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* tests: Make tests inside container reproducible.Andrew Tropin2022-08-05
| | | | | | * tests/guix-home.sh: Make tests inside container reproducible. Signed-off-by: Ludovic Courtès <ludo@gnu.org>
* services: configuration: Step back from *unspecified*.Maxim Cournoyer2022-08-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fixes <https://issues.guix.gnu.org/56799>. This partially reverts 8cb1a49a3998c39f315a4199b7d4a121a6d66449. Rationale: *unspecified* cannot be serialized thus used as a G-Expression input, which is problematic/inconvenient when using deeply nested records. As an example, jami-service-type was broken when using partially defined <jami-account> records. * gnu/services/configuration.scm (define-maybe-helper): Check against the 'unset symbol. (normalize-field-type+def): Adjust value to 'unset. (define-configuration-helper): Use 'unset as the default value thunk. * gnu/services/file-sharing.scm (serialize-maybe-string): Check against the 'unset symbol. (serialize-maybe-file-object): Likewise. * gnu/services/messaging.scm (define-all-configurations): Use 'unset as value. (raw-content?): Check against 'unset symbol. (prosody-configuration)[http-max-content-size]: Default to 'unset. [http-external-url]: Likewise. [mod-muc]: Likewise. [raw-content]: Likewise. * gnu/services/networking.scm (opendht-configuration): Adjust documentation. * gnu/services/telephony.scm (jami-shepherd-services): Replace *undefined* with the 'unset symbol. * tests/services/configuration.scm ("maybe type, no default"): Check against the 'unset symbol. * doc/guix.texi: Regenerate the opendht-configuration, openvpn-client-configuration and openvpn-server-configuration documentation.
* tests: Adjust texlive importer tests.Ricardo Wurmus2022-07-22
| | | | | | This is a follow-up to commit be7b314f3fe22273e935accac22f313e44d3d970. * tests/texlive.scm: Add version field to expected output.
* home: services: environment-variables: Double-quote values.Ludovic Courtès2022-07-14
| | | | | | | | | | | | | | Fixes <https://issues.guix.gnu.org/54469>. Reported by Maxime Devos <maximedevos@telenet.be>. * gnu/home/services.scm (environment-variable-shell-definitions): New procedure, with code formerly in 'serialize-posix-env-vars'. (environment-variables->setup-environment-script): Change "setup-environment" from 'mixed-text-file' to 'computed-file', and use 'environment-variable-shell-definitions'. * tests/guix-home.sh: Test it. * gnu/home/services/shells.scm (serialize-posix-env-vars): Delegate to 'environment-variable-shell-definitions'.
* home: services: shells: Double-quote environment variable values.Ludovic Courtès2022-07-14
| | | | | | | | | | | | Fixes <https://issues.guix.gnu.org/56540>. Until now, environment variable values were emitted unquoted, producing invalid shell code if the value contains spaces for example. * gnu/home/services/shells.scm (serialize-posix-env-vars): Define 'shell-quote' procedure in staged code and use it for #$value. * tests/guix-home.sh: Add test for PS1 variable with a value containing spaces.
* tests: build-emacs-utils: Allow test to pass on Emacs 27 too.Maxim Cournoyer2022-07-13
| | | | | | * tests/build-emacs-utils.scm ("emacs-batch-script: raise &emacs-batch-error on failure"): More loosely match expected error string, which differs between Emacs 27 and Emacs 28.
* monads: Add 'mparameterize'.Ludovic Courtès2022-07-10
| | | | | | | * etc/system-tests.scm (mparameterize): Move to... * guix/monads.scm (mparameterize): ... here. * tests/monads.scm ("mparameterize"): New test. * .dir-locals.el (c-mode): Add it.
* profiles: Support the creation of profiles with version 3 manifests.Ludovic Courtès2022-07-08
| | | | | | | | | | | | * guix/profiles.scm (%manifest-format-version): New variable. (manifest->gexp): Add optional 'format-version' parameter. [optional, entry->gexp]: Honor it. (profile-derivation): Add #:format-version parameter and honor it. (<profile>)[format-version]: New field. (profile-compiler): Honor it. * guix/build/profiles.scm (manifest-sexp->inputs+search-paths): Support both versions 3 and 4. Remove unused 'properties' variable. * tests/profiles.scm ("profile-derivation format version 3"): New test.
