git-cvsimport-script: move working directory forward

[git.git] / git-cvsimport-script

diff --git a/git-cvsimport-script b/git-cvsimport-script
index 418c209..cdf9891 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);
+our($opt_h,$opt_o,$opt_v,$opt_d,$opt_p,$opt_C,$opt_z);
 
 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 ]
+       [ -o branch-for-HEAD ] [ -h ] [ -v ] [ -d CVSROOT ]
+       [ -p opts-for-cvsps ] [ -C GIT_repository ] [ -z fuzz ]
        [ CVS_module ]
 END
        exit(1);
 }
 
-getopts("hqvo:d:p:C:") or usage();
+getopts("hqvo:d:p:C:z:") or usage();
 usage if $opt_h;
 
 @ARGV <= 1 or usage();
@@ -359,8 +359,6 @@ sub pmode($) {
        return $m;
 }
 
-my $tmpcv = "/var/cache/cvs";
-
 sub getwd() {
        my $pwd = `pwd`;
        chomp $pwd;
@@ -374,6 +372,7 @@ chdir($git_tree);
 
 my $last_branch = "";
 my $orig_branch = "";
+my $forward_master = 0;
 my %branch_date;
 
 my $git_dir = $ENV{"GIT_DIR"} || ".git";
@@ -405,9 +404,25 @@ unless(-d $git_dir) {
                $last_branch = "master";
        }
        $orig_branch = $last_branch;
+       if (-f "$git_dir/CVS2GIT_HEAD") {
+               die <<EOM;
+CVS2GIT_HEAD exists.
+Make sure your working directory corresponds to HEAD and remove CVS2GIT_HEAD.
+You may need to run
+
+    git-read-tree -m -u CVS2GIT_HEAD HEAD
+EOM
+       }
+       system('cp', "$git_dir/HEAD", "$git_dir/CVS2GIT_HEAD");
+
+       $forward_master =
+           $opt_o ne 'master' && -f "$git_dir/refs/heads/master" &&
+           system('cmp', '-s', "$git_dir/refs/heads/master", 
+                               "$git_dir/refs/heads/$opt_o") == 0;
 
        # populate index
        system('git-read-tree', $last_branch);
+       die "read-tree failed: $?\n" if $?;
 
        # Get the last import timestamps
        opendir(D,"$git_dir/refs/heads");
@@ -436,7 +451,8 @@ die "Cannot fork: $!\n" unless defined $pid;
 unless($pid) {
        my @opt;
        @opt = split(/,/,$opt_p) if defined $opt_p;
-       exec("cvsps",@opt,"-x","-A","--cvs-direct",'--root',$opt_d,$cvs_tree);
+       unshift @opt, '-z', $opt_z if defined $opt_z;
+       exec("cvsps",@opt,"-u","-A","--cvs-direct",'--root',$opt_d,$cvs_tree);
        die "Could not start cvsps: $!\n";
 }
 
@@ -509,8 +525,8 @@ my $commit = sub {
                print "Parent ID $parent\n" if $opt_v;
        }
 
-       my $pr = IO::Pipe->new();
-       my $pw = IO::Pipe->new();
+       my $pr = IO::Pipe->new() or die "Cannot open pipe: $!\n";
+       my $pw = IO::Pipe->new() or die "Cannot open pipe: $!\n";
        $pid = fork();
        die "Fork: $!\n" unless defined $pid;
        unless($pid) {
@@ -695,9 +711,19 @@ while(<CVS>) {
 
 unlink($git_index);
 
+if (defined $orig_git_index) {
+       $ENV{GIT_INDEX_FILE} = $orig_git_index;
+} else {
+       delete $ENV{GIT_INDEX_FILE};
+}
+
 # Now switch back to the branch we were in before all of this happened
 if($orig_branch) {
        print "DONE\n" if $opt_v;
+       system("cp","$git_dir/refs/heads/$opt_o","$git_dir/refs/heads/master")
+               if $forward_master;
+       system('git-read-tree', '-m', '-u', 'CVS2GIT_HEAD', 'HEAD');
+       die "read-tree failed: $?\n" if $?;
 } else {
        $orig_branch = "master";
        print "DONE; creating $orig_branch branch\n" if $opt_v;
@@ -705,11 +731,7 @@ if($orig_branch) {
                unless -f "$git_dir/refs/heads/master";
        unlink("$git_dir/HEAD");
        symlink("refs/heads/$orig_branch","$git_dir/HEAD");
-       if (defined $orig_git_index) {
-           $ENV{GIT_INDEX_FILE} = $orig_git_index;
-       } else {
-           delete $ENV{GIT_INDEX_FILE};
-       }
        system('git checkout');
        die "checkout failed: $?\n" if $?;
 }
+unlink("$git_dir/CVS2GIT_HEAD");