tlmgr option autobackup:

- warn if value is out of supported range
- support using "infty" instead of -1 to trick GetOpt parser
- document problem with -1 parsing as option and suggest -- or infty


git-svn-id: svn://tug.org/texlive/trunk@12935 c570f23f-e606-0410-a88d-b1316a301751

1 files changed, 41 insertions, 0 deletions

diff --git a/Master/texmf/scripts/texlive/tlmgr.pl b/Master/texmf/scripts/texlive/tlmgr.pl
index ca00d7c8740..9afccb86c7c 100755
--- a/Master/texmf/scripts/texlive/tlmgr.pl
+++ b/Master/texmf/scripts/texlive/tlmgr.pl
@@ -2009,6 +2009,34 @@ sub action_option {
     } else {
       info("Option $what = ", $localtlpdb->option($what), "\n");
     }
+  } elsif ($what =~ m/^autobackup$/i) {
+    my $val = shift @ARGV;
+    if (defined($val)) {
+      if ($val =~ m/-?[0-9]+/) {
+        if ($val < -1) {
+          tlwarn "Value $val for autobackup not supported, must be >= -1\n";
+          return;
+        }
+      } elsif ($val =~ m/^infty$/i) {
+        $val = -1;
+      } else {
+        tlwarn "Value $val for autobackup not supported, must be >= -1\n";
+        return;
+      }
+      info("tlmgr: setting option $what to $val");
+      $localtlpdb->option($what,$val);
+      $localtlpdb->save;
+    } else {
+      $val = $localtlpdb->option($what);
+      info("Option $what = $val");
+    }
+    if ($val == -1) {
+      info(" (make and keep infinitely many backups)\n");
+    } elsif ($val == 0) {
+      info(" (don't keep any backups)\n");
+    } else {
+      info(" (make and keep $val backups)\n");
+    }
   } elsif (member($what, @AllowedConfigOptions)) {
     # for all further options not handled above, we check whether they
     # appear in the list of allowed options; if they do, we set/read
@@ -3146,6 +3174,19 @@ will not be removed by default.  If C<autobackup> is 0 or positive, it
 specifies the number of backups to be kept.  Thus, backups are disabled
 with 0 as the values.
 
+B<Warning:> If you want to set the optin C<autobackup> on the command line
+it might be interpreted as an option. In this case you have to use
+
+  tlmgr option -- autobackup -1
+
+The C<--> makes tlmgr stop parsing for options at that place.
+
+Alternatively, you can ue C<infty> instead of C<-1>, so the above is
+equivalent to
+
+  tlmgr option autobackup infty
+
+
 In the C<--clean> mode of the C<backup> action this option also
 specifies the number to be kept.