[bug#31307] [PATCH] Add MAT, the Metadata Anonymisation Toolkit from Boum

[bug#31307] [PATCH] Add MAT, the Metadata Anonymisation Toolkit from Boum

[Chris Marusich]

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Hi Guix,

This patch adds MAT, the Metadata Anonymisation Toolkit from Boum.  I've
successfully used its CLI tool to purge metadata from JPEG image files;
I verified using exiftool that it works for this purpose.  However, not
all of its features work (see the TODO for details), and more
importantly, the website says people shouldn't use it.  For these
reasons, I'm not sure if we should add it, so I'd like to ask for your
opinion.

The author state on their website:

  https://mat.boum.org/

  Current status

  The MAT maintenance and development is currently on hold, mostly for
  health reasons. I might go back to it at some point in the future.

  The current version might have bugs, and doesn't work on Python3: Please
  avoid using it.

However, packages exist for some distributions.  For example, here's a
MAT package for Debian:

  https://packages.qa.debian.org/m/mat.html

And like I said, the CLI tool does seem to work.

Should we refrain from adding this package simply because the author is
not maintaining it any more?  I'm inclined to say "no", but one also has
to consider whether it is a a good idea to encourage people to use an
unmaintained tool for protecting their privacy/anonymity.  I'm not sure.

In addition, I notice that the license is GPL 2, but it seems the author
did not specify whether "any later version" can be used.  Therefore, I
have listed this as gpl2, instead of gpl2+.

What do you think?

-- 
Chris

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From c30a26364fdf919deb9bc6bd907b75de58a17a7b Mon Sep 17 00:00:00 2001
From: Chris Marusich <cmmarusich@gmail.com>
Date: Sat, 28 Apr 2018 14:03:47 -0700
Subject: [PATCH] gnu: Add mat.

* gnu/packages/photo.scm (mat): New variable.
---
 gnu/packages/photo.scm | 52 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/gnu/packages/photo.scm b/gnu/packages/photo.scm
index 2c0c2313f..a6380cc63 100644
--- a/gnu/packages/photo.scm
+++ b/gnu/packages/photo.scm
@@ -26,6 +26,7 @@
   #:use-module (guix build-system cmake)
   #:use-module (guix build-system gnu)
   #:use-module (guix build-system perl)
+  #:use-module (guix build-system python)
   #:use-module (guix download)
   #:use-module ((guix licenses) #:prefix license:)
   #:use-module (guix packages)
@@ -52,6 +53,7 @@
   #:use-module (gnu packages llvm)
   #:use-module (gnu packages man)
   #:use-module (gnu packages maths)
+  #:use-module (gnu packages music)
   #:use-module (gnu packages perl)
   #:use-module (gnu packages pkg-config)
   #:use-module (gnu packages popt)
@@ -521,3 +523,53 @@ workflow by facilitating the handling of large numbers of images.  Most raw
 formats are supported, including Pentax Pixel Shift, Canon Dual-Pixel, and those
 from Foveon and X-Trans sensors.")
     (license license:gpl3+)))
+
+;; TODO: Add inputs for PDF support (e.g., Poppler, python-pdfrw).
+;; TODO: Add inputs for GUI support (e.g., gi).
+;; TODO: Fix some hard-coded paths.  For example, get_datafile_path embeds
+;; paths like "/usr/local/share/mat", which we should probably rewrite so that
+;; they point to mat's output directory in the store.  This specific example
+;; causes "mat --list" to fail with an exception.
+(define-public python2-mat
+  (package
+    (name "python2-mat")
+    (version "0.6.1")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append
+                    "https://mat.boum.org/files/mat-" version ".tar.xz"))
+              (sha256
+               (base32
+                "1faiiq7cjspafjjf4kmm7bbn8m506qgcijbizpgdvlaaapdyg0h7"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:python ,python-2
+       #:use-setuptools? #f))
+    (propagated-inputs
+     `(("python2-pycairo" ,python2-pycairo)
+       ("python2-mutagen" ,python2-mutagen)
+       ("perl-image-exiftool" ,perl-image-exiftool)))
+    (native-inputs
+     `(("python2-distutils-extra" ,python2-distutils-extra)
+       ("intltool" ,intltool)))
+    (synopsis "Anonymize/remove metadata from files")
+    (description
+     "MAT (Metadata Anonymisation Toolkit) is a toolbox composed of a GUI
+application, a CLI application and a library, to anonymize/remove metadata
+from files.  It supports the following file formats:
+
+@itemize @bullet
+@item Portable Network Graphics (.png)
+@item Joint Photographic Experts Group (.jpg, .jpeg, etc.)
+@item Tagged Image File Format (.tif, tiff, etc.)
+@item Open Documents (.odt, .odx, .ods, etc.)
+@item Office OpenXml (.docx, .pptx, .xlsx, etc.)
+@item Portable Document Fileformat (.pdf)
+@item Tape Archives (.tar, .tar.bz2, etc.)
+@item Moving Picture Experts Group (MPEG) (.mp3, .mp2, .mp1, etc.)
+@item Ogg Vorbis (.ogg, etc.)
+@item Free Lossless Audio Codec (.flac)
+@item Torrent (.torrent)
+@end itemize")
+    (home-page "https://mat.boum.org")
+    (license license:gpl2)))
-- 
2.17.0


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[bug#31307] [PATCH] Add MAT, the Metadata Anonymisation Toolkit from Boum

[Nils Gillmann]

Chris Marusich transcribed 5.9K bytes:
> Hi Guix,
> 
> This patch adds MAT, the Metadata Anonymisation Toolkit from Boum.  I've

Nice! This one has been a "low-hanging fruit" on my roadmap for a very long time.
Good to see it.

