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ecc83e61&showmsg=1'>root/tests/store-deduplication.scm
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2020-12-15deduplicate: Create the '.links' directory lazily.Ludovic Courtès



This avoids repeated (mkdir-p "/gnu/store/.links") calls when
deduplicating lots of files.

* guix/store/deduplication.scm (deduplicate): Remove initial call to
'mkdir-p'.  Add ENOENT case in 'link' exception handler.  Reindent.
* tests/store-deduplication.scm ("deduplicate, ENOSPC"): Check
for (<= links 4) to account for the initial 'link' call.





2020-12-15store-copy: 'populate-store' can optionally deduplicate files.Ludovic Courtès



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'.





2018-12-14deduplication: Gracefully handle ENOSPC raised by 'link' calls.Ludovic Courtès



Reported by Andreas Enge <andreas@enge.fr>
in <https://bugs.gnu.org/33676>.

* guix/store/deduplication.scm (replace-with-link): Catch ENOSPC around
'get-temp-link'.  Do nothing when 'get-temp-link' throws ENOSPC.  Move
code to restore PARENT's permissions outside of 'catch'.
* tests/store-deduplication.scm ("deduplicate, ENOSPC"): New test.