| 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/tools/go/analysis | Package analysis defines the interface between a modular static analysis and an analysis driver program. |
| golang.org/x/tools/go/analysis/internal/analysisflags | Package analysisflags defines helpers for processing flags of analysis driver tools. |
| golang.org/x/tools/go/analysis/internal/checker | Package internal/checker defines various implementation helpers for the singlechecker and multichecker packages, which provide the complete main function for an analysis driver executable based on go/packages. |
| golang.org/x/tools/go/analysis/unitchecker | The unitchecker package defines the main function for an analysis driver that analyzes a single compilation unit during a build. |
| 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. |
| strings | Package strings implements simple functions to manipulate UTF-8 encoded strings. |