Add GitHub Actions CI workflows and lint fixes

Add comprehensive CI/CD workflows for automated testing:
- Test workflow runs on Ubuntu, macOS, and Windows
- Tests with Node.js 18.x and 20.x
- Installs libssh on all platforms
- Runs tests and attempts native module build
- Separate lint workflow for code quality checks
- Coverage reporting with Codecov integration

Also add lint scripts to package.json and fix ESLint errors:
- Fix lexical declaration in case block (config.ts)
- Change unused let to const (tunnel.ts)
- Add lint and lint:fix scripts
- Add test:coverage script

All tests passing (16/16) and linter clean.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: rathboma

.github/workflows/lint.yml

@@ -0,0 +1,31 @@
+name: Lint
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  lint:
+    name: ESLint & TypeScript Check
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20.x'
+          cache: 'yarn'
+
+      - name: Install dependencies
+        run: yarn install --frozen-lockfile
+
+      - name: Run ESLint
+        run: yarn lint
+
+      - name: TypeScript type check
+        run: yarn tsc --noEmit

.github/workflows/test.yml

@@ -0,0 +1,106 @@
+name: Tests
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  test:
+    name: Test on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        node-version: [18.x, 20.x]
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: 'yarn'
+
+      - name: Install libssh (Ubuntu)
+        if: runner.os == 'Linux'
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libssh-dev
+
+      - name: Install libssh (macOS)
+        if: runner.os == 'macOS'
+        run: |
+          brew install libssh
+
+      - name: Install libssh (Windows)
+        if: runner.os == 'Windows'
+        run: |
+          choco install cmake -y
+          vcpkg install libssh:x64-windows
+          vcpkg integrate install
+        shell: powershell
+
+      - name: Install dependencies
+        run: yarn install --frozen-lockfile
+
+      - name: Build TypeScript
+        run: yarn build:ts
+
+      - name: Run linter
+        run: yarn lint --max-warnings 0
+        continue-on-error: true
+
+      - name: Run tests
+        run: yarn test
+
+      - name: Build native module (Ubuntu/macOS)
+        if: runner.os != 'Windows'
+        run: yarn build:native
+        continue-on-error: true
+
+      - name: Build native module (Windows)
+        if: runner.os == 'Windows'
+        run: yarn build:native
+        env:
+          VCPKG_ROOT: C:\vcpkg
+        continue-on-error: true
+
+  test-coverage:
+    name: Test Coverage
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20.x'
+          cache: 'yarn'
+
+      - name: Install libssh
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libssh-dev
+
+      - name: Install dependencies
+        run: yarn install --frozen-lockfile
+
+      - name: Build TypeScript
+        run: yarn build:ts
+
+      - name: Run tests with coverage
+        run: yarn test --coverage
+
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v4
+        with:
+          file: ./coverage/coverage-final.json
+          fail_ci_if_error: false

lib/config.ts

@@ -116,7 +116,7 @@ export class SSHConfigParser {
       case 'user':
         host.user = value;
         break;
-      case 'identityfile':
+      case 'identityfile': {
         if (!host.identityFile) {
           host.identityFile = [];
         }
@@ -126,6 +126,7 @@ export class SSHConfigParser {
           : value;
         host.identityFile.push(expandedValue);
         break;
+      }
       case 'proxyjump':
         host.proxyJump = value;
         break;

lib/tunnel.ts

@@ -149,7 +149,7 @@ export class SSHTunnel {
    * Set up bidirectional data forwarding between socket and channel
    */
   private setupDataForwarding(channelId: number, channel: SSHChannel, socket: net.Socket): void {
-    let isForwarding = true;
+    const isForwarding = true;
 
     // Socket -> Channel
     socket.on('data', async (data) => {

package.json

@@ -12,6 +12,9 @@
     "clean": "node-gyp clean && rm -rf dist",
     "test": "jest",
     "test:watch": "jest --watch",
+    "test:coverage": "jest --coverage",
+    "lint": "eslint lib/**/*.ts test/**/*.ts examples/**/*.ts",
+    "lint:fix": "eslint lib/**/*.ts test/**/*.ts examples/**/*.ts --fix",
     "rebuild": "yarn clean && yarn build:all"
   },
   "keywords": [