> successfully used its CLI tool to purge metadata from JPEG image files;
> I verified using exiftool that it works for this purpose.  However, not
> all of its features work (see the TODO for details), and more
> importantly, the website says people shouldn't use it.  For these
> reasons, I'm not sure if we should add it, so I'd like to ask for your
> opinion.
> 
> The author state on their website:
> 
>   https://mat.boum.org/
> 
>   Current status
> 
>   The MAT maintenance and development is currently on hold, mostly for
>   health reasons. I might go back to it at some point in the future.
> 
>   The current version might have bugs, and doesn't work on Python3: Please
>   avoid using it.
> 
> However, packages exist for some distributions.  For example, here's a
> MAT package for Debian:
> 
>   https://packages.qa.debian.org/m/mat.html
> 
> And like I said, the CLI tool does seem to work.
> 
> Should we refrain from adding this package simply because the author is
> not maintaining it any more?  I'm inclined to say "no", but one also has
> to consider whether it is a a good idea to encourage people to use an
> unmaintained tool for protecting their privacy/anonymity.  I'm not sure.
> 
> In addition, I notice that the license is GPL 2, but it seems the author
> did not specify whether "any later version" can be used.  Therefore, I
> have listed this as gpl2, instead of gpl2+.

The tails people (iirc it is a tails project, who are hosted on boum.org infra)
are generally okay with questions, I think you should ask about wether it's GPL2 or GPL2+.

We could also ask them about the state of MAT, as once upon a time they used to
include it in Tails. No idea if they stil do.

> What do you think?
> 
> -- 
> Chris

> From c30a26364fdf919deb9bc6bd907b75de58a17a7b Mon Sep 17 00:00:00 2001
> From: Chris Marusich <cmmarusich@gmail.com>
> Date: Sat, 28 Apr 2018 14:03:47 -0700
> Subject: [PATCH] gnu: Add mat.
> 
> * gnu/packages/photo.scm (mat): New variable.
> ---
>  gnu/packages/photo.scm | 52 ++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 52 insertions(+)
> 
> diff --git a/gnu/packages/photo.scm b/gnu/packages/photo.scm
> index 2c0c2313f..a6380cc63 100644
> --- a/gnu/packages/photo.scm
> +++ b/gnu/packages/photo.scm
> @@ -26,6 +26,7 @@
>    #:use-module (guix build-system cmake)
>    #:use-module (guix build-system gnu)
>    #:use-module (guix build-system perl)
> +  #:use-module (guix build-system python)
>    #:use-module (guix download)
>    #:use-module ((guix licenses) #:prefix license:)
>    #:use-module (guix packages)
> @@ -52,6 +53,7 @@
>    #:use-module (gnu packages llvm)
>    #:use-module (gnu packages man)
>    #:use-module (gnu packages maths)
> +  #:use-module (gnu packages music)
>    #:use-module (gnu packages perl)
>    #:use-module (gnu packages pkg-config)
>    #:use-module (gnu packages popt)
> @@ -521,3 +523,53 @@ workflow by facilitating the handling of large numbers of images.  Most raw
>  formats are supported, including Pentax Pixel Shift, Canon Dual-Pixel, and those
>  from Foveon and X-Trans sensors.")
>      (license license:gpl3+)))
> +
> +;; TODO: Add inputs for PDF support (e.g., Poppler, python-pdfrw).
> +;; TODO: Add inputs for GUI support (e.g., gi).
> +;; TODO: Fix some hard-coded paths.  For example, get_datafile_path embeds
> +;; paths like "/usr/local/share/mat", which we should probably rewrite so that
> +;; they point to mat's output directory in the store.  This specific example
> +;; causes "mat --list" to fail with an exception.

I'm all for making it less hard for a package to get initially into Guix, but
shouldn't at least hardcoded paths that make an often used function(?) be fixed
first? On the other hand it is functional as you wrote.

> +(define-public python2-mat
> +  (package
> +    (name "python2-mat")

Since people will expect this as "MAT" or "mat" and not "python2-mat", and to my
knowledge there is no python3 variant, we should name it just mat.

> +    (version "0.6.1")
> +    (source (origin
> +              (method url-fetch)
> +              (uri (string-append
> +                    "https://mat.boum.org/files/mat-" version ".tar.xz"))
> +              (sha256
> +               (base32
> +                "1faiiq7cjspafjjf4kmm7bbn8m506qgcijbizpgdvlaaapdyg0h7"))))
> +    (build-system python-build-system)
> +    (arguments
> +     `(#:python ,python-2
> +       #:use-setuptools? #f))
> +    (propagated-inputs
> +     `(("python2-pycairo" ,python2-pycairo)
> +       ("python2-mutagen" ,python2-mutagen)
> +       ("perl-image-exiftool" ,perl-image-exiftool)))
> +    (native-inputs
> +     `(("python2-distutils-extra" ,python2-distutils-extra)
> +       ("intltool" ,intltool)))
> +    (synopsis "Anonymize/remove metadata from files")
> +    (description
> +     "MAT (Metadata Anonymisation Toolkit) is a toolbox composed of a GUI
> +application, a CLI application and a library, to anonymize/remove metadata
> +from files.  It supports the following file formats:
> +
> +@itemize @bullet
> +@item Portable Network Graphics (.png)
> +@item Joint Photographic Experts Group (.jpg, .jpeg, etc.)
> +@item Tagged Image File Format (.tif, tiff, etc.)
> +@item Open Documents (.odt, .odx, .ods, etc.)
> +@item Office OpenXml (.docx, .pptx, .xlsx, etc.)
> +@item Portable Document Fileformat (.pdf)
> +@item Tape Archives (.tar, .tar.bz2, etc.)
> +@item Moving Picture Experts Group (MPEG) (.mp3, .mp2, .mp1, etc.)
> +@item Ogg Vorbis (.ogg, etc.)
> +@item Free Lossless Audio Codec (.flac)
> +@item Torrent (.torrent)
> +@end itemize")
> +    (home-page "https://mat.boum.org")
> +    (license license:gpl2)))
> -- 
> 2.17.0
> 

