Hi! I am writing a module in Guile, and I would like to have an optional dependency on another library. And I am not sure how to express it. So far I found that #:autoload can be used for it.
I have tried two approaches: #:autoload (guix derivations) (build-derivations derivation? derivation->output-path) #:autoload (guix gexp) (lower-object) #:autoload (guix store) (run-with-store store-protocol-error? with-store) This works, but when I try to compile my library in environment without Guix, I get a lot of warnings in the build log: ;;; Failed to autoload with-store in (guix store): ;;; no code for module (guix store) ;;; Failed to autoload run-with-store in (guix store): ;;; no code for module (guix store) ... The build does succeed, but the spam in the logs is annoying. The other approach I discovered is using module-autoload!: (module-autoload! (current-module) '(guix derivations) '(build-derivations derivation? derivation->output-path) '(guix gexp) '(lower-object) '(guix store) '(run-with-store store-protocol-error? with-store)) This *also* works, but *also* leads to (different) warnings: wolfsden/guix/utils.scm:62:14: warning: possibly unbound variable `with-store' wolfsden/guix/utils.scm:62:25: warning: possibly unbound variable `%store' wolfsden/guix/utils.scm:63:16: warning: possibly unbound variable `run-with-store' wolfsden/guix/utils.scm:64:18: warning: possibly unbound variable `lower-object' wolfsden/guix/utils.scm:66:14: warning: possibly unbound variable `store-protocol-error?' wolfsden/guix/utils.scm:70:9: warning: possibly unbound variable `build-derivations' wolfsden/guix/utils.scm:71:20: warning: possibly unbound variable `derivation?' wolfsden/guix/utils.scm:72:20: warning: possibly unbound variable `derivation->output-path' Is there a way to have a module as an optional dependency without any warnings? For example, is there a way to convince the Guile that those specific variables will be bound? How do people commonly approach this? Thanks, Tomas Volf -- There are only two hard things in Computer Science: cache invalidation, naming things and off-by-one errors.
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