
-          java-version: 17
-          java-package: jre
-
-      - name: Publish
+      - uses: actions/checkout@v3
+      - name: Release
         env:
-          SONATYPE_CREDS: ${{ secrets.SONATYPE_CREDS }}
-          PGP_SECRET_KEY: ${{ secrets.PGP_SECRET_KEY }}
+          MILL_SONATYPE_USERNAME: ${{ secrets.MILL_SONATYPE_USERNAME }}
+          MILL_SONATYPE_PASSWORD: ${{ secrets.MILL_SONATYPE_PASSWORD }}
+          MILL_PGP_SECRET_BASE64: ${{ secrets.MILL_PGP_SECRET_BASE64 }}
+          MILL_PGP_PASSPHRASE: ${{ secrets.MILL_PGP_PASSPHRASE }}
         run: |
-          echo ${PGP_SECRET_KEY} | base64 --decode | gpg --import
-          export VERSION=${GITHUB_REF#*/v} 
+          export VERSION=${GITHUB_REF#*/v}
           echo Publishing $VERSION
-          sbt protocolJS/publishSigned
+          ./mill mill.javalib.SonatypeCentralPublishModule/

.gitignore

@@ -1,9 +1,7 @@
-target
+out
 .idea
 .idea_modules
 .metals
 .bloop
 .bsp
-.vscode
-node_modules
-package-lock.json
+logs

AGENTS.md

@@ -0,0 +1,23 @@
+# Build/Test Commands
+
+```bash
+# Compile all modules
+./mill __.compile
+
+# Run the server
+./mill server.run
+
+# Build executable server JAR
+./mill server.assembly
+
+# Format code with Scalafmt
+./mill mill.scalalib.scalafmt.ScalafmtModule/reformatAll __.sources
+```
+
+## Project Structure
+
+- **build.mill**: Mill build definition (primary)
+- **protocol/**: Protocol message types shared with the web client
+- **server/**: HTTP server entry point
+
+Each module has `src/main/scala/`

Dockerfile

@@ -1,5 +1,8 @@
 FROM eclipse-temurin:25-jre-noble
-
-COPY ./server/target/universal/stage /opt/bittorrent-server
-
-ENTRYPOINT ["/opt/bittorrent-server/bin/server", "-Dcats.effect.tracing.mode=none", "-J-XX:+UnlockExperimentalVMOptions", "-J-XX:+UseCompactObjectHeaders"]
+COPY ./out/server/assembly.dest/out.jar /opt/torrentdam/server.jar
+ENTRYPOINT ["java", \
+            "-Dcats.effect.tracing.mode=none", \
+            "-XX:+UnlockExperimentalVMOptions", \
+            "-XX:+UseCompactObjectHeaders", \
+            "-jar", \
+            "/opt/torrentdam/server.jar"]

build.mill

@@ -0,0 +1,85 @@
+//| mill-version: 1.1.8
+//| mill-jvm-version: temurin:21.0.6
+import mill.*, scalalib.*, publish.*
+
+object protocol extends CommonSettings {
+  def mvnDeps = Seq(
+    Deps.bittorrent.common,
+    Deps.upickle,
+    Deps.`scodec-bits`,
+  )
+}
+
+object server extends CommonSettings {
+  def moduleDeps = Seq(protocol)
+  def mvnDeps = Seq(
+    Deps.bittorrent.bittorrent,
+    Deps.bittorrent.dht,
+    Deps.`cats-effect`,
+    Deps.`fs2-io`,
+    Deps.http4s.core,
+    Deps.http4s.dsl,
+    Deps.http4s.server,
+    Deps.http4s.client,
+    Deps.`woof-core`,
+    Deps.`woof-slf4j`,
+    Deps.`cats-effect-cps`,
+  )
+}
+
+trait CommonSettings extends ScalaModule, PublishModule {
+  def scalaVersion = "3.8.3"
+  def scalacOptions = Seq(
+    "-source:future",
+    "-Xkind-projector:underscores",
+  )
+  def sources = Task.Sources(
+    moduleDir / "src" / "main" / "scala"
+  )
+  def resources = Task.Sources(
+    moduleDir / "src" / "main" / "resources"
+  )
+  def publishVersion = sys.env.getOrElse("VERSION", "SNAPSHOT")
+  def pomSettings = PomSettings(
+    description = "Bittorrent server protocol",
+    organization = "io.github.torrentdam.server",
+    url = "https://github.com/TorrentDam/server",
+    licenses = Seq(License.`Unlicense`),
+    versionControl = VersionControl.github("TorrentDam", "server"),
+    developers = Seq(
+      Developer("lavrov", "Vitaly Lavrov", "https://github.com/lavrov")
+    )
+  )
+}
+
+object Deps {
+  object Versions {
+    val bittorrent = "3.8.0"
+    val `cats-effect` = "3.6.0"
+    val fs2 = "3.12.2"
+    val `scodec-bits` = "1.2.4"
+    val upickle = "2.0.0"
+    val http4s = "1.0.0-M40"
+    val `cats-effect-cps` = "0.9.21"
+    val woof = "0.9.0"
+  }
+  object bittorrent {
+    private val org = "io.github.torrentdam.bittorrent"
+    val common = mvn"${org}::common::${Versions.bittorrent}"
+    val bittorrent = mvn"${org}::bittorrent::${Versions.bittorrent}"
+    val dht = mvn"${org}::dht::${Versions.bittorrent}"
+  }
+  val `cats-effect` = mvn"org.typelevel::cats-effect::${Versions.`cats-effect`}"
+  val `fs2-io` = mvn"co.fs2::fs2-io::${Versions.fs2}"
+  val `scodec-bits` = mvn"org.scodec::scodec-bits::${Versions.`scodec-bits`}"
+  val upickle = mvn"com.lihaoyi::upickle::${Versions.upickle}"
+  object http4s {
+    val core = mvn"org.http4s::http4s-core::${Versions.http4s}"
+    val dsl = mvn"org.http4s::http4s-dsl::${Versions.http4s}"
+    val server = mvn"org.http4s::http4s-ember-server::${Versions.http4s}"
+    val client = mvn"org.http4s::http4s-ember-client::${Versions.http4s}"
+  }
+  val `cats-effect-cps` = mvn"com.github.rssh::cps-async-connect-cats-effect::${Versions.`cats-effect-cps`}"
+  val `woof-core` = mvn"org.legogroup::woof-core::${Versions.woof}"
+  val `woof-slf4j` = mvn"org.legogroup::woof-slf4j::${Versions.woof}"
+}