TCP chat server and CLI client in Rust

.githooks/pre-commit

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+# pre-commit hook: runs fmt check, build, and clippy before every commit.
+set -e
+
+echo "==> [pre-commit] Checking formatting..."
+cargo fmt --all -- --check
+
+echo "==> [pre-commit] Building..."
+cargo build --all --quiet
+
+echo "==> [pre-commit] Running clippy..."
+cargo clippy --all-targets --all-features -- -D warnings
+
+echo "==> [pre-commit] All checks passed!"

.github/workflows/ci.yml

@@ -0,0 +1,76 @@
+name: CI
+
+on:
+  push:
+    branches: ["**"]
+  pull_request:
+    branches: ["**"]
+
+jobs:
+  check:
+    name: Format / Clippy / Test
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install stable Rust
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          components: rustfmt, clippy
+
+      - name: Cache cargo registry
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+            target
+          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+
+      - name: Check formatting
+        run: cargo fmt --all -- --check
+
+      - name: Clippy (no warnings)
+        run: cargo clippy --all-targets --all-features -- -D warnings
+
+      - name: Run unit & integration tests
+        run: cargo test --all
+
+  e2e:
+    name: End-to-End smoke test
+    runs-on: ubuntu-latest
+    needs: check
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install stable Rust
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Cache cargo registry
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+            target
+          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+
+      - name: Build release binaries
+        run: cargo build --release --all
+
+      - name: Start server in background
+        run: |
+          ./target/release/server &
+          echo "SERVER_PID=$!" >> "$GITHUB_ENV"
+          # Wait for server to be ready
+          sleep 1
+
+      - name: Send a message via client (non-interactive)
+        run: |
+          # Use a here-doc to pipe commands into the client's stdin
+          # The client reads stdin line by line; we send a message then leave.
+          printf 'send Hello from CI!\nleave\n' | \
+            HOST=127.0.0.1 PORT=8080 USERNAME=ci_bot ./target/release/client
+          EXIT=$?
+          kill "$SERVER_PID" || true
+          exit $EXIT

.gitignore

@@ -1,14 +1 @@
-# Generated by Cargo
-# will have compiled files and executables
-debug/
-target/
-
-# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
-# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
-Cargo.lock
-
-# These are backup files generated by rustfmt
-**/*.rs.bk
-
-# MSVC Windows builds of rustc generate these, which store debugging information
-*.pdb
+target/