gexp: Add #:select? parameter to 'local-file'.

* guix/gexp.scm (<local-file>)[select?]: New field.
(true): New procedure.
(%local-file): Add #:select? and honor it.
(local-file): Likewise.
* tests/gexp.scm ("local-file, #:select?"): New test.
* doc/guix.texi (G-Expressions): Adjust accordingly.

1 files changed, 17 insertions, 1 deletions

diff --git a/tests/gexp.scm b/tests/gexp.scm
index db0ffd2fdd..f504b92d84 100644
--- a/tests/gexp.scm
+++ b/tests/gexp.scm
@@ -33,7 +33,8 @@
   #:use-module (rnrs io ports)
   #:use-module (ice-9 match)
   #:use-module (ice-9 regex)
-  #:use-module (ice-9 popen))
+  #:use-module (ice-9 popen)
+  #:use-module (ice-9 ftw))
 
 ;; Test the (guix gexp) module.
 
@@ -132,6 +133,21 @@
       (lambda ()
         (false-if-exception (delete-file link))))))
 
+(test-assertm "local-file, #:select?"
+  (mlet* %store-monad ((select? -> (lambda (file stat)
+                                     (member (basename file)
+                                             '("guix.scm" "tests"
+                                               "gexp.scm"))))
+                       (file -> (local-file ".." "directory"
+                                            #:recursive? #t
+                                            #:select? select?))
+                       (dir (lower-object file)))
+    (return (and (store-path? dir)
+                 (equal? (scandir dir)
+                         '("." ".." "guix.scm" "tests"))
+                 (equal? (scandir (string-append dir "/tests"))
+                         '("." ".." "gexp.scm"))))))
+
 (test-assert "one plain file"
   (let* ((file     (plain-file "hi" "Hello, world!"))
          (exp      (gexp (display (ungexp file))))