Automatically deploy Wasm demo when master changes

.github/workflows/build.yml

@@ -93,7 +93,7 @@ jobs:
  - name: Lint for left-over debug prints
  run: cargo clippy -- -D clippy::print_stdout -D clippy::print_stderr
 
- wasm:
+ wasm-build:
  name: Build Wasm demo
  runs-on: ubuntu-latest
  steps:
@@ -103,14 +103,64 @@ jobs:
  - name: Install wasm-pack
  run: curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh
 
- - name: Build Rust code
+ - name: Build textwrap-wasm-demo
  run: wasm-pack build
  working-directory: examples/wasm
 
- - name: Install Npm dependencies
+ - name: Install textwrap-wasm-demo-app dependencies
  run: npm install
  working-directory: examples/wasm/www
 
- - name: Pack JavaScript and HTML
+ - name: Bundle textwrap-wasm-demo-app
  run: npm run build
  working-directory: examples/wasm/www
+
+ - name: Upload bundled textwrap-wasm-demo-app
+ uses: actions/upload-artifact@v2
+ with:
+ name: textwrap-wasm-demo-app
+ path: examples/wasm/www/dist
+
+ wasm-deploy:
+ name: Deploy Wasm demo
+ needs: wasm-build
+ if: github.ref == 'ref/head/master'
+ runs-on: ubuntu-latest
+ steps:
+ - name: Check out repository
+ uses: actions/checkout@v2
+ with:
+ ref: gh-pages
+
+ - name: Cleanup previous deployment
+ run: rm *
+
+ - name: Download bundled textwrap-wasm-demo-app
+ uses: actions/download-artifact@v2
+ with:
+ name: textwrap-wasm-demo-app
+
+ - name: Add and remove changed files
+ id: git-add
+ run: |
+ git add --verbose --all
+ if git diff --staged --quiet --exit-code; then
+ echo "No changes found in textwrap-wasm-demo-app"
+ echo '::set-output name=has-changes::false'
+ else
+ echo '::set-output name=has-changes::true'
+ fi
+
+ - name: Configure Git user
+ if: steps.git-add.outputs.has-changes == 'true'
+ run: |
+ git config user.name "Martin Geisler"
+ git config user.email "martin@geisler.net"
+
+ - name: Commit textwrap-wasm-demo-app changes
+ if: steps.git-add.outputs.has-changes == 'true'
+ run: git commit -m "Update Wasm demo to ${GITHUB_SHA::7}"
+
+ - name: Deploy textwrap-wasm-demo-app
+ if: steps.git-add.outputs.has-changes == 'true'
+ run: git push origin