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[bug#56803,3/6] gnu: Add python-mpv.

Message ID 8dec60b4f6d340aa63e58ef1e7628d4d8801fc0b.1658946720.git.tj@schwi.pl
State Accepted
Headers show
Series Add hydrus network and its dependencies | expand

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Commit Message

Tomasz Jeneralczyk July 27, 2022, 7 p.m. UTC 
Author states that the license of the library is inherited from libmpv,
which can be either GPLv2 or LPGLv2.1. That's why the package's license is
set to be the same as mpv's.

One of the tests had to be disabled because it would neither fail or pass,
blocking all other tests from running and the package from finishing its build
process. I have no clue on why it happens.

Rarely some tests fail without any apparent reason. This is possibly related
to: https://github.com/jaseg/python-mpv/issues/209

Also add copyright.

* gnu/packages/python-xyz.scm (python-mpv): Add variable.
---
 gnu/packages/python-xyz.scm | 62 +++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)

Comments

M July 27, 2022, 10:05 p.m. UTC | #1 
On 27-07-2022 21:00, Tomasz Jeneralczyk wrote:
> +        (with-extensions (list mpv)

IIUC, that's for using Guile modules defined in packages -- but mpv is 
not a Guile package, so I expect that the surrounding with-extensions 
can be dropped.

> +     (let* ((args (package-arguments opencv)))
> +       (assoc-set! args #:configure-flags
> +                   (append (list "-DBUILD_opencv_python3=ON")
> +                           (assoc-ref args #:configure-flags)))
Look for substitute-keyword-arguments, which isn't stateful and hence 
there is less risk of accidentally modifying the arguments of the parent 
package.  Also, any reason for not adding this to the original package? 
(Possibly there is one).

> +              (replace 'check
> +                (lambda _
> +                  (setenv "DISPLAY" ":0")
> +                  (setenv "XDG_CACHE_HOME" (getcwd))
> +                  (setenv "HOME" (getcwd))
> +                  (system "Xvfb &")
> +                  (invoke "python" "test.py")))
Run "./pre-inst-env guix lint hydrus-network", it will have a remark 
about this.  Also, technically this is racy -- it's possible for python 
to start before Xvfb is ready though so far this doesn't seem to have 
caused trouble for other packages yet AFAIK -- I recommend "xvfb-run" 
"--" "python" "test.py" instead.

(I just scrolled quickly through the patches, a more full review will 
have to come later.)

Greetings,
Maxime.
M July 27, 2022, 10:09 p.m. UTC | #2 
On 27-07-2022 21:00, Tomasz Jeneralczyk wrote:
> One of the tests had to be disabled because it would neither fail or pass,
> blocking all other tests from running and the package from finishing its build
> process. I have no clue on why it happens.

This sounds like something upstream should be informed about, otherwise 
they wouldn't know there is something to fix.

Greetings,
Maxime
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Patch

diff --git a/gnu/packages/python-xyz.scm b/gnu/packages/python-xyz.scm
index ac7c0d6066..5bc40ecaea 100644
--- a/gnu/packages/python-xyz.scm
+++ b/gnu/packages/python-xyz.scm
@@ -124,6 +124,7 @@ 
 ;;; Copyright © 2022 Artyom V. Poptsov <poptsov.artyom@gmail.com>
 ;;; Copyright © 2022 Paul A. Patience <paul@apatience.com>
 ;;; Copyright © 2022 Jean-Pierre De Jesus DIAZ <me@jeandudey.tech>
+;;; Copyright © 2022 Tomasz Jeneralczyk <tj@schwi.pl>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -30203,3 +30204,64 @@  (define-public python-bsdiff4
 binary diff utility.  It also provides two command-line tools, @code{bsdiff4}
 and @code{bspatch4}.")
     (license license:bsd-2)))
+
+(define-public python-mpv
+  (package
+    (name "python-mpv")
+    (version "v1.0.1")
+    (source
+     (origin
+       ;; python-mpv from pypi does not include the tests directory.
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/jaseg/python-mpv")
+             (commit version)))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32
+         "10w6j3n62ap45sf6q487kz8z6g58sha37i14fa2hhng794z7a8jh"))
+       (modules '((guix build utils)))
+       (snippet
+        (with-extensions (list mpv)
+          #~(begin
+              ;; Without an absolute path it is not able find and
+              ;; load the libmpv library.
+              (substitute* "mpv.py"
+                (("(sofile = )(.*)" _ pre post)
+                 (string-append pre "\"" #$mpv "/lib/\" + " post)))
+              ;; One of the tests never completes, so neutering it using
+              ;; early return allows other test to run without issue.
+              (substitute* "tests/test_mpv.py"
+                ;; Note the typo in "prooperty" - this was fixed later in
+                ;; upstream but has no effect on whether the tests hangs or not.
+                (("test_wait_for_prooperty_event_overflow.*" line)
+                 ;; The long whitespace between \n and return is to match the
+                 ;; identation level, which is significant in python.
+                 (string-append line "\n        return\n"))))))))
+    (build-system python-build-system)
+    (arguments
+     (list #:phases
+           (with-imported-modules '((guix build utils))
+             #~(modify-phases %standard-phases
+                 (add-before 'check 'prepare-for-tests
+                   (lambda _
+                     ;; Fontconfig throws errors when it has no cache dir to use.
+                     (setenv "XDG_CACHE_HOME" (getcwd))
+                     ;; Some tests fail without a writable and readable HOME.
+                     (setenv "HOME" (getcwd))))))))
+    (native-inputs
+     (list python-xvfbwrapper)) ; needed for tests only
+    (inputs (list mpv))
+    (propagated-inputs (list python-pillow)) ; for raw screenshots
+    (home-page "https://github.com/jaseg/python-mpv")
+    (synopsis "Python interface to the mpv media player")
+    (description
+     "python-mpv is a ctypes-based python interface to the mpv media player.
+It gives you more or less full control of all features of the player, just
+as the lua interface does.")
+    ;; From the project's README:
+    ;;  python-mpv inherits the underlying libmpv's license, which can be either
+    ;;  GPLv2 or later (default) or LGPLv2.1 or later. For details, see the mpv
+    ;;  copyright page.
+    (license (package-license mpv))))
+