feat: add server id to login command

this allows scripting the login without the modal prompt

Author: tim-goto

general/login/login.go

@@ -15,13 +15,22 @@ const (
 )
 
 type LoginCommand struct {
+	serverId string
 }
 
 func NewLoginCommand() *LoginCommand {
 	return &LoginCommand{}
 }
 
+func (lc *LoginCommand) SetServerId(serverId string) *LoginCommand {
+	lc.serverId = serverId
+	return lc
+}
+
 func (lc *LoginCommand) Run() error {
+	if lc.serverId != "" {
+		return existingServerLogin(lc.serverId)
+	}
 	configurations, err := config.GetAllServersConfigs()
 	if err != nil {
 		return err

general/login/login_test.go

@@ -0,0 +1,35 @@
+package login
+
+import (
+	"testing"
+
+	"github.com/jfrog/jfrog-cli-core/v2/utils/config"
+	utilsTests "github.com/jfrog/jfrog-cli-core/v2/utils/tests"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestSetServerId(t *testing.T) {
+	lc := NewLoginCommand()
+	result := lc.SetServerId("my-server")
+	assert.Equal(t, "my-server", lc.serverId)
+	// Verify fluent API returns the same instance
+	assert.Same(t, lc, result)
+}
+
+func TestRunWithNonExistentServerId(t *testing.T) {
+	cleanUp, err := utilsTests.SetJfrogHome()
+	require.NoError(t, err)
+	defer cleanUp()
+
+	// At least one server must exist so GetConfig actually looks up by ID
+	err = config.SaveServersConf([]*config.ServerDetails{
+		{ServerId: "other-server", Url: "https://example.jfrog.io/"},
+	})
+	require.NoError(t, err)
+
+	lc := NewLoginCommand().SetServerId("non-existent-server")
+	err = lc.Run()
+	assert.ErrorContains(t, err, "non-existent-server")
+}
+