cvsserver: Implement update -p (print to stdout)
Cvs update -p -r <rev> <path> is the documented way to retrieve a specific revision of a file (similar to git show <rev>:<path>). Without this patch, the -p flag is ignored and status output is produced, causing clients to interpret it as the contents of the file. TkCVS uses update -p as a basis for implementing its various "View" and "Diff" commands. Signed-off-by: Damien Diederen <dash@foobox.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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@ -963,6 +963,17 @@ sub req_update
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$meta = $updater->getmeta($filename);
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}
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# If -p was given, "print" the contents of the requested revision.
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if ( exists ( $state->{opt}{p} ) ) {
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if ( defined ( $meta->{revision} ) ) {
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$log->info("Printing '$filename' revision " . $meta->{revision});
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transmitfile($meta->{filehash}, { print => 1 });
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}
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next;
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}
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if ( ! defined $meta )
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{
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$meta = {
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@ -1096,9 +1107,9 @@ sub req_update
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my $file_local = $filepart . ".mine";
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system("ln","-s",$state->{entries}{$filename}{modified_filename}, $file_local);
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my $file_old = $filepart . "." . $oldmeta->{revision};
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transmitfile($oldmeta->{filehash}, $file_old);
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transmitfile($oldmeta->{filehash}, { targetfile => $file_old });
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my $file_new = $filepart . "." . $meta->{revision};
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transmitfile($meta->{filehash}, $file_new);
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transmitfile($meta->{filehash}, { targetfile => $file_new });
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# we need to merge with the local changes ( M=successful merge, C=conflict merge )
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$log->info("Merging $file_local, $file_old, $file_new");
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@ -1550,14 +1561,14 @@ sub req_diff
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print "E File $filename at revision 1.$revision1 doesn't exist\n";
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next;
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}
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transmitfile($meta1->{filehash}, $file1);
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transmitfile($meta1->{filehash}, { targetfile => $file1 });
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}
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# otherwise we just use the working copy revision
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else
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{
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( undef, $file1 ) = tempfile( DIR => $TEMP_DIR, OPEN => 0 );
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$meta1 = $updater->getmeta($filename, $wrev);
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transmitfile($meta1->{filehash}, $file1);
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transmitfile($meta1->{filehash}, { targetfile => $file1 });
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}
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# if we have a second -r switch, use it too
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@ -1572,7 +1583,7 @@ sub req_diff
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next;
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}
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transmitfile($meta2->{filehash}, $file2);
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transmitfile($meta2->{filehash}, { targetfile => $file2 });
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}
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# otherwise we just use the working copy
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else
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@ -1585,7 +1596,7 @@ sub req_diff
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{
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( undef, $file2 ) = tempfile( DIR => $TEMP_DIR, OPEN => 0 );
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$meta2 = $updater->getmeta($filename, $wrev);
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transmitfile($meta2->{filehash}, $file2);
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transmitfile($meta2->{filehash}, { targetfile => $file2 });
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}
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# We need to have retrieved something useful
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@ -2014,14 +2025,17 @@ sub revparse
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return undef;
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}
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# This method takes a file hash and does a CVS "file transfer" which transmits the
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# size of the file, and then the file contents.
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# If a second argument $targetfile is given, the file is instead written out to
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# a file by the name of $targetfile
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# This method takes a file hash and does a CVS "file transfer". Its
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# exact behaviour depends on a second, optional hash table argument:
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# - If $options->{targetfile}, dump the contents to that file;
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# - If $options->{print}, use M/MT to transmit the contents one line
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# at a time;
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# - Otherwise, transmit the size of the file, followed by the file
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# contents.
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sub transmitfile
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{
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my $filehash = shift;
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my $targetfile = shift;
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my $options = shift;
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if ( defined ( $filehash ) and $filehash eq "deleted" )
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{
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@ -2043,11 +2057,20 @@ sub transmitfile
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if ( open my $fh, '-|', "git-cat-file", "blob", $filehash )
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{
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if ( defined ( $targetfile ) )
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if ( defined ( $options->{targetfile} ) )
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{
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my $targetfile = $options->{targetfile};
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open NEWFILE, ">", $targetfile or die("Couldn't open '$targetfile' for writing : $!");
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print NEWFILE $_ while ( <$fh> );
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close NEWFILE or die("Failed to write '$targetfile': $!");
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} elsif ( defined ( $options->{print} ) && $options->{print} ) {
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while ( <$fh> ) {
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if( /\n\z/ ) {
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print 'M ', $_;
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} else {
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print 'MT text ', $_, "\n";
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}
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}
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} else {
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print "$size\n";
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print while ( <$fh> );
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