CTest: Fix regression in ctest_start()

The format for the TAG file was changed in 3.12, and the way it was
read caused a regression which changed how the track was decided. This
commit fixes the regression.

Fixes #18347.

1 files changed, 4 insertions, 2 deletions

diff --git a/Source/cmCTest.cxx b/Source/cmCTest.cxx
index d0e668d..bcb754a 100644
--- a/Source/cmCTest.cxx
+++ b/Source/cmCTest.cxx
@@ -478,11 +478,13 @@ int cmCTest::Initialize(const char* binary_dir, cmCTestStartCommand* command)
           tag.clear();
         }
         std::string track;
-        if (cmSystemTools::GetLineFromStream(tfin, track)) {
+        if (cmSystemTools::GetLineFromStream(tfin, track) &&
+            !this->Parts[PartStart] && !command) {
           this->SpecificTrack = track;
         }
         std::string model;
-        if (cmSystemTools::GetLineFromStream(tfin, model)) {
+        if (cmSystemTools::GetLineFromStream(tfin, model) &&
+            !this->Parts[PartStart] && !command) {
           this->TestModel = GetTestModelFromString(model.c_str());
         }
         tfin.close();