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* hydra: Invalidate derivation caches after each architecture evaluation.Ludovic Courtès2017-12-13
| | | | | | | | This reduces max RSS from 1.3G to 1.0G. * guix/derivations.scm (invalidate-derivation-caches!): New procedure. * build-aux/hydra/gnu-system.scm (hydra-jobs): Use it. Add 'format' call.
* derivations: Don't memoize 'derivation-hash'.Ludovic Courtès2017-12-13
| | | | | | | | This has little or no run-time impact and slightly reduces the memory footprint. * guix/derivations.scm (derivation-hash): Replace 'mlambda' with 'lambda'.
* derivations: Split 'derivation-hash' in two procedures.Ludovic Courtès2017-12-13
| | | | | * guix/derivations.scm (derivation/masked-inputs): New procedure. (derivation-hash): Use it instead of the inline code.
* Revert "derivations: 'derivation-hash' assumes inputs are coalesced."Ludovic Courtès2017-12-13
| | | | | | This reverts commit 1d008d9f8c44dfdb808235d451b72f255e72f103. Reported by Rutger Helling <rhelling@mykolab.com>. Fixes <https://bugs.gnu.org/29689>.
* derivations: 'derivation-hash' assumes inputs are coalesced.Ludovic Courtès2017-12-12
| | | | | * guix/derivations.scm (derivation-hash): Remove redundant 'coalesce-duplicate-inputs' call.
* derivations: Use 'define-immutable-record-type' as appropriate.Ludovic Courtès2017-12-12
| | | | | | | This is a followup to dc673fa1131fb5d1e5ca29acb4a693cfb906986f. * guix/derivations.scm (<derivation-output>, <derivation-input>): Use 'define-immutable-record-type'.
* derivations: Introduce 'read-derivation-from-file'.Ludovic Courtès2017-06-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This avoids the open/fstat/close syscalls upon a cache hit that we had with the previous idiom: (call-with-input-file file read-derivation) where caching happened in 'read-derivation' itself. * guix/derivations.scm (%read-derivation): Rename to... (read-derivation): ... this. (read-derivation-from-file): New procedure. (derivation-prerequisites, substitution-oracle) (derivation-prerequisites-to-build): (derivation-path->output-path, derivation-path->output-paths): (derivation-path->base16-hash, map-derivation): Use 'read-derivation-from-file' instead of (call-with-input-file … read-derivation). * guix/grafts.scm (item->deriver): Likewise. * guix/scripts/build.scm (log-url, options->things-to-build): Likewise. * guix/scripts/graph.scm (file->derivation): Remove. (derivation-dependencies, %derivation-node-type): Use 'read-derivation-from-file' instead. * guix/scripts/offload.scm (guix-offload): Likewise. * guix/scripts/perform-download.scm (guix-perform-download): Likewise. * guix/scripts/publish.scm (load-derivation): Remove. (narinfo-string): Use 'read-derivation-from-file'.
* derivations: 'derivation-prerequisites-to-build' returns <substitutable>.Ludovic Courtès2017-06-02
| | | | | | | | | | | | | | | | * guix/derivations.scm (derivation-prerequisites-to-build): Rename #:substitutable? to #:substitutable-info. [derivation-substitutable?]: Rename to... [derivation-substitutable-info]: ... this. Return a list of <substitutable>. Second return value is now a list of <substitutable> instead of a list of strings. * guix/ui.scm (show-what-to-build)[substitutable?]: Rename to... [substitutable-info]: ... this. Adjust to new 'derivation-prerequisites-to-build' return value type. * tests/derivations.scm ("derivation-prerequisites-to-build and substitutes"): Adjust. ("derivation-prerequisites-to-build and substitutes, local build"): Likewise.
* derivations: 'substitution-oracle' returns a <substitutable>.Ludovic Courtès2017-06-02
| | | | | | | | | * guix/derivations.scm (substitution-oracle): Use 'substitution-path-info' instead of 'substitution-paths'. Turn SUBST into a vhash from path to <substitutable>. Change the returned procedure to provide a <substitutable> instead of a Boolean. * tests/derivations.scm ("substitution-oracle and #:substitute? #f"): Mock 'substitutable-path-info' instead of 'substitutable-paths'.
