chore: add release-please automation

.github/workflows/release-please.yml

@@ -0,0 +1,60 @@
+on:
+  push:
+    branches:
+      - main
+
+name: Run Release Please
+jobs:
+  release-please:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: google-github-actions/release-please-action@v2
+        id: release
+        with:
+          command: manifest
+          token: ${{secrets.RELEASE_PR_TOKEN}}
+          default-branch: main
+
+      # The logic below handles the npm publication:
+      - name: Checkout Repository
+        if: ${{ steps.release.outputs.releases_created }}
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Setup Node
+        uses: actions/setup-node@v1
+        if: ${{ steps.release.outputs.releases_created }}
+        with:
+          node-version: 14
+          registry-url: 'https://registry.npmjs.org'
+
+      - name: Cache Dependencies
+        if: ${{ steps.release.outputs.releases_created }}
+        uses: actions/cache@v2
+        with:
+          path: |
+            node_modules
+            package-lock.json
+            detectors/node/*/node_modules
+            metapackages/*/node_modules
+            packages/*/node_modules
+            plugins/node/*/node_modules
+            plugins/web/*/node_modules
+            propagators/*/node_modules
+          key: ${{ runner.os }}-${{ matrix.container }}-${{ hashFiles('**/package.json') }}
+
+      - name: Build Packages
+        if: ${{ steps.release.outputs.releases_created }}
+        run: |
+          npm install
+          npx lerna bootstrap --no-ci
+
+      # Release Please has already incremented versions and published tags, so we just
+      # need to publish all unpublished versions to NPM here
+      # See: https://github.com/lerna/lerna/tree/main/commands/publish#bump-from-package
+      - name: Publish to NPM
+        if: ${{ steps.release.outputs.releases_created }}
+        env:
+          NODE_AUTH_TOKEN: ${{secrets.NPM_TOKEN}}
+        run: npx lerna publish from-package --no-push --no-git-tag-version --no-verify-access --yes

.gitignore

@@ -81,3 +81,6 @@ package.json.lerna_backup
 
 *.iml
 .idea
+
+# version.ts file is automatically generated at compile time
+version.ts

.release-please-manifest.json

@@ -0,0 +1,42 @@
+{
+  "detectors/node/opentelemetry-resource-detector-alibaba-cloud": "0.25.0",
+  "detectors/node/opentelemetry-resource-detector-aws": "0.25.0",
+  "detectors/node/opentelemetry-resource-detector-gcp": "0.25.0",
+  "detectors/node/opentelemetry-resource-detector-github": "0.25.0",
+  "metapackages/auto-instrumentations-node": "0.25.0",
+  "metapackages/auto-instrumentations-web": "0.25.0",
+  "packages/opentelemetry-browser-extension-autoinjection": "0.25.0",
+  "packages/opentelemetry-host-metrics": "0.25.0",
+  "packages/opentelemetry-id-generator-aws-xray": "0.25.0",
+  "packages/opentelemetry-test-utils": "0.25.0",
+  "plugins/node/opentelemetry-instrumentation-aws-lambda": "0.25.0",
+  "plugins/node/opentelemetry-instrumentation-bunyan": "0.25.0",
+  "plugins/node/opentelemetry-instrumentation-cassandra": "0.25.0",
+  "plugins/node/opentelemetry-instrumentation-connect": "0.25.0",
+  "plugins/node/opentelemetry-instrumentation-dns": "0.25.0",
+  "plugins/node/opentelemetry-instrumentation-express": "0.25.0",
+  "plugins/node/opentelemetry-instrumentation-generic-pool": "0.25.0",
+  "plugins/node/opentelemetry-instrumentation-graphql": "0.25.0",
+  "plugins/node/opentelemetry-instrumentation-hapi": "0.25.0",
+  "plugins/node/opentelemetry-instrumentation-ioredis": "0.25.0",
+  "plugins/node/opentelemetry-instrumentation-knex": "0.25.0",
+  "plugins/node/opentelemetry-instrumentation-koa": "0.25.0",
+  "plugins/node/opentelemetry-instrumentation-memcached": "0.25.0",
+  "plugins/node/opentelemetry-instrumentation-mongodb": "0.25.0",
+  "plugins/node/opentelemetry-instrumentation-mysql": "0.25.0",
+  "plugins/node/opentelemetry-instrumentation-mysql2": "0.25.0",
+  "plugins/node/opentelemetry-instrumentation-nestjs-core": "0.25.0",
+  "plugins/node/opentelemetry-instrumentation-net": "0.25.0",
+  "plugins/node/opentelemetry-instrumentation-pg": "0.25.0",
+  "plugins/node/opentelemetry-instrumentation-pino": "0.25.0",
+  "plugins/node/opentelemetry-instrumentation-redis": "0.25.0",
+  "plugins/node/opentelemetry-instrumentation-restify": "0.25.0",
+  "plugins/node/opentelemetry-instrumentation-router": "0.25.0",
+  "plugins/node/opentelemetry-instrumentation-winston": "0.25.0",
+  "plugins/web/opentelemetry-instrumentation-document-load": "0.25.0",
+  "plugins/web/opentelemetry-instrumentation-user-interaction": "0.25.0",
+  "plugins/web/opentelemetry-plugin-react-load": "0.25.0",
+  "propagators/opentelemetry-propagator-aws-xray": "0.25.0",
+  "propagators/opentelemetry-propagator-grpc-census-binary": "0.25.0",
+  "propagators/opentelemetry-propagator-ot-trace": "0.25.0"
+}

