Subject: bug#71941: [PATCH v2 1/2] guix: fix map-derivation not handling directories

From: Sergio Pastor Pérez <[email-masked]>
Date: Wed, 5 Feb 2025 13:29:33 +0100

The `map-derivation` procedure was trying to process directories as files.
When a derivation had a 'module import' directory as input, it threw an
exception since it tried to open it as a file.

Change-Id: I9b766f9aaa03ea9307f73e8abb36bc347af4b5e6
---
 guix/derivations.scm | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/guix/derivations.scm b/guix/derivations.scm
index bef98cd26a..9c019a35bb 100644
--- a/guix/derivations.scm
+++ b/guix/derivations.scm
@@ -1074,8 +1074,10 @@ (define* (map-derivation store drv mapping
                                     ((_ . replacement)
                                      replacement)
                                     (#f
-                                     (substitute-file source
-                                                      initial replacements))))
+                                     (if (file-is-directory? source)
+                                         source
+                                         (substitute-file source
+                                                          initial replacements)))))
                                 (derivation-sources drv)))
 
              ;; Now augment the lists of initials and replacements.

base-commit: d0dbba3053123ee623d8a5889f1a0946859a205e
-- 
2.48.1