feat: add support for TypeScript 3.3 (and drop older versions) (#29004)

https://blogs.msdn.microsoft.com/typescript/2019/01/31/announcing-typescript-3-3/

BREAKING CHANGE: TypeScript 3.1 and 3.2 are no longer supported.

Please update your TypeScript version to 3.3

PR Close #29004

packages/compiler-cli/src/ngtsc/shims/src/host.ts

@@ -44,6 +44,9 @@ export class GeneratedShimsHostWrapper implements ts.CompilerHost {
     if (delegate.directoryExists !== undefined) {
       this.directoryExists = (directoryName: string) => delegate.directoryExists !(directoryName);
     }
+    if (delegate.getDirectories !== undefined) {
+      this.getDirectories = (path: string) => delegate.getDirectories !(path);
+    }
   }
 
   resolveTypeReferenceDirectives?:
@@ -84,7 +87,7 @@ export class GeneratedShimsHostWrapper implements ts.CompilerHost {
 
   getCurrentDirectory(): string { return this.delegate.getCurrentDirectory(); }
 
-  getDirectories(path: string): string[] { return this.delegate.getDirectories(path); }
+  getDirectories?: (path: string) => string[];
 
   getCanonicalFileName(fileName: string): string {
     return this.delegate.getCanonicalFileName(fileName);

packages/compiler-cli/src/ngtsc/synthetic_files_compiler_host.ts

@@ -41,6 +41,9 @@ export class SyntheticFilesCompilerHost implements PluginCompilerHost {
         this.syntheticFiles.set(generated.fileName, generated);
       }
     }
+    if (delegate.getDirectories !== undefined) {
+      this.getDirectories = (path: string) => delegate.getDirectories !(path);
+    }
   }
 
   fileExists(filePath: string): boolean {
@@ -88,7 +91,7 @@ export class SyntheticFilesCompilerHost implements PluginCompilerHost {
 
   getNewLine(): string { return this.delegate.getNewLine(); }
 
-  getDirectories(path: string) { return this.delegate.getDirectories(path); }
+  getDirectories?: (path: string) => string[];
 
   readFile(fileName: string): string|undefined { return this.delegate.readFile(fileName); }
 

packages/compiler-cli/src/ngtsc/typecheck/src/host.ts

@@ -34,6 +34,10 @@ export class TypeCheckProgramHost implements ts.CompilerHost {
     // as efficient as possible. To support both of these requirements, all of the program's
     // source files are loaded into the cache up front.
     program.getSourceFiles().forEach(file => { this.sfCache.set(file.fileName, file); });
+
+    if (delegate.getDirectories !== undefined) {
+      this.getDirectories = (path: string) => delegate.getDirectories !(path);
+    }
   }
 
   getSourceFile(
@@ -77,7 +81,7 @@ export class TypeCheckProgramHost implements ts.CompilerHost {
 
   getCurrentDirectory(): string { return this.delegate.getCurrentDirectory(); }
 
-  getDirectories(path: string): string[] { return this.delegate.getDirectories(path); }
+  getDirectories?: (path: string) => string[];
 
   getCanonicalFileName(fileName: string): string {
     return this.delegate.getCanonicalFileName(fileName);

packages/compiler-cli/src/transformers/program.ts

@@ -72,14 +72,14 @@ const defaultEmitCallback: TsEmitCallback =
  * Minimum supported TypeScript version
  * ∀ supported typescript version v, v >= MIN_TS_VERSION
  */
-const MIN_TS_VERSION = '3.1.1';
+const MIN_TS_VERSION = '3.3.3333';
 
 /**
  * Supremum of supported TypeScript versions
  * ∀ supported typescript version v, v < MAX_TS_VERSION
  * MAX_TS_VERSION is not considered as a supported TypeScript version
  */
-const MAX_TS_VERSION = '3.3.0';
+const MAX_TS_VERSION = '3.4.0';
 
 class AngularCompilerProgram implements Program {
   private rootNames: string[];
@@ -463,14 +463,14 @@ class AngularCompilerProgram implements Program {
     // Match behavior of tsc: only produce emit diagnostics if it would block
     // emit. If noEmitOnError is false, the emit will happen in spite of any
     // errors, so we should not report them.
-    if (this.options.noEmitOnError === true) {
+    if (emitResult && this.options.noEmitOnError === true) {
       // translate the diagnostics in the emitResult as well.
       const translatedEmitDiags = translateDiagnostics(this.hostAdapter, emitResult.diagnostics);
       emitResult.diagnostics = translatedEmitDiags.ts.concat(
           this.structuralDiagnostics.concat(translatedEmitDiags.ng).map(ngToTsDiagnostic));
     }
 
-    if (!outSrcMapping.length) {
+    if (emitResult && !outSrcMapping.length) {
       // if no files were emitted by TypeScript, also don't emit .json files
       emitResult.diagnostics =
           emitResult.diagnostics.concat([createMessageDiagnostic(`Emitted no files.`)]);
@@ -506,7 +506,7 @@ class AngularCompilerProgram implements Program {
       });
     }
     const emitEnd = Date.now();
-    if (this.options.diagnostics) {
+    if (emitResult && this.options.diagnostics) {
       emitResult.diagnostics = emitResult.diagnostics.concat([createMessageDiagnostic([
         `Emitted in ${emitEnd - emitStart}ms`,
         `- ${emittedUserTsCount} user ts files`,