refactor: make the settings alone responsible for ssh server location

src/main/scala/gitbucket/core/controller/ControllerBase.scala

@@ -184,10 +184,7 @@ case class Context(settings: SystemSettingsService.SystemSettings, loginAccount:
   val currentPath = request.getRequestURI.substring(request.getContextPath.length)
   val baseUrl = settings.baseUrl(request)
   val host = new java.net.URL(baseUrl).getHost
-  val repoBase = RepoBase(
-    baseUrl,
-    if (settings.ssh) Some(SshAddress(host, settings.sshPortOrDefault)) else None
- )
+  val repoBase = RepoBase(baseUrl, settings.sshAddress)
   val platform = request.getHeader("User-Agent") match {
     case null => null
     case agent if agent.contains("Mac") => "mac"

src/main/scala/gitbucket/core/controller/SystemSettingsController.scala

@@ -68,16 +68,13 @@ trait SystemSettingsControllerBase extends ControllerBase {
   post("/admin/system", form)(adminOnly { form =>
     saveSystemSettings(form)
 
-    if(form.ssh && SshServer.isActive && context.settings.sshPort != form.sshPort){
-      SshServer.stop()
-    }
-
-    if(form.ssh && !SshServer.isActive && form.baseUrl.isDefined){
-      SshServer.start(
-        form.sshPortOrDefault,
-        form.baseUrl.get)
-    } else if(!form.ssh && SshServer.isActive){
+    if (form.sshAddress != context.settings.sshAddress) {
       SshServer.stop()
+       for {
+         sshAddress <- form.sshAddress
+         baseUrl    <- form.baseUrl
+       }
+       SshServer.start(sshAddress, baseUrl)
     }
 
     flash += "info" -> "System settings has been updated."

src/main/scala/gitbucket/core/service/SystemSettingsService.scala

@@ -1,6 +1,6 @@
 package gitbucket.core.service
 
-import gitbucket.core.util.{Directory, ControlUtil}
+import gitbucket.core.util.{Directory, ControlUtil, SshAddress}
 import gitbucket.core.util.Implicits._
 import Directory._
 import ControlUtil._
@@ -133,7 +133,21 @@ object SystemSettingsService {
     ldapAuthentication: Boolean,
     ldap: Option[Ldap]){
     def baseUrl(request: HttpServletRequest): String = baseUrl.fold(request.baseUrl)(_.stripSuffix("/"))
-    def sshPortOrDefault:Int = sshPort.getOrElse(DefaultSshPort)
+
+    def sshAddress:Option[SshAddress] =
+      for {
+      	host <- sshHostFromBaseUrl
+        if ssh
+      }
+      yield SshAddress(host, sshPort.getOrElse(DefaultSshPort))
+
+    // TODO host should be configured separately
+    private def sshHostFromBaseUrl:Option[String] =
+      for {
+        baseUrl <- baseUrl
+        m       <- """^https?://([^:/]+)""".r.findFirstMatchIn(baseUrl)
+      }
+      yield m.group(1)
   }
 
   case class Ldap(

src/main/scala/gitbucket/core/ssh/NoShell.scala

@@ -1,12 +1,13 @@
 package gitbucket.core.ssh
 
 import gitbucket.core.service.SystemSettingsService
+import gitbucket.core.util.SshAddress
 import org.apache.sshd.common.Factory
 import org.apache.sshd.server.{Environment, ExitCallback, Command}
 import java.io.{OutputStream, InputStream}
 import org.eclipse.jgit.lib.Constants
 
-class NoShell extends Factory[Command] with SystemSettingsService {
+class NoShell(sshAddress:SshAddress) extends Factory[Command] {
   override def create(): Command = new Command() {
     private var in: InputStream = null
     private var out: OutputStream = null
@@ -15,7 +16,6 @@ class NoShell extends Factory[Command] with SystemSettingsService {
 
     override def start(env: Environment): Unit = {
       val user = env.getEnv.get("USER")
-      val port = loadSystemSettings().sshPortOrDefault
       val message =
         """
           | Welcome to
@@ -31,8 +31,8 @@ class NoShell extends Factory[Command] with SystemSettingsService {
           |
           | Please use:
           |
-          | git clone ssh://%s@GITBUCKET_HOST:%d/OWNER/REPOSITORY_NAME.git
-        """.stripMargin.format(user, port).replace("\n", "\r\n") + "\r\n"
+          | git clone ssh://%s@%s:%d/OWNER/REPOSITORY_NAME.git
+        """.stripMargin.format(user, sshAddress.host, sshAddress.port).replace("\n", "\r\n") + "\r\n"
       err.write(Constants.encode(message))
       err.flush()
       in.close()

src/main/scala/gitbucket/core/ssh/SshServerListener.scala

@@ -5,7 +5,7 @@ import java.util.concurrent.atomic.AtomicBoolean
 import javax.servlet.{ServletContextEvent, ServletContextListener}
 
 import gitbucket.core.service.SystemSettingsService
-import gitbucket.core.util.Directory
+import gitbucket.core.util.{Directory, SshAddress}
 import org.apache.sshd.server.keyprovider.SimpleGeneratorHostKeyProvider
 import org.slf4j.LoggerFactory
 
@@ -14,20 +14,20 @@ object SshServer {
   private val server = org.apache.sshd.server.SshServer.setUpDefaultServer()
   private val active = new AtomicBoolean(false)
 
-  private def configure(port: Int, baseUrl: String) = {
-    server.setPort(port)
+  private def configure(sshAddress: SshAddress, baseUrl: String) = {
+    server.setPort(sshAddress.port)
     val provider = new SimpleGeneratorHostKeyProvider(new File(s"${Directory.GitBucketHome}/gitbucket.ser"))
     provider.setAlgorithm("RSA")
     provider.setOverwriteAllowed(false)
     server.setKeyPairProvider(provider)
     server.setPublickeyAuthenticator(new PublicKeyAuthenticator)
     server.setCommandFactory(new GitCommandFactory(baseUrl))
-    server.setShellFactory(new NoShell)
+    server.setShellFactory(new NoShell(sshAddress))
   }
 
-  def start(port: Int, baseUrl: String) = {
+  def start(sshAddress: SshAddress, baseUrl: String) = {
     if(active.compareAndSet(false, true)){
-      configure(port, baseUrl)
+      configure(sshAddress, baseUrl)
       server.start()
       logger.info(s"Start SSH Server Listen on ${server.getPort}")
     }
@@ -55,20 +55,18 @@ class SshServerListener extends ServletContextListener with SystemSettingsServic
 
   override def contextInitialized(sce: ServletContextEvent): Unit = {
     val settings = loadSystemSettings()
-    if(settings.ssh){
-      settings.baseUrl match {
-        case None =>
-          logger.error("Could not start SshServer because the baseUrl is not configured.")
-        case Some(baseUrl) =>
-          SshServer.start(settings.sshPortOrDefault, baseUrl)
-      }
+    if (settings.sshAddress.isDefined && settings.baseUrl.isEmpty) {
+    	logger.error("Could not start SshServer because the baseUrl is not configured.")
     }
+    for {
+      sshAddress <- settings.sshAddress
+      baseUrl    <- settings.baseUrl
+    }
+    SshServer.start(sshAddress, baseUrl)
   }
 
   override def contextDestroyed(sce: ServletContextEvent): Unit = {
-    if(loadSystemSettings().ssh){
-      SshServer.stop()
-    }
+    SshServer.stop()
   }
 
 }