Load dependency graph from tests/deps.js in uncompiled mode

* New gulp task buildDeps (npm run build:deps) to create tests/deps.js.
* Old gulp task buildUncompressed is deleted.
* blockly_uncompressed.js is now handwritten.
  * And simplified; in particular, BLOCKLY_BOOT is gone.
  * And linted!
* For consistency with the Closure documentation and base.js,
  consistently refer to what blockly_uncompressed.js is used for as
  "uncompiled mode" rather than "uncompressed mode" (but don't yet
  rename it to blockly_uncompiled.js)

scripts/gulpfiles/build_tasks.js

@@ -330,84 +330,21 @@ const buildGenerators = gulp.parallel(
 );
 
 /**
- * This task builds Blockly's uncompressed file.
- *     blockly_uncompressed.js
+ * This task updates tests/deps.js, used by blockly_uncompressed.js
+ * when loading Blockly in uncompiled mode.
  */
-function buildUncompressed() {
+function buildDeps(done) {
   const closurePath = argv.closureLibrary ?
-    'node_modules/google-closure-library/closure/goog' :
-    'closure/goog';
-  const header = `// Do not edit this file; automatically generated by gulp.
-'use strict';
-
-this.IS_NODE_JS = !!(typeof module !== 'undefined' && module.exports);
-
-this.BLOCKLY_DIR = (function(root) {
-  if (!root.IS_NODE_JS) {
-    // Find name of current directory.
-    var scripts = document.getElementsByTagName('script');
-    var re = new RegExp('(.+)[\\\/]blockly_(.*)uncompressed\\\.js$');
-    for (var i = 0, script; script = scripts[i]; i++) {
-      var match = re.exec(script.src);
-      if (match) {
-        return match[1];
-      }
-    }
-    alert('Could not detect Blockly\\'s directory name.');
-  }
-  return '';
-})(this);
-
-this.BLOCKLY_BOOT = function(root) {
-  // Execute after Closure has loaded.
-`;
-  const footer = `
-delete root.BLOCKLY_DIR;
-delete root.BLOCKLY_BOOT;
-delete root.IS_NODE_JS;
-};
-
-if (this.IS_NODE_JS) {
-  this.BLOCKLY_BOOT(this);
-  module.exports = Blockly;
-} else {
-  document.write('<script src="' + this.BLOCKLY_DIR +
-      '/${closurePath}/base.js"></script>');
-  document.write('<script>this.BLOCKLY_BOOT(this);</script>');
-}
-`;
-
-let deps = [];
-return gulp.src(maybeAddClosureLibrary(['core/**/**/*.js']))
-  .pipe(through2.obj((file, _enc, cb) => {
-    const result = closureDeps.parser.parseFile(file.path);
-    for (const dep of result.dependencies) {
-      deps.push(dep);
-    }
-    cb(null);
-  }))
-  .on('end', () => {
-    // Update the path to closure for any files that we don't know the full path
-    // of (parsed from a goog.addDependency call).
-    for (const dep of deps) {
-      dep.setClosurePath(closurePath);
-    }
-
-    const addDependency = closureDeps.depFile
-        .getDepFileText(closurePath, deps)
-        .replace(/\\/g, '\/');
-
-    const requires = `goog.addDependency("base.js", [], []);
-
-// Load Blockly.
-goog.require('Blockly.requires');
-`;
-    fs.writeFileSync('blockly_uncompressed.js',
-      header +
-      addDependency +
-      requires +
-      footer);
-  });
+      'node_modules/google-closure-library/closure/goog' :
+      'closure/goog';
+  const roots = [
+    closurePath,
+    'core',
+    'blocks',
+  ];
+  const args = roots.map(root => `--root '${root}' `).join('');
+  execSync(`closure-make-deps ${args} > tests/deps.js`, {stdio: 'inherit'});
+  done();
 };
 
 /**
@@ -517,10 +454,10 @@ function buildAdvancedCompilationTest() {
  *     blockly_uncompressed.js
  */
 const buildCore = gulp.parallel(
-  buildCompressed,
-  buildBlocks,
-  buildUncompressed
-);
+    buildDeps,
+    buildCompressed,
+    buildBlocks,
+    );
 
 /**
  * This task builds all of Blockly:
@@ -535,10 +472,10 @@ const buildCore = gulp.parallel(
  *     msg/json/*.js
  */
 const build = gulp.parallel(
-  buildCore,
-  buildGenerators,
-  buildLangfiles
-);
+    buildCore,
+    buildGenerators,
+    buildLangfiles,
+    );
 
 /**
  * This task copies built files from BUILD_DIR back to the repository
@@ -566,11 +503,11 @@ function cleanBuildDir(done) {
 
 module.exports = {
   build: build,
+  deps: buildDeps,
   core: buildCore,
   blocks: buildBlocks,
   generateLangfiles: generateLangfiles,
   langfiles: buildLangfiles,
-  uncompressed: buildUncompressed,
   compressed: buildCompressed,
   generators: buildGenerators,
   checkinBuilt: checkinBuilt,