package standard library
Version: go1.19.4 Latest Latest

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Published: Dec 6, 2022 License: BSD-3-Clause Imports: 12 Imported by: 0



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



This section is empty.


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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)

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var (
	BuildA                 bool     // -a flag
	BuildBuildmode         string   // -buildmode flag
	BuildBuildvcs          = "auto" // -buildvcs flag: "true", "false", or "auto"
	BuildContext           = defaultContext()
	BuildMod               string                  // -mod flag
	BuildModExplicit       bool                    // whether -mod was set explicitly
	BuildModReason         string                  // reason -mod was set, if set by default
	BuildI                 bool                    // -i flag
	BuildLinkshared        bool                    // -linkshared flag
	BuildMSan              bool                    // -msan flag
	BuildASan              bool                    // -asan flag
	BuildN                 bool                    // -n flag
	BuildO                 string                  // -o flag
	BuildP                 = runtime.GOMAXPROCS(0) // -p flag
	BuildPkgdir            string                  // -pkgdir flag
	BuildRace              bool                    // -race flag
	BuildToolexec          []string                // -toolexec flag
	BuildToolchainName     string
	BuildToolchainCompiler func() string
	BuildToolchainLinker   func() string
	BuildTrimpath          bool // -trimpath flag
	BuildV                 bool // -v flag
	BuildWork              bool // -work flag
	BuildX                 bool // -x flag

	ModCacheRW bool   // -modcacherw flag
	ModFile    string // -modfile flag

	CmdName string // "build", "install", "list", "mod tidy", etc.

	DebugActiongraph string // -debug-actiongraph flag (undocumented, unstable)
	DebugTrace       string // -debug-trace flag

	// 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.

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var (
	// RawGOEXPERIMENT is the GOEXPERIMENT value set by the user.
	// CleanGOEXPERIMENT is the minimal GOEXPERIMENT value needed to reproduce the
	// experiments enabled by RawGOEXPERIMENT.

	Experiment    *buildcfg.ExperimentFlags
	ExperimentErr error

Experiment configuration.

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var (
	GOROOT       string
	GOROOTbin    string
	GOROOTpkg    string
	GOROOTsrc    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", ",direct")
	GOSUMDB    = envOr("GOSUMDB", "")
	GOVCS      = Getenv("GOVCS")
View Source
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.

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var OrigEnv []string

OrigEnv is the original environment of the program at startup.

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var SumdbDir = gopathDir("pkg/sumdb")


func CanGetenv added in go1.13

func CanGetenv(key string) bool

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

func EnvFile added in go1.13

func EnvFile() (string, error)

EnvFile returns the name of the Go environment configuration file.

func GetArchEnv added in go1.13

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 added in go1.13

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 added in go1.19

func SetGOROOT(goroot string)


type EnvVar

type EnvVar struct {
	Name  string
	Value string

An EnvVar is an environment variable Name=Value.

Source Files

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