Publish on update package.json version (#171)

Changes the release process from pushing a tag to automatically
publishing when updating the version in `package.json`.

Author: rvanasa

.github/workflows/release.yml .github/workflows/publish.yml.github/workflows/release.yml renamed to .github/workflows/publish.yml

@@ -1,28 +1,44 @@
-name: Release
+name: Publish
 
 on:
-  release:
-    types: [published]
+  push:
+    branches:
+      - main
+    paths:
+      - 'package.json'
 
 permissions:
   contents: read
   id-token: write
 
 jobs:
-  publish:
+  version-check:
     runs-on: ubuntu-latest
-    environment: npm
+    outputs:
+      version_changed: ${{ steps.check.outputs.changed }}
+      version: ${{ steps.check.outputs.version }}
     steps:
       - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
 
-      - name: Validate version
+      - name: Detect package.json version bump
+        id: check
         run: |
-          TAG_VERSION="${GITHUB_REF_NAME#v}"
-          PKG_VERSION=$(node -p "require('./package.json').version")
-          if [ "$TAG_VERSION" != "$PKG_VERSION" ]; then
-            echo "::error::Tag version ($TAG_VERSION) does not match package.json version ($PKG_VERSION)"
-            exit 1
-          fi
+          set -euo pipefail
+          NEW=$(node -p "require('./package.json').version")
+          echo "version=${NEW}" >> "$GITHUB_OUTPUT"
+          BEFORE="${{ github.event.before }}"
+          OLD=$(git show "${BEFORE}:package.json" 2>/dev/null | jq -r .version 2>/dev/null) || OLD=""
+          echo "changed=$([[ "$BEFORE" =~ ^0{40}$ || "$OLD" != "$NEW" ]] && echo true || echo false)" >> "$GITHUB_OUTPUT"
+
+  publish:
+    needs: version-check
+    if: needs.version-check.outputs.version_changed == 'true'
+    runs-on: ubuntu-latest
+    environment: npm
+    steps:
+      - uses: actions/checkout@v4
 
       - name: Setup Node.js
         uses: actions/setup-node@v4
@@ -40,7 +56,7 @@ jobs:
 
   # Runs after npm publish; failures here do not affect the published package (re-run this job only if needed).
   notify-vscode-motoko:
-    needs: publish
+    needs: [publish, version-check]
     runs-on: ubuntu-latest
     steps:
       - name: Generate GitHub App token
@@ -59,4 +75,4 @@ jobs:
           token: ${{ steps.dispatch-token.outputs.token }}
           repository: caffeinelabs/vscode-motoko
           event-type: motoko-release
-          client-payload: '{"version":"${{ github.event.release.tag_name }}"}'
+          client-payload: '{"version":"v${{ needs.version-check.outputs.version }}"}'

RELEASING.md

@@ -21,18 +21,16 @@ with optional `moc_version` and `core_version` inputs. Leave them empty to auto-
 
 ## Publishing to npm
 
-After merging a moc update (or any version bump), create a **GitHub Release**:
+After merging a moc update (or any version bump), bump the **`version`** field in `package.json` and merge to `main`.
 
-1. Go to [Releases](https://github.com/caffeinelabs/node-motoko/releases/new)
-2. Create a new tag matching the `package.json` version (e.g. `v4.1.0`)
-3. Click "Publish release"
+The [`release`](.github/workflows/release.yml) workflow runs when `package.json` changes on `main`. If the **version** field changed compared to the previous commit on `main`, it will:
 
-The [`release`](.github/workflows/release.yml) workflow will automatically:
-- Validate the tag matches `package.json`
 - Build and test
 - Publish to npm via [OIDC trusted publishing](https://docs.npmjs.com/trusted-publishers) (no tokens needed)
 - Notify [vscode-motoko](https://github.com/caffeinelabs/vscode-motoko) to open a PR bumping the `motoko` dependency (GitHub App must include the `vscode-motoko` repo; same app as `update-moc`)
 
+Updating the version in `package.json` automatically publishes the package when merged into `main`.
+
 ## Local development (generate)
 
 To regenerate files locally against a specific version: