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authorLudovic Courtès <ludo@gnu.org>2017-11-08 13:33:25 +0100
committerLudovic Courtès <ludo@gnu.org>2017-11-08 22:36:20 +0100
commitc5a4a92f1a796e342b7db4c458f1fdb61ffc8d40 (patch)
treeb7b59ee6fc7d0153120b333c82145a830b83988a /gnu.scm
parent49483f71381ad32cdbe81b1c8ed2cc023329cc18 (diff)
downloadguix-c5a4a92f1a796e342b7db4c458f1fdb61ffc8d40.tar
guix-c5a4a92f1a796e342b7db4c458f1fdb61ffc8d40.tar.gz
gnu: Improve error reporting of the use-.*modules macros.
Suggested by Julien Lepiller and myglc2 at <https://lists.gnu.org/archive/html/guix-devel/2017-11/msg00106.html>. * gnu.scm (%try-use-modules): New procedure. (package-module-hint, service-module-hint): New procedures. (try-use-modules): New macro. (use-package-modules, use-service-modules, use-system-modules): Use it. * tests/guix-system.sh: Test it.
Diffstat (limited to 'gnu.scm')
-rw-r--r--gnu.scm100
1 files changed, 96 insertions, 4 deletions
diff --git a/gnu.scm b/gnu.scm
index 913ce61600..3e7e7c0ebc 100644
--- a/gnu.scm
+++ b/gnu.scm
@@ -1,5 +1,5 @@
;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2014, 2015, 2016, 2017 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2015 Joshua S. Grant <jgrant@parenthetical.io>
;;; Copyright © 2017 Mathieu Othacehe <m.othacehe@gmail.com>
;;;
@@ -19,6 +19,14 @@
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (gnu)
+ #:use-module (guix i18n)
+ #:use-module (guix utils)
+ #:use-module (srfi srfi-34)
+ #:use-module (srfi srfi-35)
+ #:use-module (ice-9 match)
+ #:use-module (guix packages)
+ #:use-module (gnu packages)
+ #:use-module (gnu services)
#:export (use-package-modules
use-service-modules
use-system-modules))
@@ -52,13 +60,97 @@
(module-use! i (resolve-interface m))))
%public-modules)))
+(define (%try-use-modules modules location make-hint)
+ "Attempt to load all of MODULES. Report errors as coming from LOCATION, a
+<location> record, and use MAKE-HINT to produce a fix hint."
+ (define (location->string loc)
+ (match loc
+ (#f "")
+ (($ <location> file line column)
+ (format #f "~a:~a:~a: " file line column))))
+
+ (for-each (lambda (module)
+ (catch 'misc-error
+ (lambda ()
+ (process-use-modules `((,module))))
+ (lambda _
+ (raise
+ (apply
+ make-compound-condition
+ (condition
+ (&message
+ (message (format #f (G_ "module ~a not found")
+ module))))
+ (condition
+ (&error-location (location location)))
+ (or (and=> (make-hint module) list)
+ '()))))))
+ modules))
+
+(define (package-module-hint module)
+ (define last-name
+ (match module
+ ((_ ... last)
+ (symbol->string last))))
+
+ (match (find-packages-by-name last-name)
+ (()
+ (condition
+ (&fix-hint
+ (hint (G_ "\
+You may use @command{guix package --show=foo | grep location} to search
+for the location of package @code{foo}.
+If you get the line @code{location: gnu/packages/bar.scm:174:2},
+add @code{bar} to the @code{use-package-modules} form.")))))
+ ((package _ ...)
+ (condition
+ (&fix-hint
+ (hint (format #f (G_ "\
+Try adding @code{(use-package-modules ~a)}.")
+ (basename (location-file (package-location package))
+ ".scm"))))))))
+
+(define (service-module-hint module)
+ (define last-name
+ (match module
+ ((_ ... last)
+ last)))
+
+ (match (lookup-service-types last-name)
+ (()
+ (condition
+ (&fix-hint
+ (hint (format #f (G_ "\
+You may use @command{guix system search ~a} to search for a service
+matching @code{~a}.
+If you get the line @code{location: gnu/services/foo.scm:188:2},
+add @code{foo} to the @code{use-service-modules} form.")
+ last-name last-name)))))
+ ((package _ ...)
+ (condition
+ (&fix-hint
+ (hint (format #f (G_ "\
+Try adding @code{(use-service-modules ~a)}.")
+ (basename (location-file (service-type-location package))
+ ".scm"))))))))
+
+(define-syntax-rule (try-use-modules hint modules ...)
+ (eval-when (expand load eval)
+ (%try-use-modules '(modules ...)
+ (source-properties->location
+ (current-source-location))
+ hint)))
+
(define-syntax-rule (use-package-modules module ...)
- (use-modules (gnu packages module) ...))
+ (try-use-modules package-module-hint
+ (gnu packages module) ...))
(define-syntax-rule (use-service-modules module ...)
- (use-modules (gnu services module) ...))
+ (try-use-modules service-module-hint
+ (gnu services module) ...))
(define-syntax-rule (use-system-modules module ...)
- (use-modules (gnu system module) ...))
+ (try-use-modules (const #f) ;no hint
+ (gnu system module) ...))
;;; gnu.scm ends here