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-rw-r--r--guix/modules.scm21
-rw-r--r--tests/modules.scm25
2 files changed, 41 insertions, 5 deletions
diff --git a/guix/modules.scm b/guix/modules.scm
index 24b5903579..19a4acd76c 100644
--- a/guix/modules.scm
+++ b/guix/modules.scm
@@ -20,8 +20,13 @@
#:use-module (guix memoization)
#:use-module (guix sets)
#:use-module (srfi srfi-26)
+ #:use-module (srfi srfi-34)
+ #:use-module (srfi srfi-35)
#:use-module (ice-9 match)
- #:export (source-module-closure
+ #:export (missing-dependency-error?
+ missing-dependency-module
+
+ source-module-closure
live-module-closure
guix-module-name?))
@@ -35,6 +40,11 @@
;;;
;;; Code:
+;; The error corresponding to a missing module.
+(define-condition-type &missing-dependency-error &error
+ missing-dependency-error?
+ (module missing-dependency-module))
+
(define (colon-symbol? obj)
"Return true if OBJ is a symbol that starts with a colon."
(and (symbol? obj)
@@ -106,9 +116,12 @@ depends on."
"Return the modules used by MODULE by looking at its source code."
(if (member module %source-less-modules)
'()
- (module-file-dependencies
- (search-path load-path
- (module-name->file-name module)))))
+ (match (search-path load-path (module-name->file-name module))
+ ((? string? file)
+ (module-file-dependencies file))
+ (#f
+ (raise (condition (&missing-dependency-error
+ (module module))))))))
(define* (module-closure modules
#:key
diff --git a/tests/modules.scm b/tests/modules.scm
index 04945e531b..57019c600c 100644
--- a/tests/modules.scm
+++ b/tests/modules.scm
@@ -1,5 +1,5 @@
;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2016 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2016, 2017 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
@@ -19,7 +19,9 @@
(define-module (test-modules)
#:use-module (guix modules)
#:use-module ((guix build-system gnu) #:select (%gnu-build-system-modules))
+ #:use-module ((guix utils) #:select (call-with-temporary-directory))
#:use-module (srfi srfi-1)
+ #:use-module (srfi srfi-34)
#:use-module (srfi srfi-64))
(test-begin "modules")
@@ -42,4 +44,25 @@
(live-module-closure '((gnu build vm)))
(source-module-closure '((gnu build vm)))))
+(test-equal "&missing-dependency-error"
+ '(something that does not exist)
+ (call-with-temporary-directory
+ (lambda (directory)
+ (call-with-output-file (string-append directory "/foobar.scm")
+ (lambda (port)
+ (write '(define-module (foobar)
+ #:use-module (something that does not exist))
+ port)))
+
+ (call-with-output-file (string-append directory "/baz.scm")
+ (lambda (port)
+ (write '(define-module (baz)
+ #:use-module (foobar))
+ port)))
+
+ (guard (c ((missing-dependency-error? c)
+ (missing-dependency-module c)))
+ (source-module-closure '((baz)) (list directory)
+ #:select? (const #t))))))
+
(test-end)