Teach "git-read-tree -u" to check out submodules as a directory

diff --git a/git-cvsimport.perl b/git-cvsimport.perl
index 1a1ba7b1a6f779773702ae3c1efb56425c31beb4..ac74bc51b3197d06f13f588d6916400ac3e6fcf0 100755 (executable)
--- a/git-cvsimport.perl
+++ b/git-cvsimport.perl
@@ -32,12 +32,15 @@
 our ($opt_h,$opt_o,$opt_v,$opt_k,$opt_u,$opt_d,$opt_p,$opt_C,$opt_z,$opt_i,$opt_P, $opt_s,$opt_m,$opt_M,$opt_A,$opt_S,$opt_L, $opt_a);
 my (%conv_author_name, %conv_author_email);
 
-sub usage() {
+sub usage(;$) {
+       my $msg = shift;
+       print(STDERR "Error: $msg\n") if $msg;
        print STDERR <<END;
 Usage: ${\basename $0}     # fetch/update GIT from CVS
        [-o branch-for-HEAD] [-h] [-v] [-d CVSROOT] [-A author-conv-file]
-       [-p opts-for-cvsps] [-C GIT_repository] [-z fuzz] [-i] [-k] [-u]
-       [-s subst] [-a] [-m] [-M regex] [-S regex] [CVS_module]
+       [-p opts-for-cvsps] [-P file] [-C GIT_repository] [-z fuzz] [-i] [-k]
+       [-u] [-s subst] [-a] [-m] [-M regex] [-S regex] [-L commitlimit]
+       [CVS_module]
 END
        exit(1);
 }
@@ -116,7 +119,7 @@ sub read_repo_config {
 getopts($opts) or usage();
 usage if $opt_h;
 
-@ARGV <= 1 or usage();
+@ARGV <= 1 or usage("You can't specify more than one CVS module");
 
 if ($opt_d) {
        $ENV{"CVSROOT"} = $opt_d;
@@ -129,7 +132,7 @@ sub read_repo_config {
 } elsif ($ENV{"CVSROOT"}) {
        $opt_d = $ENV{"CVSROOT"};
 } else {
-       die "CVSROOT needs to be set";
+       usage("CVSROOT needs to be set");
 }
 $opt_o ||= "origin";
 $opt_s ||= "-";
@@ -148,7 +151,7 @@ sub read_repo_config {
        chomp $cvs_tree;
        close $f;
 } else {
-       usage();
+       usage("CVS module has to be specified");
 }
 
 our @mergerx = ();