refactor: move deploy code to internal package

Move the deploy code to an internal package in preparation for the
support for multiple mage targets deploying services to the Flow
Platform.

Add an option to deploy a service in the foreground.

internal/deploy/deploy.go

@@ -0,0 +1,32 @@
+package deploy
+
+import (
+	"flow/services/internal"
+	"fmt"
+	"os"
+
+	"github.com/magefile/mage/sh"
+)
+
+func Deploy(dockerHost, environment, name string, daemon bool) error {
+	os.Setenv("DOCKER_HOST", dockerHost)
+
+	command := []string{
+		"docker",
+		"compose",
+		"--project-directory",
+		fmt.Sprintf("%s/%s/compose", internal.RootBuildDir, environment),
+		"up",
+		"--build",
+	}
+
+	if daemon {
+		command = append(command, "-d")
+	}
+
+	if name != "all" {
+		command = append(command, name)
+	}
+
+	return sh.RunV(command[0], command[1:]...)
+}

magefiles/magefile.go

@@ -5,6 +5,7 @@ package main
 import (
 	"flow/services/internal"
 	"flow/services/internal/config"
+	"flow/services/internal/deploy"
 	"flow/services/internal/prepare"
 	"fmt"
 	"os"
@@ -36,10 +37,10 @@ func Clean(environment string) error {
 	return nil
 }
 
-// Deploy deploys the services to the Flow Platform.
-func Deploy(environment, name string) error {
+// Deploy deploys the service(s) to the Flow Platform.
+func Deploy(environment, service string) error {
 	mg.Deps(
-		mg.F(Prepare, environment, name),
+		mg.F(Prepare, environment, service),
 	)
 
 	cfg, err := config.NewConfig(environment)
@@ -47,23 +48,11 @@ func Deploy(environment, name string) error {
 		return fmt.Errorf("unable to load the configuration; %w", err)
 	}
 
-	os.Setenv("DOCKER_HOST", cfg.Docker.Host)
-
-	command := []string{
-		"docker",
-		"compose",
-		"--project-directory",
-		fmt.Sprintf("%s/%s/compose", internal.RootBuildDir, environment),
-		"up",
-		"-d",
-		"--build",
+	if err := deploy.Deploy(cfg.Docker.Host, environment, service, true); err != nil {
+		return fmt.Errorf("error deploying %q; %w", service, err)
 	}
 
-	if name != "all" {
-		command = append(command, name)
-	}
-
-	return sh.RunV(command[0], command[1:]...)
+	return nil
 }
 
 // Prepare prepares the service's build directory.