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<title>guix.git/nix/scripts/download.in, branch master</title>
<subtitle>Personal branch of https://git.savannah.gnu.org/cgit/guix.git/ for implementing 'guix deploy'.
</subtitle>
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<updated>2016-11-16T17:19:47Z</updated>
<entry>
<title>daemon: Add "builtin:download" derivation builder.</title>
<updated>2016-11-16T17:19:47Z</updated>
<author>
<name>Ludovic Courtès</name>
<email>ludo@gnu.org</email>
</author>
<published>2015-07-20T02:30:16Z</published>
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<content type='text'>
This ensures that 1) the derivation doesn't change when Guix changes;
2) the derivation closure doesn't contain Guix and its dependencies; 3)
we don't have to rely on ugly chroot hacks.

Adapted from Nix commit 0a2bee307b20411f5b0dda0c662b1f9bb9e0e131.

* nix/libstore/build.cc (DerivationGoal::runChild): Add special case for
'isBuiltin(drv)'.  Disable chroot when 'isBuiltin(drv)'.
* nix/libstore/builtins.cc, nix/libstore/builtins.hh,
nix/scripts/download.in, guix/scripts/perform-download.scm: New files.
* guix/ui.scm (show-guix-help)[internal?]: Add 'perform-download'.
* nix/local.mk (libstore_a_SOURCES): Add builtins.cc.
(libstore_headers): Add builtins.hh.
(nodist_pkglibexec_SCRIPTS): Add 'scripts/download'.
* config-daemon.ac: Emit 'scripts/download'.
* Makefile.am (MODULES): Add 'guix/scripts/perform-download.scm'.
* tests/derivations.scm ("unknown built-in builder")
("'download' built-in builder")
("'download' built-in builder, invalid hash")
("'download' built-in builder, not found")
("'download' built-in builder, not fixed-output"): New tests.

Co-authored-by: Eelco Dolstra &lt;eelco.dolstra@logicblox.com&gt;
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