+# This tool is copyright (c) 2005, Matthias Urlichs.
+# It is released under the Gnu Public License, version 2.
+#
+# The basic idea is to aggregate CVS check-ins into related changes.
+# Fortunately, "cvsps" does that for us; all we have to do is to parse
+# its output.
+#
+# Checking out the files is done by a single long-running CVS connection
+# / server process.
+#
+# The head revision is on branch "origin" by default.
+# You can change that with the '-o' option.
+
+use strict;
+use warnings;
+use Getopt::Std;
+use File::Spec;
+use File::Temp qw(tempfile);
+use File::Path qw(mkpath);
+use File::Basename qw(basename dirname);
+use Time::Local;
+use IO::Socket;
+use IO::Pipe;
+use POSIX qw(strftime dup2);
+use IPC::Open2;
+
+$SIG{'PIPE'}="IGNORE";
+$ENV{'TZ'}="UTC";
+
+our($opt_h,$opt_o,$opt_v,$opt_k,$opt_u,$opt_d,$opt_p,$opt_C,$opt_z,$opt_i,$opt_s,$opt_m,$opt_M);
+
+sub usage() {
+ print STDERR <<END;
+Usage: ${\basename $0} # fetch/update GIT from CVS
+ [-o branch-for-HEAD] [-h] [-v] [-d CVSROOT]
+ [-p opts-for-cvsps] [-C GIT_repository] [-z fuzz]
+ [-i] [-k] [-u] [-s subst] [-m] [-M regex] [CVS_module]
+END
+ exit(1);
+}
+
+getopts("hivmkuo:d:p:C:z:s:M:") or usage();
+usage if $opt_h;
+
+@ARGV <= 1 or usage();
+
+if($opt_d) {
+ $ENV{"CVSROOT"} = $opt_d;
+} elsif(-f 'CVS/Root') {
+ open my $f, '<', 'CVS/Root' or die 'Failed to open CVS/Root';
+ $opt_d = <$f>;
+ chomp $opt_d;
+ close $f;
+ $ENV{"CVSROOT"} = $opt_d;
+} elsif($ENV{"CVSROOT"}) {
+ $opt_d = $ENV{"CVSROOT"};
+} else {
+ die "CVSROOT needs to be set";
+}
+$opt_o ||= "origin";
+$opt_s ||= "-";
+my $git_tree = $opt_C;
+$git_tree ||= ".";
+
+my $cvs_tree;
+if ($#ARGV == 0) {
+ $cvs_tree = $ARGV[0];
+} elsif (-f 'CVS/Repository') {
+ open my $f, '<', 'CVS/Repository' or
+ die 'Failed to open CVS/Repository';
+ $cvs_tree = <$f>;
+ chomp $cvs_tree;
+ close $f;
+} else {
+ usage();
+}
+
+our @mergerx = ();
+if ($opt_m) {
+ @mergerx = ( qr/\W(?:from|of|merge|merging|merged) (\w+)/i );
+}
+if ($opt_M) {
+ push (@mergerx, qr/$opt_M/);
+}
+
+select(STDERR); $|=1; select(STDOUT);
+
+
+package CVSconn;
+# Basic CVS dialog.
+# We're only interested in connecting and downloading, so ...
