build: file encoding import into Eclipse

See https://github.com/gradle/gradle/issues/898

5 files changed, 36 insertions, 3 deletions

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(',')
+                                }
                         }
                 }
         }