GNU bug report logs - #34240
[PATCH 0/5] Gnome printing improvements

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Christopher Baines <mail <at> cbaines.net>
To: guix-patches <at> gnu.org
Subject: [PATCH 0/5] Gnome printing improvements
Date: Tue, 29 Jan 2019 11:37:24 +0000

[Message part 1 (text/plain, inline)]

These patches work towards allowing easy configuration of printers
within Gnome (and probably other desktop environments).

Previously, the gnome-control-center printer configuration would simply
not work, as I believe it depends on cups-pk-helper and
system-config-printer. With these two things present, it works better,
but I encounter authentication issues.


Christopher Baines (5):
  gnu: Add cups-pk-helper.
  services: Add cups-pk-helper.
  gnu: Add python-pycups.
  gnu: Add system-config-printer.
  gnu: gnome: Include system-config-printer.

 gnu/packages/cups.scm    | 52 ++++++++++++++++++++++++
 gnu/packages/gnome.scm   | 88 ++++++++++++++++++++++++++++++++++++++++
 gnu/services/desktop.scm | 17 ++++++++
 3 files changed, 157 insertions(+)

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Message #8 received at 34240 <at> debbugs.gnu.org (full text, mbox):

From: Christopher Baines <mail <at> cbaines.net>
To: 34240 <at> debbugs.gnu.org
Subject: [PATCH 1/5] gnu: Add cups-pk-helper.
Date: Tue, 29 Jan 2019 11:42:38 +0000

* gnu/packages/cups.scm (cups-pk-helper): New variable.
---
 gnu/packages/cups.scm | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/gnu/packages/cups.scm b/gnu/packages/cups.scm
index 40ffc0df80..138a1fc3ed 100644
--- a/gnu/packages/cups.scm
+++ b/gnu/packages/cups.scm
@@ -38,6 +38,7 @@
   #:use-module (gnu packages pdf)
   #:use-module (gnu packages perl)
   #:use-module (gnu packages pkg-config)
+  #:use-module (gnu packages polkit)
   #:use-module (gnu packages pretty-print)
   #:use-module (gnu packages python)
   #:use-module (gnu packages python-xyz)
@@ -380,6 +381,32 @@ device-specific programs to convert and print many types of files.")
        ("cups-filters" ,cups-filters)
        ("zlib"  ,zlib)))))
 
+(define-public cups-pk-helper
+  (package
+    (name "cups-pk-helper")
+    (version "0.2.6")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "https://freedesktop.org/software/"
+                                  name "/releases/" name "-" version ".tar.xz"))
+              (sha256
+               (base32
+                "0a52jw6rm7lr5nbyksiia0rn7sasyb5cjqcb95z1wxm2yprgi6lm"))))
+    (build-system gnu-build-system)
+    (native-inputs
+     `(("intltool" ,intltool)
+       ("pkg-config" ,pkg-config)
+       ("glib" ,glib)
+       ("polkit" ,polkit)
+       ("cups" ,cups)))
+    (home-page "https://www.freedesktop.org/wiki/Software/cups-pk-helper/")
+    (synopsis "PolicyKit helper to configure cups with fine-grained privileges")
+    (description
+     "This package provides the org.opensuse.CupsPkHelper.Mechanism DBus
+system service which uses @file{cups-pk-helper-mechanism}.  This package
+should only be used as part of the Guix cups-pk-helper service.")
+    (license license:gpl2+)))
+
 (define-public hplip
   (package
     (name "hplip")
-- 
2.20.1

Message #11 received at 34240 <at> debbugs.gnu.org (full text, mbox):

From: Christopher Baines <mail <at> cbaines.net>
To: 34240 <at> debbugs.gnu.org
Subject: [PATCH 3/5] gnu: Add python-pycups.
Date: Tue, 29 Jan 2019 11:42:40 +0000