+
+use File::Spec;
+use File::Temp qw(tempfile);
+use POSIX qw(strftime dup2);
+
+sub new {
+ my($what,$repo,$subdir) = @_;
+ $what=ref($what) if ref($what);
+
+ my $self = {};
+ $self->{'buffer'} = "";
+ bless($self,$what);
+
+ $repo =~ s#/+$##;
+ $self->{'fullrep'} = $repo;
+ $self->conn();
+
+ $self->{'subdir'} = $subdir;
+ $self->{'lines'} = undef;
+
+ return $self;
+}
+
+sub conn {
+ my $self = shift;
+ my $repo = $self->{'fullrep'};
+ if($repo =~ s/^:pserver:(?:(.*?)(?::(.*?))?@)?([^:\/]*)(?::(\d*))?//) {
+ my($user,$pass,$serv,$port) = ($1,$2,$3,$4);
+ $user="anonymous" unless defined $user;
+ my $rr2 = "-";
+ unless($port) {
+ $rr2 = ":pserver:$user\@$serv:$repo";
+ $port=2401;
+ }
+ my $rr = ":pserver:$user\@$serv:$port$repo";
+
+ unless($pass) {
+ open(H,$ENV{'HOME'}."/.cvspass") and do {
+ # :pserver:cvs@mea.tmt.tele.fi:/cvsroot/zmailer Ah<Z
+ while(<H>) {
+ chomp;
+ s/^\/\d+\s+//;
+ my ($w,$p) = split(/\s/,$_,2);
+ if($w eq $rr or $w eq $rr2) {
+ $pass = $p;
+ last;
+ }
+ }
+ };
+ }
+ $pass="A" unless $pass;
+
+ my $s = IO::Socket::INET->new(PeerHost => $serv, PeerPort => $port);
+ die "Socket to $serv: $!\n" unless defined $s;
+ $s->write("BEGIN AUTH REQUEST\n$repo\n$user\n$pass\nEND AUTH REQUEST\n")
+ or die "Write to $serv: $!\n";
+ $s->flush();
+
+ my $rep = <$s>;
+
+ if($rep ne "I LOVE YOU\n") {
+ $rep="<unknown>" unless $rep;
+ die "AuthReply: $rep\n";
+ }
+ $self->{'socketo'} = $s;
+ $self->{'socketi'} = $s;
+ } else { # local or ext: Fork off our own cvs server.
+ my $pr = IO::Pipe->new();
+ my $pw = IO::Pipe->new();
+ my $pid = fork();
+ die "Fork: $!\n" unless defined $pid;
+ my $cvs = 'cvs';
+ $cvs = $ENV{CVS_SERVER} if exists $ENV{CVS_SERVER};
+ my $rsh = 'rsh';
+ $rsh = $ENV{CVS_RSH} if exists $ENV{CVS_RSH};
+
+ my @cvs = ($cvs, 'server');
+ my ($local, $user, $host);
+ $local = $repo =~ s/:local://;
+ if (!$local) {
+ $repo =~ s/:ext://;
+ $local = !($repo =~ s/^(?:([^\@:]+)\@)?([^:]+)://);
+ ($user, $host) = ($1, $2);
+ }
+ if (!$local) {
+ if ($user) {
+ unshift @cvs, $rsh, '-l', $user, $host;
+ } else {
+ unshift @cvs, $rsh, $host;
+ }
+ }
+
+ unless($pid) {
+ $pr->writer();
+ $pw->reader();
+ dup2($pw->fileno(),0);
+ dup2($pr->fileno(),1);
+ $pr->close();
+ $pw->close();
+ exec(@cvs);
+ }
+ $pw->writer();
+ $pr->reader();
+ $self->{'socketo'} = $pw;
+ $self->{'socketi'} = $pr;
+ }
+ $self->{'socketo'}->write("Root $repo\n");
+
+ # Trial and error says that this probably is the minimum set
+ $self->{'socketo'}->write("Valid-responses ok error Valid-requests Mode M Mbinary E Checked-in Created Updated Merged Removed\n");
+
+ $self->{'socketo'}->write("valid-requests\n");
+ $self->{'socketo'}->flush();
+
+ chomp(my $rep=$self->readline());
+ if($rep !~ s/^Valid-requests\s*//) {
+ $rep="<unknown>" unless $rep;
+ die "Expected Valid-requests from server, but got: $rep\n";
+ }
+ chomp(my $res=$self->readline());
+ die "validReply: $res\n" if $res ne "ok";
+
+ $self->{'socketo'}->write("UseUnchanged\n") if $rep =~ /\bUseUnchanged\b/;
+ $self->{'repo'} = $repo;
+}
+
+sub readline {
+ my($self) = @_;
+ return $self->{'socketi'}->getline();
+}
+
+sub _file {
+ # Request a file with a given revision.
