gnu: clementine: Remove Spotify downloader.

Clementine has a button in the preference menu that allows downloading a
binary blob to add support for Spofify.  Let's remove this button.  It turns
out this is the only part of the code base that uses crypto++, let's remove
this dependency too.

* gnu/packages/music.scm (clementine)[arguments]: Remove crypto++ support. Set
HAVE_SPOTIFY_DOWNLOADER to FALSE.
[inputs]: Remove crypto++ input.
* gnu/packages/patches/clementine-remove-crypto++-dependency.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.

Signed-off-by: Leo Famulari <leo@famulari.name>

gnu/local.mk

@@ -580,6 +580,7 @@ dist_patch_DATA =						\
   %D%/packages/patches/chmlib-inttypes.patch			\
   %D%/packages/patches/clang-libc-search-path.patch		\
   %D%/packages/patches/clang-3.8-libc-search-path.patch		\
+  %D%/packages/patches/clementine-remove-crypto++-dependency.patch	\
   %D%/packages/patches/clementine-use-openssl.patch		\
   %D%/packages/patches/clisp-remove-failing-test.patch		\
   %D%/packages/patches/clucene-pkgconfig.patch			\

gnu/packages/music.scm

@@ -226,18 +226,19 @@ score, keyboard, guitar, drum and controller views.")
                        "sha2" ;; Replaced by openssl.
                        "taglib"
                        "tinysvcmdns")))
-                (patches (search-patches "clementine-use-openssl.patch"))))
+                (patches (search-patches "clementine-use-openssl.patch"
+                                         "clementine-remove-crypto++-dependency.patch"))))
       (build-system cmake-build-system)
       (arguments
        '(#:test-target "clementine_test"
          #:configure-flags
-         (let ((crypto (assoc-ref %build-inputs "crypto++")))
-           (list "-DENABLE_VISUALISATIONS=OFF" ; requires unpackaged "projectm"
-                 "-DCRYPTOPP_FOUND=TRUE"
-                 (string-append "-DCRYPTOPP_INCLUDE_DIRS=" crypto "/include")
-                 (string-append "-DCRYPTOPP_LIBRARY_DIRS=" crypto "/lib")
-                 (string-append "-DCRYPTOPP_LIBRARIES=" crypto "/lib/libcryptopp.a")
-                 "-DUSE_SYSTEM_SHA2=TRUE"))
+         (list ;; Requires unpackaged "projectm"
+               "-DENABLE_VISUALISATIONS=OFF"
+               ;; Otherwise it may try to download a non-free library at run-time.
+               ;; TODO In an origin snippet, remove the code that performs the
+               ;; download.
+               "-DHAVE_SPOTIFY_DOWNLOADER=FALSE"
+               "-DUSE_SYSTEM_SHA2=TRUE")
          #:phases
          (modify-phases %standard-phases
            (add-after 'install 'wrap-program
@@ -254,7 +255,6 @@ score, keyboard, guitar, drum and controller views.")
       (inputs
        `(("boost" ,boost)
          ("chromaprint" ,chromaprint)
-         ("crypto++" ,crypto++)
          ("fftw" ,fftw)
          ("glib" ,glib)
          ("glu" ,glu)

gnu/packages/patches/clementine-remove-crypto++-dependency.patch

@@ -0,0 +1,19 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 3202b8b..473ecb9 100755
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -279,14 +279,6 @@ optional_component(LIBPULSE ON "Pulse audio integration"
+ 
+ optional_component(VISUALISATIONS ON "Visualisations")
+ 
+-if(NOT HAVE_SPOTIFY_BLOB AND NOT CRYPTOPP_FOUND)
+-  message(FATAL_ERROR "Either crypto++ must be available or the non-GPL Spotify "
+-          "code must be compiled in")
+-elseif(CRYPTOPP_FOUND)
+-  set(HAVE_CRYPTOPP ON)
+-  set(HAVE_SPOTIFY_DOWNLOADER ON)
+-endif()
+-
+ # Find DBus if it's enabled
+ if (HAVE_DBUS)
+   find_package(Qt5 COMPONENTS DBus)