CI: Adds publishing script for npm

Author: ofhouse

.github/workflows/CI.yml

@@ -24,6 +24,14 @@ jobs:
       - name: Build
         run: yarn build
 
+      - name: Upload build artifact
+        uses: actions/upload-artifact@v2
+        with:
+          name: dist
+          path: |
+            dist/**/*
+          if-no-files-found: error
+
   test:
     runs-on: ubuntu-latest
     env:
@@ -51,3 +59,25 @@ jobs:
 
       - name: Run tests
         run: yarn test --runInBand
+
+  publishRelease:
+    name: Potentially publish release
+    runs-on: ubuntu-latest
+    needs: [build, test]
+    if: github.ref == 'refs/heads/main'
+    env:
+      NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
+
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 25
+
+      - run: git fetch --depth=1 origin +refs/tags/*:refs/tags/*
+
+      - name: Download build artifact
+        uses: actions/download-artifact@v2
+        with:
+          name: dist
+
+      - run: ./scripts/publish-release.sh

scripts/publish-release.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+git describe --exact-match
+
+if [[ ! $? -eq 0 ]];then
+  echo "Nothing to publish, exiting.."
+  exit 0;
+fi
+
+if [[ -z "$NPM_TOKEN" ]];then
+  echo "No NPM_TOKEN, exiting.."
+  exit 0;
+fi
+
+echo "//registry.npmjs.org/:_authToken=$NPM_TOKEN" >> ~/.npmrc
+
+if [[ $(git describe --match "v[0-9]*" --abbrev=0 HEAD 2> /dev/null) ]];then
+  echo "Publishing version"
+  npm publish --access public
+
+  # Make sure to exit script with code 1 if publish failed
+  if [[ ! $? -eq 0 ]];then
+    exit 1;
+  fi
+fi