[bug#31307] [PATCH] Add MAT, the Metadata Anonymisation Toolkit from Boum

[Chris Marusich]

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Nils Gillmann <ng0@n0.is> writes:

>> In addition, I notice that the license is GPL 2, but it seems the author
>> did not specify whether "any later version" can be used.  Therefore, I
>> have listed this as gpl2, instead of gpl2+.
>
> The tails people (iirc it is a tails project, who are hosted on boum.org infra)
> are generally okay with questions, I think you should ask about wether
> it's GPL2 or GPL2+.
>
> We could also ask them about the state of MAT, as once upon a time they used to
> include it in Tails. No idea if they stil do.

I've sent an email to tails-dev@boum.org.  I Cc'd you on it.  I wasn't
sure if the people of the tails-dev@boum.org email list would appreciate
it if I arranged for their replies to automatically be recorded in our
bug tracker, so I opted not to Cc this bug report on the email.

We'll see what they say!

>> +;; TODO: Add inputs for PDF support (e.g., Poppler, python-pdfrw).
>> +;; TODO: Add inputs for GUI support (e.g., gi).
>> +;; TODO: Fix some hard-coded paths.  For example, get_datafile_path embeds
>> +;; paths like "/usr/local/share/mat", which we should probably rewrite so that
>> +;; they point to mat's output directory in the store.  This specific example
>> +;; causes "mat --list" to fail with an exception.
>
> I'm all for making it less hard for a package to get initially into Guix, but
> shouldn't at least hardcoded paths that make an often used function(?) be fixed
> first? On the other hand it is functional as you wrote.

I've fixed this in the latest patch version (see attached)!

While testing, I also discovered that the -b feature of the CLI tool
does not work because of what appears to be a simple bug in MAT.  I
suppose I will report that upstream if they get back to me and they're
still maintaining it.

>> +(define-public python2-mat
>> +  (package
>> +    (name "python2-mat")
>
> Since people will expect this as "MAT" or "mat" and not "python2-mat", and to my
> knowledge there is no python3 variant, we should name it just mat.

On this topic, the precedent goes both ways, and I haven't seen any
guidance yet on the email lists or in the manual.  For example, see
packages like awscli, python2-s3cmd, jupyter, and python-ansi2html.

I think that if a package provides only an application, it makes sense
to give it a name without the "python" or "python2" prefix.  However, if
the package provides a library, or it provides a library in addition to
an application, then I think it's better to refer to it using the
"python" or "python2" prefix, as described in the section titled "Python
Modules" in the Guix manual.  I also think this aligns with Guix's trend
towards (usually) keeping libraries in the default "out" output of a
package, rather than putting libraries in a separate "lib" output or a
separate "devel" package.

-- 
Chris

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From c34de8c711b9a61b43a003ebf44423a2af6138a4 Mon Sep 17 00:00:00 2001
From: Chris Marusich <cmmarusich@gmail.com>
Date: Sat, 28 Apr 2018 14:03:47 -0700
Subject: [PATCH] gnu: Add python2-mat.

* gnu/packages/photo.scm (python2-mat): New variable.
---
 gnu/packages/photo.scm | 64 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)

