Bun provides a handful of module-specific utilities on the import.meta object. Use import.meta.dir to retrieve the absolute path to the directory containing the current file.
/a/b/c.ts
import.meta.dir; // => "/a/b"
See import.meta.
Runtime docs · Guides · Utilities
Get the directory of the current file
Get the absolute path of the directory that contains the current module with import.meta.dir.