[PATCH v2 5/7] 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>
---
git-cvsserver.perl | 47 +++++++++++++++++++++++++++++++++++------------
1 files changed, 35 insertions(+), 12 deletions(-)
Show changes to git-cvsserver.perl +35 −12
diff --git a/git-cvsserver.perl b/git-cvsserver.perl
index 89a4dac..49c0ba2 100755
--- a/git-cvsserver.perl
+++ b/git-cvsserver.perl
@@ -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> );
--
1.5.5.rc1.19.gfe7681
Damien Diederen
