Add evemu tool to emulate and record input device event data

[Bjørn Forsman:
 * wrap some long lines
 * tweak meta attrs (don't repeat package name, s/meta.maintainer/meta.maintainers/)
 * provide a version number (v2.0) for 'evemu' (for nix-env)
]

pkgs/tools/system/evemu/default.nix

@@ -0,0 +1,37 @@
+{ stdenv, fetchgit, automake, autoconf, libtool, pkgconfig, pythonPackages
+, libevdev, linuxHeaders
+}:
+
+stdenv.mkDerivation rec {
+  name = "evemu-${version}";
+  version = "2.0.0";
+
+  # We could have downloaded a release tarball from cgit, but it changes hash
+  # each time it is downloaded :/
+  src = fetchgit {
+    url = git://git.freedesktop.org/git/evemu;
+    rev = "refs/tags/v${version}";
+    sha256 = "1509b524a2483054a45698c485968094dd8c0f857bba7333449e9d05acbfbd2c";
+  };
+
+  buildInputs = [
+    automake autoconf libtool pkgconfig pythonPackages.python
+    pythonPackages.evdev libevdev
+  ];
+
+  preConfigure = ''
+    ./autogen.sh --prefix=$out
+  '';
+
+  postPatch = ''
+    substituteInPlace src/make-event-names.py --replace "/usr/include/linux/input.h" "${linuxHeaders}/include/linux/input.h"
+  '';
+
+  meta = with stdenv.lib; {
+    description = "Records and replays device descriptions and events to emulate input devices through the kernel's input system";
+    homepage = http://www.freedesktop.org/wiki/Evemu/;
+    repositories.git = git://git.freedesktop.org/git/evemu;
+    license = licenses.gpl2;
+    maintainer = [ maintainers.amorsillo ];
+  };
+}