| bytes | Package bytes implements functions for the manipulation of byte slices. |
| crypto/md5 | Package md5 implements the MD5 hash algorithm as defined in RFC 1321. |
| flag | Package flag implements command-line flag parsing. |
| fmt | Package fmt implements formatted I/O with functions analogous to C's printf and scanf. |
| golang.org/x/build/auth | Package auth contains shared code related to OAuth2 and obtaining tokens for a project. |
| golang.org/x/build/envutil | Package envutil provides utilities for working with environment variables. |
| golang.org/x/net/context | Package context defines the Context type, which carries deadlines, cancelation signals, and other request-scoped values across API boundaries and between processes. |
| google.golang.org/cloud | Package cloud contains Google Cloud Platform APIs related types and common functions. |
| google.golang.org/cloud/storage | Package storage contains a Google Cloud Storage client. |
| io | Package io provides basic interfaces to I/O primitives. |
| log | Package log implements a simple logging package. |
| net/http | Package http provides HTTP client and server implementations. |
| os | Package os provides a platform-independent interface to operating system functionality. |
| os/exec | Package exec runs external commands. |
| runtime | Package runtime contains operations that interact with Go's runtime system, such as functions to control goroutines. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |
| time | Package time provides functionality for measuring and displaying time. |