cfg

Documentation

Overview

Package cfg holds configuration shared by multiple parts of the go command.

Index

• Variables
• func BuildXWriter(ctx context.Context) (io.Writer, bool)
• func CanGetenv(key string) bool
• func EnvFile() (string, error)
• func GetArchEnv() (key, val string)
• func Getenv(key string) string
• func SetGOROOT(goroot string, isTestGo bool)
• func ToolExeSuffix() string
• func WithBuildXWriter(ctx context.Context, xLog io.Writer) context.Context
• type EnvVar

Variables

var (
	Goos   = envOr("GOOS", build.Default.GOOS)
	Goarch = envOr("GOARCH", build.Default.GOARCH)

	ExeSuffix = exeSuffix()

	// ModulesEnabled specifies whether the go command is running
	// in module-aware mode (as opposed to GOPATH mode).
	// It is equal to modload.Enabled, but not all packages can import modload.
	ModulesEnabled bool
)

Global build parameters (used during package load)

var (
	BuildA                 bool
	BuildBuildmode         string
	BuildBuildvcs          = "auto"
	BuildContext           = defaultContext()
	BuildMod               string
	BuildModExplicit       bool
	BuildModReason         string
	BuildLinkshared        bool
	BuildMSan              bool
	BuildASan              bool
	BuildCover             bool
	BuildCoverMode         string
	BuildCoverPkg          []string
	BuildN                 bool
	BuildO                 string
	BuildP                 = runtime.GOMAXPROCS(0)
	BuildPGO               string
	BuildPkgdir            string
	BuildRace              bool
	BuildToolexec          []string
	BuildToolchainName     string
	BuildToolchainCompiler func() string
	BuildToolchainLinker   func() string
	BuildTrimpath          bool
	BuildV                 bool
	BuildWork              bool
	BuildX                 bool

	ModCacheRW bool
	ModFile    string

	CmdName string

	DebugActiongraph  string
	DebugTrace        string
	DebugRuntimeTrace string

	// GoPathError is set when GOPATH is not set. it contains an
	// explanation why GOPATH is unset.
	GoPathError string
)

These are general "build flags" used by build and other commands.

var (
	// RawGOEXPERIMENT is the GOEXPERIMENT value set by the user.
	RawGOEXPERIMENT = envOr("GOEXPERIMENT", buildcfg.DefaultGOEXPERIMENT)
	// CleanGOEXPERIMENT is the minimal GOEXPERIMENT value needed to reproduce the
	// experiments enabled by RawGOEXPERIMENT.
	CleanGOEXPERIMENT = RawGOEXPERIMENT

	Experiment    *buildcfg.ExperimentFlags
	ExperimentErr error
)

Experiment configuration.

var (
	GOROOT string

	// Either empty or produced by filepath.Join(GOROOT, …).
	GOROOTbin string
	GOROOTpkg string
	GOROOTsrc string

	GOROOT_FINAL string

	GOBIN      = Getenv("GOBIN")
	GOMODCACHE = envOr("GOMODCACHE", gopathDir("pkg/mod"))

	// Used in envcmd.MkEnv and build ID computations.
	GOARM    = envOr("GOARM", fmt.Sprint(buildcfg.GOARM))
	GO386    = envOr("GO386", buildcfg.GO386)
	GOAMD64  = envOr("GOAMD64", fmt.Sprintf("%s%d", "v", buildcfg.GOAMD64))
	GOMIPS   = envOr("GOMIPS", buildcfg.GOMIPS)
	GOMIPS64 = envOr("GOMIPS64", buildcfg.GOMIPS64)
	GOPPC64  = envOr("GOPPC64", fmt.Sprintf("%s%d", "power", buildcfg.GOPPC64))
	GOWASM   = envOr("GOWASM", fmt.Sprint(buildcfg.GOWASM))

	GOPROXY    = envOr("GOPROXY", "")
	GOSUMDB    = envOr("GOSUMDB", "")
	GOPRIVATE  = Getenv("GOPRIVATE")
	GONOPROXY  = envOr("GONOPROXY", GOPRIVATE)
	GONOSUMDB  = envOr("GONOSUMDB", GOPRIVATE)
	GOINSECURE = Getenv("GOINSECURE")
	GOVCS      = Getenv("GOVCS")
)

var CmdEnv []EnvVar

CmdEnv is the new environment for running go tool commands. User binaries (during go test or go run) are run with OrigEnv, not CmdEnv.

var OrigEnv []string

OrigEnv is the original environment of the program at startup.

var SumdbDir = gopathDir("pkg/sumdb")

Functions

func BuildXWriter

func BuildXWriter(ctx context.Context) (io.Writer, bool)

BuildXWriter returns nil if BuildX is false, or the writer to which BuildX output should be written otherwise.

func CanGetenv

func CanGetenv(key string) bool

CanGetenv reports whether key is a valid go/env configuration key.

func EnvFile

func EnvFile() (string, error)

EnvFile returns the name of the Go environment configuration file.

func GetArchEnv

func GetArchEnv() (key, val string)

GetArchEnv returns the name and setting of the GOARCH-specific architecture environment variable. If the current architecture has no GOARCH-specific variable, GetArchEnv returns empty key and value.

func Getenv

func Getenv(key string) string

Getenv gets the value for the configuration key. It consults the operating system environment and then the go/env file. If Getenv is called for a key that cannot be set in the go/env file (for example GODEBUG), it panics. This ensures that CanGetenv is accurate, so that 'go env -w' stays in sync with what Getenv can retrieve.

func SetGOROOT

func SetGOROOT(goroot string, isTestGo bool)

SetGOROOT sets GOROOT and associated variables to the given values.

If isTestGo is true, build.ToolDir is set based on the TESTGO_GOHOSTOS and TESTGO_GOHOSTARCH environment variables instead of runtime.GOOS and runtime.GOARCH.

func ToolExeSuffix

func ToolExeSuffix() string

ToolExeSuffix returns the suffix for executables installed in build.ToolDir.

func WithBuildXWriter

func WithBuildXWriter(ctx context.Context, xLog io.Writer) context.Context

WithBuildXWriter returns a Context in which BuildX output is written to given io.Writer.

Types

type EnvVar

type EnvVar struct {
	Name  string
	Value string
}

An EnvVar is an environment variable Name=Value.