X-Git-Url: https://git.hcoop.net/jackhill/guix/guix.git/blobdiff_plain/c9384945984c393ef1a15efb5c07e272a27a2215..refs/heads/wip-bees:/gnu.scm

diff --git a/gnu.scm b/gnu.scm
index e573de6531..f139531ef3 100644
--- a/gnu.scm
+++ b/gnu.scm
@@ -1,5 +1,7 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2014 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2014, 2015, 2016, 2017, 2019, 2020 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2015 Joshua S. Grant <jgrant@parenthetical.io>
+;;; Copyright © 2017 Mathieu Othacehe <m.othacehe@gmail.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -16,7 +18,18 @@
 ;;; You should have received a copy of the GNU General Public License
 ;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
 
-(define-module (gnu))
+(define-module (gnu)
+  #:use-module (guix i18n)
+  #:use-module (guix diagnostics)
+  #: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))
 
 ;;; Commentary:
 ;;;
@@ -28,19 +41,115 @@
   (begin
     (define %public-modules
       '((gnu system)
+        (gnu system mapped-devices)
         (gnu system file-systems)
-        (gnu system grub)                         ; 'grub-configuration'
-        (gnu system linux)                        ; 'base-pam-services'
+        (gnu bootloader)
+        (gnu bootloader grub)
+        (gnu system keyboard)
+        (gnu system pam)
         (gnu system shadow)                       ; 'user-account'
         (gnu system linux-initrd)
+        (gnu system nss)
         (gnu services)
         (gnu services base)
         (gnu packages)
-        (gnu packages base)))
+        (gnu packages base)
+        (guix gexp)))                             ; so gexps can be used
 
     (for-each (let ((i (module-public-interface (current-module))))
                 (lambda (m)
                   (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
+                    (formatted-message (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 ...)
+  (try-use-modules package-module-hint
+                   (gnu packages module) ...))
+
+(define-syntax-rule (use-service-modules module ...)
+  (try-use-modules service-module-hint
+                   (gnu services module) ...))
+
+(define-syntax-rule (use-system-modules module ...)
+  (try-use-modules (const #f)                     ;no hint
+                   (gnu system module) ...))
+
 ;;; gnu.scm ends here