Allow listy configuration keys to use = to force a list to a single value

src/core/lombok/core/configuration/ConfigurationApp.java

@@ -245,7 +245,8 @@ public class ConfigurationApp extends LombokApp {
 		} else if (value instanceof List<?>) {
 			List<?> list = (List<?>)value;
 			if (list.isEmpty()) out.printf("clear %s%n", key.getKeyName());
-			for (Object element : list) out.printf("%s += %s%n", key.getKeyName(), element);
+			else if (list.size() == 1) out.printf("%s = %s%n", key.getKeyName(), list.get(0));
+			else for (Object element : list) out.printf("%s += %s%n", key.getKeyName(), element);
 		} else {
 			out.printf("%s = %s%n", key.getKeyName(), value);
 		}

src/core/lombok/core/configuration/ConfigurationParser.java

@@ -103,10 +103,6 @@ public class ConfigurationParser {
 				reporter.report(context.description(), "'" + keyName + "' is not a list and doesn't support " + operator + " (only = and clear)", lineNumber, line);
 				continue;
 			}
-			if (operator.equals("=") && type.isList()) {
-				reporter.report(context.description(), "'" + keyName + "' is a list and cannot be assigned to (use +=, -= and clear instead)", lineNumber, line);
-				continue;
-			}
 			
 			Object value = null;
 			if (stringValue != null) try {
@@ -119,7 +115,13 @@ public class ConfigurationParser {
 			if (operator.equals("clear")) {
 				collector.clear(key, context, lineNumber);
 			} else if (operator.equals("=")) {
-				collector.set(key, value, context, lineNumber);
+				if (type.isList()) {
+					collector.clear(key, context, lineNumber);
+					collector.add(key, value, context, lineNumber);
+				}
+				else {
+					collector.set(key, value, context, lineNumber);
+				}
 			} else if (operator.equals("+=")) {
 				collector.add(key, value, context, lineNumber);
 			} else {

test/configuration/resource/configurationRoot/d1/d11/d111/directory/setlist/lombok.config

@@ -0,0 +1 @@
+lombok.accessors.prefix = r_

test/configuration/resource/configurationRoot/out.txt

@@ -11,7 +11,7 @@ lombok.accessors.chain = false
 #    3: lombok.accessors.chain = false
 
 # Strip this field prefix, like 'f' or 'm_', from the names of generated getters, setters, and with-ers.
-lombok.accessors.prefix += f
+lombok.accessors.prefix = f
 # BASE/d1/d11/lombok.config (stopped bubbling):
 #    5: lombok.accessors.prefix += f
 
@@ -28,7 +28,7 @@ clear lombok.anyConstructor.addConstructorProperties
 clear lombok.log.fieldName
 
 # Copy these annotations to getters, setters, with methods, builder-setters, etc.
-lombok.copyableAnnotations += copy1
+lombok.copyableAnnotations = copy1
 # BASE/d1/d11/lombok.config (stopped bubbling):
 #    7: lombok.copyableAnnotations += copy1
 
@@ -94,7 +94,80 @@ lombok.anyConstructor.addConstructorProperties = true
 clear lombok.log.fieldName
 
