chore: go mod tidy / vendor / make deps

vendor/github.com/docker/cli/internal/volumespec/volumespec.go

@@ -0,0 +1,124 @@
+package volumespec
+
+import (
+	"strings"
+	"unicode"
+	"unicode/utf8"
+
+	"github.com/docker/docker/api/types/mount"
+	"github.com/pkg/errors"
+)
+
+const endOfSpec = rune(0)
+
+// Parse parses a volume spec without any knowledge of the target platform
+func Parse(spec string) (VolumeConfig, error) {
+	volume := VolumeConfig{}
+
+	switch len(spec) {
+	case 0:
+		return volume, errors.New("invalid empty volume spec")
+	case 1, 2:
+		volume.Target = spec
+		volume.Type = string(mount.TypeVolume)
+		return volume, nil
+	}
+
+	buffer := []rune{}
+	for _, char := range spec + string(endOfSpec) {
+		switch {
+		case isWindowsDrive(buffer, char):
+			buffer = append(buffer, char)
+		case char == ':' || char == endOfSpec:
+			if err := populateFieldFromBuffer(char, buffer, &volume); err != nil {
+				populateType(&volume)
+				return volume, errors.Wrapf(err, "invalid spec: %s", spec)
+			}
+			buffer = []rune{}
+		default:
+			buffer = append(buffer, char)
+		}
+	}
+
+	populateType(&volume)
+	return volume, nil
+}
+
+func isWindowsDrive(buffer []rune, char rune) bool {
+	return char == ':' && len(buffer) == 1 && unicode.IsLetter(buffer[0])
+}
+
+func populateFieldFromBuffer(char rune, buffer []rune, volume *VolumeConfig) error {
+	strBuffer := string(buffer)
+	switch {
+	case len(buffer) == 0:
+		return errors.New("empty section between colons")
+	// Anonymous volume
+	case volume.Source == "" && char == endOfSpec:
+		volume.Target = strBuffer
+		return nil
+	case volume.Source == "":
+		volume.Source = strBuffer
+		return nil
+	case volume.Target == "":
+		volume.Target = strBuffer
+		return nil
+	case char == ':':
+		return errors.New("too many colons")
+	}
+	for _, option := range strings.Split(strBuffer, ",") {
+		switch option {
+		case "ro":
+			volume.ReadOnly = true
+		case "rw":
+			volume.ReadOnly = false
+		case "nocopy":
+			volume.Volume = &VolumeOpts{NoCopy: true}
+		default:
+			if isBindOption(option) {
+				volume.Bind = &BindOpts{Propagation: option}
+			}
+			// ignore unknown options
+		}
+	}
+	return nil
+}
+
+func isBindOption(option string) bool {
+	for _, propagation := range mount.Propagations {
+		if mount.Propagation(option) == propagation {
+			return true
+		}
+	}
+	return false
+}
+
+func populateType(volume *VolumeConfig) {
+	switch {
+	// Anonymous volume
+	case volume.Source == "":
+		volume.Type = string(mount.TypeVolume)
+	case isFilePath(volume.Source):
+		volume.Type = string(mount.TypeBind)
+	default:
+		volume.Type = string(mount.TypeVolume)
+	}
+}
+
+func isFilePath(source string) bool {
+	switch source[0] {
+	case '.', '/', '~':
+		return true
+	}
+	if len([]rune(source)) == 1 {
+		return false
+	}
+
+	// windows named pipes
+	if strings.HasPrefix(source, `\\`) {
+		return true
+	}
+
+	first, nextIndex := utf8.DecodeRuneInString(source)
+	return isWindowsDrive([]rune{first}, rune(source[nextIndex]))
+}