Add a binary distribution of ZXing 1D/2D code library

pkgs/tools/graphics/zxing/default.nix

···
+{stdenv, fetchurl, openjre, jre ? openjre}:
+stdenv.mkDerivation rec {
+  name = "zxing-${version}";
+  version = "3.1.0";
+  # Maven builds are hard to get right
+  core_jar = fetchurl {
+    url = "http://repo1.maven.org/maven2/com/google/zxing/core/${version}/core-${version}.jar";
+    sha256 = "199l4xvlcpafqn69r3k9qjpqkw9lvkl02hzpm0ackvdhl7vk42zh";
+  };
+  javase_jar = fetchurl {
+    url = "http://repo1.maven.org/maven2/com/google/zxing/javase/${version}/javase-${version}.jar";
+    sha256 = "0fzxvvf5dqyrs5m9rqw4ffm9h1s27bi7q3jb1dam34s80q2rp2zq";
+  };
+  inherit jre;
+  unpackPhase = ''true'';
+  installPhase = ''
+    mkdir -p "$out/lib/java" "$out/bin"
+    cp "${core_jar}" "${javase_jar}" "$out/lib/java"
+    substituteAll "${./java-zxing.sh}" "$out/bin/java-zxing"
+    substituteAll "${./zxing-cmdline-runner.sh}" "$out/bin/zxing-cmdline-runner"
+    substituteAll "${./zxing-cmdline-encoder.sh}" "$out/bin/zxing-cmdline-encoder"
+    substituteAll "${./zxing.sh}" "$out/bin/zxing"
+    chmod a+x "$out/bin"/*
+    cd "$out/lib/java"; for i in *.jar; do mv "$i" "''${i#*-}"; done
+  '';
+  meta = {
+    inherit version;
+    description = ''1D and 2D code reading library'';
+    license = stdenv.lib.licenses.asl20;
+    maintainers = [stdenv.lib.maintainers.raskin];
+    platforms = stdenv.lib.platforms.linux;
+    homepage = "https://github.com/zxing/zxing";
+  };
+}

pkgs/tools/graphics/zxing/java-zxing.sh

···
+#! /bin/sh
+
+@jre@/bin/java -cp @out@/lib/java/core-@version@.jar:@out@/lib/java/javase-@version@.jar "$@"

pkgs/tools/graphics/zxing/zxing-cmdline-encoder.sh

···
+#! /bin/sh
+
+java-zxing com.google.zxing.client.j2se.CommandLineEncoder "$@"

pkgs/tools/graphics/zxing/zxing-cmdline-runner.sh

···
+#! /bin/sh
+
+java-zxing com.google.zxing.client.j2se.CommandLineRunner "$@"

pkgs/tools/graphics/zxing/zxing.sh

···
+#! /bin/sh
+choice="$1";
+shift
+case "$choice" in
+	encode | create | write | CommandLineEncoder)
+		zxing-cmdline-encoder "$@";
+		;;
+	decode | read | run | CommandLineRunner)
+		zxing-cmdline-runner "$@";
+		;;
+esac

pkgs/top-level/all-packages.nix

···
 
   zsync = callPackage ../tools/compression/zsync { };
 
+  zxing = callPackage ../tools/graphics/zxing {};
+
 
   ### SHELLS