ctest: add support for attaching files to tests at run time

Allow tests to specify files to upload at runtime. Previously this was
only possible to specify at configure time with the ATTACHED_FILES
test properties.

This commit also fixes a bug in how our test data tarballs were generated
by CTest. Previously, if you tried to attach a file outside of the binary
directory, CTest would generate a tar file with a relative path, and tar
would not allow you to extract it. We resolve this problem by creating
tar files with a flat directory structure instead.

Fixes: #22284

1 files changed, 3 insertions, 0 deletions

diff --git a/Source/cmCTest.h b/Source/cmCTest.h
index 392eb1c..551c116 100644
--- a/Source/cmCTest.h
+++ b/Source/cmCTest.h
@@ -536,6 +536,9 @@ private:
   int RunCMakeAndTest(std::string* output);
   int ExecuteTests();
 
+  /** return true iff change directory was successful */
+  bool TryToChangeDirectory(std::string const& dir);
+
   struct Private;
   std::unique_ptr<Private> Impl;
 };