git-cvsimport-script: use private index.

diff --git a/git-cvsimport-script b/git-cvsimport-script
index cc68460..0531af3 100755 (executable)
--- a/git-cvsimport-script
+++ b/git-cvsimport-script
@@ -16,6 +16,8 @@
 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;
@@ -377,6 +379,12 @@ my %branch_date;
 my $git_dir = $ENV{"GIT_DIR"} || ".git";
 $git_dir = getwd()."/".$git_dir unless $git_dir =~ m#^/#;
 $ENV{"GIT_DIR"} = $git_dir;
+my $orig_git_index;
+$orig_git_index = $ENV{GIT_INDEX_FILE} if exists $ENV{GIT_INDEX_FILE};
+my ($git_ih, $git_index) = tempfile('gitXXXXXX', SUFFIX => '.idx',
+                                   DIR => File::Spec->tmpdir());
+close ($git_ih);
+$ENV{GIT_INDEX_FILE} = $git_index;
 unless(-d $git_dir) {
        system("git-init-db");
        die "Cannot init the GIT db at $git_tree: $?\n" if $?;
@@ -398,6 +406,9 @@ unless(-d $git_dir) {
        }
        $orig_branch = $last_branch;
 
+       # populate index
+       system('git-read-tree', $last_branch);
+
        # Get the last import timestamps
        opendir(D,"$git_dir/refs/heads");
        while(defined(my $head = readdir(D))) {
@@ -643,11 +654,6 @@ while(<CVS>) {
                        system("git-read-tree","-m","$last_branch","$branch");
                        die "read-tree failed: $?\n" if $?;
                }
-               if($branch ne $last_branch) {
-                       unlink("$git_dir/HEAD");
-                       symlink("refs/heads/$branch","$git_dir/HEAD");
-                       $last_branch = $branch;
-               }
                $state = 9;
        } elsif($state == 8) {
                $logmsg .= "$_\n";
@@ -686,26 +692,23 @@ while(<CVS>) {
 }
 &$commit() if $branch and $state != 11;
 
+unlink($git_index);
+
 # Now switch back to the branch we were in before all of this happened
 if($orig_branch) {
-       print "DONE; switching back to $orig_branch\n" if $opt_v;
+       print "DONE\n" if $opt_v;
 } else {
        $orig_branch = "master";
        print "DONE; creating $orig_branch branch\n" if $opt_v;
        system("cp","$git_dir/refs/heads/$opt_o","$git_dir/refs/heads/master")
                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 $?;
 }
-
-if ($orig_branch) {
-       system("git-read-tree",$last_branch);
-       die "read-tree failed: $?\n" if $?;
-} else {
-       system('git-read-tree', $orig_branch);
-       die "read-tree failed: $?\n" if $?;
-       system('git-checkout-cache', '-a');
-       die "checkout-cache failed: $?\n" if $?;
-}
-
-unlink("$git_dir/HEAD");
-symlink("refs/heads/$orig_branch","$git_dir/HEAD");
-