Merge branch 'master' into staging

build-system: Add 'font-build-system'.

* Makefile.am (MODULES): Add 'guix/build-system/font.scm' and
  'guix/build/font-build-system.scm'.
* guix/build-system/font.scm: New file.
* guix/build/font-build-system.scm: New file.
* doc/guix.texi (Build Systems): Add 'font-build-system'.

Merge branch 'master' into staging

Merge branch 'version-0.13.0'

Merge branch 'master' into staging

maint: The 'release' target builds a VM image.

* gnu/system/examples/vm-image.tmpl: New file.
* Makefile.am (GUIXSD_VM_SYSTEMS, GUIXSD_VM_IMAGE_BASE,
GUIXSD_VM_IMAGE_SIZE): New variables.
(release): Add logic to build a VM image.
(EXAMPLES): Add 'gnu/system/examples/vm-image.tmpl'.
* doc/guix.texi (Running GuixSD in a VM, Installing GuixSD in a VM): Mention the
pre-built VM image.

build: Compile stackage only if 'guile-json' is available.

Fixes <http://bugs.gnu.org/26860>.
This is a followup to commit 3089b5d3f5a31b191b68ce3aa9255b646940b642.

* Makefile.am (MODULES): Move "guix/scripts/import/stackage.scm" within
'if HAVE_GUILE_JSON'.

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

maint: Add 'update-NEWS' target.

* build-aux/update-NEWS.scm: New file.
* Makefile.am (EXTRA_DIST): Add it.
(GUIX_MAINTENANCE_DIRECTORY): New variable.
(update-NEWS): New target.
(.PHONY): Add it.

maint: The 'release' target builds a VM image.

* gnu/system/examples/vm-image.tmpl: New file.
* Makefile.am (GUIXSD_VM_SYSTEMS, GUIXSD_VM_IMAGE_BASE,
GUIXSD_VM_IMAGE_SIZE): New variables.
(release): Add logic to build a VM image.
(EXAMPLES): Add 'gnu/system/examples/vm-image.tmpl'.
* doc/guix.texi (Running GuixSD in a VM, Installing GuixSD in a VM): Mention the
pre-built VM image.

build: Compile stackage only if 'guile-json' is available.

Fixes <http://bugs.gnu.org/26860>.
This is a followup to commit 3089b5d3f5a31b191b68ce3aa9255b646940b642.

* Makefile.am (MODULES): Move "guix/scripts/import/stackage.scm" within
'if HAVE_GUILE_JSON'.

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

maint: 'release' now depends on 'dist', not 'distcheck'.

* Makefile.am (release): Depend on 'dist' instead of 'distcheck'.

maint: Really build GuixSD for different systems.

* Makefile.am (release): Add missing --system flag to 'guix system
disk-image'.  Reported by Leo Famulari.

Merge branch 'master' into staging

build: 'assert-no-store-file-names' depends on ChangeLog.

This fixes a bug whereby "make distcheck -j4" might invoke
'assert-no-store-file-names' when the temporary $(distdir)/cl-t
exists (and contains store file names), before $(distdir)/ChangeLog has
been created.

* Makefile.am (assert-no-store-file-names): Depend on $(distdir)/ChangeLog.
(dist-hook): Depend on $(distdir)/ChangeLog instead of 'gen-ChangeLog'.
(gen-ChangeLog): Add $(distdir)/ChangeLog left of the colon.

guix: Add java-utils.

* guix/build/java-utils.scm: New file.
* guix/build-system/ant.scm: Use it.
* Makefile.am (MODULES): Add it.

Co-authored-by: Ricardo Wurmus <rekado@elephly.net>

maint: Tweak the 'release' target.

* Makefile.am (SUPPORTED_SYSTEMS, GUIXSD_SUPPORTED_SYSTEMS): Use "?="
instead of "=".
(release): Do "git checkout ." in po/ early on.  Abort upon uncommitted
changes.  Print a message at the end.

maint: Add 'release' target.

Suggested by Jan Nieuwenhuizen.

* Makefile.am (releasedir, PACKAGE_FULL_TARNAME, SOURCE_TARBALLS)
(SUPPORTED_SYSTEMS, BINARY_TARBALLS, GUIXSD_SUPPORTED_SYSTEMS)
(GUIXSD_IMAGE_BASE, GUIXSD_INSTALLATION_IMAGE_SIZE): New variables.
(release): New target.
(.PHONY): Add it.

maint: Add bayfront.guixsd.org signing key.

* bayfront.guixsd.org.pub: New file.
* Makefile.am (dist_pkgdata_DATA): Add it.

maint: "distcheck" inherits the test root directory.

* Makefile.am (AM_DISTCHECK_CONFIGURE_FLAGS): Add 'ac_cv_guix_test_root'.

build: Use 'guix pack -K' for the 'guix-binary*.tar.xz' targets.

* Makefile.am (guix-binary.%.tar.xz): Add -K flag for 'guix pack'.