bug#26346: [PATCH 19/20] build-system/asdf: Handle versioned asdf dependencies.

[Andy Patterson]

Add support for depencies of the form (:version <name> <version>).

* guix/build/lisp-utils.scm (normalize-dependency): New variable.
(make-asd-file)[dependencies]: Use it to generate dependencies with normalized
names.
[dependency-name]: New variable.
[registry]: Use it to flatten the normalized dependencies.
---
 guix/build/lisp-utils.scm | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/guix/build/lisp-utils.scm b/guix/build/lisp-utils.scm
index 6d9341bb2..3744bac9d 100644
--- a/guix/build/lisp-utils.scm
+++ b/guix/build/lisp-utils.scm
@@ -81,6 +81,13 @@
   "Replace invalid characters in STR with a hyphen."
   (string-join (string-tokenize str valid-char-set) "-"))
 
+(define (normalize-dependency dependency)
+  "Normalize the name of DEPENDENCY."
+  (match dependency
+    ((:version name rest ...)
+     `(:version ,(normalize-string name) ,@rest))
+    (name (normalize-string name))))
+
 (define (inputs->asd-file-map inputs)
   "Produce a hash table of the form (system . asd-file), where system is the
 name of an ASD system, and asd-file is the full path to its definition."
@@ -273,16 +280,21 @@ system to find its dependencies, as described by 
GENERATE-DEPENDENCY-LINKS."
            (system-dependencies system system-asd-file)))
       (if (eq? 'NIL deps)
           '()
-          (map normalize-string deps))))
+          (map normalize-dependency deps))))
 
   (define lisp-input-map
     (inputs->asd-file-map inputs))
 
+  (define dependency-name
+    (match-lambda
+      ((_ name _ ...) name)
+      (name name)))
+
   (define registry
     (filter-map hash-get-handle
                 (make-list (length dependencies)
                            lisp-input-map)
-                dependencies))
+                (map dependency-name dependencies)))
 
   (call-with-output-file asd-file
     (lambda (port)
-- 
2.12.2