magefiles/build.go

@@ -10,6 +10,7 @@ import (
 
 	"github.com/magefile/mage/mg"
 	"github.com/magefile/mage/sh"
+	"github.com/magefile/mage/target"
 )
 
 const (
@@ -52,6 +53,13 @@ func FlamencoWorker() error {
 
 // Build the webapp as static files that can be served
 func WebappStatic() error {
+	runInstall, err := target.Dir("web/app/node_modules")
+	if err != nil {
+		return err
+	}
+	if runInstall {
+		mg.SerialDeps(WebappInstallDeps)
+	}
 	if err := cleanWebappStatic(); err != nil {
 		return err
 	}
@@ -63,7 +71,7 @@ func WebappStatic() error {
 	// When changing the base URL, also update the line
 	// e.GET("/app/*", echo.WrapHandler(webAppHandler))
 	// in `cmd/flamenco-manager/main.go`
-	err := sh.RunWithV(env,
+	err = sh.RunWithV(env,
 		"yarn",
 		"--cwd", "web/app",
 		"build",