| archive/tar | Package tar implements access to tar archives. |
| bytes | Package bytes implements functions for the manipulation of byte slices. |
| compress/gzip | Package gzip implements reading and writing of gzip format compressed files, as specified in RFC 1952. |
| crypto/sha1 | Package sha1 implements the SHA1 hash algorithm as defined in RFC 3174. |
| errors | Package errors implements functions to manipulate errors. |
| 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 | Package build contains constants for the Go continous build system. |
| golang.org/x/build/buildenv | Package buildenv contains definitions for the environments the Go build system can run in. |
| golang.org/x/build/buildlet | Package buildlet contains client tools for working with a buildlet server. |
| golang.org/x/build/dashboard | Package dashboard contains shared configuration and logic used by various pieces of the Go continuous build system. |
| golang.org/x/build/envutil | Package envutil provides utilities for working with environment variables. |
| golang.org/x/build/tarutil | Package tarutil contains utilities for working with tar archives. |
| io | Package io provides basic interfaces to I/O primitives. |
| 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. |
| os/exec | Package exec runs external commands. |
| path/filepath | Package filepath implements utility routines for manipulating filename paths in a way compatible with the target operating system-defined file paths. |
| runtime | Package runtime contains operations that interact with Go's runtime system, such as functions to control goroutines. |
| sort | Package sort provides primitives for sorting slices and user-defined collections. |
| strconv | Package strconv implements conversions to and from string representations of basic data types. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |
| time | Package time provides functionality for measuring and displaying time. |