* store: Add store path computation procedures.Ludovic Courtès2017-05-04
| | | | | | * guix/derivations.scm (compressed-hash, store-path) (output-path, fixed-output-path): Move to... * guix/store.scm: ... here.
* derivations: Restore UTF-8 encoding of build scripts.Ludovic Courtès2017-04-21
| | | | | | | | | | | Reported by Mark H Weaver <mhw@netris.org> at <https://lists.gnu.org/archive/html/guix-devel/2017-04/msg00457.html>. * guix/derivations.scm (build-expression->derivation): Use a string output port for the expression. This reverts part of 2dce88d5bbe7a65e101c0734d1c6db44ecc8c299. * tests/derivations.scm ("build-expression->derivation and builder encoding"): New test.
* derivations: Avoid string-to-bytevector conversions.Ludovic Courtès2017-04-20
| | | | | | | | | | | | | | On Guile 2.2.1, this yields a 5% speedup on: guix build libreoffice xmonad certbot -n --no-substitutes --no-build-hook * guix/derivations.scm (derivation->string): Rename to... (derivation->bytevector): ... this. Use 'open-bytevector-output-port' instead of 'call-with-output-string'. (derivation-hash): Remove string-to-bytevector conversion before 'sha256' call. (build-expression->derivation): Use 'add-data-to-store' and an bytevector port instead of a string port for the expression.
* derivations: Do not fetch narinfos for non-substitutable items.Ludovic Courtès2017-03-28
| | | | | | | | | | | | This avoids connections to substitute servers for derivations that are not substitutable anyway, such as profiles. Reported by Andy Wingo. * guix/derivations.scm (substitution-oracle): Skip derivations that do not pass 'substitutable-derivation?'. * tests/derivations.scm ("substitution-oracle and #:substitute? #f"): New test.
* utils: Move base16 procedures to (guix base16).Ludovic Courtès2017-03-16
| | | | | | | | | | | | | | | * guix/utils.scm (bytevector->base16-string, base16-string->bytevector): Move to... * guix/base16.scm: ... here. New file. * tests/utils.scm ("bytevector->base16-string->bytevector"): Move to... * tests/base16.scm: ... here. New file. * Makefile.am (MODULES): Add guix/base16.scm. (SCM_TESTS): Add tests/base16.scm. * build-aux/download.scm, guix/derivations.scm, guix/docker.scm, guix/import/snix.scm, guix/pk-crypto.scm, guix/scripts/authenticate.scm, guix/scripts/download.scm, guix/scripts/hash.scm, guix/store.scm, tests/hash.scm, tests/pk-crypto.scm: Adjust imports accordingly.
* Use 'mlambda' instead of 'memoize'.Ludovic Courtès2017-01-28
| | | | | | | | | | | | | | | | | * gnu/packages.scm (find-newest-available-packages): Use 'mlambda' instead of (memoize (lambda ...) ...). * gnu/packages/bootstrap.scm (package-with-bootstrap-guile): Likewise. * guix/build-system/gnu.scm (package-with-explicit-inputs)[rewritten-input]: Likewise. * guix/build-system/python.scm (package-with-explicit-python)[transform]: Likewise. * guix/derivations.scm (derivation->string): Likewise. * guix/gnu-maintenance.scm (gnu-package?): Likewise. * guix/modules.scm (module-file-dependencies): Likewise. * guix/scripts/graph.scm (standard-package-set): Likewise. * guix/scripts/lint.scm (official-gnu-packages*): Likewise. * guix/store.scm (store-regexp*): Likewise. * guix/utils.scm (location): Likewise.
* Add (guix memoization).Ludovic Courtès2017-01-28
| | | | | | | | | | | | | * guix/combinators.scm (memoize): Remove. * guix/memoization.scm: New file. * Makefile.am (MODULES): Add it. * gnu/packages.scm, gnu/packages/bootstrap.scm, guix/build-system/gnu.scm, guix/build-system/python.scm, guix/derivations.scm, guix/gnu-maintenance.scm, guix/import/cran.scm, guix/import/elpa.scm, guix/modules.scm, guix/scripts/build.scm, guix/scripts/graph.scm, guix/scripts/lint.scm, guix/store.scm, guix/utils.scm: Adjust imports accordingly.
