Add Fira font.

Fira is the font for FirefoxOS.

- https://github.com/mozilla/Fira
- http://www.carrois.com/fira-3-1/

pkgs/data/fonts/fira/default.nix

@@ -0,0 +1,36 @@
+{stdenv, fetchurl, unzip }:
+
+stdenv.mkDerivation rec {
+  name = "fira-3.111";
+
+  src = fetchurl {
+    url = "http://www.carrois.com/wordpress/downloads/fira_3_1/FiraFonts3111.zip";
+    sha256 = "3ced3df236b0b0eec1b390885c53ac02f3e3f830e9449414230717334a0b2457";
+  };
+
+  buildInputs = [unzip];
+  phases = [ "unpackPhase" "installPhase" ];
+
+  installPhase = ''
+    mkdir -p $out/share/fonts/opentype
+    find . -name "*.otf" -exec cp -v {} $out/share/fonts/opentype \;
+  '';
+
+  meta = with stdenv.lib; {
+    homepage = http://www.carrois.com/fira-3-1/;
+    description = "Sans-serif and monospace font for Firefox OS";
+    longDescription = ''
+      Fira Sans is a sans-serif font designed by Erik Spiekermann,
+      Ralph du Carrois, Anja Meiners and Botio Nikoltchev of Carrois
+      Type Design for Mozilla Firefox OS.  It is closely related to
+      Spiekermann's FF Meta typeface.  Available in Two, Four, Eight,
+      Hair, Thin, Ultra Light, Extra Light, Light, Book, Regular,
+      Medium, Semi Bold, Bold, Extra Bold, Heavy weights with
+      corresponding italic versions.  Fira Mono is a matching
+      monospace variant of Fira Sans.  It is available in regular, and
+      bold weights.
+    '';
+    license = licenses.ofl;
+    platforms = platforms.all;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -8024,6 +8024,8 @@ let
 
   eb-garamond = callPackage ../data/fonts/eb-garamond { };
 
+  fira = callPackage ../data/fonts/fira { };
+
   freefont_ttf = callPackage ../data/fonts/freefont-ttf { };
 
   freepats = callPackage ../data/misc/freepats { };