builder

type BBBuilder ¶

type BBBuilder struct{}

BBBuilder is an implementation of Builder that compiles many Go commands into one busybox-style binary.

BBBuilder will also include symlinks for each command to the busybox binary.

The compiled binary uses argv[0] to decide which Go command to run.

func (BBBuilder) Build(af initramfs.Files, opts Opts) error

func (BBBuilder) DefaultBinaryDir() string

type BinaryBuilder ¶

type BinaryBuilder struct{}

BinaryBuilder builds each Go command as a separate binary.

BinaryBuilder is an implementation of Builder.

func (BinaryBuilder) Build(af initramfs.Files, opts Opts) error

func (BinaryBuilder) DefaultBinaryDir() string

type Builder ¶

type Builder interface {
	// Build uses the given options to build Go packages and adds its files
	// to be included in the initramfs to the given ArchiveFiles.
	Build(initramfs.Files, Opts) error

	// DefaultBinaryDir is the initramfs' default directory for binaries
	// built using this builder.
	DefaultBinaryDir() string
}

Builder builds Go packages and adds the binaries to an initramfs.

The resulting files need not be binaries per se, but exec'ing the resulting file should result in the Go program being executed.

func GetBuilder(name string) (Builder, error)

type Opts ¶

type Opts struct {
	// Env is the Go compiler environment.
	Env golang.Environ

	// Packages are the Go packages to compile.
	//
	// Only an explicit list of Go import paths is accepted.
	//
	// E.g. cmd/go or github.com/u-root/u-root/cmds/ls.
	Packages []string

	// TempDir is a temporary directory where the compilation mode compiled
	// binaries can be placed.
	//
	// TempDir should contain no files.
	TempDir string

	// BinaryDir is the initramfs directory for built binaries.
	//
	// BinaryDir must be specified.
	BinaryDir string
}

Opts are arguments to the Builder.Build function.

type SourceBuilder ¶

type SourceBuilder struct{}

SourceBuilder includes full source for Go commands in the initramfs.

It also includes the Go toolchain in the initramfs, and a tool called installcommand that can compile the other commands using symlinks.

E.g. if "ls" is an included command, "ls" will be a symlink to "installcommand" in the initramfs, which uses argv[0] to figure out which command to compile.

func (SourceBuilder) Build(af initramfs.Files, opts Opts) error

func (SourceBuilder) DefaultBinaryDir() string