1 files changed, 59 insertions, 2 deletions
diff --git a/webui/webui.go b/webui/webui.go
index 048cf00e8..965ed8aa9 100644
--- a/webui/webui.go
+++ b/webui/webui.go
@@ -3,9 +3,66 @@ package webui
 
 import (
 	"fmt"
+	"log"
 	"net/http"
+	"net/http/httputil"
+	"net/url"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"strings"
 )
 
-func Handle(w http.ResponseWriter, r *http.Request) {
-	fmt.Fprintf(w, "Hello, world")
+type Server struct {
+	DevMode bool
+}
+
+func (s *Server) Start() {
+}
+
+func (s *Server) Handle(w http.ResponseWriter, r *http.Request) {
+	if s.DevMode {
+		au, _ := url.Parse("http://127.0.0.1:4000")
+		proxy := httputil.NewSingleHostReverseProxy(au)
+		proxy.ServeHTTP(w, r)
+		return
+	}
+	fmt.Fprintf(w, "Hello production")
+}
+
+func RunJSDevServer() (cleanup func()) {
+	root := gitRootDir()
+	webuiPath := filepath.Join(root, "webui")
+
+	yarn := filepath.Join(root, "tool", "yarn")
+	node := filepath.Join(root, "tool", "node")
+	vite := filepath.Join(webuiPath, "node_modules", ".bin", "vite")
+
+	log.Printf("installing JavaScript deps using %s... (might take ~30s)", yarn)
+	out, err := exec.Command(yarn, "--non-interactive", "-s", "--cwd", webuiPath, "install").CombinedOutput()
+	if err != nil {
+		log.Fatalf("error running admin panel's yarn install: %v, %s", err, out)
+	}
+	log.Printf("starting JavaScript dev server...")
+	cmd := exec.Command(node, vite)
+	cmd.Dir = webuiPath
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	if err := cmd.Start(); err != nil {
+		log.Fatalf("Starting JS dev server: %v", err)
+	}
+	log.Printf("JavaScript dev server running as pid %d", cmd.Process.Pid)
+	return func() {
+		cmd.Process.Signal(os.Interrupt)
+		err := cmd.Wait()
+		log.Printf("JavaScript dev server exited: %v", err)
+	}
+}
+
+func gitRootDir() string {
+	top, err := exec.Command("git", "rev-parse", "--show-toplevel").Output()
+	if err != nil {
+		log.Fatalf("failed to find git top level (not in corp git?): %v", err)
+	}
+	return strings.TrimSpace(string(top))
 }