* gnu/packages/cups.scm (python-pycups): New variable.
---
 gnu/packages/cups.scm | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/gnu/packages/cups.scm b/gnu/packages/cups.scm
index 138a1fc3ed..3b42f9e27e 100644
--- a/gnu/packages/cups.scm
+++ b/gnu/packages/cups.scm
@@ -46,6 +46,7 @@
   #:use-module (gnu packages scanner)
   #:use-module (gnu packages tls)
   #:use-module (guix build-system gnu)
+  #:use-module (guix build-system python)
   #:use-module (guix download)
   #:use-module ((guix licenses) #:prefix license:)
   #:use-module (guix packages)
@@ -708,3 +709,27 @@ printers.  It can only be used with printers that support the Epson ESC/P-R
 language.")
     (home-page "http://download.ebz.epson.net/dsc/search/01/search")
     (license license:gpl2+)))
+
+(define-public python-pycups
+  (package
+    (name "python-pycups")
+    (version "1.9.74")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "pycups" version ".tar.bz2"))
+       (sha256
+        (base32
+         "1ffp7sswhdsfpy88zg0cc8kl04wygkjs01rlm9f0spbwk8jhy2c6"))))
+    (build-system python-build-system)
+    (arguments
+     '(;; Tests require CUPS to be running
+       #:tests? #f))
+    (inputs
+     `(("cups" ,cups)))
+    (home-page "https://github.com/zdohnal/pycups")
+    (synopsis "Python bindings for libcups")
+    (description
+     "This package provides Python bindings for libcups, wrapping the CUPS
+API.")
+    (license license:gpl2+)))
-- 
2.20.1

Message #14 received at 34240 <at> debbugs.gnu.org (full text, mbox):

From: Christopher Baines <mail <at> cbaines.net>
To: 34240 <at> debbugs.gnu.org
Subject: [PATCH 5/5] gnu: gnome: Include system-config-printer.
Date: Tue, 29 Jan 2019 11:42:42 +0000

This package enables some functionality for printers within the
gnome-control-center as well as providing a standalone configuration tool.

At the moment, due to the lack of PackageKit support within Guix, the
gnome-control-center can't help users through the process of installing this,
so make it a default package.

* gnu/packages/gnome.scm (gnome)[propagated-inputs]: Add system-config-printer.
---
 gnu/packages/gnome.scm | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gnu/packages/gnome.scm b/gnu/packages/gnome.scm
index 0982409eeb..3a3e98a8fe 100644
--- a/gnu/packages/gnome.scm
+++ b/gnu/packages/gnome.scm
@@ -6155,6 +6155,7 @@ associations for GNOME.")
        ("pinentry-gnome3"           ,pinentry-gnome3)
        ("pulseaudio"                ,pulseaudio)
        ("shared-mime-info"          ,shared-mime-info)
+       ("system-config-printer"     ,system-config-printer)
        ("totem"                     ,totem)
        ("xdg-user-dirs"             ,xdg-user-dirs)
        ("yelp"                      ,yelp)
-- 
2.20.1

Message #17 received at 34240 <at> debbugs.gnu.org (full text, mbox):

From: Christopher Baines <mail <at> cbaines.net>
To: 34240 <at> debbugs.gnu.org
Subject: [PATCH 2/5] services: Add cups-pk-helper.
Date: Tue, 29 Jan 2019 11:42:39 +0000

This service integrates cups and PolicyKit. The gnome-control-center printing
section uses this functionality.

* gnu/sevices/desktop.scm (cups-pk-helper-service-type): New variable.
(%desktop-services): Add the cups-pk-helper service.
---
 gnu/services/desktop.scm | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/gnu/services/desktop.scm b/gnu/services/desktop.scm
index fbeabf1162..a93fa3c356 100644
--- a/gnu/services/desktop.scm
+++ b/gnu/services/desktop.scm
@@ -39,6 +39,7 @@
   #:use-module (gnu system pam)
   #:use-module (gnu packages glib)
   #:use-module (gnu packages admin)
+  #:use-module (gnu packages cups)
   #:use-module (gnu packages freedesktop)
   #:use-module (gnu packages gnome)
   #:use-module (gnu packages xfce)
@@ -801,6 +802,21 @@ accountsservice web site} for more information."
   (service accountsservice-service-type accountsservice))
 
