* gnu/packages/algebra.scm (pari-gp): Upgrade to 2.7.1.

* gnu/system/file-systems.scm (%pseudo-terminal-file-system)
  (%shared-memory-file-system): Add to export list.

* gnu/system/file-systems.scm (%shared-memory-file-system): New
  variable.
  (%base-file-systems): Add it.
* doc/guix.texi (File Systems): Document it.

* guix/build/linux-initrd.scm (MS_NOSUID, MS_NODEV, MS_NOEXEC): New
  variables.
  (mount-flags->bit-mask): New procedure.
  (mount-file-system)[flags->bit-mask]: Remove.
  Use 'mount-flags->bit-mask' instead.
  In /etc/mtab, use the empty string when OPTIONS is false.
* gnu/services/base.scm (file-system-service): Add #:flags parameter and
  honor it.
* gnu/system.scm (other-file-system-services): Pass FLAGS to
  'file-system-service'.

* doc/guix.texi (Function Index): Rename to...
  (Programming Index): ... this.  Merge the type, variable, and function
  indices.

Fixes <http://bugs.gnu.org/18081>.

* gnu/system/file-systems.scm (%devtmpfs-file-system): Add
  'needed-for-boot?' field.
  (%tty-gid, %pseudo-terminal-file-system): New variables.
  (%base-file-systems): Add %PSEUDO-TERMINAL-FILE-SYSTEM.
* gnu/services/base.scm (udev-service): Remove dependency on
  'file-system-/dev'.
* gnu/system/shadow.scm (%base-groups): Add 'id' field for group 'tty'.
* guix/build/linux-initrd.scm (boot-system): Remove 'mount' call for
  /dev/pts.
* doc/guix.texi (File Systems): Add %pseudo-terminal-file-system.

* gnu/system/file-systems.scm (<file-system>)[create-mount-point?]: New
  field.
* gnu/services/base.scm (file-system-service): Add #:create-mount-point?
  parameter and honor it.
* gnu/system.scm (other-file-system-services): Update
  'file-system-service' call accordingly.
* doc/guix.texi (File Systems): Document it.

* configure.ac: Change back to requiring gettext at least 0.18.1, partially
    reverting commit ee764179.

Suggested by Adam Pribyl <pribyl@lowlevel.cz>.

* gnu/services/base.scm (udev-service)[requirement]: Add
  'file-system-/dev'.
* gnu/system/file-systems.scm (%devtmpfs-file-system,
  %base-file-systems): New variables.
* gnu/system/install.scm (installation-services)[file-systems]: Use
  %base-file-systems.
* build-aux/hydra/demo-os.scm (file-systems): Likewise.
* doc/guix.texi (System Installation): Show %BASE-FILE-SYSTEMS in the
  example.
  (Using the Configuration System): Likewise.
  (File Systems): Document %base-file-systems, %devtmpfs-file-system,
  %binary-format-file-system, and %fuse-control-file-system.

* doc/guix.texi (System Installation): s/are/is/.

* guix/build-system/gnu.scm (standard-inputs): Add comment about
  misplaced memoization.
* guix/packages.scm (cache): Likewise.

* gnu/services/base.scm (file-system-service)[start]: Set $PATH so that
  fsck.* can be found.  Reported by "DusXMT".

* doc/guix.texi: Update the documentation.
* guix/scripts/package.scm: Add a "show" option.
* tests/guix-package.sh: Add a test for the "show" option.

* guix/ui.scm (package->recutils): Print the dependencies of the package.

* tests/guix-register.sh: Remove redundant $new_store in $NIX_STATE_DIR,
  introduced in 689142cd ("guix-register: Add '--state-directory'
  parameter.")  Reported by Eric Bavier <ericbavier@gmail.com> and
  Alen Skondro <askondro@gmail.com>.

* doc/guix.texi (Invoking guix refresh): Show example output of the
  command.

* guix/scripts/refresh.scm: Use (ice-9 format).

* guix/scripts/system.scm (copy-closure): Rename to...
  (copy-item): ... this.
  (copy-closure): New procedure.
  (install): Use it, and remove redundant code.

* gnu/packages/video.scm (ffmpeg): Remove --disable-vis.

* gnu/packages/admin.scm (wpa-supplicant): Update to version 2.2.

* gnu/packages/admin.scm (sudo): Update to version 1.8.10p3.

* guix/packages.scm (package-direct-inputs): New procedure.
* gnu/packages.scm (vhash-refq, package-direct-dependents)
  (package-transitive-dependents, package-covering-dependents): New procedures.
* guix/scripts/refresh.scm (%options, show-help, guix-refresh): Add
  --list-dependent option.
* doc/guix.texi (Invoking guix refresh): Document '--list-dependent' option.

* guix/utils.scm (fold-tree, fold-tree-leaves): New functions.
* tests/utils.scm: Add tests for them.

* gnu/packages/admin.scm (htop): Update to version 1.0.3.

* gnu/packages/admin.scm (dfc): Update to version 3.0.4.

* gnu/packages/swig.scm (swig): Add boost as input and enable tests.

* gnu/packages/linux.scm (linux-libre): Update to version 3.15.6.

* gnu/system/install.scm (installation-os): Add wireless-tools to packages.

* gnu/system/linux-initrd (linux-modules): Add them.

* gnu/packages/linux.scm (wireless-tools): New variable.

Fixes <http://bugs.gnu.org/18053>.
Reported by Mark H Weaver <mhw@netris.org>.

* guix/build/install.scm (directives): Add mode #o1775 for STORE.

* gnu/packages/datamash.scm: New file.
* gnu-system.am (GNU_SYSTEM_MODULES): Add it.

Fixes <http://bugs.gnu.org/18049>.
Reported by Marek Benc <merkur32@gmail.com>.

* guix/scripts/system.scm (copy-closure): Pass #:state-directory to
  'register-path'.

* nix/guix-register/guix-register.cc (GUIX_OPT_STATE_DIRECTORY): New
  macro.
  (parse_opt): Honor it.
* tests/guix-register.sh: Add test with '--state-directory'.
* guix/store.scm (register-path): Add #:state-directory parameter.

* doc/guix.texi (Using the Configuration System): 'gid' -> 'group'
  in user-account example.
  (Initial RAM Disk): 'base-init' -> 'base-initrd'.

* gnu/packages/version-control.scm (aegis): New variable.
* gnu/packages/patches/aegis-constness-error.patch: New file.
* gnu/packages/patches/aegis-perl-tempdir1.patch: New file.
* gnu/packages/patches/aegis-perl-tempdir2.patch: New file.
* gnu/packages/patches/aegis-test-fixup-1.patch: New file.
* gnu/packages/patches/aegis-test-fixup-2.patch: New file.