* guix: inferior: Fix the behaviour of open-inferior #:error-port.Christopher Baines2022-07-08
| | | | | | | | | | | I'm looking at this as the Guix Data Service uses this behaviour to record and display logs from inferior processes. * guix/inferior.scm (open-bidirectional-pipe): Call dup2 for file descriptor 2, passing either the file number for the current error port, or a file descriptor for /dev/null. * tests/inferior.scm ("#:error-port stderr", "#:error-port pipe"): Add two new tests that cover some of the #:error-port behaviour.
* tests: telephony: Remove obsolete parsing tests.Maxim Cournoyer2022-07-07
| | | | | | | | | | | | | | | | | Fixes <https://issues.guix.gnu.org/56343>. * tests/services/telephony.scm (parse-dbus-reply, parse-account-ids) (parse-account-details, parse-contacts, getAccountList-reply): Delete procedures. ("parse-account-ids"): Delete test. (getAccountDetails-reply): Delete procedure. ("parse-account-details; username, alias and display name"): Delete test. (getContacts-reply): Delete procedure. ("parse-account-contacts"): Delete test. (getContacts-empty-reply): Delete procedure. ("parse-account-contacts, empty array"): Delete test. Reported-by: Ludovic Courtès <ludo@gnu.org>
* style: For 'let' and similar forms, emit one binding per line.Ludovic Courtès2022-07-04
| | | | | | | | | | | | | | | | | | Previously, 'let' bindings could be rendered like this: (let ((x 1) (y 2) (z 3)) ...) With this change, each bindings goes in its own line. Partly fixes <https://issues.guix.gnu.org/56297>. Reported by Maxime Devos <maximedevos@telenet.be>. * guix/scripts/style.scm (pretty-print-with-comments)[list-of-lists?]: New procedure. Use it. * tests/style.scm: Add tests with 'let' and 'substitute-keyword-arguments'.
* tests: Adjust 'guix graph' test to latest OCaml changes.Ludovic Courtès2022-07-01
| | | | | * tests/graph.scm ("reverse bag DAG"): Adjust to latest OCaml changes by looking at dune/ocaml-camomile/ocaml-utop.
* profiles: Do not repeat entries in 'manifest' file.Ludovic Courtès2022-07-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fixes <https://issues.guix.gnu.org/55499>. Reported by Ricardo Wurmus <rekado@elephly.net>. With this change, the manifest file created for: guix install r r-seurat r-cistopic r-monocle3 r-cicero-monocle3 r-assertthat goes from 5.7M to 176K. Likewise, on this profile, wall-clock time of: GUIX_PROFILING=gc guix package -I goes from 0.7s to 0.1s, with heap usage going from 55M to 9M. * guix/profiles.scm (manifest->gexp)[optional]: New procedure. [entry->gexp]: Turn into a monadic procedure. Return a 'repeated' sexp if ENTRY was already visited before. Adjust caller accordingly. Bump manifest version. (sexp->manifest)[sexp->manifest-entry]: Turn into a monadic procedure. Add case for 'repeated' nodes. Add each entry to the current state vhash. Add clause for version 4 manifests. [sexp->manifest-entry/v3]: New procedure, with former 'sexp->manifest-entry' code. * tests/profiles.scm ("deduplication of repeated entries"): New test. * guix/build/profiles.scm (manifest-sexp->inputs+search-paths)[let-fields]: New macro. Use it. Expect version 4. Add clause for 'repeated' nodes.
* tests: Augment profile collision test.Ludovic Courtès2022-07-01
| | | | | * tests/profiles.scm ("collision of propagated inputs"): Check the parents of ENTRY1 and ENTRY2.
* tests: Add sanitizer test.Ludovic Courtès2022-07-01
| | | | | * tests/records.scm ("define-record-type* & sanitize without default value"): New test.
* status: Relay "updating substitutes" messages.Ludovic Courtès2022-06-26
| | | | | | | | | | | | | Until now, those messages would be accumulated and displayed all at once, when a '\n' was finally emitted by 'guix substitute'. In the meantime, clients would remain silent. * guix/status.scm (bytevector-index): Change 'number' parameter to 'numbers' and adjust accordingly. (build-event-output-port): Pass both #\newline and #\return to 'bytevector-index'. * tests/status.scm ("build-output-port, daemon messages with LF"): New test.