 
+;;;
+;;; cups-pk-helper service.
+;;;
+
+(define cups-pk-helper-service-type
+  (service-type
+   (name 'cups-pk-helper)
+   (description
+    "PolicyKit helper to configure CUPS with fine-grained privileges.")
+   (extensions
+    (list (service-extension dbus-root-service-type list)
+          (service-extension polkit-service-type list)))
+   (default-value cups-pk-helper)))
+
+
 ;;;
 ;;; GNOME desktop service.
 ;;;
@@ -990,6 +1006,7 @@ as expected.")))
          (udisks-service)
          (upower-service)
          (accountsservice-service)
+         (service cups-pk-helper-service-type)
          (colord-service)
          (geoclue-service)
          (service polkit-service-type)
-- 
2.20.1

Message #20 received at 34240 <at> debbugs.gnu.org (full text, mbox):

From: Christopher Baines <mail <at> cbaines.net>
To: 34240 <at> debbugs.gnu.org
Subject: [PATCH 4/5] gnu: Add system-config-printer.
Date: Tue, 29 Jan 2019 11:42:41 +0000

* gnu/packages/gnome.scm (system-config-printer): New variable.
---
 gnu/packages/gnome.scm | 87 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 87 insertions(+)

diff --git a/gnu/packages/gnome.scm b/gnu/packages/gnome.scm
index bf9109f680..0982409eeb 100644
--- a/gnu/packages/gnome.scm
+++ b/gnu/packages/gnome.scm
@@ -978,6 +978,93 @@ for translations, though this is only a dependency for the maintainers.  This
 database is translated at Transifex.")
     (license license:gpl2+)))
 
+(define-public system-config-printer
+  (package
+    (name "system-config-printer")
+    (version "1.5.11")
+    (source (origin
+             (method url-fetch)
+             (uri (string-append
+                   "https://github.com/zdohnal/system-config-printer/releases/"
+                   "download/" version
+                   "/system-config-printer-" version ".tar.xz"))
+             (sha256
+              (base32
+               "1lq0q51bhanirpjjvvh4xiafi8hgpk8r32h0dj6dn3f32z8pib9q"))))
+    (build-system glib-or-gtk-build-system)
+    (arguments
+     `(#:imported-modules ((guix build python-build-system)
+                           ,@%glib-or-gtk-build-system-modules)
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'patch-Makefile.am
+           (lambda _
+             ;; The Makefile generates some scripts, so set a valid shebang
+             (substitute* "Makefile.am"
+               (("/bin/bash") (which "bash")))
+             #t))
+         (add-after 'unpack 'patch-docbook-xml
+           (lambda* (#:key inputs #:allow-other-keys)
+             ;; Modify the man XML otherwise xmlto tries to access the network
+             (substitute* "man/system-config-printer.xml"
+               (("http://www.oasis-open.org/docbook/xml/4.1.2/")
+                (string-append (assoc-ref inputs "docbook-xml")
+                               "/xml/dtd/docbook/")))
+             #t))
+         (add-before 'configure 'bootstrap
+           (lambda _
+             ;; Run ./bootstrap as otherwise the build fails with
+             ;; automake-1.15: command not found
+             (invoke "./bootstrap")
+             #t))
+         (add-after 'install 'wrap-for-python
+           (@@ (guix build python-build-system) wrap))
+         (add-after 'install 'wrap
+           (lambda* (#:key outputs #:allow-other-keys)
+             (let ((out               (assoc-ref outputs "out"))
+                   (gi-typelib-path   (getenv "GI_TYPELIB_PATH")))
+               (for-each
+                (lambda (program)
+                  (wrap-program program
+                    `("GI_TYPELIB_PATH" ":" prefix (,gi-typelib-path))))
+                (map (lambda (name)
+                       (string-append out "/bin/" name))
+                     '("system-config-printer"
+                       "system-config-printer-applet"
+                       "install-printerdriver"
+                       "scp-dbus-service"))))
+             #t)))))
+    (inputs
+     `(("gsettings-desktop-schemas" ,gsettings-desktop-schemas)
+       ("gobject-introspection" ,gobject-introspection)
+       ("python" ,python)
+       ("cups" ,cups)
+       ("python-dbus" ,python-dbus)
+       ("python-pygobject" ,python-pygobject)
+       ("python-pycups" ,python-pycups)
+       ("python-requests" ,python-requests)
+       ("python-pycairo" ,python-pycairo)
+       ("libnotify" ,libnotify)
+       ("packagekit" ,packagekit)))
+    (native-inputs
+     `(("pkg-config" ,pkg-config)
+       ("desktop-file-utils" ,desktop-file-utils)
+       ("glib" ,glib)
+       ("autoconf" ,autoconf)
+       ("automake" ,automake)
+       ("intltool" ,intltool)
+       ("xmlto" ,xmlto)
+       ("docbook-xml" ,docbook-xml-4.1.2)
+       ("docbook-xsl" ,docbook-xsl)
+       ("libxml2" ,libxml2)))
+    (home-page "https://github.com/zdohnal/system-config-printer")
+    (synopsis "CUPS administration tool")
+    (description
+     "system-config-printer is a CUPS administration tool.  It's written in
+Python using GTK+, and uses the @acronym{IPP, Internet Printing Protocol} when
+configuring CUPS.")
+    (license license:gpl2+)))
+
 (define-public hicolor-icon-theme
   (package
     (name "hicolor-icon-theme")
-- 
2.20.1

