From c1f0da324605c18caf137631e58878136a707df4 Mon Sep 17 00:00:00 2001
From: Kristóf Marussy <kristof@marussy.com>
Date: Thu, 28 Jul 2022 15:30:10 +0200
Subject: build: file encoding import into Eclipse

See https://github.com/gradle/gradle/issues/898
---
 buildSrc/src/main/groovy/refinery-eclipse.gradle   | 28 ++++++++++++++++++++++
 .../main/groovy/refinery-frontend-workspace.gradle |  1 +
 .../main/groovy/refinery-java-conventions.gradle   |  2 +-
 .../main/groovy/refinery-java-test-fixtures.gradle |  4 +++-
 buildSrc/src/main/groovy/refinery-jmh.gradle       |  4 +++-
 5 files changed, 36 insertions(+), 3 deletions(-)
 create mode 100644 buildSrc/src/main/groovy/refinery-eclipse.gradle

(limited to 'buildSrc/src')

diff --git a/buildSrc/src/main/groovy/refinery-eclipse.gradle b/buildSrc/src/main/groovy/refinery-eclipse.gradle
new file mode 100644
index 00000000..ddd15fc2
--- /dev/null
+++ b/buildSrc/src/main/groovy/refinery-eclipse.gradle
@@ -0,0 +1,28 @@
+plugins {
+	id 'eclipse'
+}
+
+// Workaround from https://github.com/gradle/gradle/issues/898#issuecomment-885765821
+def eclipseResourceEncoding = tasks.register('eclipseResourceEncoding') {
+	ext.outputFile = file('.settings/org.eclipse.core.resources.prefs')
+    def compileTask = tasks.findByName('compileJava')
+    ext.encoding = provider({ compileTask?.options?.encoding }).orElse(providers.systemProperty('file.encoding'))
+
+    inputs.property("file.encoding", encoding)
+    outputs.file(outputFile).withPropertyName('outputFile')
+
+    doLast {
+        Properties eclipseEncodingProperties = new Properties(Collections.singletonMap('eclipse.preferences.version','1'))
+        eclipseEncodingProperties.put('encoding/<project>', encoding.get())
+        outputFile.withOutputStream {
+        	eclipseEncodingProperties.store(it, 'generated by ' + name)
+        }
+        eclipseEncodingProperties.list(System.out)
+    }
+}
+
+tasks.named('eclipse') {
+	dependsOn(eclipseResourceEncoding)
+}
+
+eclipse.synchronizationTasks(eclipseResourceEncoding)
diff --git a/buildSrc/src/main/groovy/refinery-frontend-workspace.gradle b/buildSrc/src/main/groovy/refinery-frontend-workspace.gradle
index 35410db4..9c6d7b13 100644
--- a/buildSrc/src/main/groovy/refinery-frontend-workspace.gradle
+++ b/buildSrc/src/main/groovy/refinery-frontend-workspace.gradle
@@ -1,4 +1,5 @@
 plugins {
+	id 'refinery-eclipse'
 	id 'refinery-frontend-conventions'
 }
 
diff --git a/buildSrc/src/main/groovy/refinery-java-conventions.gradle b/buildSrc/src/main/groovy/refinery-java-conventions.gradle
index 5bc73f61..bbdaa86c 100644
--- a/buildSrc/src/main/groovy/refinery-java-conventions.gradle
+++ b/buildSrc/src/main/groovy/refinery-java-conventions.gradle
@@ -1,7 +1,7 @@
 plugins {
-	id 'eclipse'
 	id 'jacoco'
 	id 'java'
+	id 'refinery-eclipse'
 }
 
 repositories {
diff --git a/buildSrc/src/main/groovy/refinery-java-test-fixtures.gradle b/buildSrc/src/main/groovy/refinery-java-test-fixtures.gradle
index 326fa868..693cba98 100644
--- a/buildSrc/src/main/groovy/refinery-java-test-fixtures.gradle
+++ b/buildSrc/src/main/groovy/refinery-java-test-fixtures.gradle
@@ -24,7 +24,9 @@ eclipse.classpath {
 				if (hasTest && usedBy.contains('testFixtures')) {
 					usedBy += 'test'
 				}
-				entry.entryAttributes['gradle_used_by_scope'] = usedBy.join(',')
+				if (!usedBy.empty) {
+					entry.entryAttributes['gradle_used_by_scope'] = usedBy.join(',')
+				}
 			}
 		}
 	}
diff --git a/buildSrc/src/main/groovy/refinery-jmh.gradle b/buildSrc/src/main/groovy/refinery-jmh.gradle
index 17654463..fada4fb3 100644
--- a/buildSrc/src/main/groovy/refinery-jmh.gradle
+++ b/buildSrc/src/main/groovy/refinery-jmh.gradle
@@ -47,7 +47,9 @@ eclipse.classpath.file.whenMerged { classpath ->
 					// main and test sources are also used by jmh sources.
 					usedBy += 'jmh'
 				}
-				entry.entryAttributes['gradle_used_by_scope'] = usedBy.join(',')
+				if (!usedBy.empty) {
+					entry.entryAttributes['gradle_used_by_scope'] = usedBy.join(',')
+				}
 			}
 		}
 	}
-- 
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