refactor(ivy): migrate ɵɵ prefix back to Δ (angular#30362)

Now that issues are resolved with Closure compiler, we can move back to our desired prefix of `Δ`.

PR Close angular#30362

Author: benlesh

aio/content/guide/deprecations.md

@@ -74,7 +74,7 @@ module.exports = new Package('angular-api', [basePackage, typeScriptPackage])
 
     // API files are typescript
     readTypeScriptModules.basePath = API_SOURCE_PATH;
-    readTypeScriptModules.ignoreExportsMatching = [/^_|^ɵɵ|^VERSION$/];
+    readTypeScriptModules.ignoreExportsMatching = [/^_|^Δ|^VERSION$/];
     readTypeScriptModules.hidePrivateMembers = true;
 
     // NOTE: This list should be in sync with tools/public_api_guard/BUILD.bazel

aio/tools/transforms/angular-api-package/index.js

@@ -37,7 +37,7 @@ We explicitly don't consider the following to be our public API surface:
 
 - any file/import paths within our package except for the `/`, `/testing` and `/bundles/*` and other documented package entry-points.
 - constructors of injectable classes (services and directives) - please use DI to obtain instances of these classes
-- any class members or symbols marked as `private`, or prefixed with underscore (`_`), [barred latin o](https://en.wikipedia.org/wiki/%C6%9F) (`ɵ`), and  [double barred latin o](https://en.wikipedia.org/wiki/%C6%9F) (`ɵɵ`).
+- any class members or symbols marked as `private`, or prefixed with underscore (`_`), [barred latin o](https://en.wikipedia.org/wiki/%C6%9F) (`ɵ`), and  [greek delta](https://en.wikipedia.org/wiki/Delta_(letter)) (`Δ`).
 - extending any of our classes unless the support for this is specifically documented in the API docs
 - the contents and API surface of the code generated by Angular's compiler (with one notable exception: the existence and name of `NgModuleFactory` instances exported from generated code is guaranteed)
 

docs/PUBLIC_API.md

@@ -40,25 +40,25 @@ if [[ $? != 0 ]]; then exit 1; fi
   if [[ $? != 0 ]]; then exit 1; fi
 
 # Did it compile @angular/core/ApplicationModule correctly?
-  grep "ApplicationModule.ngModuleDef = ɵɵdefineNgModule" node_modules/@angular/core/fesm2015/core.js
+  grep "ApplicationModule.ngModuleDef = ΔdefineNgModule" node_modules/@angular/core/fesm2015/core.js
   if [[ $? != 0 ]]; then exit 1; fi
-  grep "ApplicationModule.ngModuleDef = ɵɵdefineNgModule" node_modules/@angular/core/fesm5/core.js
+  grep "ApplicationModule.ngModuleDef = ΔdefineNgModule" node_modules/@angular/core/fesm5/core.js
   if [[ $? != 0 ]]; then exit 1; fi
-  grep "ApplicationModule.ngModuleDef = ɵngcc0.ɵɵdefineNgModule" node_modules/@angular/core/esm2015/src/application_module.js
+  grep "ApplicationModule.ngModuleDef = ɵngcc0.ΔdefineNgModule" node_modules/@angular/core/esm2015/src/application_module.js
   if [[ $? != 0 ]]; then exit 1; fi
-  grep "ApplicationModule.ngModuleDef = ɵngcc0.ɵɵdefineNgModule" node_modules/@angular/core/esm5/src/application_module.js
+  grep "ApplicationModule.ngModuleDef = ɵngcc0.ΔdefineNgModule" node_modules/@angular/core/esm5/src/application_module.js
   if [[ $? != 0 ]]; then exit 1; fi
 
