guix build: Add '--no-build-hook'.

* guix/scripts/build.scm (%default-options): Add 'build-hook?' pair.
  (show-help, %options): Add --no-build-hook.
  (guix-build): Pass the 'build-hook?' value to 'set-build-options'.
* doc/guix.texi (Invoking guix build): Document '--no-build-hook'.

guix package: Gracefully deal with EPIPE on stdout for --list-*.

* guix/scripts/package.scm (leave-on-EPIPE): New macro.
  (guix-package): Use it for 'list-installed', 'list-available', and
  '--list-generations'.
* tests/guix-package.sh: Add test.

gnu: lsh: Fix the absolute file name of 'sexp-conv'.

* gnu/packages/lsh.scm (lsh): Rename 'fix-test-suite' phase to
  'pre-configure'.  Set PATH_SEXP_CONV in environ.h.in.

gnu: nettle: Set the RUNPATH on 'sexp-conv' and other programs.

* gnu/packages/nettle.scm (nettle): Rename 'inputs' to 'native-inputs'.
  Add 'arguments' field.

gnu: lsh: Distinguish between native inputs and target inputs.

* gnu/packages/lsh.scm (lsh): Move M4, Guile, gperf, and psmisc to
  'native-inputs'.  Use GUILE-2.0 instead of GUILE-FINAL.

doc: Update 'ROADMAP'.

* ROADMAP: Add link to the updated road map, and the a note on release
  history.

Thank Niels.

gnu: pulseaudio: Add patch for 'volume-test'; re-enable tests.

* gnu/packages/patches/pulseaudio-volume-test.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.
* gnu/packages/pulseaudio.scm (pulseaudio): Use it.  Remove
  #:tests? #t.

gnu: games: Add new package gnubg

* gnu/packages/games.scm (gnubg): New variable

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

gnu: libgcrypt: Add "debug" output.

* gnu/packages/gnupg.scm (libgcrypt): Add 'outputs' field.

archive: Add '--authorize'.

* guix/scripts/archive.scm (authorize-key): New procedure.
  (guix-archive): Call it when OPTS contains 'authorize-key'.
* tests/guix-archive.sh: Add test with invalid public key.
* guix/pki.scm: Export '%acl-file'.
* doc/guix.texi (Invoking guix archive): Make it clear that '--import'
  works only with authorized keys.  Document '--authorize'.

archive: Add '--generate-key'.

* guix/pk-crypto.scm (error-source, error-string): New procedures.
* guix/pki.scm (%private-key-file): New variable.
* guix/scripts/archive.scm (show-help): Document '--generate-key'.
  (%options): Add "generate-key".
  (generate-key-pair): New procedure.
  (guix-archive): Call 'generate-key' when OPTS contains a
  'generate-key' pair.
* doc/guix.texi (Setting Up the Daemon): Suggest generating a key pair.
  (Invoking guix archive): Document '--generate-key'.

pk-crypto: Fix 'canonical-sexp->sexp' for atoms.

* guix/pk-crypto.scm (canonical-sexp->sexp): Add hack to extract an
  atom's buffer.
* tests/pk-crypto.scm ("sexp->canonical-sexp->sexp"): Add sample.

pk-crypto: Work around Libgcrypt bug <https://bugs.g10code.com/gnupg/issue1594>.

* guix/pk-crypto.scm (canonical-sexp-fold): Call 'nth-data' before
  'nth' to work around <https://bugs.g10code.com/gnupg/issue1594>.
* tests/pk-crypto.scm ("https://bugs.g10code.com/gnupg/issue1594"): New
  test.

authenticate: Consistently use 'leave' for fatal error reporting.

* guix/scripts/authenticate.scm (guix-authenticate): Replace all uses of
  'format' + 'exit' with 'leave'.

Thank Kete.

gnu: mesa: Move out of xorg.scm and into gl.scm

* gnu/packages/xorg.scm (mesa): Move to...
* gnu/packages/gl.scm (mesa): ... here.  New variable.
* gnu/packages/gnome.scm, gnu/packages/gnuzilla.scm,
  gnu/packages/qemu.scm, gnu/packages/qt.scm: Adjust accordingly.

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

doc: Invoke 'useradd' with '--system'.

Reported by Kete <kete@ninthfloor.org>.
Fixes <http://bugs.gnu.org/16289>.

* doc/guix.texi (Setting Up the Daemon): Add '--system' to the 'useradd'
  command line.  Suggested by Kete <kete@ninthfloor.org>.

gnu: automake: Upgrade to 1.14.1.

* gnu/packages/autotools.scm (automake): Upgrade to 1.14.1.

gnu: gdbm: Upgrade to 1.11.

* gnu/packages/gdbm.scm (gdbm): Upgrade to 1.11.