Normalize exports (#339)

Make all the files have a single module.exports call at the end of the file.

I added a missing `"use strict";` and removed a few unused functions from utils at the same time.

src/comments.js

@@ -118,7 +118,7 @@ function decorateComment(node, comment, text) {
   }
 }
 
-exports.attach = function(comments, ast, text) {
+function attach(comments, ast, text) {
   if (!isArray.check(comments)) {
     return;
   }
@@ -281,9 +281,8 @@ function printDanglingComments(path, print, options) {
   }, "comments");
   return concat(parts);
 }
-exports.printDanglingComments = printDanglingComments;
 
-exports.printComments = function(path, print, options) {
+function printComments(path, print, options) {
   var value = path.getValue();
   var parent = path.getParentNode();
   var printed = print(path);
@@ -331,3 +330,9 @@ exports.printComments = function(path, print, options) {
   leadingParts.push.apply(leadingParts, trailingParts);
   return concat(leadingParts);
 };
+
+module.exports = {
+  attach,
+  printComments,
+  printDanglingComments,
+}

src/fast-path.js

@@ -12,7 +12,6 @@ function FastPath(value) {
 }
 
 var FPp = FastPath.prototype;
-module.exports = FastPath;
 
 // Static convenience function for coercing a value to a FastPath.
 FastPath.from = function(obj) {
@@ -507,3 +506,5 @@ FPp.firstInStatement = function() {
 
   return true;
 };
+
+module.exports = FastPath;

src/options.js

@@ -1,3 +1,5 @@
+"use strict";
+
 var defaults = {
   // Number of spaces the pretty-printer should use per tab
   tabWidth: 2,
@@ -12,7 +14,7 @@ var defaults = {
 };
 
 // Copy options and fill in default values.
-exports.normalize = function(options) {
+function normalize(options) {
   const normalized = Object.assign({}, options || {});
   Object.keys(defaults).forEach(k => {
     if (normalized[k] == null) {
@@ -21,3 +23,7 @@ exports.normalize = function(options) {
   });
   return normalized;
 };
+
+module.exports = {
+  normalize
+};

src/util.js

@@ -1,34 +1,11 @@
 "use strict";
 var assert = require("assert");
 var types = require("ast-types");
-var getFieldValue = types.getFieldValue;
 var n = types.namedTypes;
-var hasOwn = Object.prototype.hasOwnProperty;
-var util = exports;
-
-function getUnionOfKeys() {
-  var result = {};
-  var argc = arguments.length;
-  for (var i = 0; i < argc; ++i) {
-    var keys = Object.keys(arguments[i]);
-    var keyCount = keys.length;
-    for (var j = 0; j < keyCount; ++j) {
-      result[keys[j]] = true;
-    }
-  }
-  return result;
-}
-util.getUnionOfKeys = getUnionOfKeys;
 
 function comparePos(pos1, pos2) {
   return pos1.line - pos2.line || pos1.column - pos2.column;
 }
-util.comparePos = comparePos;
-
-function copyPos(pos) {
-  return { line: pos.line, column: pos.column };
-}
-util.copyPos = copyPos;
 
 function expandLoc(parentNode, childNode) {
   if (locStart(childNode) - locStart(parentNode) < 0) {
@@ -40,14 +17,14 @@ function expandLoc(parentNode, childNode) {
   }
 }
 
-util.fixFaultyLocations = function(node, text) {
+function fixFaultyLocations(node, text) {
   if (node.decorators) {
     // Expand the loc of the node responsible for printing the decorators
     // (here, the decorated node) so that it includes node.decorators.
     node.decorators.forEach(function(decorator) {
       expandLoc(node, decorator);
     });
-  } else if (node.declaration && util.isExportDeclaration(node)) {
+  } else if (node.declaration && isExportDeclaration(node)) {
     // Expand the loc of the node responsible for printing the decorators
     // (here, the export declaration) so that it includes node.decorators.
     var decorators = node.declaration.decorators;
@@ -77,7 +54,7 @@ util.fixFaultyLocations = function(node, text) {
   }
 };
 
-util.isExportDeclaration = function(node) {
+function isExportDeclaration(node) {
   if (node) switch (node.type) {
       case "ExportDeclaration":
       case "ExportDefaultDeclaration":
@@ -91,10 +68,10 @@ util.isExportDeclaration = function(node) {
   return false;
 };
 
