build: add Docker support

.github/workflows/build.yml

@@ -3,10 +3,12 @@ name: Build
 on:
   push:
     branches:
-      - "*"
+      - "**"
+    tags:
+      - '[0-9]+.[0-9]+.[0-9]+'
   pull_request:
     branches:
-      - "*"
+      - "**"
     types: [opened, synchronize, reopened]
 
 concurrency:
@@ -168,10 +170,9 @@ jobs:
     name: Deploy artifacts
     needs: [build-win, build-linux, build-macos]
     runs-on: ubuntu-latest
-    if: github.event_name == 'push' && github.ref == 'refs/heads/master'
+    if: github.ref_type == 'tag'
     steps:
       - name: Setup main environment
-        if: github.ref == 'refs/heads/master'
         run: echo "ALTERWARE_MASTER_SERVER_PATH=${{ secrets.ALTERWARE_MASTER_SERVER_SSH_PATH  }}" >> $GITHUB_ENV
 
       - name: Download Release binaries
@@ -193,3 +194,61 @@ jobs:
 
       - name: Publish changes
         run: ssh ${{ secrets.ALTERWARE_MASTER_SERVER_SSH_USER }}@${{ secrets.ALTERWARE_MASTER_SERVER_SSH_ADDRESS }} ${{ secrets.ALTERWARE_SSH_SERVER_PUBLISH_COMMAND }}
+
+  docker:
+    name: Create Docker Image
+    needs: [build-win, build-linux, build-macos]
+    runs-on: ubuntu-latest
+    if: github.ref_type == 'tag'
+    steps:
+      - name: Check out files
+        uses: actions/checkout@main
+        with:
+          sparse-checkout: |
+            Dockerfile
+            README.md
+          sparse-checkout-cone-mode: false
+
+      - name: Download Release binaries
+        uses: actions/download-artifact@main
+
+      - name: Compress Binaries
+        run: |
+          for dir in */; do
+            if [[ $dir == *"windows"* ]]; then
+              cd "$dir" && zip -r "../${dir%/}.zip" . && cd ..
+            else
+              tar -czvf "${dir%/}.tar.gz" -C "$dir" .
+            fi
+          done
+        shell: bash
+
+      - name: Setup Docker Buildx
+        uses: docker/setup-buildx-action@v3.2.0
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v3.1.0
+        with:
+          username: ${{ secrets.DOCKERHUB_USER }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - id: meta
+        uses: docker/metadata-action@v5.5.1
+        with:
+          images: |
+            alterware/master-server
+          tags: |
+            ${{ github.ref_name }}
+            latest
+
+      - name: Build and Push Docker Image
+        id: build-and-push
+        uses: docker/build-push-action@v5.1.0
+        with:
+          context: .
+          platforms: linux/amd64
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

Dockerfile

@@ -0,0 +1,13 @@
+FROM ubuntu:latest
+
+RUN apt-get update
+RUN apt-get install -y libc++-dev libcurl4-gnutls-dev
+
+COPY --chmod=755 ./linux-x64-release/alterware-master /usr/local/bin/
+
+RUN groupadd alterware-master && useradd -r -g alterware-master alterware-master
+USER alterware-master
+
+EXPOSE 20810/udp
+
+ENTRYPOINT ["/usr/local/bin/alterware-master"]

README.md

@@ -4,6 +4,13 @@
 # AlterWare: Master Server
 This is the master server our clients use. It is based on the DP Master Server (ID Tech) protocol
 
+## Usage
+Run using [Docker][docker-link]
+
+```bash
+docker run -p 20810:20810/udp alterware/master-server:latest
+```
+
 ## Build
 - Install [Premake5][premake5-link] and add it to your system PATH
 - Clone this repository using [Git][git-link]
@@ -18,6 +25,7 @@ Requirements for Unix systems:
 - Customization: Modifications to the Premake5.lua script may be required
 - Platform support: Details regarding supported platforms are available in [build.yml][build-link]
 
+[docker-link]:            https://www.docker.com
 [premake5-link]:          https://premake.github.io
 [git-link]:               https://git-scm.com
 [mold-link]:              https://github.com/rui314/mold

src/crypto_key.cpp

@@ -36,7 +36,7 @@ namespace crypto_key
 
 			if (!utils::io::write_file("./private.key", key.serialize()))
 			{
-				throw std::runtime_error("Failed to write server key!");
+				console::error("Failed to write server key!");
 			}
 
 			console::info("Generated cryptographic key: %llX", key.get_hash());

src/services/kill_list.cpp

@@ -142,8 +142,14 @@ void kill_list::write_to_disk()
 			stream << entry.ip_address_ << " " << entry.reason_ << "\n";
 		}
 
-		utils::io::write_file(kill_file, stream.str(), false);
+		if (utils::io::write_file(kill_file, stream.str(), false))
-		console::info("Wrote %s to disk (%zu entries)", kill_file, entries.size());
+		{
+			console::info("Wrote %s to disk (%zu entries)", kill_file, entries.size());
+		}
+		else
+		{
+			console::error("Failed to write %s!", kill_file);
+		}
 	});
 }