[Feature] Alternative to #pragma magic to fall back to file extension.

[EtiTheSpirit]

What feature would you like to see?

Currently, #pragma magic [ ... ] can be used to enable automatic loading of patterns by fIle contents. I would like to see the addition of #pragma extensions [ .ext .ext2 ... ] or something similar.

In an ideal case, both would be usable simultaneously, and #pragma extensions would serve as a fallback only after exhausting all options. That is, try to match patterns with #pragma magic first, and if no pattern claims the format, search again using #pragma extensions instead.

How will this feature be useful to you and others?

Ordinarily, I would be against this idea on the count of the fact that a file extension does not reliably identify the contents of a file. However, there are some scenarios where a file doesn't have a header at all, and so there is currently no way to propose a pattern file for its contents. This would fill that gap.

Request Type

• I can provide a PoC for this feature or am willing to work on it myself and submit a PR

Additional context?

No response

[WerWolv]

Hey! You're not the first to bring this up.
The issue is, the pattern language (or any of the infrastructure around it really) actually knows anything about the name of the file. All it sees is a data source which it can read bytes from and that data source doesn't even have to be a file - it can be data received over the network, process memory and so on so it's not possible without more fundamental changes to add a pragma like that