-util.getParentExportDeclaration = function(path) {
+function getParentExportDeclaration(path) {
   var parentNode = path.getParentNode();
   if (
-    path.getName() === "declaration" && util.isExportDeclaration(parentNode)
+    path.getName() === "declaration" && isExportDeclaration(parentNode)
   ) {
     return parentNode;
   }
@@ -102,15 +79,7 @@ util.getParentExportDeclaration = function(path) {
   return null;
 };
 
-util.isTrailingCommaEnabled = function(options, context) {
-  var trailingComma = options.trailingComma;
-  if (typeof trailingComma === "object") {
-    return !!trailingComma[context];
-  }
-  return !!trailingComma;
-};
-
-util.getLast = function(arr) {
+function getLast(arr) {
   if (arr.length > 0) {
     return arr[arr.length - 1];
   }
@@ -134,7 +103,7 @@ function skipNewLineForward(text, index) {
   return index;
 }
 
-function _findNewline(text, index, backwards) {
+function findNewline(text, index, backwards) {
   const length = text.length;
   let cursor = backwards ? index - 1 : skipNewLineForward(text, index);
   // Look forward and see if there is a newline after/before this code
@@ -152,12 +121,12 @@ function _findNewline(text, index, backwards) {
   return false;
 }
 
-util.newlineExistsBefore = function(text, index) {
-  return _findNewline(text, index, true);
+function newlineExistsBefore(text, index) {
+  return findNewline(text, index, true);
 };
 
-util.newlineExistsAfter = function(text, index) {
-  return _findNewline(text, index);
+function newlineExistsAfter(text, index) {
+  return findNewline(text, index);
 };
 
 function skipSpaces(text, index, backwards) {
@@ -175,7 +144,6 @@ function skipSpaces(text, index, backwards) {
   }
   return false;
 }
-util.skipSpaces = skipSpaces;
 
 function locStart(node) {
   if (node.range) {
@@ -183,7 +151,6 @@ function locStart(node) {
   }
   return node.start;
 }
-util.locStart = locStart;
 
 function locEnd(node) {
   if (node.range) {
@@ -191,7 +158,6 @@ function locEnd(node) {
   }
   return node.end;
 }
-util.locEnd = locEnd;
 
 function setLocStart(node, index) {
   if (node.range) {
@@ -200,7 +166,6 @@ function setLocStart(node, index) {
     node.start = index;
   }
 }
-util.setLocStart = setLocStart;
 
 function setLocEnd(node, index) {
   if (node.range) {
@@ -209,7 +174,6 @@ function setLocEnd(node, index) {
     node.end = index;
   }
 }
-util.setLocEnd = setLocEnd;
 
 // http://stackoverflow.com/a/7124052
 function htmlEscapeInsideDoubleQuote(str) {
@@ -220,7 +184,6 @@ function htmlEscapeInsideDoubleQuote(str) {
   //    .replace(/</g, '&lt;')
   //    .replace(/>/g, '&gt;');
 }
-util.htmlEscapeInsideDoubleQuote = htmlEscapeInsideDoubleQuote;
 
 // http://stackoverflow.com/a/7124052
 function htmlEscapeInsideAngleBracket(str) {
@@ -231,7 +194,6 @@ function htmlEscapeInsideAngleBracket(str) {
   //    .replace(/"/g, '&quot;')
   //    .replace(/'/g, '&#39;')
 }
-util.htmlEscapeInsideAngleBracket = htmlEscapeInsideAngleBracket;
 
 var PRECEDENCE = {};
 [
@@ -251,6 +213,24 @@ var PRECEDENCE = {};
   });
 });
 
-util.getPrecedence = function(op) {
+function getPrecedence(op) {
   return PRECEDENCE[op];
 };
+
+module.exports = {
+  comparePos,
+  getPrecedence,
+  fixFaultyLocations,
+  isExportDeclaration,
+  getParentExportDeclaration,
+  getLast,
+  newlineExistsBefore,
+  newlineExistsAfter,
+  skipSpaces,
+  locStart,
+  locEnd,
+  setLocStart,
+  setLocEnd,
+  htmlEscapeInsideDoubleQuote,
+  htmlEscapeInsideAngleBracket
+};