Not possible without defining extra methods *before* you start building the system, or an indexing pass afterwards.
See how I do it in swank-asdf (which the slime maintainers unhappily disabled by default).
Hello,
starting from a file currently being processed (as per either
*compile-file-truename* or *load-truename*), how can I retrieve the ASDF
system currently being processed, and ultimately, the corresponding
source file component (when *load-truename* returns a fasl) ?
Thanks.
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