* derivations: Make <derivation> record datatype immutable.Mathieu Lirzin2017-01-11
| | | | | * guix/derivations.scm (<derivation>): Make it immutable. (derivation): Use generic 'set-field' instead of ad-hoc functional setter.
* derivations: Share a cache between 'derivation' and 'read-derivation'.Ludovic Courtès2017-01-05
| | | | | | | | | This leads a 13% speedup on 'guix build libreoffice -d' and 18% on 'guix build gnome -d'. * guix/derivations.scm (%derivation-cache): New variable. (read-derivation): Use it instead of the private 'cache' variable. (derivation): Populate %DERIVATION-CACHE before returning.
* derivations: Micro-optimize 'write-derivation'.Ludovic Courtès2017-01-05
| | | | | | | * guix/derivations.scm (write-derivation)[write-input]: Use 'display' instead of 'write' for PATH. Use 'simple-format' instead of 'format', and '~a' instead of '~s' for SYSTEM and BUILDER.
* derivations: Add 'raw-derivation'.Ludovic Courtès2016-11-19
| | | | | | * guix/derivations.scm (raw-derivation): New procedure. * guix/download.scm (raw-derivation): Remove. * guix/gexp.scm (raw-derivation): Remove.
* Use (ice-9 binary-ports) instead of (rnrs io ports).Ludovic Courtès2016-10-19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | This reduces the closure of (guix ui) from 123 to 106 modules. * guix/derivations.scm: Use (ice-9 binary-ports) instead of (rnrs io ports). (map-derivation)[substitute-file]: Use 'read-string' instead of 'get-string-all'. * guix/ftp-client.scm: Likewise. * guix/hash.scm: Likewise. * guix/http-client.scm: Likewise. * guix/pki.scm (ensure-acl, current-acl): Likewise. * guix/scripts/archive.scm (authorize-key)[read-key]: Likewise. * guix/scripts/authenticate.scm (read-canonical-sexp) (read-hash-data): Likewise. * guix/scripts/download.scm: Likewise. * guix/scripts/offload.scm (register-gc-root, remove-gc-roots) (send-files): Likewise. * guix/scripts/publish.scm (lazy-read-file-sexp): Likewise. * guix/scripts/refresh.scm: Likewise. * guix/scripts/substitute.scm (check-acl-initialized): Likewise. * guix/serialization.scm (read-maybe-utf8-string): Likewise. * guix/scripts/hash.scm (guix-hash): Use 'force-output' instead of 'flush-output-port'. * guix/store.scm (process-stderr): Likewise. * guix/tests.scm: Likewise. * guix/utils.scm: Use (ice-9 binary-ports) and autoload (rnrs io ports) for 'make-custom-binary-input-port'.
* derivations: Export 'fixed-output-path'.Ludovic Courtès2016-07-20
| | | | | | * guix/derivations.scm (fixed-output-path): Change 'output', 'hash-algo', and 'recursive?' to keyword parameters. Export. (derivation): Adjust accordingly.
* derivations: 'derivation' sorts items in the resulting object.Ludovic Courtès2016-05-21
| | | | | | | | | | | | * guix/derivations.scm (derivation-input<?): New procedure. (write-derivation)[coalesce-duplicate-inputs]: Remove. Remove calls to 'sort'. (coalesce-duplicate-inputs): New procedure. (derivation-hash): Sort INPUTS and use 'coalesce-duplicate-inputs'. (derivation)[input->derivation-input] [coalesce-duplicate-inputs]: New procedures. Sort OUTPUTS, INPUTS, and ENV-VARS. * tests/derivations.scm ("read-derivation vs. derivation"): New test.
* utils: Move combinators to (guix combinators).Ludovic Courtès2016-05-04
| | | | | | | | | | | | | | | | | | | * guix/utils.scm (compile-time-value, memoize, fold2) (fold-tree, fold-tree-leaves): Move to... * guix/combinators: ... here. New file. * tests/utils.scm ("fold2, 1 list", "fold2, 2 lists") (fold-tree tests): Move to... * tests/combinators.scm: ... here. New file. * Makefile.am (MODULES, SCM_TESTS): Add them. * gnu/packages.scm, gnu/packages/bootstrap.scm, gnu/services/herd.scm, guix/build-system/gnu.scm, guix/build-system/python.scm, guix/derivations.scm, guix/gnu-maintenance.scm, guix/import/elpa.scm, guix/scripts/archive.scm, guix/scripts/build.scm, guix/scripts/graph.scm, guix/scripts/lint.scm, guix/scripts/size.scm, guix/scripts/substitute.scm, guix/serialization.scm, guix/store.scm, guix/ui.scm: Adjust imports accordingly.
