var Go = &Command{ UsageLine: "go", Long: `Go is a tool for managing Go source code.`, }
Interrupted is closed when the go command receives an interrupt signal.
var Interrupted = make(chan struct{})
var NetLimitGodebug = godebug.New("#cmdgonetlimit")
SignalTrace is the signal to send to make a Go program crash with a stack trace.
var SignalTrace os.Signal = syscall.SIGQUIT
Usage is the usage-reporting function, filled in by package main but here for reference by other packages.
var Usage func()
func AcquireNet() (release func(), err error)
AcquireNet acquires a semaphore token for a network operation.
func AddBuildFlagsNX(flags *flag.FlagSet)
AddBuildFlagsNX adds the -n and -x build flags to the flag set.
func AddChdirFlag(flags *flag.FlagSet)
AddChdirFlag adds the -C flag to the flag set.
func AddModCommonFlags(flags *flag.FlagSet)
AddModCommonFlags adds the module-related flags common to build commands and 'go mod' subcommands.
func AddModFlag(flags *flag.FlagSet)
AddModFlag adds the -mod build flag to the flag set.
func AppendPATH(base []string) []string
AppendPATH returns the result of appending PATH=$GOROOT/bin:$PATH (or the platform equivalent) to the environment base.
func AppendPWD(base []string, dir string) []string
AppendPWD returns the result of appending PWD=dir to the environment base.
The resulting environment makes os.Getwd more efficient for a subprocess running in dir, and also improves the accuracy of paths relative to dir if one or more elements of dir is a symlink.
func AtExit(f func())
func ChdirFlag(s string) error
func Cwd() string
Cwd returns the current working directory at the time of the first call.
func Error(err error)
func Errorf(format string, args ...any)
func Exit()
func ExitIfErrors()
func Fatal(err error)
func Fatalf(format string, args ...any)
func GOFLAGS() []string
GOFLAGS returns the flags from $GOFLAGS. The list can be assumed to contain one string per flag, with each string either beginning with -name or --name.
func GetExitStatus() int
func InGOFLAGS(flag string) bool
InGOFLAGS returns whether GOFLAGS contains the given flag, such as "-mod".
func InitGOFLAGS()
InitGOFLAGS initializes the goflags list from $GOFLAGS. If goflags is already initialized, it does nothing.
func IsNull(path string) bool
IsNull reports whether the path is a common name for the null device. It returns true for /dev/null on Unix, or NUL (case-insensitive) on Windows.
func IsTestFile(file string) bool
IsTestFile reports whether the source file is a set of tests and should therefore be excluded from coverage analysis.
func NetLimit() (int, bool)
NetLimit returns the limit on concurrent network operations configured by GODEBUG=cmdgonetlimit, if any.
A limit of 0 (indicated by 0, true) means that network operations should not be allowed.
func RelPaths(paths []string) []string
RelPaths returns a copy of paths with absolute paths made relative to the current directory if they would be shorter.
func Run(cmdargs ...any)
Run runs the command, with stdout and stderr connected to the go command's own stdout and stderr. If the command fails, Run reports the error using Errorf.
func RunStdin(cmdline []string)
RunStdin is like run but connects Stdin.
func SetExitStatus(n int)
func SetFromGOFLAGS(flags *flag.FlagSet)
SetFromGOFLAGS sets the flags in the given flag set using settings in $GOFLAGS.
func ShortPath(path string) string
ShortPath returns an absolute or relative name for path, whatever is shorter.
func StartSigHandlers()
StartSigHandlers starts the signal handlers.
func Tool(toolName string) string
Tool returns the path to the named tool (for example, "vet"). If the tool cannot be found, Tool exits the process.
func ToolPath(toolName string) (string, error)
ToolPath returns the path at which we expect to find the named tool (for example, "vet"), and the error (if any) from statting that path.
func UncachedCwd() string
UncachedCwd returns the current working directory. Most callers should use Cwd, which caches the result for future use. UncachedCwd is appropriate to call early in program startup before flag parsing, because the -C flag may change the current directory.
A Command is an implementation of a go command like go build or go fix.
type Command struct {
// Run runs the command.
// The args are the arguments after the command name.
Run func(ctx context.Context, cmd *Command, args []string)
// UsageLine is the one-line usage message.
// The words between "go" and the first flag or argument in the line are taken to be the command name.
UsageLine string
// Short is the short description shown in the 'go help' output.
Short string
// Long is the long message shown in the 'go help <this-command>' output.
Long string
// Flag is a set of flags specific to this command.
Flag flag.FlagSet
// CustomFlags indicates that the command will do its own
// flag parsing.
CustomFlags bool
// Commands lists the available commands and help topics.
// The order here is the order in which they are printed by 'go help'.
// Note that subcommands are in general best avoided.
Commands []*Command
}
func (c *Command) LongName() string
LongName returns the command's long name: all the words in the usage line between "go" and a flag or argument,
func (c *Command) Lookup(name string) *Command
Lookup returns the subcommand with the given name, if any. Otherwise it returns nil.
Lookup ignores subcommands that have len(c.Commands) == 0 and c.Run == nil. Such subcommands are only for use as arguments to "help".
func (c *Command) Name() string
Name returns the command's short name: the last word in the usage line before a flag or argument.
func (c *Command) Runnable() bool
Runnable reports whether the command can be run; otherwise it is a documentation pseudo-command such as importpath.
func (c *Command) Usage()
A StringsFlag is a command-line flag that interprets its argument as a space-separated list of possibly-quoted strings.
type StringsFlag []string
func (v *StringsFlag) Set(s string) error
func (v *StringsFlag) String() string