Initial commit

vendor/github.com/hyperhq/hypercli/runconfig/config.go

@@ -0,0 +1,71 @@
+package runconfig
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+
+	"github.com/hyperhq/hypercli/volume"
+	"github.com/docker/engine-api/types/container"
+	networktypes "github.com/docker/engine-api/types/network"
+)
+
+// DecodeContainerConfig decodes a json encoded config into a ContainerConfigWrapper
+// struct and returns both a Config and an HostConfig struct
+// Be aware this function is not checking whether the resulted structs are nil,
+// it's your business to do so
+func DecodeContainerConfig(src io.Reader) (*container.Config, *container.HostConfig, *networktypes.NetworkingConfig, error) {
+	var w ContainerConfigWrapper
+
+	decoder := json.NewDecoder(src)
+	if err := decoder.Decode(&w); err != nil {
+		return nil, nil, nil, err
+	}
+
+	hc := w.getHostConfig()
+
+	// Perform platform-specific processing of Volumes and Binds.
+	if w.Config != nil && hc != nil {
+
+		// Initialize the volumes map if currently nil
+		if w.Config.Volumes == nil {
+			w.Config.Volumes = make(map[string]struct{})
+		}
+
+		// Now validate all the volumes and binds
+		if err := validateVolumesAndBindSettings(w.Config, hc); err != nil {
+			return nil, nil, nil, err
+		}
+	}
+
+	// Certain parameters need daemon-side validation that cannot be done
+	// on the client, as only the daemon knows what is valid for the platform.
+	if err := ValidateNetMode(w.Config, hc); err != nil {
+		return nil, nil, nil, err
+	}
+
+	// Validate the isolation level
+	if err := ValidateIsolationLevel(hc); err != nil {
+		return nil, nil, nil, err
+	}
+	return w.Config, hc, w.NetworkingConfig, nil
+}
+
+// validateVolumesAndBindSettings validates each of the volumes and bind settings
+// passed by the caller to ensure they are valid.
+func validateVolumesAndBindSettings(c *container.Config, hc *container.HostConfig) error {
+
+	// Ensure all volumes and binds are valid.
+	for spec := range c.Volumes {
+		if _, err := volume.ParseMountSpec(spec, hc.VolumeDriver); err != nil {
+			return fmt.Errorf("Invalid volume spec %q: %v", spec, err)
+		}
+	}
+	for _, spec := range hc.Binds {
+		if _, err := volume.ParseMountSpec(spec, hc.VolumeDriver); err != nil {
+			return fmt.Errorf("Invalid bind mount spec %q: %v", spec, err)
+		}
+	}
+
+	return nil
+}