refactor(compiler): Fix defer deps fn duplicate names in Template Pipeline (#54060)

dylhunn · thePunderWoman · commit 49101330f8f8 · 2024-01-25T16:31:01.000Z
Previously, defer deps fns names were only prefixed with the component name, meaning that distinct deps fns in the same component would produce a name collision. Now, we take into account the entire template function name when naming inner deps fns. PR Close #54060
diff --git a/packages/compiler-cli/test/compliance/test_cases/r3_view_compiler_deferred/defer_deps_template.js b/packages/compiler-cli/test/compliance/test_cases/r3_view_compiler_deferred/defer_deps_template.js
@@ -1,4 +1,4 @@
-const TestCmp_Defer_1_DepsFn = () => [import("./defer_deps_ext").then(m => m.CmpA), LocalDep];
+const $TestCmp_Defer_1_DepsFn$ = () => [import("./defer_deps_ext").then(m => m.CmpA), LocalDep];
 
 function TestCmp_Defer_0_Template(rf, ctx) {
 	if (rf & 1) {
@@ -13,6 +13,6 @@ export class LocalDep {
 
 function TestCmp_Template(rf, ctx) { if (rf & 1) {
 	i0.ɵɵtemplate(0, TestCmp_Defer_0_Template, 2, 0);
-	i0.ɵɵdefer(1, 0, TestCmp_Defer_1_DepsFn);
+	i0.ɵɵdefer(1, 0, $TestCmp_Defer_1_DepsFn$);
 	i0.ɵɵdeferOnIdle();
 } }
diff --git a/packages/compiler-cli/test/compliance/test_cases/r3_view_compiler_deferred/lazy_with_blocks_template.js b/packages/compiler-cli/test/compliance/test_cases/r3_view_compiler_deferred/lazy_with_blocks_template.js
@@ -1,4 +1,4 @@
-const SimpleComponent_Defer_5_DepsFn = () => [MyLazyCmp];
+const $SimpleComponent_Defer_5_DepsFn$ = () => [MyLazyCmp];
 
 function SimpleComponent_Defer_1_Template(rf, ctx) {
 	if (rf & 1) {
@@ -42,7 +42,7 @@ template: function SimpleComponent_Template(rf, ctx) {
 	if (rf & 1) {
 		i0.ɵɵtext(0);
 		i0.ɵɵtemplate(1, SimpleComponent_Defer_1_Template, 1, 0)(2, SimpleComponent_DeferLoading_2_Template, 1, 0)(3, SimpleComponent_DeferPlaceholder_3_Template, 1, 0)(4, SimpleComponent_DeferError_4_Template, 1, 0);
-		i0.ɵɵdefer(5, 1, SimpleComponent_Defer_5_DepsFn, 2, 3, 4);
+		i0.ɵɵdefer(5, 1, $SimpleComponent_Defer_5_DepsFn$, 2, 3, 4);
 	} if (rf & 2) {
 		i0.ɵɵtextInterpolate1(" Visible: ", ctx.isVisible, ". ");
 		i0.ɵɵadvance(5);
diff --git a/packages/compiler/src/template/pipeline/src/emit.ts b/packages/compiler/src/template/pipeline/src/emit.ts
@@ -126,7 +126,6 @@ const phases: Phase[] = [
   {kind: Kind.Both, fn: expandSafeReads},
   {kind: Kind.Both, fn: generateTemporaryVariables},
   {kind: Kind.Tmpl, fn: allocateSlots},
-  {kind: Kind.Tmpl, fn: createDeferDepsFns},
   {kind: Kind.Tmpl, fn: resolveI18nElementPlaceholders},
   {kind: Kind.Tmpl, fn: resolveI18nExpressionPlaceholders},
   {kind: Kind.Tmpl, fn: extractI18nMessages},
@@ -139,6 +138,7 @@ const phases: Phase[] = [
   {kind: Kind.Tmpl, fn: generateAdvance},
   {kind: Kind.Both, fn: optimizeVariables},
   {kind: Kind.Both, fn: nameFunctionsAndVariables},
+  {kind: Kind.Tmpl, fn: createDeferDepsFns},
   {kind: Kind.Tmpl, fn: mergeNextContextExpressions},
   {kind: Kind.Tmpl, fn: generateNgContainerOps},
   {kind: Kind.Tmpl, fn: collapseEmptyInstructions},
diff --git a/packages/compiler/src/template/pipeline/src/phases/create_defer_deps_fns.ts b/packages/compiler/src/template/pipeline/src/phases/create_defer_deps_fns.ts
@@ -44,8 +44,9 @@ export function createDeferDepsFns(job: ComponentCompilationJob): void {
           throw new Error(
               'AssertionError: slot must be assigned bfore extracting defer deps functions');
         }
+        const fullPathName = unit.fnName?.replace(`_Template`, ``);
         op.resolverFn = job.pool.getSharedFunctionReference(
-            depsFnExpr, `${job.componentName}_Defer_${op.handle.slot}_DepsFn`,
+            depsFnExpr, `${fullPathName}_Defer_${op.handle.slot}_DepsFn`,
             /* Don't use unique names for TDB compatibility */ false);
       }
     }

Original file line number	Diff line number	Diff line change
`@@ -44,8 +44,9 @@ export function createDeferDepsFns(job: ComponentCompilationJob): void {`
`44`	`44`	`throw new Error(`
`45`	`45`	`'AssertionError: slot must be assigned bfore extracting defer deps functions');`
`46`	`46`	`}`
	`47`	+ const fullPathName = unit.fnName?.replace(`_Template`, ``);
`47`	`48`	`op.resolverFn = job.pool.getSharedFunctionReference(`
`48`		- depsFnExpr, `${job.componentName}_Defer_${op.handle.slot}_DepsFn`,
	`49`	+ depsFnExpr, `${fullPathName}_Defer_${op.handle.slot}_DepsFn`,
`49`	`50`	`/* Don't use unique names for TDB compatibility */ false);`
`50`	`51`	`}`
`51`	`52`	`}`