FsExtra.re

type copyOpts;

[@bs.obj] external makeCopyOpts : (~overwrite: bool=?, ~errorOnExist: bool=?, ~dereference: bool=?, ~preserveTimestamps: bool=?, ~filter: (string=>bool)=?, unit) => copyOpts = "";

/* copySync(src, dest, [options]) */
/* https://github.com/jprichardson/node-fs-extra/blob/master/docs/copy-sync.md */
[@bs.module "fs-extra"] external copySyncExternal : (string, string, copyOpts) => unit = "copySync";

let copySync = (~overwrite=?, ~errorOnExist=?, ~dereference=?, ~preserveTimestamps=?, ~filter:option(string => bool)=?,
src: string, dest: string) =>
  copySyncExternal(src, dest,
    makeCopyOpts(~overwrite?, ~errorOnExist?, ~dereference?, ~preserveTimestamps?, ~filter?, ()) );
  
copySync("SOURCE", "DESTINATION");