igrek8

import ts from "typescript";

const code = `type A = string;`;
const sourceFile = ts.createSourceFile("source.ts", code, ts.ScriptTarget.Latest);
const host = ts.createCompilerHost({});
const getSourceFile = host.getSourceFile;
host.getSourceFile = function (name, languageVersion) {
  return name === sourceFile.fileName ? sourceFile : getSourceFile.call(host, name, languageVersion);
};
const program = ts.createProgram([sourceFile.fileName], { noEmit: true }, host);

igrek8

import assert from "assert";
import ts, { isTypeAliasDeclaration } from "typescript";

function createTypeNodeFromString(type: string): ts.TypeNode {
  const sourceFile = ts.createSourceFile("source.ts", `type A = ${type};`, ts.ScriptTarget.Latest);
  const statement = sourceFile.statements[0];
  assert(isTypeAliasDeclaration(statement));
  return statement.type;
}

igrek8

export function packJSON(object: unknown) {
  const fragments: object[] = [];
  const indices = new Map<string, number>();
  function next(node: unknown): unknown {
    if (node && typeof node === "object") {
      let fragment: object;
      if (Array.isArray(node)) {
        fragment = node.map((el) => next(el));
      } else {
        fragment = Object.entries(node).reduce<Record<string, unknown>>((obj, [key, value]) => {