Hi, Christopher Baines <m...@cbaines.net> skribis:
> I thought I was beginning to understand derivations, but I've hit a > problem I can't explain. > > I've got a derivation in my local store, and as far as I can work out, > all the outputs for all the required inputs of this derivation are in > the store as well. > > scheme@(guix-user)> (use-modules (srfi srfi-1) (guix derivations)) > scheme@(guix-user)> (define drv (read-derivation-from-file > "/gnu/store/mafs37vw7k65ah071p8f080c9y1y3l7n-bbmap-35.82.drv")) > scheme@(guix-user)> (define required-outputs (append-map > derivation-input-output-paths (derivation-inputs drv))) > scheme@(guix-user)> (define missing-outputs (remove file-exists? > required-outputs)) > scheme@(guix-user)> missing-outputs > $1 = () You should use ‘valid-path?’ instead of ‘file-exists?’: it’s possible for an item to be present in store while being “invalid”, for instance because it’s a leftover from a failed build (with ‘-K’). Ludo’.
