1 files changed, 17 insertions, 8 deletions
diff --git a/tests/test/script/runner/driver.cxx b/tests/test/script/runner/driver.cxx
index 08d5bba..d5a74a4 100644
--- a/tests/test/script/runner/driver.cxx
+++ b/tests/test/script/runner/driver.cxx
@@ -34,22 +34,22 @@ main (int argc, char* argv[])
   using butl::optional;
 
   // Usage: driver [-i <int>] (-o <string>)* (-e <string>)* (-f <file>)*
-  //        (-d <dir>)* [(-t (a|m|s|z)) | (-s <int>)]
+  //        (-d <dir>)* (-v <name>)* [(-t (a|m|s|z)) | (-s <int>)]
   //
-  // Execute actions specified by -i, -o, -e, -f, -d options in the order as
-  // they appear on the command line. After that terminate abnormally if -t
-  // option is provided, otherwise exit normally with the status specified by
-  // -s option (0 by default).
+  // Execute actions specified by -i, -o, -e, -f, -d, and -v options in the
+  // order as they appear on the command line. After that terminate abnormally
+  // if -t option is provided, otherwise exit normally with the status
+  // specified by -s option (0 by default).
   //
   // -i <fd>
-  //    Forward STDIN data to the standard stream denoted by the file
+  //    Forward stdin data to the standard stream denoted by the file
   //    descriptor. Read and discard if 0.
   //
   // -o <string>
-  //    Print the line to STDOUT.
+  //    Print the line to stdout.
   //
   // -e <string>
-  //    Print the line to STDERR.
+  //    Print the line to stderr.
   //
   // -f <path>
   //    Create an empty file with the path specified.
@@ -58,6 +58,10 @@ main (int argc, char* argv[])
   //    Create a directory with the path specified. Create parent directories
   //    if required.
   //
+  // -v <name>
+  //    If the specified variable is set the print its value to stdout and the
+  //    string '<none>' otherwise.
+  //
   // -t <method>
   //    Abnormally terminate itself using one of the following methods:
   //
@@ -135,6 +139,11 @@ main (int argc, char* argv[])
     {
       try_mkdir_p (dir_path (v));
     }
+    else if (o == "-v")
+    {
+      optional<string> var (getenv (v));
+      cout << (var ? *var : "<none>") << endl;
+    }
     else if (o == "-t")
     {
       assert (aterm == '\0' && !status); // Make sure exit method is not set.