var (
	// VCSTestRepoURL is the URL of the HTTP server that serves the repos for
	// vcs-test.golang.org.
	//
	// In tests, this is set to the URL of an httptest.Server hosting a
	// cmd/go/internal/vcweb.Server.
	VCSTestRepoURL string

	// VCSTestHosts is the set of hosts supported by the vcs-test server.
	VCSTestHosts []string

	// VCSTestIsLocalHost reports whether the given URL refers to a local
	// (loopback) host, such as "localhost" or "127.0.0.1:8080".
	VCSTestIsLocalHost func(*urlpkg.URL) bool
)

type Cmd struct {
	Name      string
	Cmd       string     // name of binary to invoke command
	Env       []string   // any environment values to set/override
	RootNames []rootName // filename and mode indicating the root of a checkout directory

	CreateCmd   []string // commands to download a fresh copy of a repository
	DownloadCmd []string // commands to download updates into an existing repository

	TagCmd         []tagCmd // commands to list tags
	TagLookupCmd   []tagCmd // commands to lookup tags before running tagSyncCmd
	TagSyncCmd     []string // commands to sync to specific tag
	TagSyncDefault []string // commands to sync to default tag

	Scheme  []string
	PingCmd string

	RemoteRepo  func(v *Cmd, rootDir string) (remoteRepo string, err error)
	ResolveRepo func(v *Cmd, rootDir, remoteRepo string) (realRepo string, err error)
	Status      func(v *Cmd, rootDir string) (Status, error)
}

type ImportMismatchError struct {
	// contains filtered or unexported fields
}

type ModuleMode int

const (
	IgnoreMod ModuleMode = iota
	PreferMod
)

type RepoRoot struct {
	Repo     string // repository URL, including scheme
	Root     string // import path corresponding to root of repo
	IsCustom bool   // defined by served <meta> tags (as opposed to hard-coded pattern)
	VCS      *Cmd
}

type Status struct {
	Revision    string    // Optional.
	CommitTime  time.Time // Optional.
	Uncommitted bool      // Required.
}