leiningen: Simplify build.

pkgs/development/tools/build-managers/leiningen/builder.sh

···
-#!/bin/bash
-
-source $stdenv/setup
-
-mkdir -pv $out/bin $out/share/java
-
-out_bin=$out/bin/lein
-
-cp -v $src $out_bin
-cp -v $jarsrc "$out/share/java/$name-standalone.jar"
-
-for p in $patches;
-do
-    patch --verbose $out_bin -p0 < $p
-done
-chmod -v 755 $out_bin
-
-patchShebangs $out
-
-wrapProgram $out_bin \
-    --prefix PATH ":" "${stdenv.lib.makeBinPath [ rlwrap coreutils findutils ]}" \
-    --set LEIN_GPG ${gnupg1compat}/bin/gpg \
-    --set JAVA_CMD ${jdk}/bin/java

pkgs/development/tools/build-managers/leiningen/default.nix

···
 { stdenv, fetchurl, makeWrapper
-, coreutils, findutils, jdk, rlwrap, gnupg1compat }:
+, coreutils, jdk, rlwrap, gnupg1compat }:
 
 stdenv.mkDerivation rec {
   pname = "leiningen";
···
     sha256 = "1533msarx6gb3xc2sp2nmspllnqy7anpnv9a0ifl0psxm3xph06p";
   };
 
-  patches = [ ./lein-fix-jar-path.patch ];
+  JARNAME = "${name}-standalone.jar";
+
+  unpackPhase = "true";
+
+  buildInputs = [ makeWrapper ];
+  propagatedBuildInputs = [ jdk ];
+
+  installPhase = ''
+    mkdir -p $out/bin $out/share/java
 
-  inherit rlwrap gnupg1compat findutils coreutils jdk;
+    cp -v $src $out/bin/lein
+    cp -v $jarsrc $out/share/java/$JARNAME
+  '';
 
-  builder = ./builder.sh;
+  fixupPhase = ''
+    chmod +x $out/bin/lein
+    patchShebangs $out/bin/lein
 
-  buildInputs = [ makeWrapper ];
+    substituteInPlace $out/bin/lein \
+      --replace 'LEIN_JAR=/usr/share/java/leiningen-$LEIN_VERSION-standalone.jar' "LEIN_JAR=$out/share/java/$JARNAME"
 
-  propagatedBuildInputs = [ jdk ];
+    wrapProgram $out/bin/lein \
+      --prefix PATH ":" "${stdenv.lib.makeBinPath [ rlwrap coreutils ]}" \
+      --set LEIN_GPG ${gnupg1compat}/bin/gpg \
+      --set JAVA_CMD ${jdk}/bin/java
+  '';
 
   meta = {
     homepage = http://leiningen.org/;

pkgs/development/tools/build-managers/leiningen/lein-fix-jar-path.patch

···
-46c47
-< LEIN_JAR=/usr/share/java/leiningen-$LEIN_VERSION-standalone.jar
----
-> LEIN_JAR=$(find $(dirname $0)/../share/java -name *-standalone.jar | head -n 1)