diff --git a/gnu/packages/photo.scm b/gnu/packages/photo.scm
index 2c0c2313f..79bb0f58b 100644
--- a/gnu/packages/photo.scm
+++ b/gnu/packages/photo.scm
@@ -6,6 +6,7 @@
 ;;; Copyright © 2017 Roel Janssen <roel@gnu.org>
 ;;; Copyright © 2018 Tobias Geerinckx-Rice <me@tobias.gr>
 ;;; Copyright © 2018 Leo Famulari <leo@famulari.name>
+;;; Copyright © 2018 Chris Marusich <cmmarusich@gmail.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -26,6 +27,7 @@
   #:use-module (guix build-system cmake)
   #:use-module (guix build-system gnu)
   #:use-module (guix build-system perl)
+  #:use-module (guix build-system python)
   #:use-module (guix download)
   #:use-module ((guix licenses) #:prefix license:)
   #:use-module (guix packages)
@@ -52,6 +54,7 @@
   #:use-module (gnu packages llvm)
   #:use-module (gnu packages man)
   #:use-module (gnu packages maths)
+  #:use-module (gnu packages music)
   #:use-module (gnu packages perl)
   #:use-module (gnu packages pkg-config)
   #:use-module (gnu packages popt)
@@ -521,3 +524,64 @@ workflow by facilitating the handling of large numbers of images.  Most raw
 formats are supported, including Pentax Pixel Shift, Canon Dual-Pixel, and those
 from Foveon and X-Trans sensors.")
     (license license:gpl3+)))
+
+;; TODO: Add inputs for PDF support (e.g., Poppler, python-pdfrw).
+;; TODO: Add inputs for GUI support (e.g., gi).
+;; TODO: Fix some hard-coded paths.  For example, get_datafile_path embeds
+;; paths like "/usr/local/share/mat", which we should probably rewrite so that
+;; they point to mat's output directory in the store.  This specific example
+;; causes "mat --list" to fail with an exception.
+(define-public python2-mat
+  (package
+    (name "python2-mat")
+    (version "0.6.1")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append
+                    "https://mat.boum.org/files/mat-" version ".tar.xz"))
+              (sha256
+               (base32
+                "1faiiq7cjspafjjf4kmm7bbn8m506qgcijbizpgdvlaaapdyg0h7"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:python ,python-2
+       #:use-setuptools? #f
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'patch-source-shebangs 'patch-absolute-paths
+           (lambda* (#:key outputs #:allow-other-keys)
+             ;; MAT tries to find things in /usr/local/share and /usr/share.
+             ;; However, the things it's looking for are actually in the
+             ;; /share directory of its output, instead.
+             (substitute* "libmat/mat.py"
+               (("(\"|')/usr(/local)?/share" _ quote-mark)
+                (string-append
+                 quote-mark (assoc-ref outputs "out") "/share"))))))))
+    (propagated-inputs
+     `(("python2-pycairo" ,python2-pycairo)
+       ("python2-mutagen" ,python2-mutagen)
+       ("perl-image-exiftool" ,perl-image-exiftool)))
+    (native-inputs
+     `(("python2-distutils-extra" ,python2-distutils-extra)
+       ("intltool" ,intltool)))
+    (synopsis "Anonymize/remove metadata from files")
+    (description
+     "MAT (Metadata Anonymisation Toolkit) is a toolbox composed of a GUI
+application, a CLI application and a library, to anonymize/remove metadata
+from files.  It supports the following file formats:
+
+@itemize @bullet
+@item Portable Network Graphics (.png)
+@item Joint Photographic Experts Group (.jpg, .jpeg, etc.)
+@item Tagged Image File Format (.tif, tiff, etc.)
+@item Open Documents (.odt, .odx, .ods, etc.)
+@item Office OpenXml (.docx, .pptx, .xlsx, etc.)
+@item Portable Document Fileformat (.pdf)
+@item Tape Archives (.tar, .tar.bz2, etc.)
+@item Moving Picture Experts Group (MPEG) (.mp3, .mp2, .mp1, etc.)
+@item Ogg Vorbis (.ogg, etc.)
+@item Free Lossless Audio Codec (.flac)
+@item Torrent (.torrent)
+@end itemize")
+    (home-page "https://mat.boum.org")
+    (license license:gpl2)))
-- 
2.17.0


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[bug#31307] [PATCH] Add MAT, the Metadata Anonymisation Toolkit from Boum

[Chris Marusich]

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Chris Marusich <cmmarusich@gmail.com> writes:

Here's a new patch that fixes a few more things (but not the -b bug).

I noticed that when MAT's tests ran, out of 33 tests total, there were 3
failures, and 8 errors.  Curiously, this did not cause the build to
fail.  The 3 failures have something to do with not being able to
process a .docx file.  The 8 errors seem to occur because a variable
"current_file" in the test has an unexpected value (None).  If we decide
to add this package, we should probably fix or disable the tests and
find out why the test failures did not cause the build to fail.

I attempted to get MAT's GUI component working, but I was unsuccessful.
To build the GUI component, it seems we would first need to add Python
bindings for libpoppler, such as python-poppler [1], and python-poppler
can't be built without some extra love and patches [2][3].

Footnotes: 
[1]  https://launchpad.net/poppler-python

[2]  https://bugs.launchpad.net/poppler-python/+bug/1528489

[3]  https://gitweb.gentoo.org/repo/gentoo.git/tree/dev-python/python-poppler

-- 
Chris

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From 3060d99c1d23287f2090720c669f974cf9b451a5 Mon Sep 17 00:00:00 2001
From: Chris Marusich <cmmarusich@gmail.com>
Date: Sat, 28 Apr 2018 14:03:47 -0700
Subject: [PATCH] gnu: Add python2-mat.

* gnu/packages/photo.scm (python2-mat): New variable.
---
 gnu/packages/photo.scm | 71 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)