* derivations: Raise an error when a module file is not found.Ludovic Courtès2016-03-23
| | | | | | | | | | | | Suggested by Jookia. * guix/derivations.scm (&file-search-error): New error condition. (search-path*): Raise it when 'search-path' returns #f. * guix/gexp.scm (search-path*): Remove. * guix/ui.scm (call-with-error-handling): Add case for 'file-search-error?'. * tests/derivations.scm ("build-expression->derivation and invalid module name"): New test.
* derivations: Add 'module->source-file-name'.Ludovic Courtès2016-03-23
| | | | | | * guix/derivations.scm (module->source-file-name): New procedure. (%imported-modules): Use it. * guix/gexp.scm (imported-modules): Likewise.
* derivations: Add #:disallowed-references.Ludovic Courtès2016-03-20
| | | | | | | | | * guix/derivations.scm (derivation): Add #:disallowed-references. [user+system-env-vars]: Honor it. (build-expression->derivation): Likewise. * tests/derivations.scm ("derivation #:disallowed-references, ok") ("derivation #:disallowed-references, not ok"): New tests. * doc/guix.texi (Derivations): Adjust accordingly.
* derivations: Move grafts to (guix grafts).Ludovic Courtès2016-02-22
| | | | | | | | | | | | * guix/derivations.scm (<graft>, graft-derivation, %graft?) (set-grafting): Move to... * guix/grafts.scm: ... here. New file. * guix/gexp.scm, guix/packages.scm, tests/packages.scm, guix/scripts/build.scm: Use it. * Makefile.am (MODULES): Add it. (SCM_TESTS): Add tests/grafts.scm. * tests/derivations.scm ("graft-derivation"): Move to... * tests/grafts.scm: ... here. New file.
* guix build: Add '--check'.Ludovic Courtès2015-12-09
| | | | | | | | | | | * guix/derivations.scm (build-derivations): Add optional 'mode' parameter. * guix/scripts/build.scm (%default-options): Add 'build-mode'. (show-help, %options): Add '--check'. (guix-build): Honor 'build-mode' key of OPTS. Pass it to 'show-what-to-build' and 'build-derivations'. * doc/guix.texi (Invoking guix build): Document it. (Substitutes): Mention it.
* derivations: Determine what's built in 'check' mode.Ludovic Courtès2015-12-09
| | | | | | | | | | | * guix/derivations.scm (substitution-oracle): Add #:mode parameter and honor it. (derivation-prerequisites-to-build): Likewise. [derivation-built?]: Take it into account. * guix/ui.scm (show-what-to-build): Add #:mode parameter. Pass it to 'substitute-oracle' and 'derivations-prerequisites-to-build'. * tests/derivations.scm ("derivation-prerequisites-to-build in 'check' mode"): New test.
* derivations: Improve docstring of 'substitution-oracle'.Ludovic Courtès2015-07-22
| | | | * guix/derivations.scm (substitution-oracle): Improve docstring.
* derivations: Improve complexity of 'substitution-oracle'.Ludovic Courtès2015-07-22
| | | | | * guix/derivations.scm (substitution-oracle): Use a final 'concatenate' instead of repeated 'append's.
* derivations: Add #:substitutable?, distinguished from #:local-build?.Ludovic Courtès2015-07-03
| | | | | | | | | | | | | | | | | | | | Fixes <http://bugs.gnu.org/18747>. * guix/derivations.scm (substitutable-derivation?): Rewrite to check for "allowSubstitutes". (derivation): Add #:substitutable? parameter. [user+system-env-vars]: Honor it. (build-expression->derivation): Add #:substitutable? and honor it. * guix/gexp.scm (gexp->derivation): Likewise. * tests/derivations.scm ("derivation-prerequisites-to-build and substitutes, non-substitutable build"): Use #:substitutable? instead of #:local-build?. ("substitutable-derivation?", "derivation-prerequisites-to-build and substitutes, local build"): New tests. * guix/download.scm (url-fetch): Adjust comment. * guix/git-download.scm (git-fetch): Likewise. * guix/build-system/gnu.scm (gnu-build, gnu-cross-build): Use #:substitutable? instead of #:local-build?. * doc/guix.texi (Derivations, G-Expressions): Adjust accordingly.
