python: move filespec shell code into file

Cleanup.
And preparation for adding a bit more functionality.

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>

lang/python/files/python-package-install.sh

@@ -0,0 +1,38 @@
+#!/bin/sh
+
+process_filespec() {
+	local src_dir="$1"
+	local dst_dir="$2"
+	local filespec="$3"
+	echo "$filespec" | (
+	IFS='|'
+	while read fop fspec fperm; do
+		local fop=`echo "$fop" | tr -d ' \t\n'`
+		if [ "$fop" = "+" ]; then
+			if [ ! -e "${src_dir}${fspec}" ]; then
+				echo "File not found '${src_dir}${fspec}'"
+				exit 1
+			fi
+			dpath=`dirname "$fspec"`
+			if [ -z "$fperm" ]; then
+				dperm=`stat -c "%a" ${src_dir}${dpath}`
+			fi
+			mkdir -p -m$dperm ${dst_dir}${dpath}
+			echo "copying: '$fspec'"
+			cp -fpR ${src_dir}${fspec} ${dst_dir}${dpath}/
+			if [ -n "$fperm" ]; then
+				chmod -R $fperm ${dst_dir}${fspec}
+			fi
+		elif [ "$fop" = "-" ]; then
+			echo "removing: '$fspec'"
+			rm -fR ${dst_dir}${fspec}
+		elif [ "$fop" = "=" ]; then
+			echo "setting permissions: '$fperm' on '$fspec'"
+			chmod -R $fperm ${dst_dir}${fspec}
+		fi
+	done
+	)
+}
+
+process_filespec "$1" "$2" "$3"
+