#! /bin/bash
#
# this script runs uncrustify on a given file or dir of files using the OF style config file
#
# the style file was created using Universal Indent GUI following the OF coding guidelines:
# https://github.com/openframeworks/openFrameworks/wiki/oF-code-style
#
# 2012 Dan Wilcox <danomatika@gmail.com> for openFrameworks
#
# adapted from the call_Uncrustify.sh script generated by Universal Indent GUI
#

# exit this script on an error
#set -e

# the uncrustify style file
OF_CONFIG_FILE=openFrameworks_style.cfg

# the config file to use
CONFIG_FILE=$OF_CONFIG_FILE

# a temp config file for adding options
TEMP_CONFIG=""

# the header file to use
HEADER=""

# comment this for debug output
QUIET=-q

# usage text
HELP="
 Usage: ofStyler [options] file/dir [filesuffix]
     ofStyler filename
     ofStyler dirname filesuffix

 Format a source code file or directory of files according
 to the OF style guidelines using uncrustify.

 Options:
 -v   print uncrustify log messages (for debugging)
 -a   add a comment header to files,
      does not overwrite existing header
 -h   this usage guide
 
 Example:
     ofStyler ../../../libs/openFrameworks cpp
     ofStyler myFile.cpp
     ofStyle -a example_header_template.txt myHeaderlessFile.h
"

#### BEGIN commandline parsing
# from http://stackoverflow.com/questions/402377/using-getopts-in-bash-shell-script-to-get-long-and-short-command-line-options

# We need TEMP as the `eval set --' would nuke the return value of getopt.
TEMP=`getopt hva: "$@"`

if [ $? != 0 ] ; then echo "$HELP" >&2 ; exit 1 ; fi

# Note the quotes around `$TEMP': they are essential!
eval set -- "$TEMP"

while true ; do
	case "$1" in
		-v|--verbose)	# set verbosity
			QUIET="" ;  shift 2 ;;
		-a|--add-header) # add a header
			HEADER="$2" ; shift 2 ;;
		-h|--help)	# print help and exit
			echo "$HELP"; exit 0 ;;
		--) shift ; break ;;	# do nothing
		*) break ;;
	esac
done

# check commandline
if [ "$1" == "" ] ; then
	echo "$HELP"
	exit 1
fi

#### Functions

# does a command exist?
# returns bool
function commandExists() {
	hash "$1" 2>&-
}

# create a temp config with a given header to add
function createConfigWithHeader() {
	TEMP_CONFIG=$SCRIPT_DIR/config_with_header.cfg
	
	# load tmp cfg with current cfg values
	cat $CONFIG_FILE > $TEMP_CONFIG
	
	# append uncrustify header file option
	echo "cmt_insert_file_header=$HEADER" >> $TEMP_CONFIG
	
	# use temp script
	CONFIG_FILE=$TEMP_CONFIG
}

#### Run

# is uncrustify installed?
if ! commandExists uncrustify ; then
	echo
	echo "ERROR: uncrustify source code formatter not found!"
	echo
	echo "please install uncrustify: http://uncrustify.sourceforge.net/"
	echo "  Mac OSX:"
	echo "    homebrew: brew install uncrustify"
	echo "    macports: sudo port install uncrustify"
	echo "  Ubuntu:"
	echo "    sudo apt-get install uncrustify"
	echo "  Windows:"
	echo "    http://sourceforge.net/projects/uncrustify/files/uncrustify/"
	echo
	exit 1
fi

# get the current working dir
SCRIPT_DIR=$(dirname $0)

# are we adding a header?
if [ "$HEADER" != "" ] ; then

	# does the given file exist?
	if [ ! -e $HEADER ] ; then
		echo "ERROR: header $HEADER could not be found"
		exit 1
	fi
	
	# create a temp config file
	createConfigWithHeader
fi

# recurse through a dir
if [ -d "$1" ]; then
	
	#echo "Dir ${1} exists"
	
	if [ -n "$2" ]; then
		filesuffix=$2
	else
		filesuffix="*"
	fi

	#echo "Filtering files using suffix ${filesuffix}"

	file_list=`find ${1} -name "*.${filesuffix}" -type f`
	for file2indent in $file_list; do 
		echo "Styling file $file2indent"
		uncrustify $QUIET "$file2indent" -c $SCRIPT_DIR/$CONFIG_FILE --no-backup
	done

else
	
	# style a single given file
	if [ -f "$1" ]; then
		echo "Styling file $1"
		uncrustify $QUIET "$1" -c $SCRIPT_DIR/$CONFIG_FILE --no-backup
	else
		echo
		echo "ERROR: directory or file $1 does not exist!"
		exit 1
	fi
fi

# clean up temp header
if [ "$HEADER" != "" ] ; then
	rm -f $TEMP_CONFIG
fi