1 files changed, 15 insertions, 7 deletions
diff --git a/Master/bin/win32/runscript.tlu b/Master/bin/win32/runscript.tlu
index c931d9c5420..58d5e7c0bc8 100755
--- a/Master/bin/win32/runscript.tlu
+++ b/Master/bin/win32/runscript.tlu
@@ -860,15 +860,15 @@ if not ARGV then
   local ext = string.match(string.lower(progfullname), '%.[^\\/.]*$') or ''
   if (ext == '.lua') or (ext == '.tlu') or (ext == '.texlua') then -- lua script
     arg[0] = progfullname
-  elseif (ext == '.tcl' and guimode) then -- tcl script; use built-in tclkit?
+  elseif (ext == '.tcl' and guimode) then -- tcl script; use built-in tcl/tk?
     local try_extern_tcl =
         (kpse.var_value('TEXLIVE_WINDOWS_TRY_EXTERNAL_TCL') == '1') and
         not is_restricted_progname
     local TCLEXENAME, TCLEXE
     if try_extern_tcl then
-      TCLEXENAME, TCLEXE = check_command(extension_map['.tcl'][1], PATH)
+      TCLEXE, TCLEXENAME = check_command(extension_map['.tcl'][1], PATH)
     end
-    if try_extern_tcl and not TCLEXENAME then
+    if try_extern_tcl and not TCLEXE then
       local exttcl_warn = [[
 External Tcl missing or outdated. Please install a recent Tcl, or configure
 TeX Live to always use the builtin Tcl for gui scripts:
@@ -879,9 +879,17 @@ Meanwhile, continuing with built-in Tcl...
     else -- did find something
       ARGV = {[0]=TCLEXE, TCLEXENAME}
     end
-    if not TCLEXENAME then
-      ARGV = {[0]=TEXDIR..'/tlpkg/tltcl/tclkit.exe', 'tclkit.exe'}
-      PATH = prepend_path(PATH, TEXDIR:gsub('/','\\')..'\\tlpkg\\tltcl')
+    if not TCLEXE then
+      -- kit: tlpkg/tltcl/tclkit.exe
+      -- regular wish: tlpkg/tltcl/bin/wish.exe
+      -- we ignore the fact that a non-kit tcl/tk provides wish AND tclsh
+      if lfs.isfile(TEXDIR..'/tlpkg/tltcl/tclkit.exe') then
+        ARGV = {[0]=TEXDIR..'/tlpkg/tltcl/tclkit.exe', 'tclkit.exe'}
+        PATH = prepend_path(PATH, TEXDIR:gsub('/','\\')..'\\tlpkg\\tltcl')
+      elseif lfs.isfile(TEXDIR..'/tlpkg/tltcl/bin/wish.exe') then
+        ARGV = {[0]=TEXDIR..'/tlpkg/tltcl/bin/wish.exe', 'wish.exe'}
+        PATH = prepend_path(PATH, TEXDIR:gsub('/','\\')..'\\tlpkg\\tltcl\\bin')
+      end
     end
     table.insert(ARGV, _q(progfullname:gsub('/','\\')))
     if (argline and argline ~= '') then argline = '-- '..argline end
@@ -901,7 +909,7 @@ end
 if ARGV then
   table.insert(ARGV, argline) -- pass through original arguments
   if string.find (table.concat(ARGV, ' '), 'perl.exe') and extperl_warn then
-
+  
     show_error(extperl_warn)
   end
   local ret = assert(os.spawn(ARGV))