Merge branch '1.1.x' into merge-1.1.x-into-1.x

* 1.1.x:
  Update mimaPreviousArtifacts/sbt.version
  Introduce SBT_GLOBAL_SERVER_DIR env var to override too long paths
  Handle very long socket file paths on UNIX

Conflicts:
	project/build.properties

build.sbt

@@ -77,7 +77,10 @@ def testedBaseSettings: Seq[Setting[_]] =
 
 val mimaSettings = Def settings (
   mimaPreviousArtifacts := {
-    ((0 to 4).map(v => s"1.0.$v") ++ (0 to 0).map(v => s"1.1.$v")).map{ v =>
+    Seq(
+      "1.0.0", "1.0.1", "1.0.2", "1.0.3", "1.0.4",
+      "1.1.0", "1.1.1",
+    ).map { v =>
       organization.value % moduleName.value % v cross (if (crossPaths.value) CrossVersion.binary else CrossVersion.disabled)
     }.toSet
   }

main-command/src/main/scala/sbt/internal/server/Server.scala

@@ -60,9 +60,16 @@ private[sbt] object Server {
                 // Named pipe already has an exclusive lock.
                 addServerError(new Win32NamedPipeServerSocket(pipeName))
               case ConnectionType.Local =>
-                tryClient(new UnixDomainSocket(socketfile.getAbsolutePath))
+                val maxSocketLength = new UnixDomainSocketLibrary.SockaddrUn().sunPath.length - 1
+                val path = socketfile.getAbsolutePath
+                if (path.length > maxSocketLength)
+                  sys.error("socket file absolute path too long; " +
+                      "either switch to another connection type " +
+                      "or define a short \"SBT_GLOBAL_SERVER_DIR\" value. " +
+                      s"Current path: ${path}")
+                tryClient(new UnixDomainSocket(path))
                 prepareSocketfile()
-                addServerError(new UnixDomainServerSocket(socketfile.getAbsolutePath))
+                addServerError(new UnixDomainServerSocket(path))
               case ConnectionType.Tcp =>
                 tryClient(new Socket(InetAddress.getByName(host), port))
                 addServerError(new ServerSocket(port, 50, InetAddress.getByName(host)))

main/src/main/scala/sbt/internal/CommandExchange.scala

@@ -120,8 +120,10 @@ private[sbt] final class CommandExchange {
     if (server.isEmpty && firstInstance.get) {
       val portfile = s.baseDir / "project" / "target" / "active.json"
       val h = Hash.halfHashString(IO.toURI(portfile).toString)
-      val tokenfile = BuildPaths.getGlobalBase(s) / "server" / h / "token.json"
-      val socketfile = BuildPaths.getGlobalBase(s) / "server" / h / "sock"
+      val serverDir =
+        sys.env get "SBT_GLOBAL_SERVER_DIR" map file getOrElse BuildPaths.getGlobalBase(s) / "server"
+      val tokenfile = serverDir / h / "token.json"
+      val socketfile = serverDir / h / "sock"
       val pipeName = "sbt-server-" + h
       val connection = ServerConnection(
         connectionType,

project/build.properties

@@ -1 +1 @@
-sbt.version=1.1.0
+sbt.version=1.1.1