async support added for storagePath() function

[codeonprod]

Hi,
I’m using ostrio:files in a Meteor project and ran into a limitation regarding storagePath().

Current behavior

storagePath() is called synchronously, which makes it impossible to compute the value using asynchronous operations.

Example use cases where async is required:

• Fetching storage directory from an external API/microservice
• Reading path from a database
• Using dynamic per-user storage resolution that requires async lookups
• Awaiting cloud / remote mount status before determining path

Right now, returning a Promise or using async/await inside storagePath() does not work — the function must return a string immediately.

Impact

This prevents:

• Multi-tenant storage routing
• User-specific or organization-specific folders resolved from DB
• Integration with remote storage services that determine the directory dynamically
• Compatibility with applications where storage rules are not fully known at startup

Desired behavior

Allow storagePath() to be asynchronous.

Example idea:

new FilesCollection({
  storagePath: async (fileObj) => {
    const dir = await getBucketFromDB(fileObj.userId);
    return `/mnt/data/${dir}`;
  }
});

[jankapunkt]

This method is added but nowhere used. What's its purpose?

[codeonprod]

That function's content was earlier used inside the constructor to check the existence of the path provided. it was async to check so causing issue while making FilesCollection object. so, moved to separate function. The end user will have flexibility to call this searately if needed.

[codeonprod]

its primary purpose is to create directory of not exists.