diff --git a/gnu/packages/photo.scm b/gnu/packages/photo.scm
index 2c0c2313f..18dce878e 100644
--- a/gnu/packages/photo.scm
+++ b/gnu/packages/photo.scm
@@ -6,6 +6,7 @@
 ;;; Copyright © 2017 Roel Janssen <roel@gnu.org>
 ;;; Copyright © 2018 Tobias Geerinckx-Rice <me@tobias.gr>
 ;;; Copyright © 2018 Leo Famulari <leo@famulari.name>
+;;; Copyright © 2018 Chris Marusich <cmmarusich@gmail.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -26,6 +27,7 @@
   #:use-module (guix build-system cmake)
   #:use-module (guix build-system gnu)
   #:use-module (guix build-system perl)
+  #:use-module (guix build-system python)
   #:use-module (guix download)
   #:use-module ((guix licenses) #:prefix license:)
   #:use-module (guix packages)
@@ -52,6 +54,7 @@
   #:use-module (gnu packages llvm)
   #:use-module (gnu packages man)
   #:use-module (gnu packages maths)
+  #:use-module (gnu packages music)
   #:use-module (gnu packages perl)
   #:use-module (gnu packages pkg-config)
   #:use-module (gnu packages popt)
@@ -521,3 +524,71 @@ workflow by facilitating the handling of large numbers of images.  Most raw
 formats are supported, including Pentax Pixel Shift, Canon Dual-Pixel, and those
 from Foveon and X-Trans sensors.")
     (license license:gpl3+)))
+
+;; TODO: Add inputs for PDF support (e.g., Poppler bindings, python-pdfrw).
+;; TODO: Add inputs for GUI support (e.g., gi - maybe gi is python-gobject?).
+(define-public python2-mat
+  (package
+    (name "python2-mat")
+    (version "0.6.1")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append
+                    "https://mat.boum.org/files/mat-" version ".tar.xz"))
+              (sha256
+               (base32
+                "1faiiq7cjspafjjf4kmm7bbn8m506qgcijbizpgdvlaaapdyg0h7"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:python ,python-2
+       #:use-setuptools? #f
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'patch-source-shebangs 'fix-paths
+           (lambda* (#:key inputs outputs #:allow-other-keys)
+             (let ((share (string-append
+                           (assoc-ref outputs "out") "/share"))
+                   (exiftool (string-append
+                              (assoc-ref inputs "perl-image-exiftool")
+                              "/bin/exiftool"))
+                   (shred (string-append
+                           (assoc-ref inputs "coreutils") "/bin/shred")))
+               (substitute* (find-files "." "\\.py$")
+                 ;; MAT tries to find things in /usr/local/share and
+                 ;; /usr/share.  However, the things it's looking for are
+                 ;; actually in the /share directory of its output, instead.
+                 (("'/usr(/local)?/share")
+                  (string-append "'" share))
+                 (("'exiftool'")
+                  (string-append "'" exiftool "'"))
+                 (("'g?shred'")
+                  (string-append "'" shred "'")))
+               #t))))))
+    (propagated-inputs
+     `(("python2-pycairo" ,python2-pycairo)
+       ("python2-mutagen" ,python2-mutagen)
+       ("perl-image-exiftool" ,perl-image-exiftool)))
+    (native-inputs
+     `(("python2-distutils-extra" ,python2-distutils-extra)
+       ("intltool" ,intltool)))
+    (synopsis "Anonymize/remove metadata from files")
+    (description
+     "MAT (Metadata Anonymisation Toolkit) is a toolbox composed of a GUI
+application, a CLI application and a library, to anonymize/remove metadata
+from files.  It supports the following file formats:
+
+@itemize @bullet
+@item Portable Network Graphics (.png)
+@item Joint Photographic Experts Group (.jpg, .jpeg, etc.)
+@item Tagged Image File Format (.tif, tiff, etc.)
+@item Open Documents (.odt, .odx, .ods, etc.)
+@item Office OpenXml (.docx, .pptx, .xlsx, etc.)
+@item Portable Document Fileformat (.pdf)
+@item Tape Archives (.tar, .tar.bz2, etc.)
+@item Moving Picture Experts Group (MPEG) (.mp3, .mp2, .mp1, etc.)
+@item Ogg Vorbis (.ogg, etc.)
+@item Free Lossless Audio Codec (.flac)
+@item Torrent (.torrent)
+@end itemize")
+    (home-page "https://mat.boum.org")
+    (license license:gpl2)))
-- 
2.17.0


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[bug#31307] [PATCH] Add MAT, the Metadata Anonymisation Toolkit from Boum

[Chris Marusich]

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Chris Marusich <cmmarusich@gmail.com> writes:

> We'll see what they say!

Upstream has confirmed that the license is GPLv2:

https://mailman.boum.org/pipermail/mat-dev/2018-April/000158.html

They also confirmed the following:

* MAT is not actively maintained and doesn't run under Python 3.

* MAT2 is under development.

* MAT has some known limitations, "like leaving metadata in file
embedded in PDF, like images."

That said, even upstream said that we should go with MAT, since there is
no known better alternative, and later we can switch to MAT2.  I think
we should add it, without worrying about making the GUI work, and we
should add these warnings to the package description.

Thoughts?

-- 
Chris

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[bug#31307] [PATCH] Add MAT, the Metadata Anonymisation Toolkit from Boum

[Nils Gillmann]

Chris Marusich transcribed 1.7K bytes:
> Chris Marusich <cmmarusich@gmail.com> writes:
> 
> > We'll see what they say!
> 
> Upstream has confirmed that the license is GPLv2:
> 
> https://mailman.boum.org/pipermail/mat-dev/2018-April/000158.html
> 
> They also confirmed the following:
> 
> * MAT is not actively maintained and doesn't run under Python 3.
> 
> * MAT2 is under development.
> 
> * MAT has some known limitations, "like leaving metadata in file
> embedded in PDF, like images."
> 
> That said, even upstream said that we should go with MAT, since there is
> no known better alternative, and later we can switch to MAT2.  I think
> we should add it, without worrying about making the GUI work, and we
> should add these warnings to the package description.
> 
> Thoughts?

Okay for me.

