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

[Ekaitz Zarraga <ekaitz@elenq.tech>]

Hi,


> > There's some kind of weird magic I'm not getting.
>
> Hello, I don't know the whole detail too, but to build a package, guix likely:
>
> -   Load and eval the package module, to get the package object. The
>     'arguments' field is a list.
> -   Convert this package object to a derivation, and write it in store as
>     a file (/gnu/store/*.drv). Where 'arguments' being part of the
>     builder, serialize as string to the file, it dosen't do complex things
>     for procedure bindings, only write their string descriptions... So
>     when the builder file is loaded, you get `Unknown object` errors.
>
>     Here, to avoid duplicating the code, you can:
>
>
> 1.  Unquote list value into `arguments`. (eg: 'asdf-substitutions' in lisp.scm)

This doesn't work for me. I don't know why.

Just moved the lambda to a (define* deactivate-sources ...) and then when I try to put the name like

(arguments `( #tests? .... ,deactivate-sources ...)

Shoots an Unknown object error. I add a diff below to let you see the whole picture of what I did and doesn't work.

> 2.  Use `(package-arguments libfreenect-examples)` with
>     `substitute-keyword-arguments` to reuse arguments, but modify
>     `configure-flags` etc. (eg: qtx11extras)
>
>     The build system can use 'imported-modules' to make a set of guile
>     modules (which can contains useful procedures, etc.) available to the
>     builder, but thas's overkill to be used here...

I'll check that option too.


Thank you for your help!


diff --git a/gnu/local.mk b/gnu/local.mk
index ab2bac9bc5..b9c09cc5e3 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -394,6 +394,7 @@ GNU_SYSTEM_MODULES =				\
   %D%/packages/nvi.scm				\
   %D%/packages/ocaml.scm			\
   %D%/packages/ocr.scm				\
+  %D%/packages/openkinect.scm			\
   %D%/packages/onc-rpc.scm			\
   %D%/packages/opencl.scm			\
   %D%/packages/openbox.scm			\
diff --git a/gnu/packages/openkinect.scm b/gnu/packages/openkinect.scm
new file mode 100644
index 0000000000..5a17acef0e
--- /dev/null
+++ b/gnu/packages/openkinect.scm
@@ -0,0 +1,127 @@
+(define-module (gnu packages openkinect)
+  #:use-module (guix packages)
+  #:use-module (guix git-download)
+  #:use-module (guix build-system cmake)
+  #:use-module ((guix licenses) #:prefix license:)
+  #:use-module (gnu packages pkg-config)
+  #:use-module (gnu packages libusb)
+  #:use-module (gnu packages python)
+  #:use-module (gnu packages python-xyz)
+  #:use-module (gnu packages gl)
+  #:use-module (gnu packages pkg-config)
+  #:use-module (gnu packages image-processing))
+
+(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
+         #:configure-flags
+         '("-DBUILD_FAKENECT=ON"
+           "-DBUILD_CPP=ON"
+           "-DBUILD_EXAMPLES=OFF" ; Available in libfreenect-examples
+           "-DBUILD_CV=OFF"       ; Available in libfreenect-cv
+           "-DBUILD_PYTHON=OFF"   ; Available in libfreenect-python
+           "-DBUILD_C_SYNC=ON")
+         #: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
+       `(("pkg-config" ,pkg-config)))
+      (inputs
+       `(("libusb" ,libusb)))
+      (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+))))
+
+(define (disable-sources)
+  (lambda* (#:key outputs #:allow-other-keys)
+           (substitute* "CMakeLists.txt"
+                        ((".*libusb.*") "")
+                        (("add_subdirectory \\(src\\)") "")
+                        ((".*libfreenectConfig.cmake.*") ""))))
+
+(define-public libfreenect-examples
+  (package
+    (inherit libfreenect)
+    (name "libfreenect-examples")
+    (inputs
+     `(("libfreenect" ,libfreenect)
+       ("glut" ,freeglut)))
+    (arguments
+     `(#:tests? #f ; Project has not tests
+       #:configure-flags '("-DBUILD_EXAMPLES=ON"
+                           "-DBUILD_FAKENECT=OFF"
+                           "-DBUILD_CPP=OFF"
+                           "-DBUILD_C_SYNC=OFF"
+                           "-DBUILD_CV=OFF")
+       #:phases
+       (modify-phases %standard-phases
+         ;; Sources are already compiled in libfreenect input
+         (add-after 'unpack 'disable-sources ,disable-sources)))) ;; UNKNOW OBJECT!
+    (synopsis "Examples for libfreenect, the Xbox Kinect device library")))
+
+(define-public libfreenect-cv
+  (package
+    (inherit libfreenect)
+    (name "libfreenect-cv")
+    (inputs
+     `(("libfreenect" ,libfreenect)
+       ("opencv" ,opencv)))
+    (arguments
+     `(#:tests? #f ; Project has not tests
+       #:configure-flags '("-DBUILD_EXAMPLES=OFF"
+                           "-DBUILD_FAKENECT=OFF"
+                           "-DBUILD_CPP=OFF"
+                           "-DBUILD_C_SYNC=OFF"
+                           "-DBUILD_CV=ON")
+       #:phases
+       (modify-phases %standard-phases
+         ;; Sources are already compiled in libfreenect input
+         (add-after 'unpack 'disable-sources ,disable-sources))))
+    (synopsis "OpenCV wrapper for libfreenect, the Xbox Kinect device
+library")))
+
+(define-public libfreenect-python
+  (package
+    (inherit libfreenect)
+    (name "libfreenect-python")
+    (native-inputs
+     `(("python-cython" ,python-cython)))
+    (inputs
+     `(("libfreenect" ,libfreenect)))
+    (propagated-inputs
+     `(("python" ,python)
+       ("python-numpy" ,python-numpy)))
+    (arguments
+     `(#:tests? #f ; Project has not tests
+       #:configure-flags '("-DBUILD_EXAMPLES=OFF"
+                           "-DBUILD_FAKENECT=OFF"
+                           "-DBUILD_CPP=OFF"
+                           "-DBUILD_C_SYNC=OFF"
+                           "-DBUILD_CV=OFF"
+                           "-DBUILD_PYTHON3=ON")
+       #:phases
+       (modify-phases %standard-phases
+         ;; Sources are already compiled in libfreenect input
+         (add-after 'unpack 'disable-sources ,disable-sources))))
+    (synopsis "Python wrapper for libfreenect, the Xbox Kinect device
+library")))