refactor, 'tmp_dir',... -> Runner class

the methods 'tmp_dir', 'tmp_work_dir' and 'tmp_cmdtest_dir'
are needed in 'cmdtest.rb' too, so moving them to the
Runner class.

bin/cmdtest.rb

@@ -263,6 +263,8 @@ module Cmdtest
 
     attr_reader :opts, :orig_cwd, :method_filter
 
+    ORIG_CWD = Dir.pwd
+
     def initialize(project_dir, incremental, opts)
       @project_dir = project_dir
       @opts = opts
@@ -281,6 +283,26 @@ module Cmdtest
       @project_dir.test_files_top
     end
 
+    #----------
+
+    def tmp_cmdtest_dir
+      File.join(ORIG_CWD, "tmp-cmdtest-%d" % [$cmdtest_level])
+    end
+
+    def tmp_dir
+      if ! @opts.slave
+        File.join(tmp_cmdtest_dir, "top")
+      else
+        File.join(tmp_cmdtest_dir, @opts.slave)
+      end
+    end
+
+    def tmp_work_dir
+      File.join(tmp_dir, "work")
+    end
+
+    #----------
+
     def run(clog)
       @orig_cwd = Dir.pwd
       ENV["PATH"] = Dir.pwd + _path_separator + ENV["PATH"]
@@ -410,6 +432,7 @@ module Cmdtest
       pr.add("",   "--xml",          "write summary on JUnit format", type: String, metavar: "FILE")
       pr.add("",   "--no-exit-code", "exit with 0 status even after errors")
       pr.add("-i", "--incremental",  "incremental mode")
+      pr.add("",   "--slave",        "run in slave mode", type: String)
       pr.addpos("arg", "testfile or pattern", nargs: 0..999)
       return pr.parse_args(ARGV, patterns: [], ruby_s: Util.windows?)
     end

lib/cmdtest/testcase.rb

@@ -70,7 +70,7 @@ module Cmdtest
       @_clog = clog
       @_runner = runner
       @_work_dir = Workdir.new(self, runner)
-      @_cwd = self.tmp_work_dir
+      @_cwd = @_runner.tmp_work_dir
       @_env = Hash.new
       @_in_cmd = false
       @_comment_str = nil
@@ -78,24 +78,6 @@ module Cmdtest
       @_t1 = @_t2 = 0
     end
 
-    #------------------------------
-
-    def tmp_cmdtest_dir
-      File.join(ORIG_CWD, "tmp-cmdtest-%d" % [$cmdtest_level])
-    end
-
-    def tmp_dir
-      if @_runner.opts.parallel == 1
-        File.join(tmp_cmdtest_dir, "top")
-      else
-        File.join(tmp_cmdtest_dir, @_test_method.as_filename)
-      end
-    end
-
-    def tmp_work_dir
-      File.join(tmp_dir, "work")
-    end
-
     #------------------------------
     # Import file into the "workdir" from the outside world.
     # The source is found relative to the current directory when "cmdtest"
@@ -788,7 +770,7 @@ module Cmdtest
     #------------------------------
 
     def _wait_for_new_second
-      Util.wait_for_new_second(tmp_dir, tmp_work_dir)
+      Util.wait_for_new_second(@_runner.tmp_dir, @_runner.tmp_work_dir)
     end
 
     #------------------------------

lib/cmdtest/workdir.rb

@@ -33,8 +33,8 @@ module Cmdtest
     def initialize(testcase, runner)
       @testcase = testcase
       @runner = runner
-      @path = @testcase.tmp_work_dir
-      @hardlinkdir = File.join(testcase.tmp_dir, "hardlinks")
+      @path = @runner.tmp_work_dir
+      @hardlinkdir = File.join(@runner.tmp_dir, "hardlinks")
       FileUtils.rm_rf(@path)
       FileUtils.rm_rf(@hardlinkdir)
       FileUtils.mkdir_p(@path)
@@ -64,7 +64,7 @@ module Cmdtest
     end
 
     def _tmp_redirect_sh
-      File.join(@testcase.tmp_dir,
+      File.join(@runner.tmp_dir,
                 Util.windows? ? "tmp-redirect.bat" : "tmp-redirect.sh")
     end
 
@@ -73,7 +73,7 @@ module Cmdtest
     end
 
     def _tmp_command_sh
-      File.join(@testcase.tmp_dir, _tmp_command_name)
+      File.join(@runner.tmp_dir, _tmp_command_name)
     end
 
     def _tmp_stdout_name
@@ -85,11 +85,11 @@ module Cmdtest
     end
 
     def _tmp_stdout_log
-      File.join(@testcase.tmp_dir, _tmp_stdout_name)
+      File.join(@runner.tmp_dir, _tmp_stdout_name)
     end
 
     def _tmp_stderr_log
-      File.join(@testcase.tmp_dir, _tmp_stderr_name)
+      File.join(@runner.tmp_dir, _tmp_stderr_name)
     end
 
     def _ENV_strs(env)