This tool needs to run on the Linux. You should have the objdump and strings commands installed in advance to use extractSHC. After a successful run, it will generate a new file with the same name and a .patch extension. Run the file. During normal execution, the standard output will print the original script.
./extractSHC.py [file]
example:
./extractSHC.py test
./test.patch > out.sh