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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>
This commit is contained in:
Damien Diederen 2008-03-27 23:18:12 +01:00 committed by Junio C Hamano
parent dded801a7b
commit e78f69a3f2
1 changed files with 35 additions and 12 deletions
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47
git-cvsserver.perl
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@ -963,6 +963,17 @@ sub req_update
$meta = $updater->getmeta($filename);
}
# If -p was given, "print" the contents of the requested revision.
if ( exists ( $state->{opt}{p} ) ) {
if ( defined ( $meta->{revision} ) ) {
$log->info("Printing '$filename' revision " . $meta->{revision});
transmitfile($meta->{filehash}, { print => 1 });
}
next;
}
if ( ! defined $meta )
{
$meta = {
@ -1096,9 +1107,9 @@ sub req_update
my $file_local = $filepart . ".mine";
system("ln","-s",$state->{entries}{$filename}{modified_filename}, $file_local);
my $file_old = $filepart . "." . $oldmeta->{revision};
transmitfile($oldmeta->{filehash}, $file_old);
transmitfile($oldmeta->{filehash}, { targetfile => $file_old });
my $file_new = $filepart . "." . $meta->{revision};
transmitfile($meta->{filehash}, $file_new);
transmitfile($meta->{filehash}, { targetfile => $file_new });
# we need to merge with the local changes ( M=successful merge, C=conflict merge )
$log->info("Merging $file_local, $file_old, $file_new");
@ -1550,14 +1561,14 @@ sub req_diff
print "E File $filename at revision 1.$revision1 doesn't exist\n";
next;
}
transmitfile($meta1->{filehash}, $file1);
transmitfile($meta1->{filehash}, { targetfile => $file1 });
}
# otherwise we just use the working copy revision
else
{
( undef, $file1 ) = tempfile( DIR => $TEMP_DIR, OPEN => 0 );
$meta1 = $updater->getmeta($filename, $wrev);
transmitfile($meta1->{filehash}, $file1);
transmitfile($meta1->{filehash}, { targetfile => $file1 });
}
# if we have a second -r switch, use it too
@ -1572,7 +1583,7 @@ sub req_diff
next;
}
transmitfile($meta2->{filehash}, $file2);
transmitfile($meta2->{filehash}, { targetfile => $file2 });
}
# otherwise we just use the working copy
else
@ -1585,7 +1596,7 @@ sub req_diff
{
( undef, $file2 ) = tempfile( DIR => $TEMP_DIR, OPEN => 0 );
$meta2 = $updater->getmeta($filename, $wrev);
transmitfile($meta2->{filehash}, $file2);
transmitfile($meta2->{filehash}, { targetfile => $file2 });
}
# We need to have retrieved something useful
@ -2014,14 +2025,17 @@ sub revparse
return undef;
}
# This method takes a file hash and does a CVS "file transfer" which transmits the
# size of the file, and then the file contents.
# If a second argument $targetfile is given, the file is instead written out to
# a file by the name of $targetfile
# This method takes a file hash and does a CVS "file transfer". Its
# exact behaviour depends on a second, optional hash table argument:
# - If $options->{targetfile}, dump the contents to that file;
# - If $options->{print}, use M/MT to transmit the contents one line
# at a time;
# - Otherwise, transmit the size of the file, followed by the file
# contents.
sub transmitfile
{
my $filehash = shift;
my $targetfile = shift;
my $options = shift;
if ( defined ( $filehash ) and $filehash eq "deleted" )
{
@ -2043,11 +2057,20 @@ sub transmitfile
if ( open my $fh, '-|', "git-cat-file", "blob", $filehash )
{
if ( defined ( $targetfile ) )
if ( defined ( $options->{targetfile} ) )
{
my $targetfile = $options->{targetfile};
open NEWFILE, ">", $targetfile or die("Couldn't open '$targetfile' for writing : $!");
print NEWFILE $_ while ( <$fh> );
close NEWFILE or die("Failed to write '$targetfile': $!");
} elsif ( defined ( $options->{print} ) && $options->{print} ) {
while ( <$fh> ) {
if( /\n\z/ ) {
print 'M ', $_;
} else {
print 'MT text ', $_, "\n";
}
}
} else {
print "$size\n";
print while ( <$fh> );