add_fields

#!/bin/sh

orig="$1"
dest="$2"

pkg=`basename $orig .debdesc`

cp "$orig" "$dest"

version="1"
if grep -q '^Version:' $orig ; then
	version=`cat $orig | grep '^Version:' | cut -d: -f2`
	grep -v "^Version:" $dest > $dest.tmp
	mv $dest.tmp $dest
fi
echo "Version: $version~dev`date +%Y%m%d`.`date +%H%M%S`" >> "$dest"
echo "Architecture: all" >> "$dest"

to_copy=`cat $dest | grep "^Copy: " | sed -e 's/Copy: //'`

files_mapping () {
	if [ -d "./$pkg/files" ] ; then
		files_path="./$pkg/files"
	else
		files_path="./$pkg"
	fi

	echo "$to_copy" | while read f ; do
		echo " $files_path/$f"
	done
}

diffable_files () {
	[ -d $pkg/diff/ ] || return
	cd $pkg/diff/
	find -type f -name '*.orig' | sed -e 's#^\./##' | sed -e 's/\.orig$//'
}

patch_file_local () {
	f=$1
	echo "./$pkg/diff/$f.diff"
}

patch_file_install_dir () {
	d=`dirname $1`
	echo "/usr/share/$pkg/patches/$d/"
}

diffable=`diffable_files`

patch_mapping () {
	for f in $diffable ; do
		patch=`patch_file_local $f`
		patch_inst_dir=`patch_file_install_dir $f`
		diff -u $pkg/diff/$f.orig $pkg/diff/$f | sed -e "s#$pkg/diff##" > "$patch"
		echo " $patch $patch_inst_dir"
	done
}

if [ -n "$to_copy" ] || [ -n "$diffable" ] ; then
	echo -n "Files:" >> "$dest"
	[ -n "$to_copy" ] && echo "`files_mapping`" >> "$dest"
	[ -n "$diffable" ] && echo "`patch_mapping`" >> "$dest"
	echo >> "$dest"
fi

if [ -n "$diffable" ] ; then
	echo "Pre-Depends: patch" >> "$dest"

	echo "File: postinst" >> "$dest"
	echo " #!/bin/sh -e" >> "$dest"
	for f in $diffable ; do
		echo " patch -p0 -i /usr/share/$pkg/patches/$f.diff" >> "$dest"
	done
	echo >> "$dest"

	echo "File: prerm" >> "$dest"
	echo " #!/bin/sh -e" >> "$dest"
	for f in $diffable ; do
		echo " patch -R -p0 -i /usr/share/$pkg/patches/$f.diff" >> "$dest"
	done
	echo >> "$dest"
fi

grep -v "^Copy:" "$dest" > "$dest.tmp"
mv "$dest.tmp" "$dest"

grep -v "^Diff:" "$dest" > "$dest.tmp"
mv "$dest.tmp" "$dest"