> -- 
> Chris

[bug#31307] [PATCH] Add MAT, the Metadata Anonymisation Toolkit from Boum

[Ludovic Courtès]

Hello Chris,

Chris Marusich <cmmarusich@gmail.com> skribis:

> Should we refrain from adding this package simply because the author is
> not maintaining it any more?  I'm inclined to say "no", but one also has
> to consider whether it is a a good idea to encourage people to use an
> unmaintained tool for protecting their privacy/anonymity.  I'm not sure.

It’s risky, indeed.  As time passes it’s likely to have more and more
known-but-unfixed security issues, which isn’t great.  Leo, thoughts on
this situation?

> In addition, I notice that the license is GPL 2, but it seems the author
> did not specify whether "any later version" can be used.  Therefore, I
> have listed this as gpl2, instead of gpl2+.

Note that unless authors explicitly removed the “or any later version”
phrase from license headers in source files, we write ‘gpl2+’;
specifically, Section 9 of GPLv2 reads:

  If the Program does not specify a version number of this License, you
  may choose any version ever published by the Free Software Foundation.

Thanks,
Ludo’.

[bug#31307] [PATCH] Add MAT, the Metadata Anonymisation Toolkit from Boum

[Chris Marusich]

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ludo@gnu.org (Ludovic Courtès) writes:

>> In addition, I notice that the license is GPL 2, but it seems the author
>> did not specify whether "any later version" can be used.  Therefore, I
>> have listed this as gpl2, instead of gpl2+.
>
> Note that unless authors explicitly removed the “or any later version”
> phrase from license headers in source files, we write ‘gpl2+’;
> specifically, Section 9 of GPLv2 reads:
>
>   If the Program does not specify a version number of this License, you
>   may choose any version ever published by the Free Software Foundation.

Upstream clarified in an email [1] that the license is GPLv2.  Also,
they did explicitly remove the "or any later version" part in the
README.md file; I just missed that detail at first.  However, there is
no license embedded in the source files themselves.  In this case, is is
correct to add this package as GPLv2?

Footnotes: 
[1]  https://mailman.boum.org/pipermail/mat-dev/2018-April/000158.html

-- 
Chris

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[bug#31307] [PATCH] Add MAT, the Metadata Anonymisation Toolkit from Boum

[Leo Famulari]

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On Sat, May 05, 2018 at 02:37:34PM -0700, Chris Marusich wrote:
> Upstream clarified in an email [1] that the license is GPLv2.  Also,
> they did explicitly remove the "or any later version" part in the
> README.md file; I just missed that detail at first.  However, there is
> no license embedded in the source files themselves.  In this case, is is
> correct to add this package as GPLv2?

My understanding as a non-expert is that the "or later" is always at the
discretion of the author. So GPLv2 without "or later" is GPLv2, and
that's how we can distribute it.

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[bug#31307] [PATCH] Add MAT, the Metadata Anonymisation Toolkit from Boum

[Leo Famulari]

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On Sat, May 05, 2018 at 10:33:45PM +0200, Ludovic Courtès wrote:
> Chris Marusich <cmmarusich@gmail.com> skribis:
> > Should we refrain from adding this package simply because the author is
> > not maintaining it any more?  I'm inclined to say "no", but one also has
> > to consider whether it is a a good idea to encourage people to use an
> > unmaintained tool for protecting their privacy/anonymity.  I'm not sure.
> 
> It’s risky, indeed.  As time passes it’s likely to have more and more
> known-but-unfixed security issues, which isn’t great.  Leo, thoughts on
> this situation?

I see two different issues here:

1) The project is unmaintained (last release 2016) and the underlying
platform (Python 2) will become unmaintained in January 2020.

I think these maintenance issues are not a blocker in this case. We
package lots of software that has been basically abandoned for longer
than MAT. Its source repo saw activity in March. On this subject, we
should think about building from HEAD since those new commits will
probably never be "released".

2) The software is not guaranteed to achieve its goals.

I think the idea of "anonymizing" a file is always going to be
manifested as a goal rather than a full solution. No matter the level of
upstream maintenance, anonymity can never be guaranteed.

So, I think it's okay to add the package with a big warning in the
description, maybe even saying something scary like "only recommended
for educational and research activity".

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[bug#31307] [PATCH] Add MAT, the Metadata Anonymisation Toolkit from Boum

[Ludovic Courtès]

Hello,

Leo Famulari <leo@famulari.name> skribis:

> I see two different issues here:
>
> 1) The project is unmaintained (last release 2016) and the underlying
> platform (Python 2) will become unmaintained in January 2020.
>
> I think these maintenance issues are not a blocker in this case. We
> package lots of software that has been basically abandoned for longer
> than MAT. Its source repo saw activity in March. On this subject, we
> should think about building from HEAD since those new commits will
> probably never be "released".
>
> 2) The software is not guaranteed to achieve its goals.
>
> I think the idea of "anonymizing" a file is always going to be
> manifested as a goal rather than a full solution. No matter the level of
> upstream maintenance, anonymity can never be guaranteed.
>
> So, I think it's okay to add the package with a big warning in the
> description, maybe even saying something scary like "only recommended
> for educational and research activity".

Sounds reasonable to me.

Chris, what would you like to do with this package?

Ludo’.