 # Copy these annotations to getters, setters, with methods, builder-setters, etc.
-lombok.copyableAnnotations += copy2
+lombok.copyableAnnotations = copy2
+# BASE/d1/d11/lombok.config (stopped bubbling):
+#    7: lombok.copyableAnnotations += copy1
+# 
+# BASE/archives/a2.zip!reset.config (imported from BASE/d1/d11/d111/lombok.config:2):
+#    1: clear lombok.copyableAnnotations
+# 
+# BASE/d1/d11/d111/lombok.config:
+#    5: lombok.copyableAnnotations += copy2
+
+# Generate some style of null annotation for generated code where this is relevant. (default: none).
+clear lombok.addNullAnnotations
+
+
+Configuration for 'BASE/d1/d11/d111/directory/setlist'.
+
+# Emit a warning or error if @Accessors is used.
+lombok.accessors.flagUsage = ERROR
+# BASE/d1/d11/lombok.config (stopped bubbling):
+#    4: lombok.accessors.flagUsage = ERROR
+
+# Generate setters that return 'this' instead of 'void' (default: false).
+clear lombok.accessors.chain
+# BASE/d1/d11/lombok.config (stopped bubbling):
+#    3: lombok.accessors.chain = false
+# 
+# BASE/d1/d11/d111/lombok.config:
+#    3: clear lombok.accessors.chain
+
+# Strip this field prefix, like 'f' or 'm_', from the names of generated getters, setters, and with-ers.
+lombok.accessors.prefix = r_
+# BASE/d1/d11/lombok.config (stopped bubbling):
+#    5: lombok.accessors.prefix += f
+# 
+# BASE/e1/environment.config (imported from BASE/d1/d11/d111/import1.config:6):
+#    1: lombok.accessors.prefix += e_
+# 
+# BASE/home/home.config (imported from BASE/d1/d11/d111/import1.config:7):
+#    1: lombok.accessors.prefix += h_
+# 
+# BASE/d1/d11/d111/import1.config (imported from BASE/d1/d11/d111/lombok.config:1):
+#    8: lombok.accessors.prefix += z_
+#    9: lombok.accessors.prefix += f
+# 
+# BASE/d1/d11/d111/lombok.config:
+#    4: lombok.accessors.prefix += m_
+# 
+# BASE/d1/d11/d111/directory/lombok.config:
+#    1: lombok.accessors.prefix += x_
+# 
+# BASE/d1/d11/d111/directory/setlist/lombok.config:
+#    1: clear lombok.accessors.prefix
+#    1: lombok.accessors.prefix += r_
+
+# Generate @javax.annotation.Generated on all generated code (default: false). Deprecated, use 'lombok.addJavaxGeneratedAnnotation' instead.
+lombok.addGeneratedAnnotation = true
+# BASE/archives/a1.jar!d1/include.config (imported from BASE/archives/a1.jar!lombok.config:1) (stopped bubbling):
+#    4: lombok.addGeneratedAnnotation = true
+
+# Generate @javax.annotation.Generated on all generated code (default: follow lombok.addGeneratedAnnotation).
+lombok.addJavaxGeneratedAnnotation = true
+# BASE/archives/a1.jar!d2/include.config (imported from BASE/archives/a1.jar!d1/include.config:1) (stopped bubbling):
+#    1: lombok.addJavaxGeneratedAnnotation = true
+
+# Generate @ConstructorProperties for generated constructors (default: false).
+lombok.anyConstructor.addConstructorProperties = true
+# BASE/archives/a1.jar!lombok.config (imported from BASE/d1/d11/d111/import1.config:4) (stopped bubbling):
+#    3: lombok.anyConstructor.addConstructorProperties = true
+
+# Use this name for the generated logger fields (default: 'log').
+clear lombok.log.fieldName
+
+# Copy these annotations to getters, setters, with methods, builder-setters, etc.
+lombok.copyableAnnotations = copy2
 # BASE/d1/d11/lombok.config (stopped bubbling):
 #    7: lombok.copyableAnnotations += copy1
 # 

test/configuration/src/lombok/core/configuration/TestConfiguration.java

@@ -45,7 +45,14 @@ public class TestConfiguration {
 		String baseName = "test/configuration/resource/configurationRoot/";
 		File directory = new File(baseName);
 		String normalizedName = new File(directory.getAbsoluteFile().toURI().normalize()).toString().replace('\\', '/') + "/";
-		Collection<String> paths = Arrays.asList(normalizedName + "d1/d11", normalizedName + "d1/d12", normalizedName + "d1/d11/d111", normalizedName + "d1/d11/d111/f1.txt", normalizedName + "features/annotations");
+		Collection<String> paths = Arrays.asList(
+			normalizedName + "d1/d11",
+			normalizedName + "d1/d12",
+			normalizedName + "d1/d11/d111",
+			normalizedName + "d1/d11/d111/f1.txt",
+			normalizedName + "d1/d11/d111/directory/setlist",
+			normalizedName + "features/annotations"
+		);
 		
 		ByteArrayOutputStream rawOut = new ByteArrayOutputStream();
 		ByteArrayOutputStream rawErr = new ByteArrayOutputStream();