add -show-url option for ui command (#11213)

Author: yaroot

.changelog/11213.txt

@@ -0,0 +1,3 @@
+```release-note:improvement
+cli: Add `-show-url` option for the `nomad ui` command.
+```

command/ui.go

@@ -35,6 +35,8 @@ UI Options
 
   -authenticate: Exchange your Nomad ACL token for a one-time token in the
     web UI, if ACLs are enabled.
+
+  -show-url: Show the Nomad UI URL instead of opening with the default browser.
 `
 
 	return strings.TrimSpace(helpText)
@@ -82,10 +84,12 @@ func (c *UiCommand) Name() string { return "ui" }
 
 func (c *UiCommand) Run(args []string) int {
 	var authenticate bool
+	var showUrl bool
 
 	flags := c.Meta.FlagSet(c.Name(), FlagSetClient)
 	flags.Usage = func() { c.Ui.Output(c.Help()) }
 	flags.BoolVar(&authenticate, "authenticate", false, "")
+	flags.BoolVar(&showUrl, "show-url", false, "")
 
 	if err := flags.Parse(args); err != nil {
 		return 1
@@ -178,17 +182,24 @@ func (c *UiCommand) Run(args []string) int {
 		}
 	}
 
+	var output string
 	if authenticate && ottSecret != "" {
-		c.Ui.Output(fmt.Sprintf("Opening URL %q with one-time token", url.String()))
+		output = fmt.Sprintf("Opening URL %q with one-time token", url.String())
 		url.RawQuery = fmt.Sprintf("ott=%s", ottSecret)
 	} else {
-		c.Ui.Output(fmt.Sprintf("Opening URL %q", url.String()))
+		output = fmt.Sprintf("Opening URL %q", url.String())
+	}
+
+	if showUrl {
+		c.Ui.Output(fmt.Sprintf("URL for web UI: %s", url.String()))
+		return 0
 	}
+
+	c.Ui.Output(output)
 	if err := open.Start(url.String()); err != nil {
 		c.Ui.Error(fmt.Sprintf("Error opening URL: %s", err))
 		return 1
 	}
-
 	return 0
 }
 

website/content/docs/commands/ui.mdx

@@ -36,6 +36,8 @@ storage for authentication.
 - `-authenticate`: Exchange your Nomad ACL token for a one-time token in the
   web UI.
 
+- `-show-url`: Show the Nomad UI URL instead of opening with the default browser.
+
 ## Examples
 
 Open the UI homepage:
@@ -65,3 +67,10 @@ Open the UI and authenticate using your ACL token:
 $ NOMAD_ACL_TOKEN=e9674b26-763b-4637-a28f-0df95c53cdda nomad ui -authenticate
 Opening URL "http://127.0.0.1:4646" with token
 ```
+
+Show the UI URL without opening the browser:
+
+```shell-session
+$ nomad ui -show-url
+URL for web UI: http://127.0.0.1:4646
+```