const (
	DockerImageScheme = "docker-image"
	GitScheme         = "git"
	LocalScheme       = "local"
	HTTPScheme        = "http"
	HTTPSScheme       = "https"
)

type GitIdentifier struct {
	Remote           string
	Ref              string
	Subdir           string
	KeepGitDir       bool
	AuthTokenSecret  string
	AuthHeaderSecret string
	MountSSHSock     string
	KnownSSHHosts    string
}

type HTTPIdentifier struct {
	TLS      bool
	URL      string
	Checksum digest.Digest
	Filename string
	Perm     int
	UID      int
	GID      int
}

type Identifier interface {
	ID() string // until sources are in process this string comparison could be avoided
}

type ImageIdentifier struct {
	Reference   reference.Spec
	Platform    *specs.Platform
	ResolveMode ResolveMode
	RecordType  client.UsageRecordType
}

type LocalIdentifier struct {
	Name            string
	SessionID       string
	IncludePatterns []string
	ExcludePatterns []string
	FollowPaths     []string
	SharedKeyHint   string
}

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

type ResolveMode int

const (
	ResolveModeDefault ResolveMode = iota
	ResolveModeForcePull
	ResolveModePreferLocal
)

type Source interface {
	ID() string
	Resolve(ctx context.Context, id Identifier, sm *session.Manager, vtx solver.Vertex) (SourceInstance, error)
}

type SourceInstance interface {
	CacheKey(ctx context.Context, g session.Group, index int) (string, solver.CacheOpts, bool, error)
	Snapshot(ctx context.Context, g session.Group) (cache.ImmutableRef, error)
}