Git/Packet.pm: extract parts of t0021/rot13-filter.pl for reuse

And while at it let's simplify t0021/rot13-filter.pl by
using Git/Packet.pm.

This will make it possible to reuse packet related
functions in other test scripts.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 3 insertions, 137 deletions

diff --git a/t/t0021/rot13-filter.pl b/t/t0021/rot13-filter.pl
index f919d798a6..6fd7fa476b 100644
--- a/t/t0021/rot13-filter.pl
+++ b/t/t0021/rot13-filter.pl
@@ -30,9 +30,12 @@
 #     to the "list_available_blobs" response.
 #
 
+use 5.008;
+use lib (split(/:/, $ENV{GITPERLLIB}));
 use strict;
 use warnings;
 use IO::File;
+use Git::Packet;
 
 my $MAX_PACKET_CONTENT_SIZE = 65516;
 my $log_file                = shift @ARGV;
@@ -55,143 +58,6 @@ sub rot13 {
 	return $str;
 }
 
-sub packet_compare_lists {
-	my ($expect, @result) = @_;
-	my $ix;
-	if (scalar @$expect != scalar @result) {
-		return undef;
-	}
-	for ($ix = 0; $ix < $#result; $ix++) {
-		if ($expect->[$ix] ne $result[$ix]) {
-			return undef;
-		}
-	}
-	return 1;
-}
-
-sub packet_bin_read {
-	my $buffer;
-	my $bytes_read = read STDIN, $buffer, 4;
-	if ( $bytes_read == 0 ) {
-		# EOF - Git stopped talking to us!
-		return ( -1, "" );
-	} elsif ( $bytes_read != 4 ) {
-		die "invalid packet: '$buffer'";
-	}
-	my $pkt_size = hex($buffer);
-	if ( $pkt_size == 0 ) {
-		return ( 1, "" );
-	} elsif ( $pkt_size > 4 ) {
-		my $content_size = $pkt_size - 4;
-		$bytes_read = read STDIN, $buffer, $content_size;
-		if ( $bytes_read != $content_size ) {
-			die "invalid packet ($content_size bytes expected; $bytes_read bytes read)";
-		}
-		return ( 0, $buffer );
-	} else {
-		die "invalid packet size: $pkt_size";
-	}
-}
-
-sub remove_final_lf_or_die {
-	my $buf = shift;
-	unless ( $buf =~ s/\n$// ) {
-		die "A non-binary line MUST be terminated by an LF.\n"
-		    . "Received: '$buf'";
-	}
-	return $buf;
-}
-
-sub packet_txt_read {
-	my ( $res, $buf ) = packet_bin_read();
-	unless ( $res == -1 or $buf eq '' ) {
-		$buf = remove_final_lf_or_die($buf);
-	}
-	return ( $res, $buf );
-}
-
-sub packet_required_key_val_read {
-	my ( $key ) = @_;
-	my ( $res, $buf ) = packet_txt_read();
-	unless ( $res == -1 or ( $buf =~ s/^$key=// and $buf ne '' ) ) {
-		die "bad $key: '$buf'";
-	}
-	return ( $res, $buf );
-}
-
-sub packet_bin_write {
-	my $buf = shift;
-	print STDOUT sprintf( "%04x", length($buf) + 4 );
-	print STDOUT $buf;
-	STDOUT->flush();
-}
-
-sub packet_txt_write {
-	packet_bin_write( $_[0] . "\n" );
-}
-
-sub packet_flush {
-	print STDOUT sprintf( "%04x", 0 );
-	STDOUT->flush();
-}
-
-sub packet_initialize {
-	my ($name, $version) = @_;
-
-	packet_compare_lists([0, $name . "-client"], packet_txt_read()) ||
-		die "bad initialize";
-	packet_compare_lists([0, "version=" . $version], packet_txt_read()) ||
-		die "bad version";
-	packet_compare_lists([1, ""], packet_bin_read()) ||
-		die "bad version end";
-
-	packet_txt_write( $name . "-server" );
-	packet_txt_write( "version=" . $version );
-	packet_flush();
-}
-
-sub packet_read_capabilities {
-	my @cap;
-	while (1) {
-		my ( $res, $buf ) = packet_bin_read();
-		if ( $res == -1 ) {
-			die "unexpected EOF when reading capabilities";
-		}
-		return ( $res, @cap ) if ( $res != 0 );
-		$buf = remove_final_lf_or_die($buf);
-		unless ( $buf =~ s/capability=// ) {
-			die "bad capability buf: '$buf'";
-		}
-		push @cap, $buf;
-	}
-}
-
-# Read remote capabilities and check them against capabilities we require
-sub packet_read_and_check_capabilities {
-	my @required_caps = @_;
-	my ($res, @remote_caps) = packet_read_capabilities();
-	my %remote_caps = map { $_ => 1 } @remote_caps;
-	foreach (@required_caps) {
-		unless (exists($remote_caps{$_})) {
-			die "required '$_' capability not available from remote" ;
-		}
-	}
-	return %remote_caps;
-}
-
-# Check our capabilities we want to advertise against the remote ones
-# and then advertise our capabilities
-sub packet_check_and_write_capabilities {
-	my ($remote_caps, @our_caps) = @_;
-	foreach (@our_caps) {
-		unless (exists($remote_caps->{$_})) {
-			die "our capability '$_' is not available from remote"
-		}
-		packet_txt_write( "capability=" . $_ );
-	}
-	packet_flush();
-}
-
 print $debug "START\n";
 $debug->flush();