Better way to detect bytecode files

[mna]

Currently, bytecode.IsBytecode() only works for io.ReadSeeker types, but the Ctx.Load() can only guarantee an io.Reader. Other way to do this?

[BenLubar]

You could do some combination of bytes.NewReader and io.MultiReader.

[mna]

I see what you mean. Read the signature bytes, create a reader off of those bytes, and combine those bytes with the rest of the reader using a multireader. Sounds like a good idea, thanks!