* status: Change tests from SRFI-11 to SRFI-71.Ludovic Courtès2022-06-26
| | | | * tests/status.scm: Use SRFI-71 'let' instead of SRFI-11 'let-values'.
* services: configuration: Report the location of field type errors.Ludovic Courtès2022-06-24
| | | | | | | | | | | | | | | | | Previously field type errors would be reported in a non-standard way, and without any source location information. This fixes it. * gnu/services/configuration.scm (configuration-field-error): Add a 'loc' parameter and honor it. Use 'formatted-message' instead of plain 'format'. (define-configuration-helper)[field-sanitizer]: New procedure. Use it. Use STEM as the identifier of the syntactic constructor of the record type. Add a 'sanitize' property to each field. Remove now useless STEM macro that would call 'validate-configuration'. * gnu/services/mail.scm (serialize-listener-configuration): Adjust to new 'configuration-field-error' prototype. * tests/services/configuration.scm ("wrong type for a field"): New test. * po/guix/POTFILES.in: Add gnu/services/configuration.scm.
* style: Keep values next to their keyword.Ludovic Courtès2022-06-22
| | | | | | | | | This ensures we print '#:key value' rather than insert a newline between '#:key' and 'value' as was the case before. * guix/scripts/style.scm (pretty-print-with-comments)[print-sequence]: When ITEM is a keyword, loop with FIRST? = true. * tests/style.scm: Add test.
* guix: emacs-utils: Add emacs-header-parse.Fredrik Salomonsson2022-06-17
| | | | | | | | | | * guix/build/emacs-utils.scm (emacs-header-parse): New procedure. * tests/build-emacs-utils.scm ("emacs-header-parse: fetch version", "emacs-header-parse: fetch keywords", "emacs-header-parse: fetch nonexistent author"): New tests. Signed-off-by: Ludovic Courtès <ludo@gnu.org>
* guix: emacs-utils: Add emacs-batch-script.Fredrik Salomonsson2022-06-17
| | | | | | | | | | * guix/build/emacs-utils.scm (emacs-batch-script): New procedure. * tests/build-emacs-utils.scm: New file. * Makefile.am (TESTS): Add `tests/build-emacs-utils.scm'. Signed-off-by: Ludovic Courtès <ludo@gnu.org>
* ui: Improve pager selection logic when less is not installed.Taiju HIGASHI2022-06-16
| | | | | | | | | | | | | | | | * guix/ui.scm (find-available-pager): New procedure. (call-with-paginated-output-port): Use it. * guix/utils.scm (call-with-environment-variables): Allow clearing of specified environment variables. * tests/ui.scm (make-empty-file, assert-equals-find-available-pager): New procedures. ("find-available-pager, GUIX_PAGER takes precedence") ("find-available-pager, PAGER takes precedence") ("find-available-pager, 'less' takes precedence") ("find-available-pager, 'more' takes precedence") ("find-available-pager, no pager"): New tests. Co-authored-by: Ludovic Courtès <ludo@gnu.org>
* shell: Fix '--export-manifest' for cached profiles and when '-p' is used.Ludovic Courtès2022-06-16
| | | | | | | | Fixes <https://issues.guix.gnu.org/55521>. * guix/scripts/shell.scm (export-manifest): When computing 'manifest', honor the 'profile key. * tests/guix-shell-export-manifest.sh: Add test.
* import: Add hex.pm importer.Hartmut Goebel2022-06-15
| | | | | | | | | | | | | hex.pm is a package repository for Erlang and Elixir. * guix/scripts/import.scm (importers): Add "hexpm". * guix/scripts/import/hexpm.scm, guix/import/hexpm.scm, guix/hexpm-download.scm: New files. * guix/import/utils.scm (source-spec->object): Add "hexpm-fetch" to list of fetch methods. * guix/upstream.scm (package-update/hexpm-fetch): New function. (%method-updates) Add it. * Makefile.am: Add them.
