build: add dependencies for render targets

- add downloading the forgejo binary as a dependency to rendering the
  forgejo templates.
- add rendering the compose file as a dependency for rendering
  non-compose targets.

magefiles/mage.go

@@ -7,6 +7,7 @@ import (
 	"os"
 
 	"github.com/magefile/mage/sh"
+	"github.com/magefile/mage/mg"
 )
 
 const (
@@ -40,13 +41,23 @@ func Clean() error {
 
 // Render renders the template files.
 func Render(name string) error {
+	if name == "forgejo" {
+		mg.Deps(DownloadForgejo)
+	}
+
 	cfg, err := newConfig(configFile)
 	if err != nil {
 		return fmt.Errorf("unable to load the configuration; %v", err)
 	}
 
+	if name != "compose" {
+		if err := render(cfg, "compose"); err != nil {
+			return fmt.Errorf("an error occurred whilst rendering the compose file; %w", err)
+		}
+	}
+
 	if err := render(cfg, name); err != nil {
-		return fmt.Errorf("an error occurred whilst rendering the templates; %v", err)
+		return fmt.Errorf("an error occurred whilst rendering the templates; %w", err)
 	}
 
 	return nil
@@ -56,7 +67,7 @@ func Render(name string) error {
 func Deploy(name string) error {
 	cfg, err := newConfig(configFile)
 	if err != nil {
-		return fmt.Errorf("unable to load the configuration; %v", err)
+		return fmt.Errorf("unable to load the configuration; %w", err)
 	}
 
 	os.Setenv("DOCKER_HOST", cfg.DockerHost)