From 6a060ff27ff68384d7c90076baa36c349fff689d Mon Sep 17 00:00:00 2001
From: Ludovic Courtès <ludo@gnu.org>
Date: Thu, 10 Dec 2020 15:12:34 +0100
Subject: store-copy: 'populate-store' can optionally deduplicate files.

Until now deduplication was performed as an additional pass after
copying files, which involve re-traversing all the files that had just
been copied.

* guix/store/deduplication.scm (copy-file/deduplicate): New procedure.
* tests/store-deduplication.scm ("copy-file/deduplicate"): New test.
* guix/build/store-copy.scm (populate-store): Add #:deduplicate?
parameter and honor it.
* tests/gexp.scm ("gexp->derivation, store copy"): Pass #:deduplicate? #f
to 'populate-store'.
* gnu/build/image.scm (initialize-root-partition): Pass #:deduplicate?
to 'populate-store'.  Pass #:deduplicate? #f to 'register-closure'.
* gnu/build/vm.scm (root-partition-initializer): Likewise.
* gnu/build/install.scm (populate-single-profile-directory): Pass
 #:deduplicate? #f to 'populate-store'.
* gnu/build/linux-initrd.scm (build-initrd): Likewise.
* guix/scripts/pack.scm (self-contained-tarball)[import-module?]: New
procedure.
[build]: Pass it as an argument to 'source-module-closure'.
* guix/scripts/pack.scm (squashfs-image)[build]: Wrap in
'with-extensions'.
* gnu/system/linux-initrd.scm (expression->initrd)[import-module?]: New
procedure.
[builder]: Pass it to 'source-module-closure'.
* gnu/system/install.scm (cow-store-service-type)[import-module?]: New
procedure.  Pass it to 'source-module-closure'.
---
 gnu/build/vm.scm | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'gnu/build/vm.scm')

diff --git a/gnu/build/vm.scm b/gnu/build/vm.scm
index abb0317faf..03be5697b7 100644
--- a/gnu/build/vm.scm
+++ b/gnu/build/vm.scm
@@ -395,7 +395,8 @@ system that is passed to 'populate-root-file-system'."
     (when copy-closures?
       ;; Populate the store.
       (populate-store (map (cut string-append "/xchg/" <>) closures)
-                      target))
+                      target
+                      #:deduplicate? deduplicate?))
 
     ;; Populate /dev.
     (make-device-nodes target)
@@ -412,7 +413,7 @@ system that is passed to 'populate-root-file-system'."
       (for-each (lambda (closure)
                   (register-closure target
                                     (string-append "/xchg/" closure)
-                                    #:deduplicate? deduplicate?))
+                                    #:deduplicate? #f))
                 closures)
       (unless copy-closures?
         (umount target-store)))
-- 
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