diff options
Diffstat (limited to 'guix/ui.scm')
| -rw-r--r-- | guix/ui.scm | 51 |
1 files changed, 40 insertions, 11 deletions
diff --git a/guix/ui.scm b/guix/ui.scm index 223d2eb2a0..8d351607d8 100644 --- a/guix/ui.scm +++ b/guix/ui.scm @@ -76,6 +76,7 @@ show-manifest-transaction call-with-error-handling with-error-handling + with-unbound-variable-handling leave-on-EPIPE read/eval read/eval-package-expression @@ -158,7 +159,7 @@ messages." ((proc message (variable) _ ...) ;; We can always omit PROC because when it's useful (i.e., different from ;; "module-lookup"), it gets displayed before. - (format port (G_ "~a: unbound variable") variable)) + (format port (G_ "error: ~a: unbound variable") variable)) (_ (default-printer)))) @@ -309,6 +310,21 @@ PORT." (- (terminal-columns) 5)))) (texi->plain-text message)))) +(define* (report-unbound-variable-error args #:key frame) + "Return the given unbound-variable error, where ARGS is the list of 'throw' +arguments." + (match args + ((key . args) + (print-exception (current-error-port) frame key args))) + (match args + (('unbound-variable proc message (variable) _ ...) + (match (known-variable-definition variable) + (#f + (display-hint (G_ "Did you forget a @code{use-modules} form?"))) + ((? module? module) + (display-hint (format #f (G_ "Did you forget @code{(use-modules ~a)}?") + (module-name module)))))))) + (define* (report-load-error file args #:optional frame) "Report the failure to load FILE, a user-provided Scheme file. ARGS is the list of arguments received by the 'throw' handler." @@ -329,16 +345,8 @@ ARGS is the list of arguments received by the 'throw' handler." (let ((loc (source-properties->location properties))) (format (current-error-port) (G_ "~a: error: ~a~%") (location->string loc) message))) - (('unbound-variable proc message (variable) _ ...) - (match args - ((key . args) - (print-exception (current-error-port) frame key args))) - (match (known-variable-definition variable) - (#f - (display-hint (G_ "Did you forget a @code{use-modules} form?"))) - (module - (display-hint (format #f (G_ "Did you forget @code{(use-modules ~a)}?") - (module-name module)))))) + (('unbound-variable _ ...) + (report-unbound-variable-error args #:frame frame)) (('srfi-34 obj) (if (message-condition? obj) (if (error-location? obj) @@ -379,6 +387,27 @@ exiting. ARGS is the list of arguments received by the 'throw' handler." (warning (G_ "failed to load '~a':~%") file) (apply display-error #f (current-error-port) args)))) +(define (call-with-unbound-variable-handling thunk) + (define tag + (make-prompt-tag "user-code")) + + (catch 'unbound-variable + (lambda () + (call-with-prompt tag + thunk + (const #f))) + (const #t) + (rec (handle-error . args) + (let* ((stack (make-stack #t handle-error tag)) + (frame (and stack (last-frame-with-source stack)))) + (report-unbound-variable-error args #:frame frame) + (exit 1))))) + +(define-syntax-rule (with-unbound-variable-handling exp ...) + "Capture 'unbound-variable' exceptions in the dynamic extent of EXP... and +report them in a user-friendly way." + (call-with-unbound-variable-handling (lambda () exp ...))) + (define (install-locale) "Install the current locale settings." (catch 'system-error |