* services: configuration: Use *unspecified* instead of 'disabled.Attila Lendvai2022-06-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use *unspecified* as a marker for field values that have not been set. Rationale: 'disabled may easily clash with user values for boolean fields, is confusing (i.e. its meaning is *not* boolean false, but unspecified) and it also passes silently through the symbol? predicate of a field of type symbol. * gnu/services/configuration.scm (configuration-missing-default-value): Renamed from configuration-no-default-value. (define-maybe-helper): Use *unspecified* instead of 'disabled, and make the default value optional. * gnu/home/services/desktop.scm (home-redshift-configuration): Change (maybe-xyz 'disabled) to maybe-xyz. * gnu/services/authentication.scm (nslcd-configuration): Likewise. * gnu/services/cgit.scm (repository-cgit-configuration): Likewise. * gnu/services/file-sharing.scm (serialize-maybe-string) (serialize-maybe-file-object): Use 'unspecified?' instead of (eq? val 'disabled). * gnu/services/messaging.scm (raw-content?): Likewise. (ssl-configuration): Change (maybe-xyz 'disabled) to maybe-xyz. (prosody-configuration): Likewise. * gnu/services/file-sharing.scm (transmission-daemon-configuration): Likewise. * gnu/services/messaging.scm (define-all-configurations): Use *unspecified* instead of 'disabled'. * gnu/services/networking.scm (opendht-configuration): Likewise. * gnu/services/pm.scm (tlp-configuration): Likewise. * gnu/services/telephony.scm (jami-account): Likewise. (jami-configuration): Likewise. * gnu/services/vpn.scm (openvpn-client-configuration): Likewise. * tests/services/configuration.scm ("maybe type, no default") ("maybe type, with default"): New tests. Signed-off-by: Ludovic Courtès <ludo@gnu.org>
* services: configuration: Support (field1 maybe-number "") format.Attila Lendvai2022-06-15
| | | | | | | | | | | | | | | | | | As opposed to explicitly using 'disabled as value, or using the (field1 (maybe-number) "") format. It's mostly the work of Maxime Devos shared under #54674, with some modifications by Attila Lendvai. * gnu/services/configuration.scm (normalize-field-type+def): New function. (define-configuration-helper) (define-configuration): Support new field format. * tests/services/configuration.scm (config-with-maybe-number->string): New function. ("maybe value serialization of the instance"): New test. ("maybe value serialization of the instance, unspecified"): New test. Signed-off-by: Ludovic Courtès <ludo@gnu.org>
* system: <operating-system> compiler truly honors the 'system' argument.Ludovic Courtès2022-06-15
| | | | | | | | | | Fixes <https://issues.guix.gnu.org/55951>. * gnu/system.scm (operating-system-compiler): Parameterize '%current-system' and '%current-target-system' before calling 'operating-system-derivation'. * tests/system.scm ("lower-object, %current-system sensitivity"): New test.
* packages: Add 'specifications->packages'.Antero Mejr2022-06-06
| | | | | | | | | | | | * gnu/packages.scm (specifications->packages): New procedure. * guix/scripts/home/import.scm (manifest+configuration-files->code): Use it. * tests/home-import.scm (match-home-environment-no-services) (match-home-environment-no-services-nor-packages) (match-home-environment-bash-service) (match-home-environment-bash-service-with-alias): Adjust 'packages' field accordingly. Co-authored-by: Ludovic Courtès <ludo@gnu.org>
* import: hackage: Filter upper/mixed case dependencies too.Lars-Dominik Braun2022-06-06
| | | | | | | | | * guix/import/hackage.scm (filter-dependencies): Convert OWN-NAMES to lowercase before filtering. (hackage-module->sexp): Remove #f from OWN-NAMES, which is used for unnamed (default) libraries. * tests/hackage.scm (test-cabal-internal-library-ignored): Add mismatched uppercase letters.
* import: hackage: Filter internal libraries from inputs and native-inputs.Lars-Dominik Braun2022-06-06
| | | | | | | | | | | Fixes <https://issues.guix.gnu.org/54760>. * guix/import/hackage.scm (filter-dependencies): Support multiple OWN-NAMES. (hackage-module->sexp): Filter OWN-NAMES from HACKAGE-DEPENDENCIES and HACKAGE-NATIVE-DEPENDENCIES. * tests/hackage.scm (test-cabal-internal-library-ignored): New variable. ("hackage->guix-package test internal libraries are ignored"): New testcase.