Message #23 received at 34240 <at> debbugs.gnu.org (full text, mbox):

From: Ricardo Wurmus <rekado <at> elephly.net>
To: Christopher Baines <mail <at> cbaines.net>
Cc: 34240 <at> debbugs.gnu.org
Subject: Re: [bug#34240] [PATCH 1/5] gnu: Add cups-pk-helper.
Date: Tue, 29 Jan 2019 17:42:46 +0100

Christopher Baines <mail <at> cbaines.net> writes:

> * gnu/packages/cups.scm (cups-pk-helper): New variable.
[…]
> +    (synopsis "PolicyKit helper to configure cups with fine-grained
> privileges")

Should be “CUPS” instead of “cups”.

> +    (description
> +     "This package provides the org.opensuse.CupsPkHelper.Mechanism DBus
> +system service which uses @file{cups-pk-helper-mechanism}.  This package
> +should only be used as part of the Guix cups-pk-helper service.")

I’d wrap the service names in @code{…}.

Why can it not be used without the cups-pk-helper service?  Is it not
enough to install the package in a location that gets searched by DBus?

--
Ricardo

Message #26 received at 34240 <at> debbugs.gnu.org (full text, mbox):

From: Ricardo Wurmus <rekado <at> elephly.net>
To: Christopher Baines <mail <at> cbaines.net>
Cc: 34240 <at> debbugs.gnu.org
Subject: Re: [bug#34240] [PATCH 3/5] gnu: Add python-pycups.
Date: Tue, 29 Jan 2019 17:44:40 +0100

Christopher Baines <mail <at> cbaines.net> writes:

> * gnu/packages/cups.scm (python-pycups): New variable.

LGTM!

-- 
Ricardo

Message #29 received at 34240 <at> debbugs.gnu.org (full text, mbox):

From: Christopher Baines <mail <at> cbaines.net>
To: Ricardo Wurmus <rekado <at> elephly.net>
Cc: 34240 <at> debbugs.gnu.org
Subject: Re: [bug#34240] [PATCH 2/5] services: Add cups-pk-helper.
Date: Tue, 29 Jan 2019 16:56:26 +0000

[Message part 1 (text/plain, inline)]

Ricardo Wurmus <rekado <at> elephly.net> writes:

> Christopher Baines <mail <at> cbaines.net> writes:
>
>> This service integrates cups and PolicyKit. The gnome-control-center printing
>> section uses this functionality.
>>
>> * gnu/sevices/desktop.scm (cups-pk-helper-service-type): New variable.
>> (%desktop-services): Add the cups-pk-helper service.
>
> I wonder if this service is really needed or if it would be enough to
> install the package into the system profile, for example.
>
> (It looks fine to me, but I’m still curious.)

