dynamic output-file value base on other yaml metadata

[kompre]

Description

I would like for the key output-file key to dynamically generated by referring to other meta data available in the doc, for example title and a new key banana, but I'm not able to get the desired interpolated value.

The qmd would look like:

---
title: "yaml"
format: pdf

author: {{< meta banana >}} # this works

banana: dynamic

output-file: "{{< meta banana >}} and {{< meta title >}}" #  this would not be interpolated and result in "{{ meta banana }} and {{ meta title }}.pdf"
---

## Interpolated value

the value I would like to have is "{{< meta banana >}} and {{< meta title >}}"

Yaml anchors/alias cannot do interpolation.

Is this something that could be achieved with a filter maybe? A nudge into the right direction would be appreciate.

SIDE NOTE: while creating the mwe for this question I discovered that not all the values defined in the fronmatter/_quarto.yml file are reacheable with the shortcode meta (for example project.title). I was under the impression that everything in the _quarto.yml would be accessible for how it is worded here.

---

quarto version: 1.7.33
OS: windows 11, WSL (Ubuntu 22.04.5 LTS)

[mcanouil]

You can't as this variable is required for various structural element such as path location.

Either use a pre-render script or a post-render script to copy/move the file.
The alternative is to use the CLI flag.

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