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Allow more than one repository in the tlpdb/option-location field
The format is:
	repo1[#tag] repo2[#tag] ...
the tags are optional.
This patch only adds support for a new action "repository" that lists,
adds, removes, sets repositories according to this format.
It does not change tlmgr to allow actually working with it.
---
 texmf/scripts/texlive/tlmgr.pl |   99 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 99 insertions(+)

Index: Master/texmf/scripts/texlive/tlmgr.pl
===================================================================
--- Master.orig/texmf/scripts/texlive/tlmgr.pl	2010-05-02 01:31:56.000000000 +0900
+++ Master/texmf/scripts/texlive/tlmgr.pl	2010-05-02 01:32:12.000000000 +0900
@@ -455,6 +455,9 @@
   } elsif ($action =~ m/^option$/i) {
     action_option();
     finish(0);
+  } elsif ($action =~ m/^repository$/i) {
+    action_repository();
+    finish(0);
   } elsif ($action =~ m/^list$/i) {
     action_list();
     finish(0);
@@ -2839,6 +2842,102 @@
   return;
 }
 
+#  REPOSITORY
+#
+# this action manages the list of repositories
+# tlmgr repository list               -> lists repositories
+# tlmgr repository add path [tag]     -> add repository with optional tag
+# tlmgr repository remove [path|tag]  -> removes repository or tag
+# tlmgr repository set path[#tag] [path[#tag] ...] -> sets the list
+#
+
+sub array_to_repository {
+  my %r = @_;
+  my @ret;
+  for my $k (keys %r) {
+    my $v = $r{$k};
+    if ($k eq $v) {
+      push @ret, $k;
+    } else {
+      push @ret, "$v#$k";
+    }
+  }
+  return "@ret";
+}
+sub repository_to_array {
+  my $r = shift;
+  my %r;
+  for my $rr (split ' ', $r) {
+    if ($rr =~ m/^([^#]+)#(.*)$/) {
+      $r{$2} = $1;
+    } else {
+      $r{$rr} = $rr;
+    }
+  }
+  return %r;
+}
+sub action_repository {
+  init_local_db();
+  my $what = shift @ARGV;
+  my %repos = repository_to_array($localtlpdb->option("location"));
+  if ($what =~ m/^list$/i) {
+    print "List of repositories (with tags if set):\n";
+    for my $k (keys %repos) {
+      my $v = $repos{$k};
+      print "\t$v";
+      if ($k ne $v) {
+        print " ($k)";
+      }
+      print "\n";
+    }
+    return;
+  }
+  if ($what eq "add") {
+    my $p = shift @ARGV;
+    if (!defined($p)) {
+      tlwarn("You need to give a new repository aas argument to add\n");
+      return;
+    }
+    my $t = shift @ARGV;
+    $t = $p if (!defined($t));
+    if (defined($repos{$t})) {
+      tlwarn("This repository or its tag is already defined, no action\n");
+      return;
+    }
+    # TODO more checks needed?
+    $repos{$t} = $p;
+    $localtlpdb->option("location", array_to_repository(%repos));
+    $localtlpdb->save;
+    return;
+  }
+  if ($what eq "remove") {
+    my $p = shift @ARGV;
+    if (!defined($p)) {
+      tlwarn("Which repository should be removed?\n");
+      return;
+    }
+    my $found = 0;
+    for my $k (keys %repos) {
+      if ($k eq $p || $repos{$k} eq $p) {
+        $found = 1;
+        delete $repos{$k};
+      }
+    }
+    if (!$found) {
+      tlwarn("Cannot find the repository $p\n");
+    } else {
+      $localtlpdb->option("location", array_to_repository(%repos));
+      $localtlpdb->save;
+    }
+    return;
+  }
+  if ($what eq "set") {
+    %repos = repository_to_array("@ARGV");
+    $localtlpdb->option("location", array_to_repository(%repos));
+    $localtlpdb->save;
+  }
+}
+
 
 #  OPTION
 #