gcimporter

Documentation

Overview

Package gcimporter implements Import for gc-generated object files. Importing this package installs Import as go/types.DefaultImport.

Index

• func FindExportData(r *bufio.Reader) (err error)
• func FindPkg(path, srcDir string) (filename, id string)
• func Import(imports map[string]*types.Package, path string) (pkg *types.Package, err error)
• func ImportData(imports map[string]*types.Package, filename, id string, data io.Reader) (pkg *types.Package, err error)

Functions

func FindExportData

func FindExportData(r *bufio.Reader) (err error)

FindExportData positions the reader r at the beginning of the export data section of an underlying GC-created object/archive file by reading from it. The reader must be positioned at the start of the file before calling this function.

func FindPkg

func FindPkg(path, srcDir string) (filename, id string)

FindPkg returns the filename and unique package id for an import path based on package information provided by build.Import (using the build.Default build.Context). If no file was found, an empty filename is returned.

func Import

func Import(imports map[string]*types.Package, path string) (pkg *types.Package, err error)

Import imports a gc-generated package given its import path, adds the corresponding package object to the imports map, and returns the object. Local import paths are interpreted relative to the current working directory. The imports map must contains all packages already imported.

func ImportData

func ImportData(imports map[string]*types.Package, filename, id string, data io.Reader) (pkg *types.Package, err error)

ImportData imports a package by reading the gc-generated export data, adds the corresponding package object to the imports map indexed by id, and returns the object.

The imports map must contains all packages already imported. The data reader position must be the beginning of the export data section. The filename is only used in error messages.

If imports[id] contains the completely imported package, that package can be used directly, and there is no need to call this function (but there is also no harm but for extra time used).