* derivations: Add #:leaked-env-vars parameter.Ludovic Courtès2015-05-01
| | | | | | | | | | | Suggested by Joshua Randall <jcrandall@alum.mit.edu> in <http://bugs.gnu.org/20402>. * guix/derivations.scm (derivation): Add #:leaked-env-vars parameter. [user+system-env-vars]: Honor it. * guix/gexp.scm (gexp->derivation): Add #:leaked-env-vars and pass it to 'raw-derivation'. * doc/guix.texi (Derivations, G-Expressions): Adjust accordingly.
* derivations: 'substitution-oracle' now ignores sub-trees that are valid.Ludovic Courtès2015-03-25
| | | | | | | | | | | Before that, "guix build qt", when only qt itself is missing, would lead 'substitution-oracle' to call 'substitutable-paths' with 318 items. Now, this is down to 6 items, because it doesn't ask about prerequisites that are already valid. * guix/derivations.scm (substitution-oracle)[valid-input?, dependencies]: New procedures. Use 'dependencies' and remove call to 'remove'.
* derivations: Add a 'cut?' parameter to 'derivation-prerequisites'.Ludovic Courtès2015-03-25
| | | | | | | * guix/derivations.scm (valid-derivation-input?): New procedure. (derivation-prerequisites): Add 'cut?' parameter and honor it. * tests/derivations.scm ("derivation-prerequisites and derivation-input-is-valid?"): New test.
* derivations: Don't invoke the substituter when an item is already in store.Ludovic Courtès2015-03-24
| | | | | | | | Fixes <http://bugs.gnu.org/20188>. Reported by Mark H Weaver <mhw@netris.org>. * guix/derivations.scm (substitution-oracle): Add 'valid?' procedure. Remove 'valid?' items from PATHS.
* packages: Move grafting parameter to (guix derivations).Ludovic Courtès2015-03-17
| | | | | * guix/packages.scm (%graft?, set-grafting): Move to... * guix/derivations.scm: ... here.
* gexp: Implement 'imported-modules' & co. using 'gexp->derivation'.Ludovic Courtès2015-02-13
| | | | | | | | | | | | | * guix/derivations.scm (imported-files): Keep private. (%imported-modules, %compiled-modules, build-expression->derivation): Mark as deprecated. (imported-modules, compiled-modules): Remove. * guix/gexp.scm (%mkdir-p-definition): New variable. (imported-files, search-path*, imported-modules, compiled-modules): New procedures. * tests/derivations.scm ("imported-files"): Remove. * tests/gexp.scm ("imported-files", "gexp->derivation #:modules"): New tests.
* derivations: Make the "grafting..." message directly visible.Ludovic Courtès2015-02-11
| | | | | * guix/derivations.scm (graft-derivation)[build]: Add call to 'force-output'.
* store: Remove 'build-derivations'.Ludovic Courtès2015-02-02
| | | | | | | * guix/store.scm (build-derivations): Remove. * guix/derivations.scm (build-derivations): Write in terms of 'build-things'. * doc/guix.texi (Invoking guix build): Adjust text accordingly.
* derivations: Raise an error for references to non-existent outputs.Ludovic Courtès2015-01-24
| | | | | | | | | | | | | | | Fixes <http://bugs.gnu.org/19630>. Reported by Ricardo Wurmus <ricardo.wurmus@mdc-berlin.de>. * guix/derivations.scm (&derivation-error, &derivation-missing-output-error): New error conditions. (derivation->output-path): Raise a '&derivation-missing-output-error' if OUTPUT is not an output of DRV. * guix/ui.scm (call-with-error-handling): Add case for 'derivation-missing-output-error?'. (show-what-to-build): Check whether (derivation-outputs drv) is empty. * tests/packages.scm ("reference to non-existent output"): Add test.
