Patch for play and framework/build to run under cygwin and mingw32. Updated for play-2.1.3.

play_cygwin.patch

diff -r --unified play-2.1.3/framework/build play-2.1.3-cygwin/framework/build
--- play-2.1.3/framework/build   2013-08-06 12:29:56 +0000
+++ play-2.1.3-cygwin/framework/build	2013-09-04 13:44:05 +0000
@@ -10,4 +10,4 @@
   DEBUG_PARAM="-Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=${JPDA_PORT}"
 fi
 
-java ${DEBUG_PARAM} -Xms512M -Xmx1536M -Xss1M -XX:+CMSClassUnloadingEnabled -XX:MaxPermSize=384M ${JAVA_OPTS} -Dfile.encoding=UTF-8 -Dplay.version="${PLAY_VERSION}" -Dsbt.ivy.home=`dirname $0`/../repository -Dplay.home=`dirname $0` -Dsbt.boot.properties=`dirname $0`/sbt/sbt.boot.properties -jar `dirname $0`/sbt/sbt-launch.jar "$@"
+java ${DEBUG_PARAM} -Xms512M -Xmx1536M -Xss1M -XX:+CMSClassUnloadingEnabled -XX:MaxPermSize=384M ${JAVA_OPTS} -Dfile.encoding=UTF-8 -Dplay.version="${PLAY_VERSION}" -Dsbt.ivy.home=`dirname $0`/../repository -Dplay.home=`dirname $0` -Dsbt.boot.properties=$BOOTPROP`dirname $0`/sbt/sbt.boot.properties -jar `dirname $0`/sbt/sbt-launch.jar "$@"
diff -r --unified play-2.1.3/play play-2.1.3-cygwin/play
--- play-2.1.3/play	2013-09-04 02:44:05 +0000
+++ play-2.1.3-cygwin/play	2013-09-04 13:51:36 +0000
@@ -1,5 +1,23 @@
 #! /usr/bin/env sh
 
+case `uname` in
+  CYGWIN*)
+    function dirname {
+      cygpath -m `command dirname $@`
+    }
+    typeset -fx dirname
+    export BOOTPROP="file:///"
+    ;;
+  MINGW32*)
+    function dirname { (cd `command dirname $@`; pwd -W) }
+    typeset -fx dirname
+    export BOOTPROP="file:///"
+    ;;
+  *)
+    export BOOTPROP=""
+    ;;
+esac
+
 PRG="$0"
 while [ -h "$PRG" ] ; do
   PRG=`readlink "$PRG"`
@@ -61,5 +79,5 @@
   fi
   
 else
-  "$JAVA" -Dsbt.ivy.home=$dir/repository -Dplay.home=$dir/framework -Dsbt.boot.properties=$dir/framework/sbt/play.boot.properties -jar $dir/framework/sbt/sbt-launch.jar "$@"
+  "$JAVA" -Dsbt.ivy.home=$dir/repository -Dplay.home=$dir/framework -Dsbt.boot.properties=$BOOTPROP$dir/framework/sbt/play.boot.properties -jar $dir/framework/sbt/sbt-launch.jar "$@"
 fi

1. start mingw32
   
2. cd /path/to/play-2.1.3
3. patch -p1 < /path/to/play_cygwin.patch