 # Did it transform @angular/core typing files correctly?
   grep "import [*] as ɵngcc0 from './src/r3_symbols';" node_modules/@angular/core/core.d.ts
   if [[ $? != 0 ]]; then exit 1; fi
-  grep "static ngInjectorDef: ɵngcc0.ɵɵInjectorDef<ApplicationModule>;" node_modules/@angular/core/core.d.ts
+  grep "static ngInjectorDef: ɵngcc0.ΔInjectorDef<ApplicationModule>;" node_modules/@angular/core/core.d.ts
   if [[ $? != 0 ]]; then exit 1; fi
 
 # Did it generate a base factory call for synthesized constructors correctly?
-  grep "const ɵMatTable_BaseFactory = ɵngcc0.ɵɵgetInheritedFactory(MatTable);" node_modules/@angular/material/esm2015/table.js
+  grep "const ɵMatTable_BaseFactory = ɵngcc0.ΔgetInheritedFactory(MatTable);" node_modules/@angular/material/esm2015/table.js
   if [[ $? != 0 ]]; then exit 1; fi
-  grep "const ɵMatTable_BaseFactory = ɵngcc0.ɵɵgetInheritedFactory(MatTable);" node_modules/@angular/material/esm5/table.es5.js
+  grep "const ɵMatTable_BaseFactory = ɵngcc0.ΔgetInheritedFactory(MatTable);" node_modules/@angular/material/esm5/table.es5.js
   if [[ $? != 0 ]]; then exit 1; fi
 
 # Can it be safely run again (as a noop)?

integration/ngcc/test.sh

@@ -6,7 +6,7 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-import {ɵRenderFlags, ɵrenderComponent as renderComponent, ɵɵcontainer, ɵɵcontainerRefreshEnd, ɵɵcontainerRefreshStart, ɵɵdefineComponent, ɵɵelementEnd, ɵɵelementStart, ɵɵembeddedViewEnd, ɵɵembeddedViewStart, ɵɵinterpolation1, ɵɵselect, ɵɵstyleProp, ɵɵstyling, ɵɵtext, ɵɵtextBinding} from '@angular/core';
+import {ɵRenderFlags, ɵrenderComponent as renderComponent, Δcontainer, ΔcontainerRefreshEnd, ΔcontainerRefreshStart, ΔdefineComponent, ΔelementEnd, ΔelementStart, ΔembeddedViewEnd, ΔembeddedViewStart, Δinterpolation1, Δselect, ΔstyleProp, Δstyling, Δtext, ΔtextBinding} from '@angular/core';
 
 import {bindAction, profile} from '../../util';
 import {createDom, destroyDom, detectChanges} from '../render3/tree';
@@ -18,7 +18,7 @@ export class TreeFunction {
   data: TreeNode = emptyTree;
 
   /** @nocollapse */
-  static ngComponentDef = ɵɵdefineComponent({
+  static ngComponentDef = ΔdefineComponent({
     type: TreeFunction,
     selectors: [['tree']],
     consts: 5,
@@ -35,41 +35,41 @@ export class TreeFunction {
 const c1 = ['background-color'];
 export function TreeTpl(rf: ɵRenderFlags, ctx: TreeNode) {
   if (rf & ɵRenderFlags.Create) {
-    ɵɵelementStart(0, 'tree');
+    ΔelementStart(0, 'tree');
     {
-      ɵɵelementStart(1, 'span');
-      ɵɵstyling(null, c1);
-      { ɵɵtext(2); }
-      ɵɵelementEnd();
-      ɵɵcontainer(3);
-      ɵɵcontainer(4);
+      ΔelementStart(1, 'span');
+      Δstyling(null, c1);
+      { Δtext(2); }
+      ΔelementEnd();
+      Δcontainer(3);
+      Δcontainer(4);
     }
-    ɵɵelementEnd();
+    ΔelementEnd();
   }
   if (rf & ɵRenderFlags.Update) {
-    ɵɵselect(1);
-    ɵɵstyleProp(0, ctx.depth % 2 ? '' : 'grey');
-    ɵɵstyling();
-    ɵɵselect(2);
-    ɵɵtextBinding(2, ɵɵinterpolation1(' ', ctx.value, ' '));
-    ɵɵcontainerRefreshStart(3);
+    Δselect(1);
+    ΔstyleProp(0, ctx.depth % 2 ? '' : 'grey');
+    Δstyling();
+    Δselect(2);
+    ΔtextBinding(2, Δinterpolation1(' ', ctx.value, ' '));
+    ΔcontainerRefreshStart(3);
     {
       if (ctx.left != null) {
-        let rf0 = ɵɵembeddedViewStart(0, 5, 1);
+        let rf0 = ΔembeddedViewStart(0, 5, 1);
         { TreeTpl(rf0, ctx.left); }
-        ɵɵembeddedViewEnd();
+        ΔembeddedViewEnd();
       }
     }
-    ɵɵcontainerRefreshEnd();
-    ɵɵcontainerRefreshStart(4);
+    ΔcontainerRefreshEnd();
+    ΔcontainerRefreshStart(4);
     {
       if (ctx.right != null) {
-        let rf0 = ɵɵembeddedViewStart(0, 5, 1);
+        let rf0 = ΔembeddedViewStart(0, 5, 1);
         { TreeTpl(rf0, ctx.right); }
-        ɵɵembeddedViewEnd();
+        ΔembeddedViewEnd();
       }
     }
-    ɵɵcontainerRefreshEnd();
+    ΔcontainerRefreshEnd();
   }
 }
 

