diff options
| -rw-r--r-- | guix/scripts.scm | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/guix/scripts.scm b/guix/scripts.scm index 34cba35401..c9ea9f2e29 100644 --- a/guix/scripts.scm +++ b/guix/scripts.scm @@ -4,6 +4,7 @@ ;;; Copyright © 2015, 2016 Alex Kost <alezost@gmail.com> ;;; Copyright © 2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org> ;;; Copyright © 2021 Ricardo Wurmus <rekado@elephly.net> +;;; Copyright © 2021 Simon Tournier <zimon.toutoune@gmail.com> ;;; ;;; This file is part of GNU Guix. ;;; @@ -112,6 +113,13 @@ procedure, but both the category and synopsis are meant to be read (parsed) by doc body ...))))) +(define (option-hint guess options) + "Return the closest long-name OPTIONS from GUESS, +according to'string-distance'." + (define (options->long-names options) + (filter string? (append-map option-names options))) + (string-closest guess (options->long-names options) #:threshold 3)) + (define (args-fold* args options unrecognized-option-proc operand-proc . seeds) "A wrapper on top of `args-fold' that does proper user-facing error reporting." @@ -149,7 +157,12 @@ parameter of 'args-fold'." ;; Actual parsing takes place here. (apply args-fold* args options (lambda (opt name arg . rest) - (leave (G_ "~A: unrecognized option~%") name)) + (let ((hint (option-hint name options))) + (report-error (G_ "~A: unrecognized option~%") name) + (when hint + (display-hint + (format #f (G_ "Did you mean @code{~a}?~%") hint))) + (exit 1))) argument-handler seeds)) |