Add (guix sets).

* guix/sets.scm, tests/sets.scm: New files.sets
* Makefile.am (MODULES, SCM_TESTS): Add them.

import: Add CPAN importer.

* guix/import/cpan.scm, guix/scripts/import/cpan.scm, tests/cpan.scm:
  New files.
* Makefile.am (MODULE)[HAVE_GUILE_JSON]: Add them.
* guix/scripts/import.scm (importers): Add cpan.
* doc/guix.texi (Requirements): Mention `guix import cpan` as a user
  of guile-json.
  (Invoking guix import): Document new `guix import cpan` command.

import: Factorize utility functions.

* guix/import/pypi.scm (hash-table->alist, flatten, assoc-ref*,
  url-fetch, json-fetch): Pull procedures from here into...
* guix/import/utils.scm: Here and...
* guix/import/json.scm: Here.  New file.
* Makefile.am (MODULE)[HAVE_GUILE_JSON]: Add it.
* guix/import/gnu.scm (file-sha256): Move from here to...
* guix/hash.scm: Here.
* tests/pypi.scm (pypi->guix-package): Update mock module reference.

build: Make sure the installed 'config.go' is newer than 'config.scm'.

Fixes <http://bugs.gnu.org/19317>.
Reported by rekado <rekado@elephly.net>.

* gnu-system.am (install-data-hook): Rename to...
  (set-bootstrap-executable-permissions): ... this.
* Makefile.am (install-data-hook): New target.

Add (guix elf).

* guix/elf.scm: New file.  Taken from Guile 'master', commit 3f826e3.
* Makefile.am (MODULES): Add it.
* THANKS: Thank Andy, who wrote this module.

lint: Fold 'sync-descriptions' script as 'gnu-description' lint checker.

* build-aux/sync-descriptions.scm: Remove.  Move payload to...
* guix/scripts/lint.scm: ... here.
  (escape-quotes, official-gnu-packages*,
  check-gnu-synopsis+description): New procedures.
  (%checkers): Add 'gnu-descriptions'.
* Makefile.am (EXTRA_DIST): Remove build-aux/sync-descriptions.scm.
  (sync-descriptions): Use 'guix lint'.

build: Add guix/tests.scm to the distribution.

* Makefile.am (noinst_DATA): Rename to...
  (dist_noinst_DATA): ... this.

import: Add GNU importer.

Suggested by Karl Berry <karl@gnu.org>
and Andreas Enge <andreas@enge.fr>.

* guix/import/gnu.scm, guix/scripts/import/gnu.scm: New files.
* Makefile.am (MODULES): Add them.
* guix/scripts/import.scm (importers): Add "gnu".
* guix/gnu-maintenance.scm (gnu-release-archive-types): New procedure.
  (download-tarball): Export.

pull: Use the build procedure provided by the newly-downloaded Guix.

Fixes <http://bugs.gnu.org/18534>.

* guix/scripts/pull.scm (with-environment-variable, with-PATH): New
  macros.
  (temporary-directory, first-directory, interned-then-deleted): New
  procedures.
  (unpack): Rewrite to do the unpacking in the current process rather
  than as a separate derivation.
  (%self-build-file): New variable.
  (build-from-source): New procedure.
  (build-and-install): Use it.
* guix/build/pull.scm (build-guix): Rename 'tarball' argument to
  'source'.  Remove #:tar and #:gzip parameters, as well as 'tar'
  invocation.  Remove 'scandir' invocation.  Wrap body in
  'with-directory-excursion'.
* build-aux/build-self.scm: New file.
* Makefile.am (EXTRA_DIST): Add it.

guix lint: add the --checkers option.

* guix/scripts/lint.scm: add the "--checkers" option.
* doc/guix.texi (Invoking guix lint): Document it.
* tests/guix-lint.sh: New file
* Makefile.am (SCM_TESTS): Add it.

scripts: Add 'environment' command.

* guix/scripts/environment.scm: New file.
* Makefile.am (MODULES): Add it.
* doc/guix.texi ("Invoking guix environment"): New node.

gnu: Add the 'glib-or-gtk' build system.

* guix/build-system/glib-or-gtk.scm, guix/build/glib-or-gtk-build-system.scm:
  New files.
* Makefile.am (MODULES): Add them.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

derivations: Add 'graft-derivation'.

* guix/derivations.scm (graft-derivation): New procedure.
* guix/build/graft.scm: New file.
* Makefile.am (MODULES): Add it.
* tests/derivations.scm ("graft-derivation"): New test.

build: Build pypi modules only if 'guile-json' is available.

* Makefile.am (MODULES): Wrap 'guix/import/pypi.scm' and
  'guix/scripts/import/pypi.scm' in 'if HAVE_GUILE_JSON'.

import: Add PyPI importer.

* guix/snix.scm: Delete.
* guix/import/snix.scm: New file.
* guix/import/pypi.scm: New file.
* guix/import/utils.scm: New file.
* guix/scripts/import/nix.scm: New file.
* guix/scripts/import/pypi.scm: New file.
* tests/pypi.scm: New file.
* tests/snix.scm: Import (guix import snix) module.
* guix/scripts/import.scm (%default-options, %options): Delete.
  (%standard-import-options, importers): New variables.
  (show-help): List importers.
  (guix-import): Factor out Nix-specific logic.  Delegate to correct importer
  based upon first argument.
* configure.ac (HAVE_GUILE_JSON): New conditional.
* Makefile.am (MODULES): Add new files and remove 'guix/snix.scm'.
  (SCM_TESTS): Add 'tests/pypi.scm' if guile-json is installed.

build: Add ruby build system.

* guix/build-system/ruby.scm: New file.
* guix/build/ruby-build-system: New file.
* Makefile.am (MODULES): Add new files.
* doc/guix.texi (Build Systems): Document ruby-build-system.

Merge branch 'master' into core-updates

vm: Move store copy handling to (guix build store-copy).

* gnu/build/vm.scm (read-reference-graph, populate-store): Move to...
* guix/build/store-copy.scm: ... here.  New file.
* Makefile.am (MODULES): Add it.
* gnu/system/vm.scm (expression->derivation-in-linux-vm): Adjust default
  #:modules values accordingly.
* tests/gexp.scm ("gexp->derivation, store copy"): New test.

Add Emacs user interface.

* configure.ac (emacsuidir): New variable.
  (AC_CONFIG_FILES): Add 'emacs/guix-init.el', 'emacs/guix-helper.scm'.
* Makefile.am: Include 'emacs.am'.
* emacs.am: New file.
* doc/emacs.texi: New file.
* doc/guix.texi: Include 'emacs.texi'.
* emacs/guix-backend.el: New file.
* emacs/guix-base.el: New file.
* emacs/guix-helper.scm.in: New file.
* emacs/guix-history.el: New file.
* emacs/guix-info.el: New file.
* emacs/guix-init.el.in: New file.
* emacs/guix-list.el: New file.
* emacs/guix-main.scm: New file.
* emacs/guix-utils.el: New file.
* emacs/guix.el: New file.

Move operating system helpers from (guix build …) to (gnu build …).

* guix/build/activation.scm, guix/build/install.scm,
  guix/build/linux-initrd.scm, guix/build/vm.scm: Move to...
* gnu/build: ... here.
* Makefile.am (MODULES): Remove the above guix/build/ files.
* gnu-system.am (GNU_SYSTEM_MODULES): Add the above gnu/build/ files
  here.
* gnu/services/base.scm, gnu/services/dmd.scm, gnu/system.scm,
  gnu/system/linux-initrd.scm, gnu/system/vm.scm,
  guix/scripts/system.scm: Adjust to the new module names.