* import: cabal: Support library namesLars-Dominik Braun2022-06-06
| | | | | | | | | | | | | | * guix/import/cabal.scm (make-cabal-parser): Add name to section. (is-lib): Add optional name to regular expression. (lex-rx-res): Support selecting different substring. (lex-lib): Match 2nd substring from IS-LIB. (lex-line): Adapt to changes for lex-lib. (cabal-library): Add name field and export CABAL-LIBRARY-NAME. (eval): Remove special case for 'library, which is not required any more. (make-cabal-section): Move special case for LIBRARY. * tests/hackage.scm (test-read-cabal-library-name): New variable. ("read-cabal test 1"): Adapt testcase to changed internal structure. ("read-cabal test: library name"): New testcase.
* import: cabal: Document failing syntax through tests.Lars-Dominik Braun2022-06-06
| | | | | | | * tests/hackage.scm (test-read-cabal-brackets-newline): New variable. (test-cabal-no-final-newline): Likewise. ("hackage->guix-package test without final newline", "read-cabal test: property brackets on new line"): New tests.
* import: cabal: Allow curly bracket before else statement.Lars-Dominik Braun2022-06-06
| | | | | | | * guix/import/cabal.scm (is-else): Turn into procedure. (lex-line): Move IS-ELSE… (lex-word): …here. * tests/hackage.scm (test-cabal-elif-brackets): Extend testcase.
* import: cabal: Allow properties without space between key and value.Lars-Dominik Braun2022-06-06
| | | | | | * guix/import/cabal.scm (lex-word): Add colon to delimiters. * tests/hackage.scm (test-cabal-property-no-space): New variable. ("hackage->guix-package test properties without space"): New test.
* import: cabal: Allow curly brackets in more positions.Lars-Dominik Braun2022-06-06
| | | | | | | | * guix/import/cabal.scm (is-layout-property): Do not expect end of line. (lex-layout-property): Check for newline. (lex-property): Stop reading on closing curly bracket. * tests/hackage.scm (test-read-cabal-2): New variable. ("read-cabal test: if brackets on the same line"): New test.
* import: cabal: Support elif statement.Lars-Dominik Braun2022-06-06
| | | | | | | | | | | | | | | | | | | Fixes <https://issues.guix.gnu.org/54752>. * guix/import/cabal.scm (make-cabal-parser): Replace if-then-else grammar case with elif-else, modify if-then accordingly. (is-elif): New procedure. (lex-elif): Likewise. (is-id): Add elif keyword. (lex-word): Add test for elif. * tests/hackage.scm (test-cabal-if): New variale. (test-cabal-else): Likewise. (test-cabal-elif): Likewise. (test-cabal-elif-brackets): Likewise. (match-ghc-elif): Likewise. ("hackage->guix-package test lonely if statement", "hackage->guix-package test else statement", "hackage->guix-package test elif statement", "hackage->guix-package test elif statement with brackets"): New tests.
* home: services: Add 'lookup-home-service-types' procedure.Ludovic Courtès2022-06-04
| | | | | | * gnu/home/services.scm (lookup-home-service-types): New procedure. * tests/home-services.scm: New file. * Makefile.am (SCM_TESTS): Add it.
* cache: Catch invalid 'last-expiry-cleanup'.zimoun2022-06-04
| | | | | | | | | | | | Fixes <http://issues.guix.gnu.org/55638>. * guix/cache.scm (maybe-remove-expired-cache-entries)[last-expiry-date]: Use 'get-string-all' + 'string->number' instead of 'read'; ignore invalid numbers. * tests/cache.scm ("maybe-remove-expired-cache-entries, empty cache") ("maybe-remove-expired-cache-entries, corrupted cache"): New tests. Co-authored-by: Ludovic Courtès <ludo@gnu.org>
* shell: '--export-manifest -D x -D y' generates a valid manifest.Ludovic Courtès2022-06-01
| | | | | | * guix/scripts/shell.scm (manifest->code*): Add missing 'list' in generated 'concatenate-manifests' call. * tests/guix-shell-export-manifest.sh: Add test.
* gnu: Remove python2-matplotlib.Maxim Cournoyer2022-05-31
| | | | | | * gnu/packages/python-xyz.scm (python2-matplotlib): Delete variable. * tests/profiles.scm ("package->manifest-entry, search paths"): Use python 3 matplotlib in test.