modules/benchmarks/src/tree/render3_function/index.ts

@@ -5,7 +5,7 @@
  * Use of this source code is governed by an MIT-style license that can be
  * found in the LICENSE file at https://angular.io/license
  */
-import {Directive, DoCheck, Input, ɵRenderFlags, ɵɵclassMap, ɵɵdefineDirective, ɵɵstyling, ɵɵstylingApply} from '@angular/core';
+import {Directive, DoCheck, Input, ɵRenderFlags, ΔclassMap, ΔdefineDirective, Δstyling, ΔstylingApply} from '@angular/core';
 
 import {NgClassImpl, NgClassImplProvider} from './ng_class_impl';
 
@@ -29,17 +29,17 @@ export const ngClassDirectiveDef__PRE_R3__ = undefined;
 // used when the VE is not present (note the directive will
 // never be instantiated normally because it is apart of a
 // base class)
-export const ngClassDirectiveDef__POST_R3__ = ɵɵdefineDirective({
+export const ngClassDirectiveDef__POST_R3__ = ΔdefineDirective({
   type: function() {} as any,
   selectors: null as any,
   factory: () => {},
   hostBindings: function(rf: ɵRenderFlags, ctx: any, elIndex: number) {
     if (rf & ɵRenderFlags.Create) {
-      ɵɵstyling();
+      Δstyling();
     }
     if (rf & ɵRenderFlags.Update) {
-      ɵɵclassMap(ctx.getValue());
-      ɵɵstylingApply();
+      ΔclassMap(ctx.getValue());
+      ΔstylingApply();
     }
   }
 });

packages/common/src/directives/ng_class.ts

@@ -5,7 +5,7 @@
  * Use of this source code is governed by an MIT-style license that can be
  * found in the LICENSE file at https://angular.io/license
  */
-import {Directive, DoCheck, Input, ɵRenderFlags, ɵɵdefineDirective, ɵɵstyleMap, ɵɵstyling, ɵɵstylingApply} from '@angular/core';
+import {Directive, DoCheck, Input, ɵRenderFlags, ΔdefineDirective, ΔstyleMap, Δstyling, ΔstylingApply} from '@angular/core';
 
 import {NgStyleImpl, NgStyleImplProvider} from './ng_style_impl';
 
