Add support for experimentalDecorators ts option. To use with TS5 decorators (#606)

Co-authored-by: kriz <[email protected]>

Author: krizka

README.md

@@ -52,6 +52,8 @@ Options:
   --defaultNumberType   Default number type.                                         [choices: "number", "integer"] [default: "number"]
   --tsNodeRegister      Use ts-node/register (needed for require typescript files).  [boolean] [default: false]
   --constAsEnum         Use enums with a single value when declaring constants.      [boolean] [default: false]
+  --experimentalDecorators  Use experimentalDecorators when loading typescript modules.
+   [boolean] [default: true]
 ```
 
 ### Programmatic use

typescript-json-schema-cli.ts

@@ -32,6 +32,8 @@ export function run() {
             .describe("esModuleInterop", "Use esModuleInterop when loading typescript modules.")
         .boolean("skipLibCheck").default("skipLibCheck", defaultArgs.skipLibCheck)
             .describe("skipLibCheck", "Use skipLibCheck when loading typescript modules.")
+        .boolean("experimentalDecorators").default("experimentalDecorators", defaultArgs.experimentalDecorators)
+            .describe("skipLibCheck", "Use experimentalDecorators when loading typescript modules.")
         .boolean("ignoreErrors").default("ignoreErrors", defaultArgs.ignoreErrors)
             .describe("ignoreErrors", "Generate even if the program has errors.")
         .alias("out", "o")
@@ -70,6 +72,7 @@ export function run() {
         strictNullChecks: args.strictNullChecks,
         esModuleInterop: args.esModuleInterop,
         skipLibCheck: args.skipLibCheck,
+        experimentalDecorators: args.experimentalDecorators,
         ignoreErrors: args.ignoreErrors,
         out: args.out,
         validationKeywords: args.validationKeywords,

typescript-json-schema.ts

@@ -49,6 +49,7 @@ export function getDefaultArgs(): Args {
         strictNullChecks: false,
         esModuleInterop: false,
         skipLibCheck: false,
+        experimentalDecorators: true,
         ignoreErrors: false,
         out: "",
         validationKeywords: [],
@@ -81,6 +82,7 @@ export type Args = {
     esModuleInterop: boolean;
     skipLibCheck: boolean;
     ignoreErrors: boolean;
+    experimentalDecorators: boolean;
     out: string;
     validationKeywords: string[];
     include: string[];
@@ -1833,6 +1835,8 @@ export async function exec(filePattern: string, fullTypeName: string, args = get
             strictNullChecks: args.strictNullChecks,
             esModuleInterop: args.esModuleInterop,
             skipLibCheck: args.skipLibCheck,
+            emitDecoratorMetadata: args.experimentalDecorators,
+            experimentalDecorators: args.experimentalDecorators,
         });
         onlyIncludeFiles = onlyIncludeFiles.map(normalizeFileName);
     }