printer: remove 'addDescription' wrapper (#2933)

Author: IvanGoncharov

src/language/printer.js

@@ -106,64 +106,79 @@ const printDocASTReducer: any = {
 
   // Type System Definitions
 
-  SchemaDefinition: addDescription(({ directives, operationTypes }) =>
+  SchemaDefinition: ({ description, directives, operationTypes }) =>
+    wrap('', description, '\n') +
     join(['schema', join(directives, ' '), block(operationTypes)], ' '),
-  ),
 
   OperationTypeDefinition: ({ operation, type }) => operation + ': ' + type,
 
-  ScalarTypeDefinition: addDescription(({ name, directives }) =>
+  ScalarTypeDefinition: ({ description, name, directives }) =>
+    wrap('', description, '\n') +
     join(['scalar', name, join(directives, ' ')], ' '),
-  ),
-
-  ObjectTypeDefinition: addDescription(
-    ({ name, interfaces, directives, fields }) =>
-      join(
-        [
-          'type',
-          name,
-          wrap('implements ', join(interfaces, ' & ')),
-          join(directives, ' '),
-          block(fields),
-        ],
-        ' ',
-      ),
-  ),
-
-  FieldDefinition: addDescription(
-    ({ name, arguments: args, type, directives }) =>
-      name +
-      (hasMultilineItems(args)
-        ? wrap('(\n', indent(join(args, '\n')), '\n)')
-        : wrap('(', join(args, ', '), ')')) +
-      ': ' +
-      type +
-      wrap(' ', join(directives, ' ')),
-  ),
-
-  InputValueDefinition: addDescription(
-    ({ name, type, defaultValue, directives }) =>
-      join(
-        [name + ': ' + type, wrap('= ', defaultValue), join(directives, ' ')],
-        ' ',
-      ),
-  ),
-
-  InterfaceTypeDefinition: addDescription(
-    ({ name, interfaces, directives, fields }) =>
-      join(
-        [
-          'interface',
-          name,
-          wrap('implements ', join(interfaces, ' & ')),
-          join(directives, ' '),
-          block(fields),
-        ],
-        ' ',
-      ),
-  ),
-
-  UnionTypeDefinition: addDescription(({ name, directives, types }) =>
+
+  ObjectTypeDefinition: ({
+    description,
+    name,
+    interfaces,
+    directives,
+    fields,
+  }) =>
+    wrap('', description, '\n') +
+    join(
+      [
+        'type',
+        name,
+        wrap('implements ', join(interfaces, ' & ')),
+        join(directives, ' '),
+        block(fields),
+      ],
+      ' ',
+    ),
+
+  FieldDefinition: ({ description, name, arguments: args, type, directives }) =>
+    wrap('', description, '\n') +
+    name +
+    (hasMultilineItems(args)
+      ? wrap('(\n', indent(join(args, '\n')), '\n)')
+      : wrap('(', join(args, ', '), ')')) +
+    ': ' +
+    type +
+    wrap(' ', join(directives, ' ')),
+
+  InputValueDefinition: ({
+    description,
+    name,
+    type,
+    defaultValue,
+    directives,
+  }) =>
+    wrap('', description, '\n') +
+    join(
+      [name + ': ' + type, wrap('= ', defaultValue), join(directives, ' ')],
+      ' ',
+    ),
+
+  InterfaceTypeDefinition: ({
+    description,
+    name,
+    interfaces,
+    directives,
+    fields,
+  }) =>
+    wrap('', description, '\n') +
+    join(
+      [
+        'interface',
+        name,
+        wrap('implements ', join(interfaces, ' & ')),
+        join(directives, ' '),
+        block(fields),
+      ],
+      ' ',
+    ),
+
+  UnionTypeDefinition: ({ description, name, directives, types }) =>
+    wrap('', description, '\n') +
     join(
       [
         'union',
@@ -173,31 +188,34 @@ const printDocASTReducer: any = {
       ],
       ' ',
     ),
-  ),
 
-  EnumTypeDefinition: addDescription(({ name, directives, values }) =>
+  EnumTypeDefinition: ({ description, name, directives, values }) =>
+    wrap('', description, '\n') +
     join(['enum', name, join(directives, ' '), block(values)], ' '),
-  ),
 
-  EnumValueDefinition: addDescription(({ name, directives }) =>
-    join([name, join(directives, ' ')], ' '),
-  ),
+  EnumValueDefinition: ({ description, name, directives }) =>
+    wrap('', description, '\n') + join([name, join(directives, ' ')], ' '),
 
-  InputObjectTypeDefinition: addDescription(({ name, directives, fields }) =>
+  InputObjectTypeDefinition: ({ description, name, directives, fields }) =>
+    wrap('', description, '\n') +
     join(['input', name, join(directives, ' '), block(fields)], ' '),
-  ),
-
-  DirectiveDefinition: addDescription(
-    ({ name, arguments: args, repeatable, locations }) =>
-      'directive @' +
-      name +
-      (hasMultilineItems(args)
-        ? wrap('(\n', indent(join(args, '\n')), '\n)')
-        : wrap('(', join(args, ', '), ')')) +
-      (repeatable ? ' repeatable' : '') +
-      ' on ' +
-      join(locations, ' | '),
-  ),
+
+  DirectiveDefinition: ({
+    description,
+    name,
+    arguments: args,
+    repeatable,
+    locations,
+  }) =>
+    wrap('', description, '\n') +
+    'directive @' +
+    name +
+    (hasMultilineItems(args)
+      ? wrap('(\n', indent(join(args, '\n')), '\n)')
+      : wrap('(', join(args, ', '), ')')) +
+    (repeatable ? ' repeatable' : '') +
+    ' on ' +
+    join(locations, ' | '),
 
   SchemaExtension: ({ directives, operationTypes }) =>
     join(['extend schema', join(directives, ' '), block(operationTypes)], ' '),
@@ -247,10 +265,6 @@ const printDocASTReducer: any = {
     join(['extend input', name, join(directives, ' '), block(fields)], ' '),
 };
 
-function addDescription(cb) {
-  return (node) => join([node.description, cb(node)], '\n');
-}
-
 /**
  * Given maybeArray, print an empty string if it is null or empty, otherwise
  * print all items together separated by separator if provided