[bug#41294] [PATCH] gnu: Add libfreenect.

[Ekaitz Zarraga <ekaitz@elenq.tech>]

Hi,

Adding libfreenect as discussed here:

https://issues.guix.gnu.org/40492

I have some doubts with this package:

- It has some extra flags that can be set in the configure step to build some python bindings. I didn't set them because they also require a python interpreter. How is the best way to handle that? Make another package with the flags set? Activate them by default? Leave them as I did?

- The package is 300 megs checking `guix size` that's because it has some testing binaries that have extra dependencies. If only the library is compiled it doesn't depend on GLUT and that reduces the size a lot. I tried to separate the package's outputs but I don't know how to do it correctly (I checked the docs but it doesn't go in detail). I'd like to do it but I need some help.

- I'm not sure if the file where I added it is a good choice.

Best,

Ekaitz

---

From aa74e0b4872f6a2748ed919ebe3c265472d04664 Mon Sep 17 00:00:00 2001
From: Ekaitz Zarraga <ekaitz@elenq.tech>
Date: Fri, 15 May 2020 23:22:04 +0200
Subject: [PATCH] gnu: Add libfreenect.

    * gnu/packages/libusb (libfreenect): New variable.
---
 gnu/packages/libusb.scm | 39 ++++++++++++++++++++++++++++++++++++++-
 1 file changed, 38 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/libusb.scm b/gnu/packages/libusb.scm
index 3842f3fead..a27373c15a 100644
--- a/gnu/packages/libusb.scm
+++ b/gnu/packages/libusb.scm
@@ -10,6 +10,7 @@
 ;;; Copyright © 2018 Vagrant Cascadian <vagrant@debian.org>
 ;;; Copyright © 2020 Marius Bakke <mbakke@fastmail.com>
 ;;; Copyright © 2020 Christopher Howard <christopher@librehacker.com>
+;;; Copyright © 2020 Ekaitz Zarraga <ekaitz@elenq.tech>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -48,7 +49,8 @@
   #:use-module (gnu packages python)
   #:use-module (gnu packages python-xyz)
   #:use-module (gnu packages tls)
-  #:use-module (gnu packages xiph))
+  #:use-module (gnu packages xiph)
+  #:use-module (gnu packages gl))

 (define-public libusb
   (package
@@ -679,3 +681,38 @@ HID-Class devices.")

 (define-public python2-hidapi
   (package-with-python2 python-hidapi))
+
+(define-public libfreenect
+  (let ((version "0.6.1"))
+    (package
+      (name "libfreenect")
+      (version version)
+      (source (origin
+                (method git-fetch)
+                (uri (git-reference
+                      (url "https://github.com/OpenKinect/libfreenect")
+                      (commit (string-append "v" version))))
+                (sha256
+                 (base32 "0was1va167rqshmpn382h36yyprpfi9cwillb6ylppmnfdrfrhrr"))))
+      (build-system cmake-build-system)
+      (arguments
+       `(#:tests? #f ;; Project has not tests
+         #:phases
+         (modify-phases %standard-phases
+           (add-after 'install 'install-udev-rules
+             (lambda* (#:key outputs #:allow-other-keys)
+               (let* ((out (assoc-ref outputs "out"))
+                      (rules-out (string-append out "/lib/udev/rules.d")))
+                 (install-file "../source/platform/linux/udev/51-kinect.rules"
+                               (string-append rules-out "51-kinect.rules"))
+                 #t))))))
+      (native-inputs
+       `(("libusb" ,libusb)
+         ("pkg-config" ,pkg-config)))
+      (inputs
+       `(("glut" ,freeglut)))
+      (synopsis "Drivers and libraries for the Xbox Kinect device")
+      (description "libfreenect is a userspace driver for the Microsoft Kinect.
+It supports: RGB and Depth Images, Motors, Accelerometer, LED and Audio.")
+      (home-page "https://openkinect.org/")
+      (license license:gpl2+))))
--
2.26.1