Create a patch file:
- Locate the file we want to change, eg. path/file.json
- Create a copy of the file and edit it in the same directory, eg. path/file.new.json
- Create the diff file by running the program diff, eg. diff -u path/file.json path/file.new.json > file.json.diff 
- Ensure or change the first lines of the diff file in order to point to the desired files, eg. path/file.jsontobuild/path/file.json
- Apply the patch by running the program patch, eg. patch -p0 < file.json.diff 
Notes:
- Both programs, diff and patch, should be part of the core programs on any linux distribution
- The -uoption specifies that the created file is of unified type
- The -p0options specifies that the full paths inside the first lines of the diff file should be used
done_