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06/09: guix build: Parameterize '%graft?' upfront.


From: guix-commits
Subject: 06/09: guix build: Parameterize '%graft?' upfront.
Date: Thu, 5 Mar 2020 11:14:50 -0500 (EST)

civodul pushed a commit to branch master
in repository guix.

commit f42f39ad68354d19c63222a9630c6e340843aa86
Author: Ludovic Court├Ęs <address@hidden>
AuthorDate: Thu Mar 5 15:52:37 2020 +0100

    guix build: Parameterize '%graft?' upfront.
    
    * guix/scripts/build.scm (guix-build): Add 'graft?' variable and
    parameterize %GRAFT?.
---
 guix/scripts/build.scm | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/guix/scripts/build.scm b/guix/scripts/build.scm
index 5c690cb..da2a675 100644
--- a/guix/scripts/build.scm
+++ b/guix/scripts/build.scm
@@ -943,13 +943,21 @@ needed."
     (parse-command-line args %options
                         (list %default-options)))
 
+  (define graft?
+    (assoc-ref opts 'graft?))
+
   (with-error-handling
     (with-status-verbosity (assoc-ref opts 'verbosity)
       (with-store store
         ;; Set the build options before we do anything else.
         (set-build-options-from-command-line store opts)
 
-        (parameterize ((current-terminal-columns (terminal-columns)))
+        (parameterize ((current-terminal-columns (terminal-columns))
+
+                       ;; Set grafting upfront in case the user's input
+                       ;; depends on it (e.g., a manifest or code snippet that
+                       ;; calls 'gexp->derivation').
+                       (%graft?                  graft?))
           (let* ((mode  (assoc-ref opts 'build-mode))
                  (drv   (options->derivations store opts))
                  (urls  (map (cut string-append <> "/log")



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