| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| github.com/evanphx/json-patch | |
| github.com/jessevdk/go-flags | Package flags provides an extensive command line option parser. |
| io/ioutil | Package ioutil implements some I/O utility functions. |
| log | Package log implements a simple logging package. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| path/filepath | Package filepath implements utility routines for manipulating filename paths in a way compatible with the target operating system-defined file paths. |