Reading one "Blank Query" script by multiple reports, and still being able to refresh

Hello!

I have a custom Power Query script that generates a big and wide calendar table. Besides static dates, it has columns that comunicate information relative to a current date (e.g. difference between the date in the table and current date, YTD or not YTD, and so on). Therefore, the script has to be re-run with each refresh in order to update all values.

At first, I had same script in multiple reports. Which was a pain if I had to make a change - I had to update each script.

So, I found a workaround. I placed the script into a text file, and read off that file, which is placed on the web:

let
    Source = Text.FromBinary(Web.Contents("https://********-my.sharepoint.com/personal/*****_********_com/Documents/Power BI/Data/SourceCalendar.txt")),
    Evaluate = Expression.Evaluate(Source, #shared)
in
    Evaluate

Now, this works great!

But now, I schedule a refresh! I get this:

"You can't schedule refresh for this dataset because one or more sources currently don't support refresh."

What are other ways to make this work? 

I guess I could write up an SQL script, and put it on Azure? I'm not a developer, so I'm not sure how to do it exactly.

I tried putting the script into an Excel table, and reading off that Excel table placed on the cloud, but then the data isn't up to date until I "refresh" the data in Excel. Which is also a pain.

How can I read off a custom script by multiple report, or maybe what is another solution to my issue?