Merge branch 'core-updates'

tests: Adjust snippet test to '.file_list' hack.

This is a followup to commit 140b4bc.

* tests/packages.scm ("package-source-derivation, snippet")[source]: Add
  'chmod' call for "..".

Merge branch 'master' into core-updates

guix: packages: Add origin-actual-file-name.

* guix/scripts/graph.scm (uri->file-name, node-full-name): Move origin file
  name logic to...
* guix/packages.scm (origin-actual-file-name): ...here.
* tests/packages.scm ("origin-actual-file-name")
  ("origin-actual-file-name, file-name"): New tests.

Merge branch 'master' into core-updates

guix: packages: Add transitive-input-references.

* guix/packages.scm (transitive-input-references): New procedure.
* gnu/packages/version-control.scm (package-transitive-propagated-labels*)
  (package-propagated-input-refs): Delete.
  (git)[arguments]: Adjust to transitive-input-references.

Merge branch 'core-updates'

packages: Rewrite 'transitive-inputs' to be linear and remove duplicates.

There were two issues:

  1. Use of 'delete-duplicates', which is quadratic, was a serious problem for
     closures with lots of propagated inputs, such as that of the 'hydra'
     package (several minutes for 'guix build hydra -n'!).

  2. The 'delete-duplicates' call essentially had no effect since duplicate
     inputs typically had a different label and were thus kept.  For
     instance, (bag-transitive-inputs (package->bag inkscape)) would return
     216 items whereas (delete-duplicates (map cdr THAT)) contains only 67
     items.

     The new implementation returns 67 items in this case.  For 'hydra', we're
     down from 42211 items to 361, and roughly 13s for 'guix build hydra'.

* guix/packages.scm (transitive-inputs): Rewrite as a breadth-first
  traversal.  Remove duplicate propagated inputs.
* tests/packages.scm ("package-transitive-inputs", "package->bag, propagated
  inputs"): Adjust to use simple labels for propagated inputs, without "/".
  ("package-transitive-inputs, no duplicates"): New test.

Merge branch 'master' into core-updates

Merge branch 'master' into gtk-rebuild

Conflicts:
	gnu/packages/gtk.scm

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.