@@ -29,17 +29,17 @@ export const ngStyleDirectiveDef__PRE_R3__ = undefined;
 // used when the VE is not present (note the directive will
 // never be instantiated normally because it is apart of a
 // base class)
-export const ngStyleDirectiveDef__POST_R3__ = ɵɵdefineDirective({
+export const ngStyleDirectiveDef__POST_R3__ = ΔdefineDirective({
   type: function() {} as any,
   selectors: null as any,
   factory: () => {},
   hostBindings: function(rf: ɵRenderFlags, ctx: any, elIndex: number) {
     if (rf & ɵRenderFlags.Create) {
-      ɵɵstyling();
+      Δstyling();
     }
     if (rf & ɵRenderFlags.Update) {
-      ɵɵstyleMap(ctx.getValue());
-      ɵɵstylingApply();
+      ΔstyleMap(ctx.getValue());
+      ΔstylingApply();
     }
   }
 });

packages/common/src/directives/ng_style.ts

@@ -6,7 +6,7 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-import {ErrorHandler, ɵɵdefineInjectable, ɵɵinject} from '@angular/core';
+import {ErrorHandler, ΔdefineInjectable, Δinject} from '@angular/core';
 
 import {DOCUMENT} from './dom_tokens';
 
@@ -21,9 +21,9 @@ export abstract class ViewportScroller {
   // De-sugared tree-shakable injection
   // See #23917
   /** @nocollapse */
-  static ngInjectableDef = ɵɵdefineInjectable({
+  static ngInjectableDef = ΔdefineInjectable({
     providedIn: 'root',
-    factory: () => new BrowserViewportScroller(ɵɵinject(DOCUMENT), window, ɵɵinject(ErrorHandler))
+    factory: () => new BrowserViewportScroller(Δinject(DOCUMENT), window, Δinject(ErrorHandler))
   });
 
   /**

packages/common/src/viewport_scroller.ts

@@ -160,11 +160,11 @@ describe('Renderer', () => {
       const addDefinitionsSpy = renderer.addDefinitions as jasmine.Spy;
       expect(addDefinitionsSpy.calls.first().args[2])
           .toEqual(
-              `A.ngComponentDef = ɵngcc0.ɵɵdefineComponent({ type: A, selectors: [["a"]], factory: function A_Factory(t) { return new (t || A)(); }, consts: 1, vars: 1, template: function A_Template(rf, ctx) { if (rf & 1) {
-        ɵngcc0.ɵɵtext(0);
+              `A.ngComponentDef = ɵngcc0.ΔdefineComponent({ type: A, selectors: [["a"]], factory: function A_Factory(t) { return new (t || A)(); }, consts: 1, vars: 1, template: function A_Template(rf, ctx) { if (rf & 1) {
+        ɵngcc0.Δtext(0);
     } if (rf & 2) {
-        ɵngcc0.ɵɵselect(0);
-        ɵngcc0.ɵɵtextBinding(0, ɵngcc0.ɵɵinterpolation1("", ctx.person.name, ""));
+        ɵngcc0.Δselect(0);
+        ɵngcc0.ΔtextBinding(0, ɵngcc0.Δinterpolation1("", ctx.person.name, ""));
     } }, encapsulation: 2 });
 /*@__PURE__*/ ɵngcc0.ɵsetClassMetadata(A, [{
         type: Component,
@@ -205,7 +205,7 @@ describe('Renderer', () => {
            }));
            expect(addDefinitionsSpy.calls.first().args[2])
                .toEqual(
-                   `A.ngDirectiveDef = ɵngcc0.ɵɵdefineDirective({ type: A, selectors: [["", "a", ""]], factory: function A_Factory(t) { return new (t || A)(); } });
+                   `A.ngDirectiveDef = ɵngcc0.ΔdefineDirective({ type: A, selectors: [["", "a", ""]], factory: function A_Factory(t) { return new (t || A)(); } });
 /*@__PURE__*/ ɵngcc0.ɵsetClassMetadata(A, [{
         type: Directive,
         args: [{ selector: '[a]' }]
@@ -339,7 +339,7 @@ describe('Renderer', () => {
         const typingsFile = result.find(f => f.path === '/typings/file.d.ts') !;
         expect(typingsFile.contents)
             .toContain(
-                'foo(x: number): number;\n    static ngDirectiveDef: ɵngcc0.ɵɵDirectiveDefWithMeta');
+                'foo(x: number): number;\n    static ngDirectiveDef: ɵngcc0.ΔDirectiveDefWithMeta');
       });
 
