[FEATURE] [INTERNAL] httpRepository source should support single files

Note

The following is about the spec.sourceRef.httpRepository source type which is not yet released for public usage (therefore not documented); use at your own risk.

Is your feature request related to a problem? Please describe.

Currently, spec.sourceRef.httpRepository.url must target a tar.gz archive. Other content formats such as

• .tar.bz2
• .tar (non-compressed)
• or even a single YAML file

are not supported.

For example it would be nice if one could install something like https://github.com/cert-manager/cert-manager/releases/download/v1.21.0/cert-manager.yaml by just referencing the file via a spec.sourceRef.httpRepository.

Describe the solution you'd like

Evaluate the content type of the downloaded url (maybe plus some guessing magic a la file).

Additional context

Caveat: this would be probably implemented in downloadArchive() in ./internal/generator. Which is also used by the flux sources. Please double and triple check any change with respect to interaction with the flux source-controller.