* tests: Adjust crate importer test to spdx changes.Ludovic Courtès2022-05-30
| | | | | | | This is a followup to 95b0544fcfa1a663435a9ac84db94312b938022b. * tests/crate.scm ("licenses: MIT/Apache-2.0 AND BSD-2-Clause"): Adjust expected result.
* tests: Fix wrong target triplets.Josselin Poiret2022-05-25
| | | | | | | | | | | | | | | | * tests/gexp.scm (ungexp + ungexp-native, input list + ungexp-native, input list splicing + ungexp-native-splicing, gexp list splicinng + ungexp-splicing, gexp->derivation, cross-compilation, gexp->derivation, ungexp-native, gexp->derivation, ungexp + ungexp-native, gexp->derivation, ungexp-native + composed gexps): Change mips64el-linux to mips64el-linux-gnu. * tests/guix-pack.sh: Change arm-unknown-linux-gnueabihf to arm-linux-gnueabihf. Signed-off-by: Mathieu Othacehe <othacehe@gnu.org>
* scripts: package: Transform before creating manifest entries.Josselin Poiret2022-05-23
| | | | | | | | | | | * guix/scripts/package.scm (options->installable): Add TRANSFORM argument, to be able to directly transform the new packages before creating their manifest entries. (process-actions): Remove transform-entry, and step3, transforming directly in step2. * tests/guix-package.sh: Add test. Signed-off-by: Ludovic Courtès <ludo@gnu.org>
* import: Add Elm importer.Philip McGrath2022-05-22
| | | | | | | | | | | * guix/import/elm.scm, guix/scripts/import/elm.scm: New files. * Makefile.am (MODULES): Add them. * guix/scripts/import.scm (importers): Add "elm". * doc/guix.texi (Invoking guix import): Document Elm importer. * doc/contributing.texi (Elm Packages): Mention it. * tests/elm.scm ("(guix import elm)"): New test group. Signed-off-by: Ludovic Courtès <ludo@gnu.org>
* guix: Add elm-build-system.Philip McGrath2022-05-22
| | | | | | | | | | | | | | * gnu/packages/patches/elm-offline-package-registry.patch: New file. * gnu/local.mk (dist_patch_DATA): Add it. * gnu/packages/elm.scm (elm): Use it. * guix/build-system/elm.scm, guix/build/elm-build-system.scm, tests/elm.scm: New files. * Makefile.scm (MODULES, SCM_TESTS): Add them. * doc/guix.texi (Build Systems): Document 'elm-build-system'. * doc/contributing.texi (Elm Packages): New section. Document naming conventions and utilities. Signed-off-by: Ludovic Courtès <ludo@gnu.org>
* inferior: Close duplicate socketpair file descriptor.Ludovic Courtès2022-05-20
| | | | | | * guix/inferior.scm (open-bidirectional-pipe): Pass SOCK_CLOEXEC to 'socketpair'. * tests/inferior.scm ("close-inferior"): Add test.
* tests: Ensure test OpenPGP keys never expire.Ludovic Courtès2022-05-18
| | | | | | | | | | All these keys had expiration dates. 'tests/keys/ed25519.pub' expired on 2022-04-24. Fixes <https://issues.guix.gnu.org/55506>. * tests/keys/ed25519.pub, tests/keys/ed25519-2.pub, tests/keys/ed25519-3.pub: Remove expiration date.
* services: Make <service-type> 'description' field mandatory.Ludovic Courtès2022-05-18
| | | | | * gnu/services.scm (<service-type>)[description]: Remove default value. * tests/services.scm: Add 'description' field to each 'service-type' form.
* transformations: Preserve transformation order in package property.Ludovic Courtès2022-05-05
| | | | | | | | | | Fixes <https://issues.guix.gnu.org/54942>. Reported by SeerLite <seerlite@nixnet.email>. * guix/transformations.scm (options->transformation) [package-with-transformation-properties]: Add call to 'reverse'. * tests/transformations.scm ("options->transformation, property order"): New test.
* gexp: Add 'references-file'.Ludovic Courtès2022-05-01
| | | | | | * gnu/services/base.scm (references-file): Remove. * guix/gexp.scm (references-file): New procedure. * tests/gexp.scm ("references-file"): New test.