Create check_if_version_changed.yml

Author: jontingvold

.github/workflows/check_if_version_changed.yml

@@ -0,0 +1,31 @@
+name: Check if remembered to update version
+
+on:
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  check_if_version_changed:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out Git repository
+        uses: actions/checkout@v2
+
+      - name: Check if version updated
+        run: | 
+          # In case only a shallow clone was done
+          git fetch --tags
+          
+          PACKAGE_VERSION=$(cat 'package.json' | jq -r '.version')      # E.g.  0.1.1
+          LATEST_TAG=$(git tag -l --sort -version:refname | head -n 1)  # E.g. v0.1.1
+
+          if [[ "${PACKAGE_VERSION}" && ! $(git tag | grep "${PACKAGE_VERSION}") ]]; then
+            echo "Version has changed!"
+            echo "Latest version tag is $LATEST_TAG while package.json has been updated to v${PACKAGE_VERSION}"
+            exit 0  # Success
+          else
+            echo "The version number in package.json is not updated!"
+            echo "The version number in package.json (v${PACKAGE_VERSION}) is <= the latest version tag ($LATEST_TAG)"
+            exit 1  # Error
+          fi