Always use downloaded Yarn as per documentation

.github/workflows/build-examples.yml

@@ -15,8 +15,6 @@ jobs:
         uses: actions/setup-node@v3
         with:
           node-version: 18
-      - name: Install yarn
-        run: npm install -g yarn@1.22.17
       - name: Gradle Version
         run: ./gradlew --version
       - name: Build Node.js Scripts Project

.github/workflows/build.yml

@@ -22,8 +22,6 @@ jobs:
         uses: actions/setup-node@v3
         with:
           node-version: 18
-      - name: Install yarn
-        run: npm install -g yarn@1.22.17
       - name: Setup Gradle
         uses: gradle/gradle-build-action@v2
         with:

.github/workflows/publish.yml

@@ -20,8 +20,6 @@ jobs:
         uses: actions/setup-node@v3
         with:
           node-version: 18
-      - name: Install yarn
-        run: npm install -g yarn@1.22.17
       - name: Build
         run: ./gradlew build
       - name: Publish

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## Version 6.x *(unreleased)*
 * Upgrade default Node to 18.17.1 and npm to 9.6.7
+* Always use downloaded Yarn as per documentation [#284](https://github.com/node-gradle/gradle-node-plugin/issues/284)
 
 ## Version 6.0.0 *(2023-08-15)*
 * Removed deprecated `nodeModulesDir` from `NodeExtension`

src/main/kotlin/com/github/gradle/node/variant/VariantComputer.kt

@@ -153,12 +153,13 @@ open class VariantComputer {
     fun computeYarnBinDir(yarnDirProvider: Provider<Directory>, platform: Property<Platform>) = computeProductBinDir(yarnDirProvider, platform)
 
     fun computeYarnExec(nodeExtension: NodeExtension, yarnBinDirProvider: Provider<Directory>): Provider<String> {
-        return zip(nodeExtension.yarnCommand, nodeExtension.download, yarnBinDirProvider).map {
-            val (yarnCommand, download, yarnBinDir) = it
+        return zip(nodeExtension.yarnCommand, yarnBinDirProvider).map {
+            val (yarnCommand, yarnBinDir) = it
             val command = if (nodeExtension.resolvedPlatform.get().isWindows()) {
                 yarnCommand.mapIf({ it == "yarn" }) { "yarn.cmd" }
             } else yarnCommand
-            if (download) yarnBinDir.dir(command).asFile.absolutePath else command
+            // This is conceptually pretty simple as we per documentation always download yarn
+            yarnBinDir.dir(command).asFile.absolutePath
         }
     }
 

src/main/kotlin/com/github/gradle/node/yarn/exec/YarnExecRunner.kt

@@ -58,17 +58,13 @@ abstract class YarnExecRunner {
         yarnBinDirProvider: Provider<Directory>,
         variantComputer: VariantComputer
     ): Provider<List<String>> {
-        return nodeExtension.download.flatMap { download ->
-            if (!download) {
-                providers.provider { listOf<String>() }
-            }
-            val nodeBinDirProvider = variantComputer.computeNodeBinDir(nodeDirProvider, nodeExtension.resolvedPlatform)
-            val npmDirProvider = variantComputer.computeNpmDir(nodeExtension, nodeDirProvider)
-            val npmBinDirProvider = variantComputer.computeNpmBinDir(npmDirProvider, nodeExtension.resolvedPlatform)
-            zip(nodeBinDirProvider, npmBinDirProvider, yarnBinDirProvider)
-                    .map { (nodeBinDir, npmBinDir, yarnBinDir) ->
-                        listOf(yarnBinDir, npmBinDir, nodeBinDir).map { file -> file.asFile.absolutePath }
-                    }
-        }
+        // This is conceptually pretty simple as we per documentation always download yarn
+        val nodeBinDirProvider = variantComputer.computeNodeBinDir(nodeDirProvider, nodeExtension.resolvedPlatform)
+        val npmDirProvider = variantComputer.computeNpmDir(nodeExtension, nodeDirProvider)
+        val npmBinDirProvider = variantComputer.computeNpmBinDir(npmDirProvider, nodeExtension.resolvedPlatform)
+        return zip(nodeBinDirProvider, npmBinDirProvider, yarnBinDirProvider)
+                .map { (nodeBinDir, npmBinDir, yarnBinDir) ->
+                    listOf(yarnBinDir, npmBinDir, nodeBinDir).map { file -> file.asFile.absolutePath }
+                }
     }
 }