* monads: Move '%store-monad' and related procedures where they belong.Ludovic Courtès2015-01-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This turns (guix monads) into a generic module for monads, and moves the store monad and related monadic procedures in their corresponding module. * guix/monads.scm (store-return, store-bind, %store-monad, store-lift, text-file, interned-file, package-file, package->derivation, package->cross-derivation, origin->derivation, imported-modules, compiled, modules, built-derivations, run-with-store): Move to... * guix/store.scm (store-return, store-bind, %store-monad, store-lift, text-file, interned-file): ... here. (%guile-for-build): New variable. (run-with-store): Moved from monads.scm. Remove default value for #:guile-for-build. * guix/packages.scm (default-guile): Export. (set-guile-for-build): New procedure. (package-file, package->derivation, package->cross-derivation, origin->derivation): Moved from monads.scm. * guix/derivations.scm (%guile-for-build): Remove. (imported-modules): Rename to... (%imported-modules): ... this. (compiled-modules): Rename to... (%compiled-modules): ... this. (built-derivations, imported-modules, compiled-modules): New procedures. * gnu/services/avahi.scm, gnu/services/base.scm, gnu/services/dbus.scm, gnu/services/dmd.scm, gnu/services/networking.scm, gnu/services/ssh.scm, gnu/services/xorg.scm, gnu/system/install.scm, gnu/system/linux-initrd.scm, gnu/system/shadow.scm, guix/download.scm, guix/gexp.scm, guix/git-download.scm, guix/profiles.scm, guix/svn-download.scm, tests/monads.scm: Adjust imports accordingly. * guix/monad-repl.scm (default-guile-derivation): New procedure. (store-monad-language, run-in-store): Use it. * build-aux/hydra/gnu-system.scm (qemu-jobs): Add explicit 'set-guile-for-build' call. * guix/scripts/archive.scm (derivation-from-expression): Likewise. * guix/scripts/build.scm (options/resolve-packages): Likewise. * guix/scripts/environment.scm (guix-environment): Likewise. * guix/scripts/system.scm (guix-system): Likewise. * doc/guix.texi (The Store Monad): Adjust module names accordingly.
* derivations: Use a set for 'substitution-oracle'.Ludovic Courtès2015-01-11
| | | | * guix/derivations.scm (substitution-oracle): Use sets instead of lists.
* derivations: Use sets for 'derivations-prerequisites'.Ludovic Courtès2015-01-11
| | | | | | | | This yields a 46% improvement in 'derivation-prerequisites' invocations on the Emacs derivation. * guix/derivations.scm (derivation-prerequisites): Add 'input-set' variable, and use it in iterations.
* derivations: Add 'substitution-oracle' and use it.Ludovic Courtès2015-01-10
| | | | | | | | | | | | | | | | | | This makes 'guix environment PACKAGE' significantly faster when substitutes are enabled. Before that, it would lead to many invocations of 'guix substitute-binary', one per 'derivation-prerequisites-to-build' call. Now, all these are replaced by a single invocation. * guix/derivations.scm (derivation-output-paths, substitution-oracle): New procedures. (derivation-prerequisites-to-build): Replace #:use-substitutes? with #:substitutable?. Remove the local 'derivation-output-paths' and 'substitutable?'. * guix/ui.scm (show-what-to-build): Add 'substitutable?'. Pass it to 'derivation-prerequisites-to-build'. [built-or-substitutable?]: Use it instead of 'has-substitutes?'. * tests/derivations.scm ("derivation-prerequisites-to-build and substitutes"): Use #:substitutable? instead of #:use-substitutes?.
* derivations: Add 'derivation-output-names'.Ludovic Courtès2015-01-09
| | | | | | | * guix/derivations.scm (derivation-output-names): New procedure. (derivation-prerequisites-to-build): Use it for #:outputs. (map-derivation): Likewise. * tests/derivations.scm ("derivation-output-names"): New test.
* derivations: Export 'derivation-builder'.Ludovic Courtès2014-12-02
| | | | * guix/derivations.scm: Export 'derivation-builder'.
* derivations: Clarify message produced by 'graft-derivation'.Ludovic Courtès2014-11-13
| | | | | * guix/derivations.scm (graft-derivation): Use the term "grafting" in the build message.
* derivations: Add 'derivation-name'.Ludovic Courtès2014-11-02
| | | | | * guix/derivations.scm (derivation-name): New procedure. * tests/derivations.scm ("derivation-name"): New test.
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