feat: recipe sync

cli/recipe/recipe.go

@@ -271,15 +271,59 @@ This is step 1 of upgrading a recipe. Step 2 is running "abra recipe sync
 }
 
 var recipeSyncCommand = &cli.Command{
-	Name:      "sync",
-	Usage:     "Generate recipe labels and publish tags",
+	Name:  "sync",
+	Usage: "Generate recipe labels",
+	Description: `
+This command will generate labels for each service which correspond to the
+following format:
+
+    coop-cloud.${STACK_NAME}.${SERVICE_NAME}.version=${IMAGE_TAG}-${IMAGE_DIGEST}
+
+The <recipe> configuration will be updated on the local file system. These
+labels are consumed by abra in other command invocations and used to determine
+the versioning metadata of up-and-running containers are.
+`,
 	ArgsUsage: "<recipe>",
 	Action: func(c *cli.Context) error {
 		recipe := c.Args().First()
 		if recipe == "" {
 			internal.ShowSubcommandHelpAndError(c, errors.New("no recipe provided"))
 		}
-		// TODO: part 2 of https://git.coopcloud.tech/coop-cloud/go-abra/issues/39#issuecomment-8066
+
+		compose, err := config.GetAppComposeFiles(recipe)
+		if err != nil {
+			logrus.Fatal(err)
+		}
+
+		hasAppService := false
+		for _, service := range compose.Services {
+			if service.Name == "app" {
+				hasAppService = true
+			}
+		}
+
+		if !hasAppService {
+			logrus.Fatal(fmt.Sprintf("No 'app' service defined in '%s', cannot proceed", recipe))
+		}
+
+		for _, service := range compose.Services {
+			img, _ := reference.ParseNormalizedNamed(service.Image)
+			if err != nil {
+				logrus.Fatal(err)
+			}
+
+			digest, err := client.GetTagDigest(img)
+			if err != nil {
+				logrus.Fatal(err)
+			}
+
+			tag := img.(reference.NamedTagged).Tag()
+			label := fmt.Sprintf("coop-cloud.${STACK_NAME}.%s.version=%s-%s", service.Name, tag, digest)
+			if err := config.UpdateAppComposeLabel(recipe, service.Name, label); err != nil {
+				logrus.Fatal(err)
+			}
+		}
+
 		return nil
 	},
 }