start work on supporting local copies of remote database

git-svn-id: svn://tug.org/texlive/trunk@11009 c570f23f-e606-0410-a88d-b1316a301751

1 files changed, 66 insertions, 0 deletions

diff --git a/Master/tlpkg/etc/tlmgr-use-saved-remote-tlpdb.patch b/Master/tlpkg/etc/tlmgr-use-saved-remote-tlpdb.patch
new file mode 100644
index 00000000000..4f52da053d5
--- /dev/null
+++ b/Master/tlpkg/etc/tlmgr-use-saved-remote-tlpdb.patch
@@ -0,0 +1,66 @@
+Index: tlmgr.pl
+===================================================================
+--- tlmgr.pl	(revision 11008)
++++ tlmgr.pl	(working copy)
+@@ -79,6 +79,7 @@
+ use Cwd qw/abs_path/;
+ use Pod::Usage;
+ use Getopt::Long qw(:config no_autoabbrev require_order);
++use Digest::MD5 qw(md5_hex);
+ use strict;
+ 
+ # used variables
+@@ -1864,14 +1865,52 @@
+ # uses the global $location.
+ #
+ sub init_tlmedia {
++  # compute the md5 digest for the location
++  my $locmdv = md5_hey($location);
+   if (($location =~ m/$TeXLiveServerURL/) ||
+       ($location =~ m/^ctan$/i)) {
+     $location = give_ctan_mirror();
+   }
+   info("tlmgr: installation location $location\n");
++  if ($location =~ m/^(http|ftp):/i) {
++    # try to download the md5hash from the location 
++    my $root = $localtlpdb->root;
++    my $temp = "$root/temp";
++    my $remotefilemdvfile = "$temp/md5.$locmdv";
++    my $remote_tlpdb_copy = "$root/$InfraLocation/texlive.tlpdb.$locmdv";
++    my $ret = TeXLive::TLUtils::download_file("$location/$InfraLocation/${DatabaseName}.md5", "$remotefilemdvfile");
++    if ($ret && (-r "$lzmafile")) {
++      # we found a md5 hash
++      # we have to check the md5hash against the md5 hash of the local file
++      my $local_digest = TeXLive::TLUtils::tlmd5("$remote_tlpdb_copy");
++      if (open (FOO, "<$remotefilemdvfile")) {
++        my $remote_digest = <FOO>;
++        close(FOO);
++        if ($remote_digest eq $local_digest) {
++          # that is fine, we have the same database, don't re-download it
++          $tlmediasrc = TeXLive::TLMedia->new($location, $remote_tlpdb_copy, "good");
++          die ("NOT KNOW WHY") unless defined($tlmediasrc);
++        }
++      } else {
++        debug("Cannot read md5 sum from downloaded file $remotefilemdvfile\n");
++        # we will read it again
++      }
++    } else {
++      tlwarn("We seem to be off line.\n");
++      if (-r "$remote_tlpdb_copy") {
++        tlwarn("Using local copy of remote database, installation may not succeed.\n");
++        $tlmediasrc = TeXLive::TLMedia->new($location, $remote_tlpdb_copy, "maybe_good");
++        die ("NOT KNOW WHY") unless defined($tlmediasrc);
++      } else {
++        # do nothing, we will try below to download the tlpdb ...
++      }
++    }
++  }
+   # $tlmediasrc is a global variable
+-  $tlmediasrc = TeXLive::TLMedia->new($location);
++  $tlmediasrc = TeXLive::TLMedia->new($location) unless defined($tlmediasrc);
+   die($loadmediasrcerror . $location) unless defined($tlmediasrc);
++  # save the md5hash of 
++  tlwarn("TODO TODO TODO ....");
+ }
+ 
+ #