gnu: Deprecate python-waf.

* gnu/packages/build-tools.scm (waf): New variable, based on python-waf.
[synopsis]: Improve it, remove mentioning of Python to reduce confusion
level that it's just to build Python projects.
[description]: Improve it, remove mentioning of Python, add a list
features from the project's README.
(python-waf): Deprecate variable in favor of waf

* gnu/packages/audio.scm (lvtk-1,ttl2c)[native-inputs]: Remove
python-waf; add waf.
* gnu/packages/fltk.scm (ntk): Likewise.
* gnu/packages/music.scm (non-sequencer, non-sequencer-manager,
non-mixer, non-timeline): Likewise.
* gnu/packages/ntp.scm (ntpsec): Likewise.
* gnu/packages/wxwidgets.scm (python-wxpython): Likewise.

Change-Id: I88686c20e1de8f60a4a6c9bd70fdafe8fe4f0b93

gnu/packages/audio.scm

@@ -3922,10 +3922,10 @@ software.")
       `(modify-phases %standard-phases
          (add-before 'configure 'setup-waf
            (lambda* (#:key inputs #:allow-other-keys)
-             (let ((waf (assoc-ref inputs "python-waf")))
+             (let ((waf (assoc-ref inputs "waf")))
                (copy-file (string-append waf "/bin/waf") "waf")))))))
     (inputs (list boost))
-    (native-inputs (list python-waf))
+    (native-inputs (list waf))
     (home-page "https://github.com/lvtk/ttl2c")
     (synopsis "Turtle to C header conversion utility for LV2 plugins")
     (description
@@ -4033,10 +4033,10 @@ lv2-c++-tools.")
         `(modify-phases %standard-phases
            (add-before 'configure 'setup-waf
              (lambda* (#:key inputs #:allow-other-keys)
-               (let ((waf (assoc-ref inputs "python-waf")))
+               (let ((waf (assoc-ref inputs "waf")))
                  (copy-file (string-append waf "/bin/waf") "waf")))))))
       (inputs (list boost gtkmm-2 lv2))
-      (native-inputs (list pkg-config python-waf))
+      (native-inputs (list pkg-config waf))
       (home-page "https://github.com/lvtk/lvtk")
       (synopsis "C++ libraries for LV2 plugins")
       (description

gnu/packages/build-tools.scm

@@ -1239,9 +1239,9 @@ the POSIX make utility and allows writing a build script in Guile
 Scheme.")
       (license license:expat))))
 
-(define-public python-waf
+(define-public waf
   (package
-    (name "python-waf")
+    (name "waf")
     (version "2.0.19") ;TODO: newer version brakes API
     (source
      (origin
@@ -1270,8 +1270,33 @@ Scheme.")
           ;; waf breaks when it is wrapped.
           (delete 'wrap))))
     (home-page "https://waf.io/")
-    (synopsis "Python-based build system")
+    (synopsis "Multi-level general purpose build system")
     (description
-     "Waf is a Python-based framework for configuring, compiling and
-installing applications.")
+     "Waf is a build system framework for configuring, compiling and
+installing applications.
+
+Features:
+@itemize
+@item Automatic build order: the build order is computed from input and output
+files, among others
+@item Automatic dependencies: tasks to execute are detected by hashing files
+and commands
+@item Performance: tasks are executed in parallel automatically, the startup
+time is meant to be fast (separation between configuration and build)
+@item Flexibility: new commands and tasks can be added very easily through
+subclassing, bottlenecks for specific builds can be eliminated through dynamic
+method replacement
+@item Extensibility: though many programming languages and compilers are
+already supported by default, many others are available as extensions
+@item IDE support: Eclipse, Visual Studio and Xcode project generators
+(waflib/extras/)
+@item Documentation: the application is based on a robust model documented in
+The Waf Book and in the API docs
+@item Python compatibility: cPython 2.7 to 3.x, Jython 2.7 and PyPy
+@end itemize")
     (license license:bsd-3)))
+
+;; waf is the final program no need to prefix it with "python-", the same way
+;; as meson or ninja which are written in Python as well.
+(define-public python-waf
+  (deprecated-package "python-waf" waf))

gnu/packages/fltk.scm

@@ -148,7 +148,7 @@ UI builder called FLUID that can be used to create applications in minutes.")
     (inputs
      `(("libjpeg" ,libjpeg-turbo)
        ("glu" ,glu)
-       ("waf" ,python-waf)))
+       ("waf" ,waf)))
     ;; ntk.pc lists "x11" and "xft" in Requires.private, and "cairo" in
     ;; Requires.
     (propagated-inputs

gnu/packages/music.scm

@@ -1855,12 +1855,12 @@ music theorist Paul Nauert's quantization grids or Q-Grids, for short.")
          (modify-phases %standard-phases
            (add-before 'configure 'setup-waf
              (lambda* (#:key inputs #:allow-other-keys)
-               (let ((waf (assoc-ref inputs "python-waf")))
+               (let ((waf (assoc-ref inputs "waf")))
                  (copy-file (string-append waf "/bin/waf") "waf")))))))
       (inputs
        (list jack-1 libsigc++-2 liblo ntk))
       (native-inputs
-       (list python-waf pkg-config))
+       (list waf pkg-config))
       (home-page "https://non.tuxfamily.org/wiki/Non%20Sequencer")
       (synopsis "Pattern-based MIDI sequencer")
       (description
@@ -1907,7 +1907,7 @@ session can be interrupted and easily resumed at a later time.")
     (inputs
      (list jack-1 liblo ntk))
     (native-inputs
-     (list python-waf pkg-config))
+     (list waf pkg-config))
     (home-page "https://non.tuxfamily.org/nsm/")
     (synopsis "Audio session management")
     (description
@@ -1928,7 +1928,7 @@ communicate with the session management daemon.")
     (inputs
      (list jack-1 liblo ladspa lrdf ntk lv2 lilv))
     (native-inputs
-     (list python-waf pkg-config))
+     (list waf pkg-config))
     (home-page "https://non.tuxfamily.org/wiki/Non%20Mixer")
     (synopsis "Modular digital audio mixer")
     (description
@@ -1950,7 +1950,7 @@ studio.")
     (inputs
      (list jack-1 liblo libsndfile ntk))
     (native-inputs
-     (list python-waf pkg-config))
+     (list waf pkg-config))
     (home-page "https://non.tuxfamily.org/wiki/Non%20Timeline")
     (synopsis "Modular digital audio timeline arranger")
     (description

gnu/packages/ntp.scm

@@ -250,7 +250,7 @@ computers over a network.")
                          m4
                          pkg-config
                          pps-tools
-                         python-waf
+                         waf
                          ruby-asciidoctor/minimal))
     (inputs (cons* gpsd openssl
                    ;; Build with POSIX capabilities and syscall filtering

gnu/packages/wxwidgets.scm

@@ -358,7 +358,7 @@ except ImportError:
     (inputs
      (list gtk+ wxwidgets))
     (native-inputs
-     (list pkg-config python-setuptools python-waf))
+     (list pkg-config python-setuptools waf))
     (propagated-inputs
      (list python-numpy python-pillow python-six))
     (home-page "https://wxpython.org/")