Improve doc for format-patch threading options.

diff --git a/git-cvsexportcommit.perl b/git-cvsexportcommit.perl
index 9ec1df95c0aa8aba01990362c49ae1c15e2e086f..59b672213bfc36f95db089f0e13bafc1c2f2ed71 100755 (executable)
--- a/git-cvsexportcommit.perl
+++ b/git-cvsexportcommit.perl
@@ -8,9 +8,9 @@
 use File::Spec;
 use Git;
 
-our ($opt_h, $opt_P, $opt_p, $opt_v, $opt_c, $opt_f, $opt_a, $opt_m, $opt_d, $opt_u, $opt_w, $opt_W);
+our ($opt_h, $opt_P, $opt_p, $opt_v, $opt_c, $opt_f, $opt_a, $opt_m, $opt_d, $opt_u, $opt_w, $opt_W, $opt_k);
 
-getopts('uhPpvcfam:d:w:W');
+getopts('uhPpvcfkam:d:w:W');
 
 $opt_h && usage();
 
@@ -259,7 +259,8 @@
            if $file =~ /^no file /
                && $status eq 'Up-to-date';
 
-       $cvsstat{$fullname{$file}} = $status;
+       $cvsstat{$fullname{$file}} = $status
+           if defined $fullname{$file};
       }
     }
 }
@@ -287,7 +288,26 @@
        $dirty = 1;
        warn "File $f not up to date but has status '$cvsstat{$f}' in your CVS checkout!\n";
     }
+
+    # Depending on how your GIT tree got imported from CVS you may
+    # have a conflict between expanded keywords in your CVS tree and
+    # unexpanded keywords in the patch about to be applied.
+    if ($opt_k) {
+       my $orig_file ="$f.orig";
+       rename $f, $orig_file;
+       open(FILTER_IN, "<$orig_file") or die "Cannot open $orig_file\n";
+       open(FILTER_OUT, ">$f") or die "Cannot open $f\n";
+       while (<FILTER_IN>)
+       {
+           my $line = $_;
+           $line =~ s/\$([A-Z][a-z]+):[^\$]+\$/\$$1\$/g;
+           print FILTER_OUT $line;
+       }
+       close FILTER_IN;
+       close FILTER_OUT;
+    }
 }
+
 if ($dirty) {
     if ($opt_f) {      warn "The tree is not clean -- forced merge\n";
        $dirty = 0;
@@ -391,7 +411,7 @@
 
 sub usage {
        print STDERR <<END;
-Usage: GIT_DIR=/path/to/.git git cvsexportcommit [-h] [-p] [-v] [-c] [-f] [-u] [-w cvsworkdir] [-m msgprefix] [ parent ] commit
+Usage: GIT_DIR=/path/to/.git git cvsexportcommit [-h] [-p] [-v] [-c] [-f] [-u] [-k] [-w cvsworkdir] [-m msgprefix] [ parent ] commit
 END
        exit(1);
 }