+ # Trial and error says this is a good way to do it. :-/
+ my($self,$fn,$rev) = @_;
+ $self->{'socketo'}->write("Argument -N\n") or return undef;
+ $self->{'socketo'}->write("Argument -P\n") or return undef;
+ # -kk: Linus' version doesn't use it - defaults to off
+ if ($opt_k) {
+ $self->{'socketo'}->write("Argument -kk\n") or return undef;
+ }
+ $self->{'socketo'}->write("Argument -r\n") or return undef;
+ $self->{'socketo'}->write("Argument $rev\n") or return undef;
+ $self->{'socketo'}->write("Argument --\n") or return undef;
+ $self->{'socketo'}->write("Argument $self->{'subdir'}/$fn\n") or return undef;
+ $self->{'socketo'}->write("Directory .\n") or return undef;
+ $self->{'socketo'}->write("$self->{'repo'}\n") or return undef;
+ # $self->{'socketo'}->write("Sticky T1.0\n") or return undef;
+ $self->{'socketo'}->write("co\n") or return undef;
+ $self->{'socketo'}->flush() or return undef;
+ $self->{'lines'} = 0;
+ return 1;
+}
+sub _line {
+ # Read a line from the server.
+ # ... except that 'line' may be an entire file. ;-)
+ my($self, $fh) = @_;
+ die "Not in lines" unless defined $self->{'lines'};
+
+ my $line;
+ my $res=0;
+ while(defined($line = $self->readline())) {
+ # M U gnupg-cvs-rep/AUTHORS
+ # Updated gnupg-cvs-rep/
+ # /daten/src/rsync/gnupg-cvs-rep/AUTHORS
+ # /AUTHORS/1.1///T1.1
+ # u=rw,g=rw,o=rw
+ # 0
+ # ok
+
+ if($line =~ s/^(?:Created|Updated) //) {
+ $line = $self->readline(); # path
+ $line = $self->readline(); # Entries line
+ my $mode = $self->readline(); chomp $mode;
+ $self->{'mode'} = $mode;
+ defined (my $cnt = $self->readline())
+ or die "EOF from server after 'Changed'\n";
+ chomp $cnt;
+ die "Duh: Filesize $cnt" if $cnt !~ /^\d+$/;
+ $line="";
+ $res=0;
+ while($cnt) {
+ my $buf;
+ my $num = $self->{'socketi'}->read($buf,$cnt);
+ die "Server: Filesize $cnt: $num: $!\n" if not defined $num or $num<=0;
+ print $fh $buf;
+ $res += $num;
+ $cnt -= $num;
+ }
+ } elsif($line =~ s/^ //) {
+ print $fh $line;
+ $res += length($line);
+ } elsif($line =~ /^M\b/) {
+ # output, do nothing
+ } elsif($line =~ /^Mbinary\b/) {
+ my $cnt;
+ die "EOF from server after 'Mbinary'" unless defined ($cnt = $self->readline());
+ chomp $cnt;
+ die "Duh: Mbinary $cnt" if $cnt !~ /^\d+$/ or $cnt<1;
+ $line="";
+ while($cnt) {
+ my $buf;
+ my $num = $self->{'socketi'}->read($buf,$cnt);
+ die "S: Mbinary $cnt: $num: $!\n" if not defined $num or $num<=0;
+ print $fh $buf;
+ $res += $num;
+ $cnt -= $num;
+ }
+ } else {
+ chomp $line;
+ if($line eq "ok") {
+ # print STDERR "S: ok (".length($res).")\n";
+ return $res;
+ } elsif($line =~ s/^E //) {
+ # print STDERR "S: $line\n";
+ } elsif($line =~ /^Remove-entry /i) {
+ $line = $self->readline(); # filename
+ $line = $self->readline(); # OK
+ chomp $line;
+ die "Unknown: $line" if $line ne "ok";
+ return -1;
+ } else {
+ die "Unknown: $line\n";
+ }
+ }
+ }
+}
+sub file {
+ my($self,$fn,$rev) = @_;
+ my $res;
+
+ my ($fh, $name) = tempfile('gitcvs.XXXXXX',
+ DIR => File::Spec->tmpdir(), UNLINK => 1);
+
+ $self->_file($fn,$rev) and $res = $self->_line($fh);
+
+ if (!defined $res) {
+ # retry
+ $self->conn();
+ $self->_file($fn,$rev)
+ or die "No file command send\n";
+ $res = $self->_line($fh);
+ die "No input: $fn $rev\n" unless defined $res;
+ }
+ close ($fh);
+
+ return ($name, $res);