Record types of variables (e.g. for untyped function parameters)

record_variable_types.ts

function recordVariableTypes(name: string, variables: Record<string, any>) {
  const types = Object.entries(variables).reduce(
    (obj, [key, value]) => ({ ...obj, [key]: typeOf(value) }),
    {}
  );
  recordTypes(name, types);
}

function recordTypes(name: string, types: Record<string, string>) {
  const path = `types_${name}.json`;
  let current;
  if (fs.existsSync(path)) {
    current = JSON.parse(fs.readFileSync(path, "utf-8"));
  } else {
    current = {};
  }

  Object.entries(types).forEach(([key, value]) => {
    current[key] ??= {};
    current[key][value] ??= 0;
    current[key][value] += 1;
  });

  fs.writeFileSync(path, JSON.stringify(current));
}