CodeRunner compile.sh script to support Swift

compile.sh

#!/bin/bash
# This is a CodeRunner compilation script. Compilation scripts are used to
# compile code before being run using the run command specified in CodeRunner
# preferences. This script should have the following properties:
#
# Launch directory ($PWD):      Will be the same as the file being run
#
# Exit status:                  Should be 0 on success (will cause CodeRunner
#                               to continue and execute the run command)
#
# Output (stdout):              On success, one line of text which can be accessed
#                               using the $compiler variable in the run command
#
# Output (stderr):              Anything outputted here will be displayed in
#                               the CodeRunner console
#
# Arguments:                    $1      Filename of the source file
#                               $2      Encoding of the source file
#                               $3      Compilation flags set in CodeRunner preferences
#                               $4      Path of a temporary directory (without / suffix)
#
# The encoding argument may be used to specify to the compiler which encoding
# the source file uses. It will be one of the integers in the following array:

enc[4]=""       # UTF-8
enc[10]=""      # UTF-16
enc[5]=""       # ISO Latin 1
enc[9]=""       # ISO Latin 2
enc[30]=""      # Mac OS Roman
enc[12]=""      # Windows Latin 1
enc[3]=""       # Japanese (EUC)
enc[8]=""       # Japanese (Shift JIS)
enc[1]=""       # ASCII

compname=`echo "$1" | sed 's/\(.*\)\..*/\1/'`

xcrun swift -sdk $(xcrun --show-sdk-path --sdk macosx) "$1" -o "$compname" $3

status=$?
if [ $status -eq 0 ]
then
echo $compname
exit 0
elif [ $status -eq 127 ]
then
echo -e "\nTo run code in this language, you need to have compilers installed. These are bundled with Xcode 6 or later which can be downloaded through the Mac App Store or Apple's developer site."
fi
exit $status