After all this discussion, I'm not sure what's to be installed, so let
me recapitulate. The patch below modifies `user-variable-p' so it
also considers as user variables these aliases that point, directly or
indirectly, to other user variables; that includes also obsolete
aliases, I'm not filtering them out. It also returns nil for alias
loops, irrespective of whether any of the aliases in the loop would
qualify as a user variable or not.
That all sounds right.
- Is there a consensus whether obsolete aliases should be shown or
not?
I am not sure what you mean by "shown". Obsolete aliases should
be accepted by user-variable-p.
- Should `set-variable' give warnings for all aliases, for obsolete
aliases only? Should o it for obsolete variables even if they aren't
aliases?
It should give warnings for all obsolete variables.
- What's the right moment to give the warning? Before setting the
value or after it?
It should be the last thing set-variable does.
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