hive: set HIVE_HOME in wrapper script

Updated java version and wrapper generation code for hive

Formula/hive.rb

@@ -6,25 +6,25 @@ class Hive < Formula
 
   bottle :unneeded
 
+  depends_on :java => "1.7+"
   depends_on "hadoop"
-  depends_on :java
 
   def install
     rm_f Dir["bin/*.cmd", "bin/ext/*.cmd", "bin/ext/util/*.cmd"]
     libexec.install %w[bin conf examples hcatalog lib scripts]
-    bin.write_exec_script Dir["#{libexec}/bin/*"]
+
+    Pathname.glob("#{libexec}/bin/*") do |file|
+      next if file.directory?
+      (bin/file.basename).write_env_script file,
+        Language::Java.java_home_env("1.7+").merge(:HIVE_HOME => libexec)
+    end
   end
 
   def caveats; <<-EOS.undent
     Hadoop must be in your path for hive executable to work.
-    After installation, set $HIVE_HOME in your profile:
-      export HIVE_HOME=#{libexec}
 
     If you want to use HCatalog with Pig, set $HCAT_HOME in your profile:
       export HCAT_HOME=#{libexec}/hcatalog
-
-    You may need to set JAVA_HOME:
-      export JAVA_HOME="$(/usr/libexec/java_home)"
     EOS
   end