[PATCH] Add -k kill keyword expansion option to git-cvsimport - revised

Early versions of git-cvsimport defaulted to using preexisting keyword
expansion settings. This change preserves compatibility with existing cvs
imports and allows new repository migrations to kill keyword expansion.

After exploration of the different -k modes in the cvs protocol, we use -kk
which kills keyword expansion wherever possible. Against the protocol
spec, -ko and -kb will sometimes expand keywords.

Should improve our chances of detecting merges and reduce imported
repository size.

Signed-off: Martin Langhoff <martin.langhoff@gmail.com>
Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/Documentation/git-cvsimport-script.txt b/Documentation/git-cvsimport-script.txt
index 07b288f..61713d8 100644 (file)
--- a/Documentation/git-cvsimport-script.txt
+++ b/Documentation/git-cvsimport-script.txt
@@ -11,7 +11,7 @@ SYNOPSIS
 --------
 'git-cvsimport-script' [ -o <branch-for-HEAD> ] [ -h ] [ -v ]
                        [ -d <CVSROOT> ] [ -p <options-for-cvsps> ]
-                       [ -C <GIT_repository> ] [ -i ] [ <CVS_module> ]
+                       [ -C <GIT_repository> ] [ -i ] [ -k ] [ <CVS_module> ]
 
 
 DESCRIPTION
@@ -38,6 +38,11 @@ OPTIONS
        ensures the working directory and cache remain untouched and will
        not create them if they do not exist.
 
+-k::
+       Kill keywords: will extract files with -kk from the CVS archive
+       to avoid noisy changesets. Highly recommended, but off by default
+       to preserve compatibility with early imported trees. 
+
 -o <branch-for-HEAD>::
        The 'HEAD' branch from CVS is imported to the 'origin' branch within
        the git repository, as 'HEAD' already has a special meaning for git.

diff --git a/git-cvsimport-script b/git-cvsimport-script
index a389f48..a6a6f0d 100755 (executable)
--- a/git-cvsimport-script
+++ b/git-cvsimport-script
@@ -28,19 +28,19 @@ use POSIX qw(strftime dup2);
 $SIG{'PIPE'}="IGNORE";
 $ENV{'TZ'}="UTC";
 
-our($opt_h,$opt_o,$opt_v,$opt_d,$opt_p,$opt_C,$opt_z,$opt_i);
+our($opt_h,$opt_o,$opt_v,$opt_k,$opt_d,$opt_p,$opt_C,$opt_z,$opt_i);
 
 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 ] [ CVS_module ]
+       [ -i ] [ -k ] [ CVS_module ]
 END
        exit(1);
 }
 
-getopts("hivo:d:p:C:z:") or usage();
+getopts("hivko:d:p:C:z:") or usage();
 usage if $opt_h;
 
 @ARGV <= 1 or usage();
@@ -218,8 +218,10 @@ sub _file {
        my($self,$fn,$rev) = @_;
        $self->{'socketo'}->write("Argument -N\n") or return undef;
        $self->{'socketo'}->write("Argument -P\n") or return undef;
-       # $self->{'socketo'}->write("Argument -ko\n") or return undef;
-       # -ko: Linus' version doesn't use it
+       # -kk: Linus' version doesn't use it - defaults to off
+       if ($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;