Thanks for taking a look Ricardo. I'm unsure, this DBus/Polkit stuff is
still a bit of a mystery to me. These files are put in place by the
service [1], and I think that's what makes it do stuff...

1:
/etc/dbus-1/system-services/org.opensuse.CupsPkHelper.Mechanism.service
/etc/polkit-1/actions/org.opensuse.cupspkhelper.mechanism.policy

I guess it entirely depends on the configuration for DBus and Polkit in
Guix, but I can't see similar things in /run/current-system/profile/etc/
so I'm guessing it's not currently possible to make this work through
the system profile.

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Message #32 received at 34240 <at> debbugs.gnu.org (full text, mbox):

From: Christopher Baines <mail <at> cbaines.net>
To: Ricardo Wurmus <rekado <at> elephly.net>
Cc: 34240 <at> debbugs.gnu.org
Subject: Re: [bug#34240] [PATCH 1/5] gnu: Add cups-pk-helper.
Date: Tue, 29 Jan 2019 17:03:07 +0000

[Message part 1 (text/plain, inline)]

Ricardo Wurmus <rekado <at> elephly.net> writes:

> Christopher Baines <mail <at> cbaines.net> writes:
>
>> * gnu/packages/cups.scm (cups-pk-helper): New variable.
> […]
>> +    (synopsis "PolicyKit helper to configure cups with fine-grained
>> privileges")
>
> Should be “CUPS” instead of “cups”.

Sure, I'll update.

>> +    (description
>> +     "This package provides the org.opensuse.CupsPkHelper.Mechanism DBus
>> +system service which uses @file{cups-pk-helper-mechanism}.  This package
>> +should only be used as part of the Guix cups-pk-helper service.")
>
> I’d wrap the service names in @code{…}.
>
> Why can it not be used without the cups-pk-helper service?  Is it not
> enough to install the package in a location that gets searched by DBus?

I'm not sure if I'm correct here, but it looks like this might be the
case from looking at the DBus stuff in the package.

The DBus service contains "system-services" in the name, which is
different from some other packages DBus configuration.

/gnu/store/...-cups-pk-helper-0.2.6/share/dbus-1/system-services/org.opensuse.CupsPkHelper.Mechanism.service

Also, in that file, it says "User=root".

[D-BUS Service]
Name=org.opensuse.CupsPkHelper.Mechanism
Exec=/gnu/store/...-cups-pk-helper-0.2.6/libexec/cups-pk-helper-mechanism
User=root

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Message #35 received at 34240 <at> debbugs.gnu.org (full text, mbox):

From: Ricardo Wurmus <rekado <at> elephly.net>
To: Christopher Baines <mail <at> cbaines.net>
Cc: 34240 <at> debbugs.gnu.org
Subject: Re: [bug#34240] [PATCH 5/5] gnu: gnome: Include system-config-printer.
Date: Tue, 29 Jan 2019 17:50:22 +0100

Christopher Baines <mail <at> cbaines.net> writes:

> This package enables some functionality for printers within the
> gnome-control-center as well as providing a standalone configuration tool.
>
> At the moment, due to the lack of PackageKit support within Guix, the
> gnome-control-center can't help users through the process of installing this,
> so make it a default package.
>
> * gnu/packages/gnome.scm (gnome)[propagated-inputs]: Add system-config-printer.
> ---
>  gnu/packages/gnome.scm | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/gnu/packages/gnome.scm b/gnu/packages/gnome.scm
> index 0982409eeb..3a3e98a8fe 100644
> --- a/gnu/packages/gnome.scm
> +++ b/gnu/packages/gnome.scm
> @@ -6155,6 +6155,7 @@ associations for GNOME.")
>         ("pinentry-gnome3"           ,pinentry-gnome3)
>         ("pulseaudio"                ,pulseaudio)
>         ("shared-mime-info"          ,shared-mime-info)
> +       ("system-config-printer"     ,system-config-printer)
>         ("totem"                     ,totem)
>         ("xdg-user-dirs"             ,xdg-user-dirs)
>         ("yelp"                      ,yelp)

Looks good to me.

