worker: move Job type to the jobqueue package

The main purpose of this is to share the structs between the server
and the client, and let the compiler ensure that our marshaling and
unmarshaling matches.

In the future we also want to make it easier to write unittests for
this code.

Signed-off-by: Tom Gundersen <teg@jklm.no>

internal/jobqueue/job.go

@@ -0,0 +1,83 @@
+package jobqueue
+
+import (
+	"encoding/json"
+	"os"
+	"os/exec"
+
+	"github.com/google/uuid"
+	"github.com/osbuild/osbuild-composer/internal/pipeline"
+	"github.com/osbuild/osbuild-composer/internal/target"
+)
+
+type Job struct {
+	ID       uuid.UUID          `json:"id"`
+	Pipeline *pipeline.Pipeline `json:"pipeline"`
+	Targets  []*target.Target   `json:"targets"`
+}
+
+type JobStatus struct {
+	Status string `json:"status"`
+}
+
+func (job *Job) Run() error {
+	cmd := exec.Command("osbuild", "--store", "/var/cache/osbuild-composer/store", "--json", "-")
+	cmd.Stderr = os.Stderr
+
+	stdin, err := cmd.StdinPipe()
+	if err != nil {
+		return err
+	}
+
+	stdout, err := cmd.StdoutPipe()
+	if err != nil {
+		return err
+	}
+
+	err = cmd.Start()
+	if err != nil {
+		return err
+	}
+
+	err = json.NewEncoder(stdin).Encode(job.Pipeline)
+	if err != nil {
+		return err
+	}
+	stdin.Close()
+
+	var result struct {
+		TreeID   string `json:"tree_id"`
+		OutputID string `json:"output_id"`
+	}
+	err = json.NewDecoder(stdout).Decode(&result)
+	if err != nil {
+		return err
+	}
+
+	err = cmd.Wait()
+	if err != nil {
+		return err
+	}
+
+	for _, t := range job.Targets {
+		switch options := t.Options.(type) {
+		case *target.LocalTargetOptions:
+			err = os.MkdirAll(options.Location, 0755)
+			if err != nil {
+				panic(err)
+			}
+
+			cp := exec.Command("cp", "-a", "-L", "/var/cache/osbuild-composer/store/refs/"+result.OutputID+"/.", options.Location)
+			cp.Stderr = os.Stderr
+			cp.Stdout = os.Stdout
+			err = cp.Run()
+			if err != nil {
+				panic(err)
+			}
+		default:
+			panic("foo")
+		}
+	}
+
+	return nil
+}