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问题:

I had created firebase functions in nodejs and deployed the code on firebase. The function was to send an email when the new user is created. I have lost the code now. Can we pull that code from firebase ?

回答1:

Note: the process below may work or not for your case. Don't rely on it as a replacement for keeping your code in a proper version control system.

You can retrieve the code for your Cloud Functions from the Cloud Console.

Go to this URL
Select the project that the function is in
Select a function from the list
You will get to this page:
Select the Source at the top
Click the "Source location" link

A zip file with the latest source of your function will start to download.

Note that these files may periodically get deleted. In that case, the above process will not work to recover your source code.

回答2:

When you click to select your project, make sure you have the right organization selected.

回答3:

It looks like that the answers given above are outdated and do not work anymore. This is the latest and most robust thalaiva way of accomplishing the task assigned to you in this tight deadline.