move secretopt to opts pkg

Signed-off-by: Evan Hazlett <ejhazlett@gmail.com>

opts/secret.go

@@ -0,0 +1,95 @@
+package opts
+
+import (
+	"encoding/csv"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strconv"
+	"strings"
+
+	"github.com/docker/docker/api/types"
+)
+
+// SecretOpt is a Value type for parsing secrets
+type SecretOpt struct {
+	values []*types.SecretRequestOptions
+}
+
+// Set a new secret value
+func (o *SecretOpt) Set(value string) error {
+	csvReader := csv.NewReader(strings.NewReader(value))
+	fields, err := csvReader.Read()
+	if err != nil {
+		return err
+	}
+
+	options := &types.SecretRequestOptions{
+		Source: "",
+		Target: "",
+		UID:    "0",
+		GID:    "0",
+		Mode:   0444,
+	}
+
+	for _, field := range fields {
+		parts := strings.SplitN(field, "=", 2)
+		key := strings.ToLower(parts[0])
+
+		if len(parts) != 2 {
+			return fmt.Errorf("invalid field '%s' must be a key=value pair", field)
+		}
+
+		value := parts[1]
+		switch key {
+		case "source":
+			options.Source = value
+		case "target":
+			tDir, _ := filepath.Split(value)
+			if tDir != "" {
+				return fmt.Errorf("target must not be a path")
+			}
+			options.Target = value
+		case "uid":
+			options.UID = value
+		case "gid":
+			options.GID = value
+		case "mode":
+			m, err := strconv.ParseUint(value, 0, 32)
+			if err != nil {
+				return fmt.Errorf("invalid mode specified: %v", err)
+			}
+
+			options.Mode = os.FileMode(m)
+		default:
+			return fmt.Errorf("invalid field in secret request: %s", key)
+		}
+	}
+
+	if options.Source == "" {
+		return fmt.Errorf("source is required")
+	}
+
+	o.values = append(o.values, options)
+	return nil
+}
+
+// Type returns the type of this option
+func (o *SecretOpt) Type() string {
+	return "secret"
+}
+
+// String returns a string repr of this option
+func (o *SecretOpt) String() string {
+	secrets := []string{}
+	for _, secret := range o.values {
+		repr := fmt.Sprintf("%s -> %s", secret.Source, secret.Target)
+		secrets = append(secrets, repr)
+	}
+	return strings.Join(secrets, ", ")
+}
+
+// Value returns the secret requests
+func (o *SecretOpt) Value() []*types.SecretRequestOptions {
+	return o.values
+}