       it('should render imports into typings files', () => {

packages/compiler-cli/ngcc/test/rendering/renderer_spec.ts

@@ -423,7 +423,7 @@ export class MetadataBundler {
         result[key] = this.convertFunction(moduleName, value);
       } else if (isMetadataSymbolicCallExpression(value)) {
         // Class members can also contain static members that call a function with module
-        // references. e.g. "static ngInjectableDef = ɵɵdefineInjectable(..)". We also need to
+        // references. e.g. "static ngInjectableDef = ΔdefineInjectable(..)". We also need to
         // convert these module references because otherwise these resolve to non-existent files.
         result[key] = this.convertValue(moduleName, value);
       } else {

packages/compiler-cli/src/metadata/bundler.ts

@@ -48,15 +48,15 @@ export class NoopImportRewriter implements ImportRewriter {
  * which they're exported from r3_symbols.
  */
 const CORE_SUPPORTED_SYMBOLS = new Map<string, string>([
-  ['ɵɵdefineInjectable', 'ɵɵdefineInjectable'],
-  ['ɵɵdefineInjector', 'ɵɵdefineInjector'],
-  ['ɵɵdefineNgModule', 'ɵɵdefineNgModule'],
-  ['ɵɵsetNgModuleScope', 'ɵɵsetNgModuleScope'],
-  ['ɵɵinject', 'ɵɵinject'],
+  ['ΔdefineInjectable', 'ΔdefineInjectable'],
+  ['ΔdefineInjector', 'ΔdefineInjector'],
+  ['ΔdefineNgModule', 'ΔdefineNgModule'],
+  ['ΔsetNgModuleScope', 'ΔsetNgModuleScope'],
+  ['Δinject', 'Δinject'],
   ['ɵsetClassMetadata', 'setClassMetadata'],
-  ['ɵɵInjectableDef', 'ɵɵInjectableDef'],
-  ['ɵɵInjectorDef', 'ɵɵInjectorDef'],
-  ['ɵɵNgModuleDefWithMeta', 'ɵɵNgModuleDefWithMeta'],
+  ['ΔInjectableDef', 'ΔInjectableDef'],
+  ['ΔInjectorDef', 'ΔInjectorDef'],
+  ['ΔNgModuleDefWithMeta', 'ΔNgModuleDefWithMeta'],
   ['ɵNgModuleFactory', 'NgModuleFactory'],
 ]);
 

packages/compiler-cli/src/ngtsc/imports/src/core.ts

@@ -14,7 +14,7 @@ import * as ts from 'typescript';
 import {NgtscProgram} from '../../src/ngtsc/program';
 
 
-const IDENTIFIER = /[A-Za-z_$ɵ][A-Za-z0-9_$]*/;
+const IDENTIFIER = /[A-Za-z_$ɵΔ][A-Za-z0-9_$]*/;
 const OPERATOR =
     /!|\?|%|\*|\/|\^|&&?|\|\|?|\(|\)|\{|\}|\[|\]|:|;|<=?|>=?|={1,3}|!==?|=>|\+\+?|--?|@|,|\.|\.\.\./;
 const STRING = /'[^']*'|"[^"]*"|`[\s\S]*?`/;

packages/compiler-cli/test/compliance/mock_compile.ts

@@ -140,7 +140,7 @@ describe('mock_compiler', () => {
     expectEmit(
         result.source, `
     // TODO: this comment should not be taken into account
-    $r3$.ɵɵtext(0, "Hello!");
+    $r3$.Δtext(0, "Hello!");
     // TODO: this comment should not be taken into account
     `,
         'todo comments should be ignored');