texlive[53198] Master/install-tl: skip "import old settings" question

[commits+karl at tug.org]

Revision: 53198
          http://tug.org/svn/texlive?view=revision&revision=53198
Author:   karl
Date:     2019-12-21 00:55:46 +0100 (Sat, 21 Dec 2019)
Log Message:
-----------
skip "import old settings" question if
TEXLIVE_INSTALL_NO_IMPORT is set in the environment.

Modified Paths:
--------------
    trunk/Master/install-tl

Modified: trunk/Master/install-tl
===================================================================
--- trunk/Master/install-tl	2019-12-20 23:40:14 UTC (rev 53197)
+++ trunk/Master/install-tl	2019-12-20 23:55:46 UTC (rev 53198)
@@ -666,7 +666,7 @@
 
   # before we start the installation we check for the existence of
   # a previous installation, and in case we ship inform the UI
-  {
+  if (!exists $ENV{"TEXLIVE_INSTALL_NO_WELCOME"}) {
     my $tlmgrwhich = which("tlmgr");
     if ($tlmgrwhich) {
       my $dn = dirname($tlmgrwhich);
@@ -3143,6 +3143,11 @@
 
 Omit creating the ConTeXt cache.  This is useful for redistributors.
 
+=item C<TEXLIVE_INSTALL_NO_IMPORT>
+
+Omit check for installing on top of a previous installation and then
+asking about importing previous settings.
+
 =item C<TEXLIVE_INSTALL_NO_WELCOME>
 
 Omit printing the welcome message after successful installation, e.g.,