Add the tewi font

lib/maintainers.nix

···
   fluffynukeit = "Daniel Austin <[e-mail]>";
   forkk = "Andrew Okin <[e-mail]>";
   fpletz = "Franz Pletz <[e-mail]>";
+  fro_ozen = "fro_ozen <[e-mail]>";
   ftrvxmtrx = "Siarhei Zirukin <[e-mail]>";
   funfunctor = "Edward O'Callaghan <[e-mail]>";
   fuuzetsu = "Mateusz Kowalczyk <[e-mail]>";

pkgs/data/fonts/tewi/default.nix

···
+{stdenv, fetchgit, bdftopcf, mkfontdir, mkfontscale}:
+
+stdenv.mkDerivation rec {
+  date = "2015-06-07";
+  name = "tewi-font-${date}";
+
+  src = fetchgit {
+    url = "https://github.com/lucy/tewi-font";
+    rev = "ff930e66ae471da4fdc226ffe65fd1ccd13d4a69";
+    sha256 = "d641b911cc2132a00c311e3d978c1ca454b0fb3bc3ff4b4742b9f765b765a94b";
+  };
+
+  buildInputs = [ bdftopcf mkfontdir mkfontscale ];
+  buildPhase = ''
+    for i in *.bdf; do
+        bdftopcf -o ''${i/bdf/pcf} $i
+    done
+
+    gzip *.pcf
+  '';
+
+  installPhase = ''
+    fontDir="$out/share/fonts/misc"
+    mkdir -p "$fontDir"
+    mv *.pcf.gz "$fontDir"
+
+    cd "$fontDir"
+    mkfontdir
+    mkfontscale
+  '';
+
+  meta = with stdenv.lib; {
+    description = "A nice bitmap font, readable even at small sizes";
+    longDescription = ''
+      Tewi is a bitmap font, readable even at very small font sizes. This is
+      particularily useful while programming, to fit a lot of code on your
+      screen.
+    '';
+    homepage = "https://github.com/lucy/tewi-font";
+    license = {
+      fullName = "GNU General Public License with a font exception";
+      url = "https://www.gnu.org/licenses/gpl-faq.html#FontException";
+    };
+    maintainers = [ maintainers.fro_ozen ];
+    platforms = platforms.unix;
+  };
+}

pkgs/top-level/all-packages.nix

···
 
   tetex = callPackage ../tools/typesetting/tex/tetex { libpng = libpng12; };
 
+  tewi-font = callPackage ../data/fonts/tewi  {};
+
   tex4ht = callPackage ../tools/typesetting/tex/tex4ht { };
 
   texFunctions = import ../tools/typesetting/tex/nix pkgs;