[feature request] Add package dependencies

[TheOneWithTheBraid]

Is your feature request related to a problem?

My Flutter application calls native platform binaries to render eg. LaTeX using pdflatex. To support this in packaged builds, I would need to be able to add native platform dependencies to the packages.

Describe the feature you'd like

• linux-deb: possible by modifying DEBIAN/control.tmpl
• linux-rpm: possible by modifying SPECS/{{.packageName}}.spec.tmpl
• linux-snap: unsuccessfully tried to add parts > app > stage-packages. Is it somehow possible to include packages from the underlying Ubuntu?
• linux-appimage: somehow include tarballs or similar inside the AppImage file?
• linux-pgk: modify PKGBUILD.tmpl and add depends()
• windows-msi: no idea, not a Windows user. Would be great to include chocolatery packages
• darwin-*: no idea, not a macOS user. Include homebrew packages?

[provokateurin]

I think for snap and appimage there is a possibility to add dependencies, but I don't have any experience with them. For darwin and windows I have no clue, but from the way software management on these platforms work I would guess there is no standard way to do it.

[TheOneWithTheBraid]

Well, on windows, there are two working formats of software distribution, I guess: MSI and choco. I don't know how far it is possible to include a package of the chocolatey inside an MSI but I think it might be possible to include prebuilt MSIs inside another MSI.
On macOS, the same but the formats are called pkg and brew...