Hello, I have some questions about the '%options' variable. [1]
1. According to the documentation, 'option' accepts four arguments: 'names', 'required-arg?', 'optional-arg?', 'processor' and "processor is a procedure that takes at least 3 arguments..." [2] So why do some options (e.g., 'version') only accept a single argument? Does it mean that the above quotation is incorrect? 2. How does 'processor' work? For instance, 'version' creates a procedure that accepts a single argument (i.e., 'args'), but it doesn't use that argument, does it? 3. Could you elaborate on 'list-available'? What will happen if I run 'guix-package -A nano'? What values will be assigned to 'opt', 'name', 'arg', and 'result'? Nikita [1] http://git.savannah.gnu.org/cgit/guix.git/tree/guix-package.in [2] https://gnu.org/software/guile/manual/guile.html
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