Make it much easier to update the demo

Author: Wavesonics

docs/HOW-TO-RELEASE.md

@@ -1,4 +1,30 @@
+# How to release
+
 - Pushed all changes
 - Create a tag in the format `vX.Y.Z`
 - Push the tag
-- The `deploy.yml` workflow will run and publish the artifacts to Maven Central
+- The `deploy.yml` workflow will run and publish the artifacts to Maven Central
+
+## How to update the demo
+
+1. Change to the `demo` branch in git
+
+2. Run the updateDemo task:
+   ```bash
+   ./gradlew :sampleApp:updateDemo
+   ```
+
+   This will automatically:
+   - Build the WASM distribution
+   - Copy all files to the docs directory
+   - Remove old WASM files that are no longer referenced
+
+3. Commit and push the changes:
+   ```bash
+   git add docs/
+   git commit -m "Update demo site"
+   git push
+   ```
+
+4. The demo will be available at the GitHub Pages URL (typically
+   `https://wavesonics.github.io/ComposeTextEditorLibrary/`)

sampleApp/build.gradle.kts

@@ -169,6 +169,35 @@ android {
 		}
 	}
 }
+
+tasks.register<Copy>("updateDemo") {
+	description = "Builds the WASM distribution and copies it to the docs directory for GitHub Pages"
+	group = "distribution"
+
+	dependsOn("wasmJsBrowserDistribution")
+
+	from(layout.buildDirectory.dir("dist/wasmJs/productionExecutable"))
+	into(layout.projectDirectory.dir("../docs"))
+
+	doLast {
+		val docsDir = layout.projectDirectory.dir("../docs").asFile
+		val buildDir = layout.buildDirectory.dir("dist/wasmJs/productionExecutable").get().asFile
+
+		// Get list of WASM files in build output
+		val newWasmFiles =
+			buildDir.listFiles { file -> file.extension == "wasm" }?.map { it.name }?.toSet() ?: emptySet()
+
+		// Remove old WASM files that are no longer in the build
+		docsDir.listFiles { file -> file.extension == "wasm" }?.forEach { oldFile ->
+			if (oldFile.name !in newWasmFiles) {
+				println("Removing old WASM file: ${oldFile.name}")
+				oldFile.delete()
+			}
+		}
+
+		println("Demo updated in docs/ directory")
+	}
+}
 dependencies {
 	implementation(libs.lifecycle.runtime.ktx)
 	implementation(libs.activity.compose)