guix: packages: Add package-direct-sources and package-transitive-sources.

* guix/tests.scm (dummy-origin): New syntax.
* guix/packages.scm (package-direct-sources)
  (package-transitive-sources): New procedures.
* tests/packages.scm ("package-direct-sources, no source")
  ("package-direct-sources, #f source")
  ("package-direct-sources, not input source", "package-direct-sources")
  ("package-transitive-sources"): Test them.

Merge branch 'master' into core-updates.

tests: Select appropriate bootstrap guile version for current system.

* tests/packages.scm ("package-source-derivation, snippet"): Select appropriate
  guile-2.0.x.tar.xz tarball based on the value of (%current-system).

packages: Add 'supported-package?'.

* guix/packages.scm (supported-package?): New procedure.
* tests/packages.scm ("supported-package?"): New test.
* build-aux/hydra/gnu-system.scm (package->job): Use it instead of
  'package-transitive-supported-systems'.

Merge branch 'core-updates'

Merge branch 'master' into core-updates

Conflicts:
	gnu-system.am
	gnu/packages/gstreamer.scm

profiles: Generalize "hooks" for 'profile-derivation'.

* guix/profiles.scm (info-dir-file): Remove (null? (manifest-entries
  manifest)) test.
  (ca-certificate-bundle): Likewise.
  (ghc-package-cache-file): Turn 'if' into 'and', and remove second
  arm.
  (%default-profile-hooks): New variable.
  (profile-derivation): Remove #:info-dir?, #:ghc-package-cache?, and
  #:ca-certificate-bundle?.  Add #:hooks.  Iterate over HOOKS.  Adjust
  'inputs' accordingly.
* guix/scripts/package.scm (guix-package): Adjust 'profile-derivation'
  call accordingly.
* tests/packages.scm ("--search-paths with pattern"): Likewise.
* tests/profiles.scm ("profile-derivation",
  "profile-derivation, inputs"): Likewise.

packages: 'package-transitive-supported-systems' accounts for implicit inputs.

Reported by Federico Beffa.

* guix/packages.scm (package-transitive-supported-systems): Use
  bag-direct-inputs + package->bag rather than package-direct-inputs.
* tests/packages.scm ("package-transitive-supported-systems"): Add
  explicit 'build-system' field to each 'dummy-package' form.
  ("package-transitive-supported-systems, implicit inputs"): New test.

Merge branch 'master' into core-updates

profiles: Generate GHC's package database cache.

* guix/profiles.scm (ghc-package-cache-file): New procedure.
  (profile-derivation): Add 'ghc-package-cache?' keyword argument.  If true
  (the default), add the result of 'ghc-package-cache-file' to 'inputs'.
* guix/scripts/package.scm (guix-package)[process-actions]: Pass
  #:ghc-package-cache? to 'profile-generation'.
* tests/packages.scm ("--search-paths with pattern"): Likewise.
* tests/profiles.scm ("profile-derivation"): Likewise.

packages: Rewrite 'patch-and-repack' using gexps.

* guix/packages.scm (patch-and-repack): Remove 'store' parameter and
  change default value of #:inputs to (%standard-patch-inputs).
  [lookup-input, instantiate-patch]: New procedures.
  [patch-inputs]: Remove.
  [builder]: Rename to...
  [build]: ... this.  Use gexps instead of sexps.
  (patch-and-repack*): Remove.
  (origin->derivation): Use 'patch-and-repack' instead of
  'patch-and-repack*'.
* tests/packages.scm ("package-source-derivation,
  snippet")[source](snippet): Remove references to '%build-inputs' and
  '%outputs'.

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 'master' into core-updates

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.

tests: Disable grafts when comparing derivations.

Fixes a regression introduced with the grafting of Patch in 3f11f01.

* tests/packages.scm ("reference to non-existent output"): Wrap in
  'parameterize'.

derivations: Raise an error for references to non-existent outputs.

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.

gnu: 'search-patch' raises an error when a patch is not found.

* gnu/packages.scm (search-patch): Raise an error condition when
  'search-path' returns #f.
* tests/packages.scm ("patch not found yields a run-time error"): New
  test.

Merge branch 'core-updates'

Conflicts:
	gnu/packages/bootstrap.scm

packages: Convert source derivations to monadic style.

* guix/packages.scm (origin->derivation): Take body from
  'package-source-derivation', and change it to monadic style.  Expect
  METHOD to a monadic procedure.
  (package-source-derivation): Define in terms of 'origin->derivation'.
* guix/download.scm (url-fetch): Remove 'store' argument.  Remove
  'guile-for-build' variable.  Turn into a monadic procedure.
* guix/git-download.scm (git-fetch): Likewise.
* guix/svn-download.scm (svn-fetch): Likewise.
* tests/builders.scm (url-fetch*): New procedure.
  Change tests to call 'url-fetch*' instead of 'url-fetch'.
* tests/packages.scm ("package-source-derivation, snippet"): Remove
  'store' parameter of 'fetch' and change it to use 'interned-file'
  instead of 'add-to-store'.
* gnu/packages/bootstrap.scm (bootstrap-origin)[boot]: Remove 'store'
  parameter.