Create Data Factory Dataset in a specific Azure DevOps branch rather than directly in Data Factory

Question

While trying to build an ADF pipeline that generates datasets within Data Factory, I ran into an interesting issue. Or maybe I misunderstand some components completely, in which case I'd happily be educated.

I basically read some meta data from a SQL Database table which determines which source system, schema and tables I should pull new data from. The meta data is stored within a bunch of variables, which then feed a Web Request that attempts to generate a new Data Source as per the MS documentation. Yes, I'm trying to use Azure Data Factory to generate Azure Data Factory components.

The URL to create the DataSet and the JSON Body for the request are both generated using @Concat and a number of the variables. The resulting DataSet is a very straightforward file that does not contain references to the columns, but just the table schema and table name. I generated these manually before, and that all seems to work brilliantly. I basically have a dataset connected to the source system, referincing the table from the meta data.

The code runs, but the resulting dataset is directly published, as opposed to being added in my working branch. While this should not be a big issue once I manage to properly test everything, ideally the object would be created in my working branch (using Azure DevOps, thus a local file).

My next thought was to set up a linked service to my local PC, and simply write the same contents as above there. My challenge seems to be that I essentially am creating a file out of nothing. I am trying to use a Copy Data component, and added an empty placeholder file to act as a source.

I configure the sink with Dynamic Content for Copy Behavior, and attempted to add the JSON contents there. This gets the file created, but it's unfortunately empty. I also attempted to add a new column to the source with the data being the same contents.

However, seeing the file to be used as a sink doesn't exist, a mapping error will occur. Apart from this, I'd not want a column header to be written; just the dynamically created contents.

I'm not sure how to continue with this. I feel I'm very close to achieving my goal, but cannot seem to take this final hurdle.

Any hints or suggestions would be very welcome.