[bug#31307] [PATCH] Add MAT, the Metadata Anonymisation Toolkit from Boum

[Chris Marusich]

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ludo@gnu.org (Ludovic Courtès) writes:

> Hello,
>
> Leo Famulari <leo@famulari.name> skribis:
>
>> I see two different issues here:
>>
>> 1) The project is unmaintained (last release 2016) and the underlying
>> platform (Python 2) will become unmaintained in January 2020.
>>
>> I think these maintenance issues are not a blocker in this case. We
>> package lots of software that has been basically abandoned for longer
>> than MAT. Its source repo saw activity in March. On this subject, we
>> should think about building from HEAD since those new commits will
>> probably never be "released".
>>
>> 2) The software is not guaranteed to achieve its goals.
>>
>> I think the idea of "anonymizing" a file is always going to be
>> manifested as a goal rather than a full solution. No matter the level of
>> upstream maintenance, anonymity can never be guaranteed.
>>
>> So, I think it's okay to add the package with a big warning in the
>> description, maybe even saying something scary like "only recommended
>> for educational and research activity".
>
> Sounds reasonable to me.
>
> Chris, what would you like to do with this package?

If we can resolve the issue with the tests and add a warning to the
package description, I'd be OK with adding it.  However, the tests
currently error out or fail, even though the package builds
successfully.  That's concerning, and I don't feel comfortable adding
the package, even with a warning, until it's been addressed.

I don't have a lot of time to work on this right now.  I will eventually
get around to it, but if somebody wants MAT sooner, please feel free to
take over and do it before I get around to it.

-- 
Chris

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[bug#31307] [PATCH] Add MAT, the Metadata Anonymisation Toolkit from Boum

[Nils Gillmann]

Leo Famulari transcribed 2.5K bytes:
> On Sat, May 05, 2018 at 10:33:45PM +0200, Ludovic Courtès wrote:
> > Chris Marusich <cmmarusich@gmail.com> skribis:
> > > Should we refrain from adding this package simply because the author is
> > > not maintaining it any more?  I'm inclined to say "no", but one also has
> > > to consider whether it is a a good idea to encourage people to use an
> > > unmaintained tool for protecting their privacy/anonymity.  I'm not sure.
> > 
> > It’s risky, indeed.  As time passes it’s likely to have more and more
> > known-but-unfixed security issues, which isn’t great.  Leo, thoughts on
> > this situation?
> 
> I see two different issues here:
> 
> 1) The project is unmaintained (last release 2016) and the underlying
> platform (Python 2) will become unmaintained in January 2020.
> 
> I think these maintenance issues are not a blocker in this case. We
> package lots of software that has been basically abandoned for longer
> than MAT. Its source repo saw activity in March. On this subject, we
> should think about building from HEAD since those new commits will
> probably never be "released".
> 
> 2) The software is not guaranteed to achieve its goals.
> 
> I think the idea of "anonymizing" a file is always going to be
> manifested as a goal rather than a full solution. No matter the level of
> upstream maintenance, anonymity can never be guaranteed.
> 
> So, I think it's okay to add the package with a big warning in the
> description, maybe even saying something scary like "only recommended
> for educational and research activity".

I agree (and hope we won't just drop python-2 in 2020 because that would
be unreasonable).

[bug#31307] [PATCH] Add MAT, the Metadata Anonymisation Toolkit from Boum

[Sarah Morgensen]

Hi all,

Nils Gillmann <ng0@n0.is> writes:

> Leo Famulari transcribed 2.5K bytes:
>> On Sat, May 05, 2018 at 10:33:45PM +0200, Ludovic Courtès wrote:
>> > Chris Marusich <cmmarusich@gmail.com> skribis:
>> > > Should we refrain from adding this package simply because the author is
>> > > not maintaining it any more?  I'm inclined to say "no", but one also has
>> > > to consider whether it is a a good idea to encourage people to use an
>> > > unmaintained tool for protecting their privacy/anonymity.  I'm not sure.
>> > 
>> > It’s risky, indeed.  As time passes it’s likely to have more and more
>> > known-but-unfixed security issues, which isn’t great.  Leo, thoughts on
>> > this situation?
>> 
>> I see two different issues here:
>> 
>> 1) The project is unmaintained (last release 2016) and the underlying
>> platform (Python 2) will become unmaintained in January 2020.
>> 
>> I think these maintenance issues are not a blocker in this case. We
>> package lots of software that has been basically abandoned for longer
>> than MAT. Its source repo saw activity in March. On this subject, we
>> should think about building from HEAD since those new commits will
>> probably never be "released".
>> 
>> 2) The software is not guaranteed to achieve its goals.
>> 
>> I think the idea of "anonymizing" a file is always going to be
>> manifested as a goal rather than a full solution. No matter the level of
>> upstream maintenance, anonymity can never be guaranteed.
>> 
>> So, I think it's okay to add the package with a big warning in the
>> description, maybe even saying something scary like "only recommended
>> for educational and research activity".
>
> I agree (and hope we won't just drop python-2 in 2020 because that would
> be unreasonable).

If someone wants to give this a try again, MAT 2 seems to be under
active development, and is based on python 3:

https://0xacab.org/jvoisin/mat2

It looks slick, and is GPL3+.

--
Sarah

[bug#31307] [PATCH] Add MAT, the Metadata Anonymisation Toolkit

[Denis 'GNUtoo' Carikli]

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Hi,

I found while browsing debbugs.gnu.org, and I've started working on
adding MAT2.

I've got it working, so I'm attaching my work as-is to avoid
duplication of work. Tests probably need to be disabled for it to work.

I didn't submit it yet because not only the package needs some cleanups
(that could have been fixed), but more importantly I also wanted to make
tests work as I was afraid that getting this package wrong could have
bad consequences for people if for some reasons it didn't cleanup the
metadata due to packaging issues.

