path tags in the output path field

There is a good addon called Path Maker that turns tags into path components, so you can automatically name your output file based on different aspects of the scene.

extensions.blender.org/add-ons/blender-path-maker/

It works the same as the way adding ### to the output path will be substituted with the frame number.

So for example with a scene called "Fooscene_v01", and rendering camera "BarCam" you could make your output path

/somefolder/<scene>-<camera>_###

and that gets substituted as

/somefolder/Fooscene_v01-BarCam_123.exr

Unfortunately the add-on does not work with CLI rendering, which is where it would be really useful. Also the interface requires a bit of Python knowledge to use well.

A built-in render path tag system would be so useful, and would help prevent accidentally rendering over existing files when you copy a scene.