* guix/scripts/gc.scm (show-help, %options): Add '--list-roots'.
(guix-gc)[list-roots]: New procedure.
Handle '--list-roots'.
* tests/guix-gc.sh: Test it.
* doc/guix.texi (Invoking guix gc): Document it.

* guix/store/roots.scm, tests/store-roots.scm: New files.
* Makefile.am (STORE_MODULES): Add guix/store/roots.scm.
(SCM_TESTS): Add tests/store-roots.scm.

Reported by pkill9.

* guix/scripts/pull.scm (show-help): Remove duplicate '--dry-run'
description.

* guix/ui.scm (highlight-argument): New macro.
(%highlight-argument): New procedure.
(define-diagnostic): Use 'highlight-argument'.

* guix/ui.scm (%info-colors): Remove CYAN.
(%hint-colors): New variable.
(display-hint): Adjust so that the "hint:" prefix is colorized.

* gnu/packages/mail.scm (public-inbox): New variable.

* gnu/packages/web.scm (perl-plack-middleware-deflater): New variable.

* gnu/packages/search.scm (perl-search-xapian): New variable.

* gnu/packages/networking.scm (perl-danga-socket): New variable.

* gnu/packages/perl.scm (perl-sys-syscall): New variable.

* gnu/packages/perl.scm (perl-filesys-notify-simple): New variable.

* gnu/packages/perl.scm (perl-devel-leak): New variable.

* gnu/packages/mail.scm (perl-email-address-xs): New variable.

* guix/ui.scm (define-diagnostic): Add 'colors' parameter and pass it to
'print-diagnostic-prefix'.
(warning, info, report-error): Add extra argument.
(%warning-colors, %info-colors, %error-colors): New variables.
(print-diagnostic-prefix): Add #:colors parameter and honor it.

* guix/ui.scm (define-diagnostic): Add optional 'location' parameter.
Pass it to 'print-diagnostic-prefix'.
(print-diagnostic-prefix): Add optional 'location' parameter and honor
it.
(report-load-error): Use 'report-error' and 'warning' instead
of (format (current-error-port) …).

* guix/ui.scm (define-diagnostic): Emit call to 'print-diagnostic-prefix'.
(print-diagnostic-prefix): New procedure.

* guix/ui.scm (define-diagnostic): Expect PREFIX to be enclosed in
'G_'.   Emit call to 'gettext' on PREFIX.
(warning, info, report-error): Wrap prefix in 'G_'.

Until now, we'd pass 'gettext' the "augmented" format string, which
'gettext' would not find in message catalogs.  Now we pass it FMT as is,
which is what catalogs contain.

* guix/ui.scm (define-diagnostic)[augmented-format-string]: Remove.
Emit one 'format' call to print the prefix, and a second one to print
the actual message.

* guix/colors.scm: New file.
* Makefile.am (MODULES): Add it.
* guix/ui.scm (color-table, color, colorize-string): Remove.
* guix/status.scm (isatty?*, color-output? color-rules): Remove.

* guix/store.scm (call-with-store): New procedure.
(with-store): Write in terms of 'call-with-store'.

* gnu/system/examples/desktop.tmpl: Adjust comment that referred to SLiM.

Suggested by Chris Marusich.

* guix/scripts/package.scm (absolutize): New procedure.
(display-search-paths): Use it.

* gnu/packages/web.scm (nginx): Update to 1.15.11.

* gnu/packages/upnp.scm (miniupnpc): Update to 2.1.20190408.

This release fixes CVE-2019-3870 and CVE-2019-3880.

* gnu/packages/samba.scm (samba): Update to 4.10.2.

* gnu/packages/gnome.scm (libsoup): Update to 2.66.1.

* gnu/packages/webkit.scm (webkitgtk-2.24): Update to 2.24.1.

* guix/build-system/cargo.scm (%cargo-build-system-modules):
Add (json parser).
(cargo-build):
[vendor-dir]: Define flag and pass it to builder code.
[cargo-test-flags]: Likewise.
[skip-build?]: Likewise.
* guix/build/cargo-build/system.scm (#:use-module): use (json parser).
(package-name->crate-name): Delete it.
(manifest-targets): Add it.
(has-executable-target?): Add it.
(configure): Add #:vendor-dir name and use it.
Don't touch Cargo.toml.
Don't symlink to duplicate inputs.
Remove useless registry line from cargo config.
Define RUSTFLAGS to lift lint restrictions.
(build): Add #:skip-build? flag and use it.
(check): Likewise.
Add #:cargo-test-flags and pass it to cargo.
(install): Factor source logic to install-source.
Define #:skip-build? flag and use it.
Only install if executable targets are present.
(install-source): Copy entire crate directory not just src.
[generate-checksums] pass dummy file for unused second argument.
(%standard-phases): Add install-source phase.

Signed-off-by: Chris Marusich <cmmarusich@gmail.com>

* gnu/packages/freedesktop.scm (weston): Update to 6.0.0.
[build-system]: Build with meson-build-system.
[inputs]: Add colord, lcms, libevdev, libjpeg, libva, libwebp, libxml2 and
pango.
[arguments]: Adjust to Meson.

* gnu/packages/finance (electron-cash): Update to 4.0.1.

Signed-off-by: Danny Milosavljevic <dannym@scratchpost.org>

* gnu/packages/finance (python-trezor-agent): Update to 0.13.1.

Signed-off-by: Danny Milosavljevic <dannym@scratchpost.org>

* gnu/packages/finance (python-keepkey): Update to 6.0.3.

Signed-off-by: Danny Milosavljevic <dannym@scratchpost.org>

* gnu/packages/finance (python-trezor): Update to 0.11.2.

Signed-off-by: Danny Milosavljevic <dannym@scratchpost.org>

* gnu/packages/guile-xyz.scm (guile-email): Update to 0.1.0.

* gnu/packages/engineering.scm (gnucap): New variable.

* gnu/packages/gimp.scm (gimp): Update to 2.10.10.

* gnu/packages/video.scm (openshot)[source]: Add snippet to remove
bundled font.
[inputs]: Add font-ubuntu.
[arguments]: Add custom 'patch-font-location to patch the search path
for the unbundled font.

* gnu/packages/video.scm (openshot)[arguments]: Add more modules.
Adjust custom 'wrap-program phase to use wrap-qt-program.

* gnu/packages/video.scm (openshot): Update to 2.4.4.

* gnu/packages/video.scm (libopenshot): Update to 0.2.3.