gexp: Remove special meaning of forms (PACKAGE OUTPUT) in ungexp.

* guix/gexp.scm (gexp-inputs)[add-reference-inputs]: Remove clause for
  inputs of the form (PACKAGE OUTPUT).
  (gexp->sexp)[reference->sexp]: Likewise.
* tests/gexp.scm ("input list splicing"): Change 'list' to 'gexp-input'
  for glibc:debug.
  ("text-file*"): Likewise for %bootstrap-guile:out.
  ("input list splicing + gexp-input + ungexp-native-splicing"): Remove,
  now redundant.

gexp: Export 'gexp-input' constructor.

* guix/gexp.scm (<gexp-input>)[gexp-input]: Rename to...
  [%gexp-input]: ... this.  Adjust callers accordingly.
  (gexp-input): New procedure.
  (gexp-inputs)[add-reference-inputs]: When the input is a list, check
  whether each item is already 'gexp-input?' and to not rewrap those.
  (gexp-outputs)[add-reference-output]: Likewise.
  (gexp->sexp): Likewise.
* tests/gexp.scm ("input list splicing + gexp-input +
  ungexp-native-splicing"): New test.

gexp: Add <gexp-input>.

* guix/gexp.scm (<gexp-input>): New record type.
  (gexp-inputs)[add-reference-inputs]: Adjust clauses to expect
  <gexp-input> objects.
  (gexp-outputs)[add-reference-output]: Likewise.
  (gexp->sexp)[reference->sexp]: Likewise.
  (canonicalize-reference): Remove.
  (gexp)[escape->ref]: Use 'gexp-input' for all the references.
  Remove use of 'canonicalize-reference'.

tests: Add an indirection for white-box testing.

* tests/gexp.scm (gexp-inputs, gexp-native-inputs, gexp-outputs,
  gexp->sexp): Make an indirection, to facilitate live testing with
  Geiser.

services: Statically report duplicate dmd service identifiers.

Reported by 白い熊 @相撲道 <guix-devel_gnu.org@sumou.com>
at <http://lists.gnu.org/archive/html/guix-devel/2015-03/msg00264.html>.

* gnu/services/dmd.scm (assert-no-duplicates): New procedure.
  (dmd-configuration-file): Use it.
* po/guix/POTFILES.in: Add gnu/services/dmd.scm.
* tests/guix-system.sh (errorfile): Add test.

lint: Add tests for the 'source' checker.

* guix/scripts/lint.scm (check-source): Export.
* tests/lint.scm (%null-sha256): New procedure.
  ("source: 200", "source: 404"): New tests.

tests: Fix import.

* tests/lint.scm: Use 'url-fetch' from (guix download), not (guix build
  download), although this was actually harmless here.

store: Attempt to decode build logs as UTF-8.

* guix/serialization.scm (read-maybe-utf8-string): New procedure.
* guix/store.scm (process-stderr): Use it for the build log and errors.
* tests/store.scm ("current-build-output-port, UTF-8",
  "current-build-output-port, UTF-8 + garbage"): New tests.

tests: Remove dependency on 'glibc-utf8-locales' for profile tests.

This fixes a regression introduced in commit 536c3ee.

* guix/profiles.scm (ca-certificate-bundle): When MANIFEST is empty,
  make a trivial derivation.
* guix/scripts/package.scm (guix-package)[process-actions]: Pass
  #:ca-certificate-bundle? to 'profile-generation'.
* tests/packages.scm ("--search-paths with pattern"): Likewise.
* tests/profiles.scm ("profile-derivation"): Likewise.

Merge branch 'core-updates'.

gexp: Make sure 'gexp-outputs' removes duplicate outputs.

Fixes a regression introduced in f9efe56.

* guix/gexp.scm (gexp-outputs): Add call to 'delete-duplicates'.
* tests/gexp.scm ("output list, combined gexps, duplicate output"): New
  test.

gexp: Aggregate outputs of compound gexps.

* guix/gexp.scm (gexp-outputs)[add-reference-output]: Recurse into
  lists.
* tests/gexp.scm ("output list + ungexp-splicing list, combined gexps"):
  New test.

gexp: Add tests for 'gexp-outputs'.

* tests/gexp.scm (gexp-outputs): New procedure.
  ("output list", "output list, combined gexps"): New tests.

Merge branch 'master' into core-updates

ui: Honor --no-* options passed via $GUIX_BUILD_OPTIONS.

Reported by Alex Kost <alezost@gmail.com>
at <http://lists.gnu.org/archive/html/guix-devel/2015-02/msg00702.html>.

* guix/ui.scm (parse-command-line)[parse-options-from]: Add 'seeds'
  parameter.
  Thread the result of the first 'parse-options-from' call to the
  second.

ui: Factorize command-line + env. var. option parsing.

* guix/ui.scm (%default-argument-handler, parse-command-line): New
  procedures.
  (environment-build-options): Make private.
* guix/scripts/archive.scm (guix-archive)[parse-options,
  parse-options-from]: Remove.  Use 'parse-command-line' instead.
* guix/scripts/build.scm (guix-build): Likewise.
* guix/scripts/environment.scm (guix-environment): Likewise.
* guix/scripts/package.scm (guix-package): Likewise.
* guix/scripts/system.scm (guix-system): Likewise.
* tests/ui.scm (with-environment-variable): New macro.
  ("parse-command-line"): New test.

tests: Skip tests that would fail due to the shebang length.

Reported by Daniel Kochmański <dkochmanski@hellsgate.pl>.
Fixes <http://bugs.gnu.org/19888>.

* guix/tests.scm (shebang-too-long?): New procedure.
* tests/builders.scm ("gnu-build"): Conditionalize on
  not (shebang-too-long?).
* tests/packages.scm ("GNU Make, bootstrap"): Likewise.
* tests/guix-package.sh (shebang_not_too_long): New function.
  Use it to determine whether to build 'gnu-make-boot0'.

tests: Factorize the network reachability test.

* guix/tests.scm (network-reachable?): New procedure.
* tests/builders.scm (network-reachable?): Remove.
  Replace references to it with calls to the new 'network-reachable?'
  procedure.
* tests/derivations.scm (%coreutils): Use 'network-reachable?' instead
  of 'getaddrinfo'.
* tests/packages.scm: Likewise.
* tests/union.scm: Likewise.

import: cpan: Update tests for dependency handling.

* tests/cpan.scm (test-json): Remove core module dependencies.
  [cpan->guix-package]: Add mock url handling for module api.
  Adjust expected native-inputs and license.

gexp: Add #:graft? parameter to 'gexp->derivation'.

* guix/gexp.scm (gexp->derivation): Add #:graft? parameter and honor it.
* tests/gexp.scm ("gexp->derivation vs. grafts"): New test.
* doc/guix.texi (G-Expressions): Update 'gexp->derivation'
  documentation.