Add post-installation redirect based on admin account status

options/locale/locale_en-US.ini

@@ -421,6 +421,7 @@ remember_me.compromised = The login token is not valid anymore which may indicat
 forgot_password_title= Forgot Password
 forgot_password = Forgot password?
 need_account = Need an account?
+sign_up_tip = You are registering the first account in the system. Upon successful registration, you will become the Super Administrator. Please carefully remember your username and password, as losing this information could cause significant inconvenience later.
 sign_up_now = Register now.
 sign_up_successful = Account was successfully created. Welcome!
 confirmation_mail_sent_prompt_ex = A new confirmation email has been sent to <b>%s</b>. Please check your inbox within the next %s to complete the registration process. If your registration email address is incorrect, you can sign in again and change it.

routers/install/install.go

@@ -558,6 +558,8 @@ func SubmitInstall(ctx *context.Context) {
 			}
 			log.Info("Admin account already exist")
 			u, _ = user_model.GetUserByName(ctx, u.Name)
+		} else {
+			ctx.Data["IsAccountCreated"] = true
 		}
 
 		nt, token, err := auth_service.CreateAuthTokenForUserID(ctx, u.ID)

routers/web/auth/auth.go

@@ -424,6 +424,8 @@ func SignUp(ctx *context.Context) {
 
 	ctx.Data["SignUpLink"] = setting.AppSubURL + "/user/sign_up"
 
+	ctx.Data["IsFirstTimeRegistration"] = user_model.CountUsers(ctx, nil) == 0
+
 	oauth2Providers, err := oauth2.GetOAuth2Providers(ctx, optional.Some(true))
 	if err != nil {
 		ctx.ServerError("UserSignUp", err)

templates/post-install.tmpl

@@ -4,7 +4,7 @@
 		<!-- the "cup" has a handler, so move it a little leftward to make it visually in the center -->
 		<div class="tw-ml-[-30px]"><img width="160" src="{{AssetUrlPrefix}}/img/loading.png" alt aria-hidden="true"></div>
 		<div class="tw-my-[2em] tw-text-[18px]">
-			<a id="goto-user-login" href="{{AppSubUrl}}/user/login">{{ctx.Locale.Tr "install.installing_desc"}}</a>
+			<a id="goto-signup-or-signin" href="{{AppSubUrl}}{{if .IsAccountCreated}}/user/login{{else}}/user/sign_up{{end}}">{{ctx.Locale.Tr "install.installing_desc"}}</a>
 		</div>
 	</div>
 </div>

templates/user/auth/signup_inner.tmpl

@@ -7,6 +7,9 @@
 		{{end}}
 	</h4>
 	<div class="ui attached segment">
+		{{if .IsFirstTimeRegistration}}
+			<p>{{ctx.Locale.Tr "auth.sign_up_tip"}}</p>
+		{{end}}
 		<form class="ui form" action="{{.SignUpLink}}" method="post">
 			{{.CsrfTokenHtml}}
 			{{if or (not .LinkAccountMode) (and .LinkAccountMode .LinkAccountModeRegister)}}

web_src/js/features/install.ts

@@ -104,7 +104,7 @@ function initPreInstall() {
 }
 
 function initPostInstall() {
-  const el = document.querySelector('#goto-user-login');
+  const el = document.querySelector('#goto-signup-or-signin');
   if (!el) return;
 
   const targetUrl = el.getAttribute('href');