add release workflow

.github/workflows/release.yml

@@ -0,0 +1,31 @@
+name: 'Publish to npm'
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [14.x]
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Publish to npm
+      uses: actions/setup-node@v3
+      with:
+        node-version: ${{ matrix.node-version }}
+        registry-url: 'https://registry.npmjs.org'
+        cache: 'yarn'
+    - run: |
+        yarn install --frozen-lockfile
+    - run: |
+        LATEST=$(npm show @unleash/proxy-client-js version)
+        TAG=$(node scripts/npm-tag.js $LATEST)
+        npm publish --tag ${TAG:-latest}
+      env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

.github/workflows/release_changelog.yml

@@ -0,0 +1,26 @@
+name: 'Releases'
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  release:
+    if: startsWith(github.ref, 'refs/tags/')
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: Build changelog
+        id: github_release
+        uses: metcalfc/changelog-generator@v0.4.4
+        with:
+          myToken: ${{ secrets.GITHUB_TOKEN }}
+      - name: Create release
+        uses: actions/create-release@v1
+        with:
+          tag_name: ${{ github.ref }}
+          release_name: ${{ github.ref }}
+          body: ${{ steps.github_release.outputs.changelog }}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN}}

scripts/npm-tag.js

@@ -0,0 +1,18 @@
+const semver = require('semver');
+
+const latestUnleashVersion = process.argv[2];
+
+const version = require('../package.json').version;
+
+function isPrerelease(version) {
+    const arr = semver.prerelease(version);
+    return arr && arr.length > 0;
+}
+
+if (isPrerelease(version)) {
+    console.log('beta');
+} else if (semver.gt(version, latestUnleashVersion)) {
+    console.log('latest');
+} else {
+    console.log('previous');
+}