Denis.

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;;; Copyright © 2021 Denis Carikli <GNUtoo@cyberdimension.org>
;;;
;;; This file is not part of GNU Guix (yet).
;;;
;;; This file is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; This file is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
(define-module (gnu packages mat2)
  #:use-module (guix build-system python)
  #:use-module (guix download)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (guix packages)
  #:use-module (gnu packages glib)
  #:use-module (gnu packages gnome)
  #:use-module (gnu packages gtk)
  #:use-module (gnu packages music)
  #:use-module (gnu packages pdf)
  #:use-module (gnu packages photo)
  #:use-module (gnu packages video)
  #:use-module (gnu packages virtualization))

(define-public mat2
  (package
    (name "mat2")
    (version "0.12.1")
    (source (origin
             (method url-fetch)
             (uri (string-append
		   ;; Also available at
		   ;; http://wmj5kiic7b6kjplpbvwadnht2nh2qnkbnqtcv3dyvpqtz7ssbssftxid.onion
		   "https://0xacab.org/jvoisin/mat2/-/archive/0.12.0/mat2-"
		    version ".tar.bz2"))
              (sha256
	       (base32
                "0lfip7g0rjvjspvwxyizknq2ccgrhfqp4ji7v0cch76srz12yb05"))))

    (build-system python-build-system)

;; - `python3-mutagen` for audio support
;; - `python3-gi-cairo` and `gir1.2-poppler-0.18` for PDF support
;; - `gir1.2-gdkpixbuf-2.0` for images support
;; - `gir1.2-rsvg-2.0` for svg support
;; - `FFmpeg`, optionally, for video support
;; - `libimage-exiftool-perl` for everything else
;; - `bubblewrap`, optionally, for sandboxing

    (inputs
     `(("python-mutagen" ,python-mutagen)           ;; for audio support
       ("python-pycairo" ,python-pycairo)           ;; for PDF support
       ("poppler", poppler)                         ;; for PDF support
       ("gdk-pixbuf", gdk-pixbuf)                   ;; for images support
       ("librsvg" ,librsvg)                         ;; for svg support
       ("ffmpeg" ,ffmpeg)                           ;; optional, for video support
       ("perl-image-exiftool", perl-image-exiftool) ;; for everything else
;;       ("bubblewrap", bubblewrap)                   ;; optional, for sandboxing
       ("python-pygobject" ,python-pygobject)       ;; used in tests
       ))
    ;; TODO
    (native-inputs
     `(("python-mutagen" ,python-mutagen)           ;; for audio support
       ("python-pycairo" ,python-pycairo)           ;; for PDF support
       ("poppler", poppler)                         ;; for PDF support
       ("gdk-pixbuf", gdk-pixbuf)                   ;; for images support
       ("librsvg" ,librsvg)                         ;; for svg support
       ("ffmpeg" ,ffmpeg)                           ;; optional, for video support
       ("perl-image-exiftool", perl-image-exiftool) ;; for everything else
;;       ("bubblewrap", bubblewrap)                   ;; optional, for sandboxing
       ("python-pygobject" ,python-pygobject)       ;; used in tests
       ))
    ;; TODO
    (propagated-inputs
     `(("python-mutagen" ,python-mutagen)           ;; for audio support
       ("python-pycairo" ,python-pycairo)           ;; for PDF support
       ("poppler", poppler)                         ;; for PDF support
       ("gdk-pixbuf", gdk-pixbuf)                   ;; for images support
       ("librsvg" ,librsvg)                         ;; for svg support
       ("ffmpeg" ,ffmpeg)                           ;; optional, for video support
       ("perl-image-exiftool", perl-image-exiftool) ;; for everything else
;;       ("bubblewrap", bubblewrap)                   ;; optional, for sandboxing
       ("python-pygobject" ,python-pygobject)       ;; used in tests
       ))

    ;; TODO
    ;;    (arguments
    ;;     `(#:tests? #f ))
    (arguments
     `(#:phases
       (modify-phases %standard-phases
         (add-after 'unpack 'fix-tests
           (lambda _
             (substitute* "libmat2/exiftool.py"
			  (("/usr/bin/vendor_perl/exiftool")
			   (which "exiftool")))
             ;; (substitute* "libmat2/bubblewrap.py"
	     ;; 		  (("shutil.which\\('bwrap'\\)")
	     ;; 		   (string-append "'"
	     ;; 				  (which "bwrap") ;; we have no bwrap for now
	     ;; 				  "'")))
             (substitute* "libmat2/exiftool.py"
			  (("shutil.which\\('exiftool'\\)")
			   (string-append "'"
					  (which "exiftool")
					  "'")))
             (substitute* "libmat2/video.py"
			  (("shutil.which\\('ffmpeg'\\)")
			   (string-append "'"
					  (which "ffmpeg")
					  "'")))
             (substitute* (find-files "tests" "\\.py")
			  (("^#!/usr/bin/env python3$")
			   (which "python3")))	     
             #t))
         (delete 'check)
         (add-after 'install 'check
           (lambda _
             ;; The Archlinux PKGBUILD uses that command for tests:
             (invoke "python" "-m" "unittest" "discover" "-v")
             #t)))))

    (synopsis "Metadata removal tool")
    (description
     "Metadata removal tool, supporting a wide range of commonly used file formats")
    (home-page "https://0xacab.org/jvoisin/mat2")
    (license license:gpl3+)))


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