#!/bin/sh
#
# Hook used to indent all xcos files before commiting
#


#
# Pre-conditions
#
if test -d ".git/rebase-merge"          || \
   test -d ".git/rebase-apply"          || \
   test -f ".git/MERGE_HEAD"            || \
   test -f ".git/CHERRY_PICK_HEAD"      || \
   test -f ".git/BISECT_LOG"            
then
	exit 0
fi

#
# Configuration check
#
XMLINDENT="$(git config --get hooks.xmlindent)"

if test ! -x "$XMLINDENT"
then
	echo "Unable to find xmlindent executable on the configuration."
	echo
	echo "Please configure it with :"
	echo "  git config --global hooks.xmlindent C:/path/to/xmlindent"
	echo " or "
	echo "  git config --global hooks.xmlindent /usr/bin/xmlindent"
	echo
fi

if test -z "$(git config --get-all xmlindent.ignored)"
then
	echo "Unable to find xmlindent ignored list on the configuration, ignored"
	echo
	echo "You can configure it with :"
	echo "  git config --add xmlindent.ignored 'scilab/Visual-Studio-settings/*.xml' "
	echo "  git config --add xmlindent.ignored 'scilab/checkstyle/*.xml' "
	echo
	
	XMLINDENT_IGNORED=""
else
	XMLINDENT_IGNORED="$(find $(git config --get-all xmlindent.ignored))"
fi

INDENT="$(git config --get hooks.astyle)"
if test ! -x "$INDENT"
then
	echo "Unable to find astyle executable on the configuration."
	echo
	echo "Please configure it with :"
	echo "  git config --global hooks.astyle C:/path/to/astyle"
	echo " or "
	echo "  git config --global hooks.astyle /usr/bin/astyle"
	echo
fi

if test -z "$(git config --get-all astyle.ignored)"
then
	echo "Unable to find astyle ignored list on the configuration, ignored"
	echo
	echo "You can configure it with :"
	echo "  git config --add astyle.ignored 'scilab/modules/*/src/jni/*.hxx' "
	echo "  git config --add astyle.ignored 'scilab/modules/*/src/jni/*.cpp' "
	echo "  git config --add astyle.ignored 'scilab/modules/*/src/jni/*.c' "
	echo
	
	ASTYLE_IGNORED=""
else
	ASTYLE_IGNORED="$(find $(git config --get-all astyle.ignored))"
fi

# indent / format file by type
#
indent() {
	# getting against as the current commit
	if git rev-parse --verify HEAD >/dev/null 2>&1
	then
		local against=HEAD
	else
		# Initial commit: diff against an empty tree object
		local against=4b825dc642cb6eb9a060e54bf8d69288fbee4904
	fi

	# loop on modified files
	git diff --cached --name-only $against |while read file;
	do
		local ext=$(expr "$file" : ".*\(\..*\)")
		case $ext in
		.xcos|.xml)
			__indent_Xml;
		;;
		.h|.c|.hxx|.cpp)
			__indent_C;
		;;
		.java)
			__indent_java;
		;;
		esac
	done
}

# Indent the file with xmlindent if this is an xcos file
__indent_Xml() {

	if test ! -x "$XMLINDENT"
	then
		return;
	fi
	if test ! -f $file
	then
		return;
	fi

	# ignored globs
	if test -n "$XMLINDENT_IGNORED"
	then
		echo $XMLINDENT_IGNORED |grep -q $file
		if test $? -eq 0
		then
			echo "Formatting" $file	": ignored"
			return
		fi
	fi

	echo "Formatting" $file
	"$XMLINDENT" -i 2 -o "$file" "$file"
	git add "$file"
}

# Pre process before the indent
__pre_indent() {

	if test ! -x "$ASTYLE"
	then
		return;
	fi
	if test ! -f $file
	then
		return;
	fi

	# ignored globs
	if test -n "$ASTYLE_IGNORED"
	then
		echo $ASTYLE_IGNORED |grep -q "$file"
		if test $? -eq 0
		then
			echo "Indenting" $file	": ignored"
			return
		fi
	fi

	echo "Indenting" $file

}

# post process after the indent
__post_indent() {
	git add "$file"
}

COMMON_ASTYLE_ARGS="--pad-header -n --pad-oper --indent-col1-comments --indent-switches"

# Indent the file with `astyle' if this is a C/CPP file
__indent_C() {
	__pre_indent
	astyle $COMMON_ASTYLE_ARGS --style=linux --indent=spaces=4 -A1 "$file"
	__post_indent
}

# Indent the file with `astyle' if this is a Java file
__indent_java() {
	__pre_indent
	astyle $COMMON_ASTYLE_ARGS --style=java --indent=spaces=4 "$file"
	__post_indent

}

indent