-- 
Ricardo

Message #38 received at 34240 <at> debbugs.gnu.org (full text, mbox):

From: Ricardo Wurmus <rekado <at> elephly.net>
To: Christopher Baines <mail <at> cbaines.net>
Cc: 34240 <at> debbugs.gnu.org
Subject: Re: [bug#34240] [PATCH 2/5] services: Add cups-pk-helper.
Date: Tue, 29 Jan 2019 17:44:05 +0100

Christopher Baines <mail <at> cbaines.net> writes:

> This service integrates cups and PolicyKit. The gnome-control-center printing
> section uses this functionality.
>
> * gnu/sevices/desktop.scm (cups-pk-helper-service-type): New variable.
> (%desktop-services): Add the cups-pk-helper service.

I wonder if this service is really needed or if it would be enough to
install the package into the system profile, for example.

(It looks fine to me, but I’m still curious.)

-- 
Ricardo

Message #41 received at 34240 <at> debbugs.gnu.org (full text, mbox):

From: Ricardo Wurmus <rekado <at> elephly.net>
To: Christopher Baines <mail <at> cbaines.net>
Cc: 34240 <at> debbugs.gnu.org
Subject: Re: [bug#34240] [PATCH 4/5] gnu: Add system-config-printer.
Date: Tue, 29 Jan 2019 17:49:58 +0100

Christopher Baines <mail <at> cbaines.net> writes:

> * gnu/packages/gnome.scm (system-config-printer): New variable.
[…]
> +    (arguments
> +     `(#:imported-modules ((guix build python-build-system)
> +                           ,@%glib-or-gtk-build-system-modules)
> +       #:phases
> +       (modify-phases %standard-phases
> +         (add-after 'unpack 'patch-Makefile.am
> +           (lambda _
> +             ;; The Makefile generates some scripts, so set a valid shebang
> +             (substitute* "Makefile.am"
> +               (("/bin/bash") (which "bash")))
> +             #t))
[…]
> +         (add-before 'configure 'bootstrap
> +           (lambda _
> +             ;; Run ./bootstrap as otherwise the build fails with
> +             ;; automake-1.15: command not found
> +             (invoke "./bootstrap")
> +             #t))

The build system already provides a “bootstrap” phase, so maybe it would
be better to delete “configure” in “patch-Makefile.am” to activate the
bootstrap phase.

Otherwise looks good to me.  Thanks!

--
Ricardo

Message #46 received at 34240-done <at> debbugs.gnu.org (full text, mbox):

From: Christopher Baines <mail <at> cbaines.net>
To: Ricardo Wurmus <rekado <at> elephly.net>
Cc: 34240-done <at> debbugs.gnu.org
Subject: Re: [bug#34240] [PATCH 4/5] gnu: Add system-config-printer.
Date: Wed, 13 Feb 2019 08:21:04 +0000

[Message part 1 (text/plain, inline)]

Ricardo Wurmus <rekado <at> elephly.net> writes:

> Christopher Baines <mail <at> cbaines.net> writes:
>
>> * gnu/packages/gnome.scm (system-config-printer): New variable.
> […]
>> +    (arguments
>> +     `(#:imported-modules ((guix build python-build-system)
>> +                           ,@%glib-or-gtk-build-system-modules)
>> +       #:phases
>> +       (modify-phases %standard-phases
>> +         (add-after 'unpack 'patch-Makefile.am
>> +           (lambda _
>> +             ;; The Makefile generates some scripts, so set a valid shebang
>> +             (substitute* "Makefile.am"
>> +               (("/bin/bash") (which "bash")))
>> +             #t))
> […]
>> +         (add-before 'configure 'bootstrap
>> +           (lambda _
>> +             ;; Run ./bootstrap as otherwise the build fails with
>> +             ;; automake-1.15: command not found
>> +             (invoke "./bootstrap")
>> +             #t))
>
> The build system already provides a “bootstrap” phase, so maybe it would
> be better to delete “configure” in “patch-Makefile.am” to activate the
> bootstrap phase.
>
> Otherwise looks good to me.  Thanks!

Great, I've made that change to the system-config-printer phases and
pushed these patches now.

Thanks,

Chris

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