Fixes <http://bugs.gnu.org/25089>. Reported by Leo Famulari <leo@famulari.name>. * nix/libstore/build.cc (DerivationGoal::runChild): In the 'isBuiltin' case, check whether DRV's output is in 'redirectedOutputs', and pass an 'output' argument to the built-in builder. (DerivationGoal::addHashRewrite): Add 'printMsg' call. * nix/libstore/builtins.hh (derivationBuilder): Add 'output' parameter. * nix/libstore/builtins.cc (builtinDownload): Likewise. Add OUTPUT to ARGV. * guix/scripts/perform-download.scm (perform-download): Add 'output' parameter. (guix-perform-download): Adjust 'match' clauses accordingly. * tests/derivations.scm ("'download' built-in builder, check mode"): New test.
		
			
				
	
	
		
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			45 lines
		
	
	
	
		
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| /* GNU Guix --- Functional package management for GNU
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|    Copyright (C) 2016, 2017 Ludovic Courtès <ludo@gnu.org>
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| 
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|    This file is part of GNU Guix.
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| 
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|    GNU Guix is free software; you can redistribute it and/or modify it
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|    under the terms of the GNU General Public License as published by
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|    the Free Software Foundation; either version 3 of the License, or (at
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|    your option) any later version.
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| 
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|    GNU Guix is distributed in the hope that it will be useful, but
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|    WITHOUT ANY WARRANTY; without even the implied warranty of
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|    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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|    GNU General Public License for more details.
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| 
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|    You should have received a copy of the GNU General Public License
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|    along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.  */
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| 
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| /* Interface to built-in derivation builders.  */
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| 
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| #pragma once
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| 
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| #include <derivations.hh>
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| #include <map>
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| #include <string>
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| 
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| namespace nix {
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| 
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|     inline bool isBuiltin(const Derivation & drv)
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|     {
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| 	return string(drv.builder, 0, 8) == "builtin:";
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|     }
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| 
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|     /* Build DRV, which lives at DRVPATH.  */
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|     typedef void (*derivationBuilder) (const Derivation &drv,
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| 				       const std::string &drvPath,
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| 				       const std::string &output);
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| 
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|     /* Return the built-in builder called BUILDER, or NULL if none was
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|        found.  */
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|     derivationBuilder lookupBuiltinBuilder(const std::string &builder);
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| 
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|     /* Return the list of supported built-in builder names.  */
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|     std::list<std::string> builtinBuilderNames();
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| }
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