fix!: Export loopTypes from Blockly.blocks.loops (google#5900)

* refactor(blocks): Make loopTypes a Set

  This is likely to slightly improve performance, especially if there
  are many entries.

* refactor(blocks): Re-export individual block modules from Blockly.blocks.all

* fix!(blocks): Have blocks_compressed.js export Blockly.blocks.all

  Previously the value obtained by

      const blocks = require('blockly/blocks');  // Node.js

  or

      import blocks from 'blockly/blocks.js';  // ES Modules

  would be the block definitions dictionary (Blockly.Blocks).

  Change this so that it is instead the export object from
  Blockly.blocks.all.

  This means you can now access loopTypes via:

      import blocks from 'blockly/blocks.js';
      blocks.loops.loopTypes.add('my_loop_blocktype');

  This is a breaking change for any code which depended on the value
  that was exported by blocks_compressed.js.

BREAKING CHANGE: the exports provided by blocks_compressed.js (and
therefore by `import ... from 'blockly/blocks'`) have changed; see above.

blocks/all.js

@@ -11,13 +11,26 @@
 'use strict';
 
 goog.module('Blockly.blocks.all');
+goog.module.declareLegacyNamespace();
+
+const colour = goog.require('Blockly.blocks.colour');
+const lists = goog.require('Blockly.blocks.lists');
+const logic = goog.require('Blockly.blocks.logic');
+const loops = goog.require('Blockly.blocks.loops');
+const math = goog.require('Blockly.blocks.math');
+const procedures = goog.require('Blockly.blocks.procedures');
+const texts = goog.require('Blockly.blocks.texts');
+const variables = goog.require('Blockly.blocks.variables');
+const variablesDynamic = goog.require('Blockly.blocks.variablesDynamic');
+
+
+exports.colour = colour;
+exports.lists = lists;
+exports.logic = logic;
+exports.loops = loops;
+exports.math = math;
+exports.procedures = procedures;
+exports.texts = texts;
+exports.variables = variables;
+exports.variablesDynamic = variablesDynamic;
 
-goog.require('Blockly.blocks.colour');
-goog.require('Blockly.blocks.lists');
-goog.require('Blockly.blocks.logic');
-goog.require('Blockly.blocks.loops');
-goog.require('Blockly.blocks.math');
-goog.require('Blockly.blocks.procedures');
-goog.require('Blockly.blocks.texts');
-goog.require('Blockly.blocks.variables');
-goog.require('Blockly.blocks.variablesDynamic');

blocks/loops.js

@@ -287,21 +287,21 @@ Extensions.register(
  *
  * // If using the Blockly npm package and es6 import syntax:
  * import {loopTypes} from 'blockly/blocks';
- * loopTypes.push('custom_loop');
+ * loopTypes.add('custom_loop');
  *
  * // Else if using Closure Compiler and goog.modules:
  * const {loopTypes} = goog.require('Blockly.blocks.loops');
- * loopTypes.push('custom_loop');
+ * loopTypes.add('custom_loop');
  *
- * @type {!Array<string>}
+ * @type {!Set<string>}
  */
-const loopTypes = [
+const loopTypes = new Set([
   'controls_repeat',
   'controls_repeat_ext',
   'controls_forEach',
   'controls_for',
   'controls_whileUntil',
-];
+]);
 exports.loopTypes = loopTypes;
 
 /**
@@ -321,7 +321,7 @@ const CONTROL_FLOW_IN_LOOP_CHECK_MIXIN = {
   getSurroundLoop: function() {
     let block = this;
     do {
-      if (loopTypes.includes(block.type)) {
+      if (loopTypes.has(block.type)) {
         return block;
       }
       block = block.getSurroundParent();

scripts/gulpfiles/build_tasks.js

@@ -108,7 +108,7 @@ const chunks = [
   {
     name: 'blocks',
     entry: 'blocks/all.js',
-    exports: 'Blockly.Blocks',
+    exports: 'Blockly.blocks.all',
     importAs: 'BlocklyBlocks',
   },
   {
@@ -321,7 +321,7 @@ function chunkWrapper(chunk) {
   const cjsDeps = fileNames.map(f => `require(${f})`).join(', ');
   const browserDeps =
       chunk.dependencies.map(d => `root.${d.exports}`).join(', ');
-  const imports = chunk.dependencies.map(d => d.importAs).join(', ');
+  const factoryParams = chunk.dependencies.map(d => d.importAs).join(', ');
   return `// Do not edit this file; automatically generated.
 
 /* eslint-disable */
@@ -333,7 +333,7 @@ function chunkWrapper(chunk) {
   } else { // Browser
     root.${chunk.exports} = factory(${browserDeps});
   }
-}(this, function(${imports}) {
+}(this, function(${factoryParams}) {
 ${chunk.factoryPreamble || FACTORY_PREAMBLE}
 %output%
 ${chunk.factoryPostamble || FACTORY_POSTAMBLE}