worker: implement koji job types

The three new job types osbuild-koji, koji-init, and koji-finalize
allows the different tasks to be split appart and in particular for
there to be several builds on different architectures as part of a
given compose.

internal/worker/client.go

@@ -25,6 +25,8 @@ type Job interface {
 	Id() uuid.UUID
 	Type() string
 	Args(args interface{}) error
+	DynamicArgs(i int, args interface{}) error
+	NDynamicArgs() int
 	Update(result interface{}) error
 	Canceled() (bool, error)
 	UploadArtifact(name string, reader io.Reader) error
@@ -151,6 +153,18 @@ func (j *job) Args(args interface{}) error {
 	return nil
 }
 
+func (j *job) NDynamicArgs() int {
+	return len(j.dynamicArgs)
+}
+
+func (j *job) DynamicArgs(i int, args interface{}) error {
+	err := json.Unmarshal(j.dynamicArgs[i], args)
+	if err != nil {
+		return fmt.Errorf("error parsing job arguments: %v", err)
+	}
+	return nil
+}
+
 func (j *job) Update(result interface{}) error {
 	var buf bytes.Buffer
 	err := json.NewEncoder(&buf).Encode(api.UpdateJobJSONRequestBody{

internal/worker/json.go

@@ -26,6 +26,51 @@ type OSBuildJobResult struct {
 	TargetErrors  []string        `json:"target_errors,omitempty"`
 }
 
+type KojiInitJob struct {
+	Server  string `json:"server"`
+	Name    string `json:"name"`
+	Version string `json:"version"`
+	Release string `json:"release"`
+}
+
+type KojiInitJobResult struct {
+	BuildID   uint64 `json:"build_id"`
+	Token     string `json:"token"`
+	KojiError error  `json:"koji_error"`
+}
+
+type OSBuildKojiJob struct {
+	Manifest      distro.Manifest `json:"manifest"`
+	ImageName     string          `json:"image_name"`
+	KojiServer    string          `json:"koji_server"`
+	KojiDirectory string          `json:"koji_directory"`
+	KojiFilename  string          `json:"koji_filename"`
+}
+
+type OSBuildKojiJobResult struct {
+	HostOS        string          `json:"host_os"`
+	Arch          string          `json:"arch"`
+	OSBuildOutput *osbuild.Result `json:"osbuild_output"`
+	ImageHash     string          `json:"image_hash"`
+	ImageSize     uint64          `json:"image_size"`
+	KojiError     error           `json:"koji_error"`
+}
+
+type KojiFinalizeJob struct {
+	Server        string   `json:"server"`
+	Name          string   `json:"name"`
+	Version       string   `json:"version"`
+	Release       string   `json:"release"`
+	KojiFilenames []string `json:"koji_filenames"`
+	KojiDirectory string   `json:"koji_directory"`
+	TaskID        uint64   `json:"task_id"` /* https://pagure.io/koji/issue/215 */
+	StartTime     uint64   `json:"start_time"`
+}
+
+type KojiFinalizeJobResult struct {
+	KojiError error `json:"koji_error"`
+}
+
 //
 // JSON-serializable types for the HTTP API
 //