1 files changed, 71 insertions, 0 deletions
diff --git a/build/cpR_noreplace.pl b/build/cpR_noreplace.pl
new file mode 100644
index 0000000..054f572
--- /dev/null
+++ b/build/cpR_noreplace.pl
@@ -0,0 +1,71 @@
+#!/usr/bin/perl -w
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+use strict;
+use File::Basename;
+use File::Copy;
+use File::Find;
+use File::Path qw(mkpath);
+
+require 5.010;
+
+my $srcdir;
+my $destdir;
+
+sub process_file {
+    return if $_ =~ /^\./;
+
+    my $rel_to_srcdir = substr($File::Find::name, length($srcdir));
+    my $destfile = "$destdir$rel_to_srcdir";
+
+    if (-d $File::Find::name) {
+        # If the directory is empty, it won't get created.
+        # Otherwise it will get created when copying a file.
+    }
+    else {
+        if (-f $destfile) {
+            # Preserve it.
+        }
+        else {
+            # Create it.
+            my $dir = dirname($destfile);
+            if (! -e $dir) {
+                mkpath($dir) or die "Failed to create directory $dir: $!";
+            }
+            copy($File::Find::name, $destfile) or die "Copy $File::Find::name->$destfile failed: $!";
+        }
+    }
+}
+
+$srcdir = shift;
+$destdir = shift;
+if (scalar(@ARGV) > 0) {
+    my $mode = shift;
+    if ($mode eq "ifdestmissing") {
+        # Normally the check for possible overwrite is performed on a
+        # file-by-file basis.  If "ifdestmissing" is specified and the
+        # destination directory exists, bail out.
+        if (-d $destdir) {
+            print "[PRESERVING EXISTING SUBDIR $destdir]\n";
+            exit(0);
+        }
+    }
+    else {
+        die "bad mode $mode";
+    }
+}
+find(\&process_file, ($srcdir));