RELEASING.md

@@ -1,30 +1,11 @@
 # Releasing OpenTelemetry Packages (for Maintainers Only)
 
-This document explains how to publish all OT modules at version x.y.z. Ensure that you’re following semver when choosing a version number.
-
-## Auto-generate a Release PR
-
-Navigate to the [Create a Release PR Worflow](https://github.com/open-telemetry/opentelemetry-js-contrib/actions/workflows/release-pr.yml). Click the "Run workflow" dropdown, enter the semver-compliant version to release, then click "Run workflow". It will generate a release pull request from a branch named like `release/x.y.z`.
-
-## Review Release PR
-
-If necessary, update sample code or documentation on the `release/x.y.z` branch to be included in the release. Another maintainer should approve the PR, specifically validating the automatic updates and verifying the tests are passing.
-
-NOTE: If any major changes are merged while the release PR is open, the CHANGELOG on the `release/x.y.z` branch must be manually updated to reflect the change.
-
-## Merge Release PR
-
-After approval, merge the release PR. This will automatically publish all packages. Verify:
-
-* The [publish workflow](https://github.com/open-telemetry/opentelemetry-js-contrib/actions/workflows/publish.yml) runs successfully
-* The new version is available in NPM, e.g. for the [Express instrumentation package](https://www.npmjs.com/package/@opentelemetry/instrumentation-express)
-* A [GitHub Release](https://github.com/open-telemetry/opentelemetry-js-contrib/releases) was cut correctly, with a tag pointing to the new version, and a body of the changelog
-
-That's it! No need to read on unless something above went wrong.
+This repository uses [Release Please](https://github.com/googleapis/release-please) to manage its releases automatically and independently.
+Modified packages are automatically published to NPM when the auto-generated Release Please PR is merged.
 
 # Manual Publishing Process
 
-If any step of the above automated process fails, complete the release manually by picking up at the failed step.
+For posterity, or in the event of any failures with release-please, the process for performing a manual release is below.
 
 Manual Release Process Steps:
 

detectors/node/opentelemetry-resource-detector-alibaba-cloud/package.json

@@ -11,7 +11,8 @@
     "compile": "npm run version:update && tsc -p .",
     "lint": "eslint . --ext .ts",
     "lint:fix": "eslint . --ext .ts --fix",
-    "precompile": "tsc --version",
+    "precompile": "tsc --version && lerna run version --scope $(npm pkg get name) --include-filtered-dependencies",
+    "prewatch": "npm run precompile",
     "prepare": "npm run compile",
     "test": "nyc ts-mocha -p tsconfig.json 'test/**/*.test.ts'",
     "tdd": "npm run test -- --watch-extensions ts --watch",

detectors/node/opentelemetry-resource-detector-aws/package.json

@@ -11,7 +11,8 @@
     "compile": "npm run version:update && tsc -p .",
     "lint": "eslint . --ext .ts",
     "lint:fix": "eslint . --ext .ts --fix",
-    "precompile": "tsc --version",
+    "precompile": "tsc --version && lerna run version --scope $(npm pkg get name) --include-filtered-dependencies",
+    "prewatch": "npm run precompile",
     "prepare": "npm run compile",
     "test": "nyc ts-mocha -p tsconfig.json 'test/**/*.test.ts'",
     "tdd": "npm run test -- --watch-extensions ts --watch",

detectors/node/opentelemetry-resource-detector-gcp/package.json

@@ -11,7 +11,8 @@
     "compile": "npm run version:update && tsc -p .",
     "lint": "eslint . --ext .ts",
     "lint:fix": "eslint . --ext .ts --fix",
-    "precompile": "tsc --version",
+    "precompile": "tsc --version && lerna run version --scope $(npm pkg get name) --include-filtered-dependencies",
+    "prewatch": "npm run precompile",
     "prepare": "npm run compile",
     "test": "nyc ts-mocha -p tsconfig.json 'test/**/*.test.ts'",
     "tdd": "npm run test -- --watch-extensions ts --watch",