From 39e3746cf6ad3b16e4cadbfcb192a3808a8edc2a Mon Sep 17 00:00:00 2001
From: Phillip Webb <pwebb@vmware.com>
Date: Tue, 25 May 2021 17:16:49 -0700
Subject: [PATCH] Force Eclipse to use JavaSE-1.8 runtime

Add `EclipseConventions` to force the JavaSE-1.8 runtime to be applied
to the imported projects.

Closes gh-26669
---
 .../boot/build/ConventionsPlugin.java         |  3 +-
 .../boot/build/EclipseConventions.java        | 40 +++++++++++++++++++
 2 files changed, 42 insertions(+), 1 deletion(-)
 create mode 100644 buildSrc/src/main/java/org/springframework/boot/build/EclipseConventions.java

diff --git a/buildSrc/src/main/java/org/springframework/boot/build/ConventionsPlugin.java b/buildSrc/src/main/java/org/springframework/boot/build/ConventionsPlugin.java
index 66aecc87937..3aef095deca 100644
--- a/buildSrc/src/main/java/org/springframework/boot/build/ConventionsPlugin.java
+++ b/buildSrc/src/main/java/org/springframework/boot/build/ConventionsPlugin.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -47,6 +47,7 @@ public class ConventionsPlugin implements Plugin<Project> {
 		new MavenPublishingConventions().apply(project);
 		new AsciidoctorConventions().apply(project);
 		new KotlinConventions().apply(project);
+		new EclipseConventions().apply(project);
 	}
 
 }
diff --git a/buildSrc/src/main/java/org/springframework/boot/build/EclipseConventions.java b/buildSrc/src/main/java/org/springframework/boot/build/EclipseConventions.java
new file mode 100644
index 00000000000..68258a3bab1
--- /dev/null
+++ b/buildSrc/src/main/java/org/springframework/boot/build/EclipseConventions.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2012-2021 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.boot.build;
+
+import org.gradle.api.Project;
+import org.gradle.api.plugins.JavaBasePlugin;
+import org.gradle.plugins.ide.eclipse.EclipsePlugin;
+import org.gradle.plugins.ide.eclipse.model.EclipseModel;
+
+/**
+ * Conventions that are applied in the presence of the {@link JavaBasePlugin} in order to
+ * correctly configure Eclipse.
+ *
+ * @author Phillip Webb
+ */
+class EclipseConventions {
+
+	void apply(Project project) {
+		project.getPlugins().withType(JavaBasePlugin.class, (java) -> {
+			project.getPlugins().apply(EclipsePlugin.class);
+			EclipseModel eclipse = project.getExtensions().getByType(EclipseModel.class);
+			eclipse.getJdt().setJavaRuntimeName("JavaSE-1.8");
+		});
+	}
+
+}