feat: Initial support for Compose configs (#116)

pkg/api/service.go

@@ -60,6 +60,8 @@ type ServiceSpec struct {
 	Replicas uint `json:",omitempty"`
 	// Volumes is list of data volumes that can be mounted into the container.
 	Volumes []VolumeSpec
+	// Configs is list of configuration objects that can be mounted into the container.
+	Configs []ConfigSpec
 }
 
 // CaddyConfig returns the Caddy reverse proxy configuration for the service or an empty string if it's not defined.
@@ -79,6 +81,15 @@ func (s *ServiceSpec) Volume(name string) (VolumeSpec, bool) {
 	return VolumeSpec{}, false
 }
 
+func (s *ServiceSpec) Config(name string) (ConfigSpec, bool) {
+	for _, c := range s.Configs {
+		if c.Name == name {
+			return c, true
+		}
+	}
+	return ConfigSpec{}, false
+}
+
 // MountedDockerVolumes returns the list of volumes of VolumeTypeVolume type that are mounted into the container.
 func (s *ServiceSpec) MountedDockerVolumes() []VolumeSpec {
 	volumes := make(map[string]VolumeSpec)
@@ -157,6 +168,7 @@ func (s *ServiceSpec) Validate() error {
 		}
 	}
 
+	// Validate volumes
 	volumeNames := make(map[string]struct{})
 	for _, v := range s.Volumes {
 		if err := v.Validate(); err != nil {
@@ -177,6 +189,11 @@ func (s *ServiceSpec) Validate() error {
 		}
 	}
 
+	// Validate configs
+	if err := ValidateConfigsAndMounts(s.Configs, s.Container.ConfigMounts); err != nil {
+		return fmt.Errorf("validate service configs and mounts: %w", err)
+	}
+
 	return nil
 }
 
@@ -230,6 +247,9 @@ type ContainerSpec struct {
 	// VolumeMounts specifies how volumes are mounted into the container filesystem.
 	// Each mount references a volume defined in ServiceSpec.Volumes.
 	VolumeMounts []VolumeMount
+	// ConfigMounts specifies how configs are mounted into the container filesystem.
+	// Each mount references a config defined in ServiceSpec.Configs.
+	ConfigMounts []ConfigMount
 	// Volumes is list of data volumes to mount into the container.
 	// TODO(lhf): delete all usage, has been replaced with []VolumeMounts.
 	Volumes []string